ETC MAX5417-MAX5419数字电位器

19-3185; Rev 2; 8/04
256 抽头、非易失、I 2C 接口
数字电位器
________________________________特性
MAX5417/MAX5418/MAX5419 是非易失、线性数字电位
器，与机械电位器功能相似，但可通过简单的 2 线数字接
口控制，允许多个器件进行通信。每个器件具有分离电
位器或可变电阻的功能，具有 256 个抽头点。
♦ 上电后从非易失存储器调用滑动端位置
这些器件内置非易失 EEPROM，用于存储滑动端的位置，
上电时进行初始化处理。快速模式 I 2 C TM 兼容接口允许
400kbps 的通信速率，在许多应用场合可有效减小电路板
面积，简化电路连接。每个器件有一个工厂预置地址，
有四种地址选择 ( 见 选择指南 ) ，配合地址选择输入，共
提供八个唯一的地址组合。
MAX5417/MAX5418/MAX5419提供了三个标称阻值：50kΩ
(MAX5417)、100kΩ (MAX5418)和 200kΩ (MAX5419)。
标称电阻的端到端温度系数为 35ppm/°C, 比率温度系数仅
为 5ppm/°C，非常适合低温漂可变电阻的应用，如低漂移、
可编程增益放大器。
♦ 微型 3mm x 3mm、8 引脚 TDFN 封装
♦ 端到端电阻温度系数：35ppm/°C
♦ 比率温度系数：5ppm/°C
♦ 阻值：50kΩ/100kΩ/200kΩ
♦ 快速 I2C 兼容串行接口
♦ 500nA (典型值 )静态电流
♦ 单电源 +2.7V 至 +5.25V 供电
♦ 256 抽头
♦ 分压模式下 DNL 为：±0.5 LSB
♦ 分压模式下 INL 为：±0.5 LSB
______________________________功能图
H
MAX5417/MAX5418/MAX5419 采用 3mm x 3mm、8 引脚
TDFN 封装，工作在 -40°C 至 +85°C 扩展级温度范围。
VDD
GND
8-BIT
SHIFT
REGISTER
8
8-BIT 8
LATCH
256256
POSITION
DECODER
W
L
________________________________应用
SDA
SCL
替代机械电位器
低漂移可编程增益放大器
I2C
INTERFACE
POR
8-BIT
NV
MEMORY
A0
MAX5417
MAX5418
MAX5419
音量控制
I 2C 是 Philips Corp.的一个商标。
购买 Maxim Integrated Products, Inc.或其从属授权公司的 I 2C
产品，即得到了 Philips I 2C 的专利许可、将这些产品用于符合
Philips 定义的 I 2C 标准规范的系统。
液晶显示屏 (LCD)对比度控制
___________________________________________________________ 定购信息 /选择指南
PART
MAX5417LETA
TEMP RANGE
I2C ADDRESS
R (kΩ)
-40°C to +85°C
010100A0
50
8 TDFN-EP**
AIB
ALS
PIN-PACKAGE
TOP MARK
MAX5417META*
-40°C to +85°C
010101A0
50
8 TDFN-EP**
MAX5417NETA*
-40°C to +85°C
010110A0
50
8 TDFN-EP**
ALT
MAX5417PETA*
MAX5418LETA
-40°C to +85°C
-40°C to +85°C
010111A0
010100A0
50
100
8 TDFN-EP**
8 TDFN-EP**
ALU
AIC
MAX5418META*
-40°C to +85°C
010101A0
100
8 TDFN-EP**
ALV
MAX5418NETA*
-40°C to +85°C
010110A0
100
8 TDFN-EP**
ALW
MAX5418PETA*
MAX5419LETA
-40°C to +85°C
-40°C to +85°C
010111A0
010100A0
100
200
8 TDFN-EP**
8 TDFN-EP**
ALX
AID
MAX5419META*
-40°C to +85°C
010101A0
200
8 TDFN-EP**
ALY
MAX5419NETA*
-40°C to +85°C
010110A0
200
8 TDFN-EP**
ALZ
MAX5419PETA*
-40°C to +85°C
*Future product—contact factory for availability.
**Exposed pad.
010111A0
200
8 TDFN-EP**
AMA
引脚配置见本文的最后部分。
________________________________________________________________ Maxim Integrated Products
1
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MAX5417/MAX5418/MAX5419
________________________________概述
MAX5417/MAX5418/MAX5419
256 抽头、非易失、I 2C 接口
数字电位器
ABSOLUTE MAXIMUM RATINGS
VDD to GND ...........................................................-0.3V to +6.0V
All Other Pins to GND.................................-0.3V to (VDD + 0.3V)
Maximum Continuous Current into H, L, and W
MAX5417......................................................................±1.3mA
MAX5418......................................................................±0.6mA
MAX5419......................................................................±0.3mA
Continuous Power Dissipation (TA = +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +2.7V to +5.25V, H = VDD, L = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC PERFORMANCE (VOLTAGE-DIVIDER MODE)
Resolution
256
Taps
Integral Nonlinearity
INL
(Note 1)
±0.5
LSB
Differential Nonlinearity
DNL
(Note 1)
±0.5
LSB
End-to-End Temperature
Coefficient
TCR
Ratiometric Temperature
Coefficient
MAX5417_, 50Ω
MAX5418_, 100kΩ
MAX5419_, 200kΩ
Full-Scale Error
Zero-Scale Error
35
ppm/°C
5
ppm/°C
-0.6
-0.3
-0.15
LSB
MAX5417_, 50kΩ
0.6
MAX5418_, 100kΩ
MAX5419_, 200kΩ
0.3
0.15
LSB
DC PERFORMANCE (VARIABLE-RESISTOR MODE)
Integral Nonlinearity
(Note 2)
INL
VDD = 3V
±3
VDD = 5V
±1.5
VDD = 3V, MAX5417_, 50kΩ,
guaranteed monotonic
Differential Nonlinearity
(Note 2)
DNL
-1
LSB
+2
VDD = 3V, MAX5418_, 100kΩ
±1
MAX5419_, 200kΩ
±1
VDD = 5V
±1
LSB
DC PERFORMANCE (RESISTOR CHARACTERISTICS)
Wiper Resistance
RW
Wiper Capacitance
CW
End-to-End Resistance
2
RHL
VDD = 3V to 5.25V (Note 3)
325
675
10
pF
MAX5417_
37.5
50
62.5
MAX5418_
75
100
125
MAX5419_
150
200
250
_______________________________________________________________________________________
Ω
kΩ
256 抽头、非易失、I 2C 接口
数字电位器
(VDD = +2.7V to +5.25V, H = VDD, L = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUTS
Input High Voltage (Note 4)
VIH
VDD = 3.4V to 5.25V
VDD < 3.4V
2.4
V
0.7 x VDD
Input Low Voltage
VIL
VDD = 2.7V to 5.25V (Note 4)
0.8
V
Low-Level Output Voltage
VOL
3mA sink current
0.4
V
±1
µA
Input Leakage Current
ILEAK
Input Capacitance
5
pF
DYNAMIC CHARACTERISTICS
MAX5417_
Wiper -3dB Bandwidth (Note 5)
100
MAX5418_
50
MAX5419_
25
kHz
NONVOLATILE MEMORY
Data Retention
Endurance
TA = +85°C
50
TA = +25°C
200,000
TA = +85°C
50,000
Years
Stores
POWER SUPPLY
Power-Supply Voltage
Standby Current
VDD
IDD
Programming Current
2.70
Digital inputs = VDD or GND,
TA = +25°C
During nonvolatile write;
digital inputs = VDD or GND (Note 6)
5.25
V
0.5
1
µA
200
400
µA
TIMING CHARACTERISTICS
(VDD = +2.7V to +5.25V, H = VDD, L = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA =
+25°C. See Figures 1 and 2.) (Note 7)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SECTION
MAX5417_
Wiper Settling Time (Note 8)
tIL
500
MAX5418_
600
MAX5419_
1000
ns
DIGITAL SECTION
SCL Clock Frequency
fSCL
400
kHz
Setup Time for START Condition
tSU-STA
0.6
µs
Hold Time for START Condition
tHD-STA
0.6
µs
CLK High Time
tHIGH
0.6
µs
CLK Low Time
tLOW
1.3
µs
_______________________________________________________________________________________
3
MAX5417/MAX5418/MAX5419
ELECTRICAL CHARACTERISTICS (continued)
MAX5417/MAX5418/MAX5419
256 抽头、非易失、I 2C 接口
数字电位器
TIMING CHARACTERISTICS (continued)
(VDD = +2.7V to +5.25V, H = VDD, L = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA =
+25°C. See Figures 1 and 2.) (Note 7)
PARAMETER
SYMBOL
CONDITIONS
MIN
Data Setup Time
tSU-DAT
100
Data Hold Time
tHD-DAT
0
TYP
MAX
UNITS
0.9
µs
ns
ns
SDA, SCL Rise Time
tR
300
SDA, SCL Fall Time
tF
300
Setup Time for STOP Condition
tSU-STO
Bus Free Time Between STOP
and START Condition
tBUF
Minimum power-up rate = 0.2V/ms
Pulse Width of Spike Suppressed
tSP
Maximum Capacitive Load for
Each Bus Line
CB
(Note 9)
Write NV Register Busy Time
tBUSY
(Note 10)
ns
0.6
µs
1.3
µs
50
400
ns
pF
12
ms
Note 1: The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = VDD and L = GND. The
wiper terminal is unloaded and measured with a high-input-impedance voltmeter.
Note 2: The DNL and INL are measured with the potentiometer configured as a variable resistor. H is unconnected and L = GND.
For the 5V condition, the wiper terminal is driven with a source current of 80µA for the 50kΩ configuration, 40µA for the
100kΩ configuration, and 20µA for the 200kΩ configuration. For the 3V condition, the wiper terminal is driven with a source
current of 40µA for the 50kΩ configuration, 20µA for the 100kΩ configuration, and 10µA for the 200kΩ configuration.
Note 3: The wiper resistance is measured using the source currents given in Note 2. For operation to VDD = 2.7V, see Wiper
Resistance vs. Temperature in the Typical Operating Characteristics.
Note 4: The device draws higher supply current when the digital inputs are driven with voltages between (VDD - 0.5V) and (GND +
0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.
Note 5: Wiper at midscale with a 10pF load (DC measurement). L = GND; an AC source is applied to H; and the W output is measured. A 3dB bandwidth occurs when the AC W/H value is 3dB lower than the DC W/H value.
Note 6: The programming current operates only during power-up and NV writes.
Note 7: SCL clock period includes rise and fall times tR and tF. All digital input signals are specified with tR = tF = 2ns and timed
from a voltage level of (VIL + VIH) / 2.
Note 8: Wiper settling time is the worst-case 0% to 50% rise time measured between consecutive wiper positions. H = VDD,
L = GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see the Typical Operating
Characteristics for the tap-to-tap switching transient).
Note 9: An appropriate bus pullup resistance must be selected depending on board capacitance. Refer to the document linked to
this web address: www.semiconductors.philips.com/acrobat/literature/9398/39340011.pdf.
Note 10: The idle time begins from the initiation of the stop pulse.
4
_______________________________________________________________________________________
256 抽头、非易失、I 2C 接口
数字电位器
(VDD = +5V, TA = +25°C, unless otherwise noted.)
INL vs. TAP POSITION
0.05
0
-0.05
-0.10
0.10
0.05
0
-0.05
-0.10
-0.15
-0.15
-0.20
-0.20
-0.25
32
64
96
500
400
300
200
100
-0.25
0
128 160 192 224 256
0
32
TAP POSITION
64
96
128 160 192 224 256
0
32
64
TAP POSITION
96
128 160 192 224 256
TAP POSITION
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
WIPER TRANSIENT AT POWER-ON
MAX5417 toc04
W
1V/div
CL = 10pF
TAP = 128
H = VDD
MAX5417 toc05
1.0
END-TO-END RESISTANCE % CHANGE
VDD
2V/div
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
4µs/div
-40
-15
10
35
85
60
TEMPERATURE (°C)
STANDBY SUPPLY CURRENT
vs. TEMPERATURE
WIPER RESISTANCE vs. TEMPERATURE
700
600
RESISTANCE (Ω)
0.8
0.6
0.4
0.2
MAX5417 toc07
1.0
MAX5417 toc06
0
VDD = 2.7V
ISRC = 50µA
600
RESISTANCE (Ω)
RESISTANCE INL (LSB)
0.15
0.10
STANDBY SUPPLY CURRENT (µA)
RESISTANCE DNL (LSB)
0.15
VOLTAGE-DIVIDER MODE
0.20
700
MAX5417 toc02
MAX5417 toc01
VOLTAGE-DIVIDER MODE
0.20
WIPER RESISTANCE vs. TAP POSITION
0.25
MAX5417 toc03
DNL vs. TAP POSITION
0.25
VDD = 2.7V
500
400
VDD = 3.0V
300
VDD = 4.5V
200
VDD = 5.25V
100
0
0
-40
-15
10
35
TEMPERATURE (°C)
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
_______________________________________________________________________________________
5
MAX5417/MAX5418/MAX5419
_______________________________________________________________ 典型工作特性
___________________________________________________________ 典型工作特性 (续 )
(VDD = +5V, TA = +25°C, unless otherwise noted.)
INL vs. TAP POSITION
(MAX5417)
THD+N RESPONSE
10
400
1:1 RATIO
20Hz TO 20kHz BANDPASS
THD+N (%)
1
300
0.1
200
0.01
100
0.001
0
0.0001
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 50µA
2.5
RESISTANCE INL (LSB)
500
3.0
MAX5417 toc09
100
MAX5417 toc08
600
2.0
MAX5417 toc10
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
SUPPLY CURRENT (µA)
1.5
1.0
0.5
0
1
2
3
4
5
-0.5
-1.0
10
DIGITAL INPUT VOLTAGE (V)
100
1k
10k
100k
96
1.00
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 10µA
0.75
0.50
INL (LSB)
1.0
INL (LSB)
64
128 160 192 224 256
INL vs. TAP POSITION
(MAX5419)
MAX5417 toc11
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 20µA
1.5
32
TAP POSITION
INL vs. TAP POSITION
(MAX5418)
2.0
0
FREQUENCY (Hz)
0.5
MAX5417 toc12
0
0.25
0
-0.25
0
-0.50
-0.5
-0.75
-1.00
32
64
96
0
128 160 192 224 256
32
64
96
128 160 192 224 256
TAP POSITION
TAP POSITION
DNL vs. TAP POSITION
(MAX5417)
DNL vs. TAP POSITION
(MAX5418)
0.5
VARIABLE-RESISTOR MODE
0.4
0.3
MAX5417 toc13
0
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 20µA
0.2
0.3
MAX5417 toc14
-1.0
0.1
0.2
DNL (LSB)
DNL (LSB)
MAX5417/MAX5418/MAX5419
256 抽头、非易失、I 2C 接口
数字电位器
0.1
0
0
-0.1
-0.1
-0.2
-0.2
-0.3
0
32
64
96
128 160 192 224 256
TAP POSITION
6
-0.3
0
32
64
96
128 160 192 224 256
TAP POSITION
_______________________________________________________________________________________
256 抽头、非易失、I 2C 接口
数字电位器
(VDD = +5V, TA = +25°C, unless otherwise noted.)
MIDSCALE WIPER RESPONSE vs. FREQUENCY
(MAX5417)
-5
-0.1
-0.2
CL = 10pF
-10
-15
CL = 50pF
-20
-25
-0.3
32
64
96
128 160 192 224 256
MAX5418
TAP = 128
-5
CL = 10pF
-10
-15
CL = 50pF
-20
-25
-30
-30
1
TAP POSITION
10
100
1000
1
FREQUENCY (kHz)
MIDSCALE WIPER RESPONSE vs. FREQUENCY
(MAX5419)
10
100
1000
FREQUENCY (kHz)
TAP-TO-TAP SWITCHING TRANSIENT
(MAX5417)
MAX5417 toc19
0
MAX5417 toc18
0
0
WIPER RESPONSE (dB)
WIPER RESPONSE (dB)
0
-5
MAX5419
TAP = 128
-10
WIPER RESPONSE (dB)
DNL (LSB)
0.1
MAX5417
TAP = 128
MAX5417 toc16
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 10µA
0.2
0
MAX5417 toc15
0.3
MIDSCALE WIPER RESPONSE vs. FREQUENCY
(MAX5418)
MAX5417 toc17
DNL vs. TAP POSITION
(MAX5419)
CL = 10pF
SDA
2V/div
-15
-20
CL = 50pF
-25
MAX5417
CL = 10pF
FROM TAP 127
TO TAP 128
H = VDD
-30
-35
-40
W
10mV/div
-45
1
10
1000
100
1µs/div
FREQUENCY (kHz)
TAP-TO-TAP SWITCHING TRANSIENT
(MAX5418)
TAP-TO-TAP SWITCHING TRANSIENT
(MAX5419)
MAX5417 toc20
MAX5417 toc21
SDA
2V/div
SDA
2V/div
W
10mV/div
W
10mV/div
MAX5418
CL = 10pF
FROM TAP 127
TO TAP 128
H = VDD
1µs/div
MAX5419
CL = 10pF
FROM TAP 127
TO TAP 128
H = VDD
1µs/div
_______________________________________________________________________________________
7
MAX5417/MAX5418/MAX5419
___________________________________________________________ 典型工作特性 (续 )
MAX5417/MAX5418/MAX5419
256 抽头、非易失、I 2C 接口
数字电位器
___________________________________________________________________ 引脚说明
功能
FUNCTION
引脚
PIN
名称
NAME
1
VDD
电源输入，电压范围：2.7V至
5.25V。用
Power-Supply
Input. 2.7V to 5.25V
voltage0.1µF电容旁路
range. BypassVwith
0.1µF capacitor from VDD to GND.
DD 至aGND。
2
SCL
2C接口时钟输入
I2IC-Interface
Clock Input
3
SDA
2C接口数据输入
I2IC-Interface
Data Input
4
A0
5
GND
地址输入端，设置器件
Address
Input. Sets the ID的
A0 bitA0位。
in the device ID address.
地
Ground
6
L
低端Terminal
Low
7
W
滑动端Terminal
Wiper
8
H
高端Terminal
High
—
EP
裸露焊盘Pad
Exposed
tR
tF
SDA
tSU-DAT
tHD-DAT
tLOW
tBUF
tHD-STA
tSU-STA
tSU-STO
SCL
tHIGH
tHD-STA
tF
tR
S
Sr
A
P
S
PARAMETERS ARE MEASURED FROM 30% TO 70%.
图 1. I 2C 串行接口时序
____________________________ 详细说明
VDD
IOL = 3mA
VOUT
SDA
400pF
IOH = 0mA
MAX5417/MAX5418/MAX5419 内置电阻阵列，包含 255
个电阻单元。MAX5417 端到端阻值为 50kΩ，MAX5418
端到端阻值为 100kΩ，MAX5417 端到端阻值为 200kΩ。
MAX5417/MAX5418/MAX5419 通过连接高端、低端和滑
动端可以构成标准的分压器，H、L 和 W 端可以任意配置，
只需保证各端电压在 GND 和 VDD 之间。
简单的 2 线 I2C 兼容串行接口可以在 256 个触点间调节滑
动端。非易失存储器储存并在上电时恢复滑动端的位置。
非易失存储器确保 200,000 次抽头读写，寄存器数据可保
持 50 年。
图 2. 负载电路
8
_______________________________________________________________________________________
256 抽头、非易失、I 2C 接口
数字电位器
MAX5417/MAX5418/MAX5419 作为从设备从 I 2 C 或
SMBusTM兼容的 2线接口接收数据，该接口采用串行数据线
(SDA)和串行时钟线 (SCL)实现主、从设备之间的通信。
主设备通常是微控制器，启动 MAX5417/MAX5418/
MAX5419 的全部数据传输，并产生 SCL 时钟，同步数据
传输 (见图 1)。
MAX5417/MAX5418/MAX5419 内置一个电阻阵列，包含
255 个电阻单元； 256 个抽头点可以沿着 H、L 之间的电阻
串接至滑动端 (W)。滑动端的位置选择通过 2 线 (I2C)接
口对数字电位器编程实现。8 位数据，一个地址字节，和
一个控制字节设置抽头位置。 MAX5417/MAX5418/
MAX5419 的 H 、 L 端与机械电位器的两个端点相同。
MAX5417/MAX5418/MAX5419 带有上电复位电路，在上
电时从非易失存储器自动装载滑动端的位置。
MAX5417/MAX5418/MAX5419 的 SDA 可作为输入或漏极
开路输出，SDA 线上需要一个典型值为 4.7kΩ 的上拉电阻。
MAX5417/MAX5418/MAX5419 的 SCL 只能作为输入端。
若 2 线接口挂接有多个主机，或者是具有 SCL 漏极开路输
出的单主机系统，SCL 线上需接典型值为 4.7kΩ 的上拉电
阻。
数字接口
MAX5417/MAX5418/MAX5419 内置非易失 EEPROM ，
用于存储滑动端的位置，以便上电时的初始化处理。移
位寄存器对控制位和地址位进行解码，将数据写入适当
的数据寄存器。数据可以写入易失存储寄存器，立即更
新滑动端的位置，也可以写入非易失寄存器存储。
每次数据传输先由主机发送启动 (START)条件 (S) (图 3)，
然后发送 MAX5417/MAX5418/MAX5419 的 7 位从地址和第
8 位 (图 4)，1 个命令字节 (图 7)和 1 个数据字节，最后是
停止 (STOP)条件 (P) (图 3)。
易失寄存器在系统加电期间能够保持数据。一旦系统断
电，易失寄存器的内容被清除。非易失寄存器在系统断
电时仍能保存数据。一旦上电，上电复位电路将非易失
存储器的内容自动传送到易失寄存器中，更新滑动端的
位置。
启动条件和停止条件
接口不工作时 SCL 和 SDA 均为高。主机发送启动条件开
始数据传输，即 SCL 为高电平时 SDA 出现由高至低的下
降沿。当主机完成与从机的通信后发送停止条件，即在
SCL 为高电平时 SDA 出现由低至高的上升沿。然后释放
总线，进行另外的传输 (图 3)。
位传输
每个时钟传输一个数据位。SCL 为高时，SDA 上的数据必
需保持稳定 (图 5)。
SDA
SCL
S
P
START
CONDITION
STOP
CONDITION
图 3. 启动条件和停止条件
SDA
0
1
0
1
MSB
0*
0*
A0
NOP/W
ACK
LSB
SCL
*See the Ordering Information/Selector Guide section for other address options.
图 4. 从地址
SMBus 是 Intel Corporation 的一个商标。
_______________________________________________________________________________________
9
MAX5417/MAX5418/MAX5419
串行寻址
模拟电路
MAX5417/MAX5418/MAX5419
256 抽头、非易失、I 2C 接口
数字电位器
表 1. MAX5417/MAX5418/MAX5419 的地址码
ADDRESS BYTE
PART SUFFIX
A6
A5
A4
A3
A2
A1
A0
NOP/W
L
0
1
0
1
0
0
0
NOP/W
L
0
1
0
1
0
0
1
NOP/W
M
0
1
0
1
0
1
0
NOP/W
M
0
1
0
1
0
1
1
NOP/W
N
0
1
0
1
1
0
0
NOP/W
N
0
1
0
1
1
0
1
NOP/W
P
0
1
0
1
1
1
0
NOP/W
P
0
1
0
1
1
1
1
NOP/W
应答信号
应答位是第 9 个时钟位，它是收到每个数据字节的应答握
手信号 (图 6)。因此，每个字节的有效传输需要 9 位。主
机产生第 9 个时钟脉冲，接收端在应答时钟周期内将
SDA 拉低，所以，在时钟为高电平期间 SDA 必须稳定在
低电平。当主机向 MAX5417/MAX5418/MAX5419 传输数
据时，MAX5417/MAX5418/MAX5419 产生应答信号，因
为它们是数据的接收者。
MAX5417/MAX5418/MAX5419 提供四种从地址 (表 1)。
MAX5417/MAX5418/MAX5419 的高 4 位地址始终为 0101，
接下来的 2 位由工厂设置 (见表 1)。将 A0 输入接 GND 或
V DD，可以在两个唯一地址中为器件选择做出选择。只
有具有唯一地址的器件才能共享总线。因此，最多可以
有 8 个 MAX5417/MAX5418/MAX5419 挂接在同一总
线上。
从地址
MAX5417/MAX5418/MAX5419 具有 7 位从地址 (图 4)。
紧随 7 位从地址的第 8 位是 NOP/W 位，NOP/W 位置低表
示写操作，置高表示空操作。
CLOCK PULSE FOR
ACKNOWLEDGMENT
START
CONDITION
SDA
SCL
1
2
8
NOT ACKNOWLEDGE
SCL
SDA
DATA STABLE,
DATA VALID
图 5. 位传输
10
CHANGE OF
DATA ALLOWED
ACKNOWLEDGE
图 6. 应答信号
______________________________________________________________________________________
9
256 抽头、非易失、I 2C 接口
数字电位器
D14
D13
D12
D11
D10
D9
MAX5417/MAX5418/MAX5419
D15
CONTROL BYTE IS STORED ON RECEIPT OF STOP CONDITION
D8
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
S
SLAVE ADDRESS
0
CONTROL BYTE
A
A
P
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
NOP/W
图 7. 接收到的命令字节
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
HOW CONTROL BYTE AND DATA BYTE MAP INTO
MAX5417/MAX5418/MAX5419 REGISTERS
D15 D14 D13 D12 D11 D10
D9
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
D8
D7
D6
D5
D4
D3
D2
D1
D0
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
S
SLAVE ADDRESS
0
A
CONTROL BYTE
NOP/W
A
DATA BYTE
A
P
1 BYTE
图 8. 接收到的命令和单个数据字节
写数据格式
向 MAX5417/MAX5418/MAX5419 写入数据时，传输内容
包括器件从地址字节 (第 8 位置零 )和至少一个字节的信息
(图 7)。第 1 个信息字节为命令字节，命令字节之后是数
据字节。第一个数据字节按照命令字节的选择写入内部
寄存器 (图 8)。
命令字节
命令字节用于选择滑动端数据的源地址和目的地址 (非易
失或易失存储寄存器 )，或在非易失或易失存储寄存器之
间交换数据 (见表 2)。
命令说明
VREG ： 数据字节写入易失存储寄存器，滑动端位置更
新为易失存储寄存器中的数据。
NVREG：数据字节写入非易失存储寄存器，滑动端位置
保持不变。
NVREGxVREG：数据从非易失存储寄存器传送到易失
寄存器 (滑动端位置更新 )。
VREGxNVREG： 数据从易失寄存器传送到非易失存储
寄存器。
______________________________________________________________________________________
11
MAX5417/MAX5418/MAX5419
256 抽头、非易失、I 2C 接口
数字电位器
表 2. 命令字节
ADDRESS BYTE
SCL CYCLE
NUMBER
S
1
2
A6 A5
0
VREG
1
5
6
CONTROL BYTE
3
4
7
A4
A3
A2 A1
A0
0
1
A2 A1
A0
8
9
10
ACK
0
DATA BYTE
11
12
13
14
15
16
17
18
TX
NV
V
R3
R2
R1
R0
ACK
0
0
1
0
0
0
1
0
19
20
21
22
23
24
25
26
27
ACK
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D3
D2
D1
D0
NVREG
0
1
0
1
A2 A1
A0
0
0
0
1
0
0
0
0
1
D7
D6
D5
D4
D3
D2
D1
D0
NVREGxVREG
0
1
0
1
A2 A1
A0
0
0
1
1
0
0
0
0
1
D7
D6
D5
D4
D3
D2
D1
D0
VREGxNVREG
0
1
0
1
A2 A1
A0
0
0
1
0
1
0
0
0
1
D7
D6
D5
D4
D3
D2
D1
D0
P
非易失存储器
LCD 正偏置控制
内置 EEPROM 包含一个 8 位非易失寄存器，保留断电前
写入的数据。非易失寄存器在工厂预置为零值。
图 9 和图 10 显示了用分压器或可变电阻调节 LCD 正向偏
置电压的应用电路图。运放提供电阻分压电路的缓冲和
放大，电阻分压电路可以由电位器构成 (图 9)，或由一个
固定电阻串联一个可变电阻构成 (图 10)。
上电
上电时，MAX5417/MAX5418/MAX5419 将存储在非易失
寄存器的数据装入易失寄存器内，并随之更新抽头位置。
初始化过程需要 10µs。
待机
可编程滤波器
图 11 为一阶可编程滤波器电路。滤波器的增益由 R2 调节，
截止频率通过 R3 调节。利用下式计算增益 (G)和 3dB 截
止频率 (fC)：
MAX5417/MAX5418/MAX5419 具有低功耗待机模式。器
件没有编程时，进入待机模式，电流消耗典型值为
500nA。
R1
R2
1
fC =
2π × R3 × C
G = 1+
____________________________ 应用信息
MAX5417/MAX5418/MAX5419 用于需要数控调节电阻的
系统，如 LCD 对比度调节 (利用偏置电压调节显示器对比
度 )，可调增益和/或截止频率的可编程滤波器等。
5V
5V
H
30V
30V
W
MAX5417
MAX5418
MAx5419
L
VOUT
H
VOUT
MAX5417
MAX5418
MAX5419
W
L
图 9. 用分压器实现 LCD 正偏调节
12
图 10. 用可变电阻实现 LCD 正偏调节
______________________________________________________________________________________
256 抽头、非易失、I 2C 接口
数字电位器
5V
VIN
L
H
R3
C
MAX5417
MAX5418
MAX5419
VOUT
7
1
3
R1
8
6
MAX410
2
H
MAX5417
MAX5418
MAX5419
4
W
R2
W
-5V
L
R2
L
R1
H
图 13. 失调电压与增益调节电路
图 11. 可编程滤波器
____________________________引脚配置
+5V
TOP VIEW
VIN
V0 REF
OUT
H
VDD 1
MAX6160
ADJ
MAX5417
MAX5418
MAX5419
GND
8 H
W
SCL 2
L
SDA 3
7 W
MAX5417
MAX5418
MAX5419
A0 4
V0 = 1.23V 50kΩ FOR THE MAX5417
R2(kΩ)
V0 = 1.23V 100kΩ FOR THE MAX5418
R2(kΩ)
200kΩ
V0 = 1.23V
FOR THE MAX5419
R2(kΩ)
图 12. 可调电压基准
可调电压基准
图 12 所示为使用 MAX5417/MAX5418/MAX5419 作为
多级可调电压基准应用中的反馈电阻。通过改变 MAX5417/
MAX5418/MAX5419 滑动端的位置，可在从 1.23V 至
VIN - 0.2V 的范围内独立调节 MAX6160 的输出电压。
6 L
5 GND
TDFN
失调电压和增益调节
将 MAX5417 中一个电位器的高端和低端分别接 MAX410
的 NULL 输入，滑动端接运放的正电源，可在整个工作温
度范围内调节失调电压。另一个电位器用在 MAX410 的反
馈回路上以调节其增益。
____________________________芯片信息
TRANSISTOR COUNT: 4637
PROCESS: BiCMOS
______________________________________________________________________________________
13
MAX5417/MAX5418/MAX5419
W
___________________________________________________________________ 封装信息
(本数据资料提供的封装图可能不是最近的规格，如需最近的封装外型信息，请查询 www.maxim-ic.com.cn/packages。)
6, 8, &10L, DFN THIN.EPS
MAX5417/MAX5418/MAX5419
256 抽头、非易失、I 2C 接口
数字电位器
D
N
PIN 1
INDEX
AREA
E
E2
DETAIL A
CL
CL
L
A
L
e
e
PACKAGE OUTLINE, 6, 8, 10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
14
21-0137
______________________________________________________________________________________
F
1
2
256 抽头、非易失、I 2C 接口
数字电位器
(本数据资料提供的封装图可能不是最近的规格，如需最近的封装外型信息，请查询 www.maxim-ic.com.cn/packages。)
COMMON DIMENSIONS
SYMBOL
A
MIN.
0.70
0.80
D
2.90
3.10
E
2.90
3.10
A1
L
0.00
0.05
k
MAX.
0.40
0.20
0.25 MIN.
A2
0.20 REF.
PACKAGE VARIATIONS
PKG. CODE
N
D2
E2
e
JEDEC SPEC
b
[(N/2)-1] x e
T633-1
6
1.50±0.10
2.30±0.10
0.95 BSC
MO229 / WEEA
0.40±0.05
1.90 REF
T833-1
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
T1033-1
10
1.50±0.10
2.30±0.10
0.50 BSC
MO229 / WEED-3
0.25±0.05
2.00 REF
T1433-1
14
1.70±0.10
2.30±0.10
0.40 BSC
----
0.20±0.03
2.40 REF
T1433-2
14
1.70±0.10
2.30±0.10
0.40 BSC
----
0.20±0.03
2.40 REF
PACKAGE OUTLINE, 6, 8, 10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
21-0137
F
2
2
MAXIM 北京办事处
北京 8328 信箱 邮政编码 100083
免费电话：800 810 0310
电话：010-6201 0598
传真：010-6201 0298
Maxim不对 Maxim产品以外的任何电路使用负责，也不提供其专利许可。Maxim保留在任何时间、没有任何通报的前提下修改产品资料和规格的权利。
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
© 2004 Maxim Integrated Products
Printed USA
是 Maxim Integrated Products, Inc. 的注册商标。
MAX5417/MAX5418/MAX5419
_______________________________________________________________ 封装信息 (续 )
MAX5417, MAX5417L, MAX5417M, MAX5417N, MAX5417P, MAX5418, MAX5419 256抽头、非易失、 I²C接口数字电位器 - 概述
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Maxim > 产品 > 数字电位器(pot) > MAX5417, MAX5417L, MAX5417M, ...
MAX5417, MAX5417L, MAX5417M, MAX5417N, MAX5417P, MAX5418,
MAX5419
256抽头、非易失、 I²C接口数字电位器
业内尺寸最小的256抽头电位器，3mm x 3mm TDFN封装
概述 技术文档 定购信息 用户说明 (0) 所有内容 状况
状况：生产中。
概述
MAX5417/MAX5418/MAX5419为非易失性、线性变化的数字电位器，实现机械电
位器的功能，采用简单的2线数字接口就取代了机械调节，且允许控制多个器件。 完整的数据资料
每个器件具有分立电位器或可变电阻等相同功能，提供256级抽头。
提供更新的英文版数据资料
这些器件内置非易失性EEPROM，用来存储中心抽头的位置，以便在上电期间进
行初始化。快速模式的兼容I²C串行接口允许以400kbps的数据速率进行通讯，为
多数应用尽可能减小了电路板尺寸，简化了布线。每个器件提供四个工厂预置地
址之一(参阅完整数据资料中的选型指南)，和一个地址输入端，以实现总共8个唯
一地址的组合。
英文
下载 Rev. 3 (PDF, 288kB)
中文
下载 Rev. 2 (PDF, 536kB)
MAX5417/MAX5418/MAX5419提供三种标称电阻值：50kΩ (MAX5417)、100kΩ (MAX5418)及200kΩ (MAX5419)。标称
端对端的电阻温度系数为50ppm/°C，比例系数仅5ppm/°C。以上特性使这些器件尤其适合于要求低温漂系数的可变电阻
应用，如可编程增益放大器电路结构。
MAX5417/MAX5418/MAX5419采用3mm x 3mm、8引脚TDFN封装，工作在-40°C至+85°C的扩展级工作范围内。
现备有评估板：MAX5417LEVCMODU, MAX5417LEVKIT
关键特性
应用/使用
上电时由非失性存储器设定中心抽头位置
微型3mm x 3mm、8引脚TDFN封装
35ppm/°C端到端电阻温度系数
5ppm/°C比例温度系数
50kΩ/100kΩ/200kΩ电阻值
快速的兼容I²C串行接口
500nA (典型值)的静态电源电流
单电源工作：+2.7V至+5.25V
256抽头位置
在分压器模式下，达到±0.5 LSB的DNL
在分压器模式下，达到±0.5 LSB的INL
可提供评估板
Key Specifications: Digital Potentiometers
Temp.
http://china.maxim-ic.com/datasheet/index.mvp/id/4205[2010-8-19 9:06:35]
液晶显示器(LCD)对比度控制
低偏差可编程增益放大器
替代机械电位器
音量控制
MAX5417, MAX5417L, MAX5417M, MAX5417N, MAX5417P, MAX5418, MAX5419 256抽头、非易失、 I²C接口数字电位器 - 概述
Part
Control
Taper POTs
Number
Interface
R ENDWiper
Steps TO-END
Memory
(kΩ)
Smallest
ICC
Wiper
Coeff.
Available
Pckg. Price
Resistance @5V
(ppm/
2
(Ω)
(µA)
(mm )
°C)
typ
MAX5418 MAX5419 Linear
typ
max
max w/pins
$1.25
@1k
100
1
2-Wire
Serial
NonVolatile
MAX5417 256
200
50
50
查看所有Digital Potentiometers (128)
图表
功能框图
相关产品
MAX5417LEVCMODU, MAX5417_、MAX5418_、MAX5419_评估板/评估系统
MAX5417LEVKIT
类似产品：浏览其它类似产品线
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更多信息
顶标
MAX5417L
顶标
MAX5417M
顶标
MAX5417N
顶标
MAX5417P
顶标
MAX5417L
顶标
MAX5417M
顶标
MAX5417N
顶标
MAX5417P
顶标
MAX5417L
顶标
MAX5417M
顶标
MAX5417N
顶标
MAX5417P
顶标
MAX5417L
顶标
MAX5417M
顶标
MAX5417N
http://china.maxim-ic.com/datasheet/index.mvp/id/4205[2010-8-19 9:06:35]
See
Notes
325
1
9.6
$1.25
@1k
$1.16
@5k
MAX5417, MAX5417L, MAX5417M, MAX5417N, MAX5417P, MAX5418, MAX5419 256抽头、非易失、 I²C接口数字电位器 - 概述
顶标
MAX5417P
顶标
MAX5417L
顶标
MAX5417M
顶标
MAX5417N
顶标
MAX5417P
顶标
MAX5418L
顶标
MAX5418M
顶标
MAX5418N
顶标
MAX5418P
顶标
MAX5419L
顶标
MAX5419M
顶标
MAX5419N
顶标
MAX5419P
新品发布
[ 2004-03-29 (English only) ]
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参考文献： 19- 3185 Rev. 3; 2009- 04- 24
本页最后一次更新: 2009- 10- 08
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© 2010 Maxim Integrated Products版权所有
http://china.maxim-ic.com/datasheet/index.mvp/id/4205[2010-8-19 9:06:35]
19-3185; Rev 4; 4/10
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
Features
o Power-On Recall of Wiper Position from
Nonvolatile Memory
o Tiny 3mm x 3mm 8-Pin TDFN Package
o 35ppm/°C End-to-End Resistance Temperature
Coefficient
o 5ppm/°C Ratiometric Temperature Coefficient
o 50kΩ/100kΩ/200kΩ Resistor Values
o Fast I2C-Compatible Serial Interface
o 500nA (typ) Static Supply Current
o Single-Supply Operation: +2.7V to +5.25V
o 256 Tap Positions
o ±0.5 LSB DNL in Voltage-Divider Mode
o ±0.5 LSB INL in Voltage-Divider Mode
Functional Diagram
H
VDD
GND
8-BIT
SHIFT
REGISTER
8
8-BIT 8
LATCH
256256
POSITION
DECODER
W
L
SDA
SCL
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable-Gain Amplifiers
Volume Control
Liquid-Crystal Display (LCD) Contrast Control
I2C
INTERFACE
A0
POR
8-BIT
NV
MEMORY
MAX5417
MAX5418
MAX5419
Ordering Information/Selector Guide
PART
MAX5417LETA+
2
TEMP RANGE
I C ADDRESS
R (kΩ)
-40°C to +85°C
010100A0
50
8 TDFN-EP**
PIN-PACKAGE
TOP MARK
AIB
ALS
MAX5417META+
-40°C to +85°C
010101A0
50
8 TDFN-EP**
MAX5417NETA+
-40°C to +85°C
010110A0
50
8 TDFN-EP**
ALT
MAX5417PETA+
MAX5418LETA+
-40°C to +85°C
-40°C to +85°C
010111A0
010100A0
50
100
8 TDFN-EP**
8 TDFN-EP**
ALU
AIC
MAX5418META+
-40°C to +85°C
010101A0
100
8 TDFN-EP**
ALV
MAX5418NETA+
-40°C to +85°C
010110A0
100
8 TDFN-EP**
ALW
MAX5418PETA+
MAX5419LETA+
-40°C to +85°C
-40°C to +85°C
010111A0
010100A0
100
200
8 TDFN-EP**
8 TDFN-EP**
ALX
AID
MAX5419META+
-40°C to +85°C
010101A0
200
8 TDFN-EP**
ALY
MAX5419NETA+
-40°C to +85°C
010110A0
200
8 TDFN-EP**
ALZ
010111A0
200
8 TDFN-EP**
AMA
MAX5419PETA+
-40°C to +85°C
+Denotes a lead(Pb)-free/RoHS-compliant package.
**Exposed pad.
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX5417/MAX5418/MAX5419
General Description
The MAX5417/MAX5418/MAX5419 nonvolatile, lineartaper, digital potentiometers perform the function of a
mechanical potentiometer by replacing the mechanics
with a simple 2-wire digital interface, allowing communication with multiple devices. Each device performs the
same function as a discrete potentiometer or variable
resistor and has 256 tap points.
The devices feature an internal, nonvolatile EEPROM
used to store the wiper position for initialization during
power-up. The fast-mode I2C-compatible serial interface
allows communication at data rates up to 400kbps, minimizing board space and reducing interconnection complexity in many applications. Each device is available with
one of four factory-preset addresses (see the Selector
Guide) and features an address input for a total of eight
unique address combinations.
The MAX5417/MAX5418/MAX5419 provide three nominal resistance values: 50kΩ (MAX5417), 100kΩ
(MAX5418), or 200kΩ (MAX5419). The nominal resistor
temperature coefficient is 35ppm/°C end-to-end, and
only 5ppm/°C ratiometric. This makes the devices ideal
for applications requiring a low-temperature-coefficient
variable resistor, such as low-drift, programmable gainamplifier circuit configurations.
The MAX5417/MAX5418/MAX5419 are available in a
3mm x 3mm 8-pin TDFN package, and are specified
over the extended -40°C to +85°C temperature range.
MAX5417/MAX5418/MAX5419
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS
VDD to GND ...........................................................-0.3V to +6.0V
All Other Pins to GND.................................-0.3V to (VDD + 0.3V)
Maximum Continuous Current into H, L, and W
MAX5417......................................................................±1.3mA
MAX5418......................................................................±0.6mA
MAX5419......................................................................±0.3mA
Continuous Power Dissipation (TA = +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +2.7V to +5.25V, H = VDD, L = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC PERFORMANCE (VOLTAGE-DIVIDER MODE)
Resolution
256
Taps
Integral Nonlinearity
INL
(Note 1)
±0.5
LSB
Differential Nonlinearity
DNL
(Note 1)
±0.5
LSB
End-to-End Temperature
Coefficient
TCR
35
ppm/°C
5
ppm/°C
MAX5417_, 50Ω
MAX5418_, 100kΩ
MAX5419_, 200kΩ
-0.6
-0.3
-0.15
LSB
MAX5417_, 50kΩ
0.6
MAX5418_, 100kΩ
MAX5419_, 200kΩ
0.3
0.15
Ratiometric Temperature
Coefficient
Full-Scale Error
Zero-Scale Error
LSB
DC PERFORMANCE (VARIABLE-RESISTOR MODE)
Integral Nonlinearity
(Note 2)
INL
VDD = 3V
±3
VDD = 5V
±1.5
VDD = 3V, MAX5417_, 50kΩ
Differential Nonlinearity
(Note 2)
DNL
-1
LSB
+2
VDD = 3V, MAX5418_, 100kΩ
±1
VDD = 3V, MAX5419_, 200kΩ
±1
VDD = 5V
±1
LSB
DC PERFORMANCE (RESISTOR CHARACTERISTICS)
Wiper Resistance
RW
Wiper Capacitance
CW
VDD = 3V to 5.25V (Note 3)
2
RHL
675
10
MAX5417_
End-to-End Resistance
325
37.5
50
62.5
MAX5418_
75
100
125
MAX5419_
150
200
250
_______________________________________________________________________________________
Ω
pF
kΩ
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
(VDD = +2.7V to +5.25V, H = VDD, L = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.)
DIGITAL INPUTS
Input High Voltage (Note 4)
VIH
VDD = 3.4V to 5.25V
VDD < 3.4V
2.4
V
0.7 x VDD
Input Low Voltage
VIL
VDD = 2.7V to 5.25V (Note 4)
0.8
V
Low-Level Output Voltage
VOL
3mA sink current
0.4
V
±1
µA
Input Leakage Current
ILEAK
Input Capacitance
5
pF
DYNAMIC CHARACTERISTICS
MAX5417_
Wiper -3dB Bandwidth (Note 5)
100
MAX5418_
50
MAX5419_
25
TA = +85°C
50
TA = +25°C
200,000
TA = +85°C
50,000
kHz
NONVOLATILE MEMORY
Data Retention
Endurance
Years
Stores
POWER SUPPLY
Power-Supply Voltage
Standby Current
VDD
IDD
Programming Current
2.70
Digital inputs = VDD or GND,
TA = +25°C
During nonvolatile write;
digital inputs = VDD or GND (Note 6)
5.25
V
0.5
1
µA
200
400
µA
TIMING CHARACTERISTICS
(VDD = +2.7V to +5.25V, H = VDD, L = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA =
+25°C. See Figures 1 and 2.) (Note 7)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SECTION
MAX5417_
Wiper Settling Time (Note 8)
tIL
500
MAX5418_
600
MAX5419_
1000
ns
DIGITAL SECTION
SCL Clock Frequency
fSCL
400
kHz
Setup Time for START Condition
tSU-STA
0.6
µs
Hold Time for START Condition
tHD-STA
0.6
µs
CLK High Time
tHIGH
0.6
µs
CLK Low Time
tLOW
1.3
µs
_______________________________________________________________________________________
3
MAX5417/MAX5418/MAX5419
ELECTRICAL CHARACTERISTICS (continued)
MAX5417/MAX5418/MAX5419
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
TIMING CHARACTERISTICS (continued)
(VDD = +2.7V to +5.25V, H = VDD, L = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA =
+25°C. See Figures 1 and 2.) (Note 7)
PARAMETER
SYMBOL
CONDITIONS
MIN
Data Setup Time
tSU-DAT
100
Data Hold Time
tHD-DAT
0
TYP
MAX
UNITS
0.9
µs
ns
ns
SDA, SCL Rise Time
tR
300
SDA, SCL Fall Time
tF
300
Setup Time for STOP Condition
tSU-STO
Bus Free Time Between STOP
and START Condition
tBUF
Minimum power-up rate = 0.2V/ms
Pulse Width of Spike Suppressed
tSP
Maximum Capacitive Load for
Each Bus Line
CB
(Note 9)
Write NV Register Busy Time
tBUSY
(Note 10)
ns
0.6
µs
1.3
µs
50
400
ns
pF
12
ms
Note 1: The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = VDD and L = GND. The
wiper terminal is unloaded and measured with a high-input-impedance voltmeter.
Note 2: The DNL and INL are measured with the potentiometer configured as a variable resistor. H is unconnected and L = GND.
For the 5V condition, the wiper terminal is driven with a source current of 80µA for the 50kΩ configuration, 40µA for the
100kΩ configuration, and 20µA for the 200kΩ configuration. For the 3V condition, the wiper terminal is driven with a source
current of 40µA for the 50kΩ configuration, 20µA for the 100kΩ configuration, and 10µA for the 200kΩ configuration.
Note 3: The wiper resistance is measured using the source currents given in Note 2. For operation to VDD = 2.7V, see Wiper
Resistance vs. Temperature in the Typical Operating Characteristics.
Note 4: The device draws higher supply current when the digital inputs are driven with voltages between (VDD - 0.5V) and (GND +
0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.
Note 5: Wiper at midscale with a 10pF load (DC measurement). L = GND; an AC source is applied to H; and the W output is measured. A 3dB bandwidth occurs when the AC W/H value is 3dB lower than the DC W/H value.
Note 6: The programming current operates only during power-up and NV writes.
Note 7: SCL clock period includes rise and fall times tR and tF. All digital input signals are specified with tR = tF = 2ns and timed
from a voltage level of (VIL + VIH) / 2.
Note 8: Wiper settling time is the worst-case 0% to 50% rise time measured between consecutive wiper positions. H = VDD,
L = GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see the Typical Operating
Characteristics for the tap-to-tap switching transient).
Note 9: An appropriate bus pullup resistance must be selected depending on board capacitance. Refer to the document linked to
this web address: www.semiconductors.philips.com/acrobat/literature/9398/39340011.pdf.
Note 10: The idle time begins from the initiation of the stop pulse.
4
_______________________________________________________________________________________
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
INL vs. TAP POSITION
0.05
0
-0.05
-0.10
0.10
0.05
0
-0.05
-0.10
-0.15
-0.15
-0.20
-0.20
-0.25
32
64
96
500
400
300
200
100
-0.25
0
128 160 192 224 256
0
32
TAP POSITION
64
96
128 160 192 224 256
0
32
64
TAP POSITION
96
128 160 192 224 256
TAP POSITION
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
WIPER TRANSIENT AT POWER-ON
MAX5417 toc04
W
1V/div
CL = 10pF
TAP = 128
H = VDD
MAX5417 toc05
1.0
END-TO-END RESISTANCE % CHANGE
VDD
2V/div
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
4µs/div
-40
-15
10
35
85
60
TEMPERATURE (°C)
STANDBY SUPPLY CURRENT
vs. TEMPERATURE
WIPER RESISTANCE vs. TEMPERATURE
700
600
RESISTANCE (Ω)
0.8
0.6
0.4
0.2
MAX5417 toc07
1.0
MAX5417 toc06
0
VDD = 2.7V
ISRC = 50µA
600
RESISTANCE (Ω)
RESISTANCE INL (LSB)
0.15
0.10
STANDBY SUPPLY CURRENT (µA)
RESISTANCE DNL (LSB)
0.15
VOLTAGE-DIVIDER MODE
0.20
700
MAX5417 toc02
MAX5417 toc01
VOLTAGE-DIVIDER MODE
0.20
WIPER RESISTANCE vs. TAP POSITION
0.25
MAX5417 toc03
DNL vs. TAP POSITION
0.25
VDD = 2.7V
500
400
VDD = 3.0V
300
VDD = 4.5V
200
VDD = 5.25V
100
0
0
-40
-15
10
35
TEMPERATURE (°C)
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
_______________________________________________________________________________________
5
MAX5417/MAX5418/MAX5419
Typical Operating Characteristics
(VDD = +5V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VDD = +5V, TA = +25°C, unless otherwise noted.)
INL vs. TAP POSITION
(MAX5417)
THD+N RESPONSE
10
400
1:1 RATIO
20Hz TO 20kHz BANDPASS
THD+N (%)
1
300
0.1
200
0.01
100
0.001
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 50µA
2.5
RESISTANCE INL (LSB)
500
3.0
MAX5417 toc09
100
MAX5417 toc08
600
2.0
MAX5417 toc10
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
SUPPLY CURRENT (µA)
1.5
1.0
0.5
0
-0.5
0.0001
0
1
2
3
5
4
-1.0
10
DIGITAL INPUT VOLTAGE (V)
100
1k
10k
100k
96
1.00
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 10µA
0.75
0.50
INL (LSB)
1.0
INL (LSB)
64
128 160 192 224 256
INL vs. TAP POSITION
(MAX5419)
MAX5417 toc11
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 20µA
1.5
32
TAP POSITION
INL vs. TAP POSITION
(MAX5418)
2.0
0
FREQUENCY (Hz)
0.5
MAX5417 toc12
0
0.25
0
-0.25
0
-0.50
-0.5
-0.75
-1.00
32
64
96
0
128 160 192 224 256
32
64
96
128 160 192 224 256
TAP POSITION
TAP POSITION
DNL vs. TAP POSITION
(MAX5417)
DNL vs. TAP POSITION
(MAX5418)
0.5
VARIABLE-RESISTOR MODE
0.4
0.3
MAX5417 toc13
0
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 20µA
0.2
0.3
MAX5417 toc14
-1.0
0.1
0.2
DNL (LSB)
DNL (LSB)
MAX5417/MAX5418/MAX5419
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
0.1
0
0
-0.1
-0.1
-0.2
-0.2
-0.3
0
32
64
96
128 160 192 224 256
TAP POSITION
6
-0.3
0
32
64
96
128 160 192 224 256
TAP POSITION
_______________________________________________________________________________________
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
MIDSCALE WIPER RESPONSE vs. FREQUENCY
(MAX5417)
-5
-0.1
-0.2
CL = 10pF
-10
-15
CL = 50pF
-20
-25
-0.3
32
64
96
CL = 10pF
-10
-15
CL = 50pF
-20
-30
1
128 160 192 224 256
MAX5418
TAP = 128
-5
-25
-30
TAP POSITION
10
100
1000
1
FREQUENCY (kHz)
MIDSCALE WIPER RESPONSE vs. FREQUENCY
(MAX5419)
10
100
1000
FREQUENCY (kHz)
TAP-TO-TAP SWITCHING TRANSIENT
(MAX5417)
MAX5417 toc19
0
MAX5417 toc18
0
0
WIPER RESPONSE (dB)
WIPER RESPONSE (dB)
0
-5
MAX5419
TAP = 128
-10
WIPER RESPONSE (dB)
DNL (LSB)
0.1
MAX5417
TAP = 128
MAX5417 toc16
VARIABLE-RESISTOR MODE
VDD = 2.7V
ISRC = 10µA
0.2
0
MAX5417 toc15
0.3
MIDSCALE WIPER RESPONSE vs. FREQUENCY
(MAX5418)
MAX5417 toc17
DNL vs. TAP POSITION
(MAX5419)
CL = 10pF
SDA
2V/div
-15
-20
CL = 50pF
-25
MAX5417
CL = 10pF
FROM TAP 127
TO TAP 128
H = VDD
-30
-35
-40
W
10mV/div
-45
1
10
100
1000
1µs/div
FREQUENCY (kHz)
TAP-TO-TAP SWITCHING TRANSIENT
(MAX5418)
TAP-TO-TAP SWITCHING TRANSIENT
(MAX5419)
MAX5417 toc20
MAX5417 toc21
SDA
2V/div
SDA
2V/div
W
10mV/div
W
10mV/div
MAX5418
CL = 10pF
FROM TAP 127
TO TAP 128
H = VDD
1µs/div
MAX5419
CL = 10pF
FROM TAP 127
TO TAP 128
H = VDD
1µs/div
_______________________________________________________________________________________
7
MAX5417/MAX5418/MAX5419
Typical Operating Characteristics (continued)
(VDD = +5V, TA = +25°C, unless otherwise noted.)
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
MAX5417/MAX5418/MAX5419
Pin Description
PIN
NAME
FUNCTION
1
VDD
Power-Supply Input. 2.7V to 5.25V voltage range. Bypass with a 0.1µF capacitor from VDD to GND.
2
SCL
I2C-Interface Clock Input
3
SDA
I2C-Interface Data Input
4
A0
5
GND
Address Input. Sets the A0 bit in the device ID address.
6
L
Low Terminal
7
W
Wiper Terminal
8
H
High Terminal
—
EP
Exposed Pad. Internally connected to GND. Connect to a large ground plane to maximize thermal
performance. Not intended as an electrical point.
Ground
tR
tF
SDA
tSU-DAT
tHD-DAT
tLOW
tBUF
tHD-STA
tSU-STA
tSU-STO
SCL
tHIGH
tHD-STA
tF
tR
S
Sr
A
P
S
PARAMETERS ARE MEASURED FROM 30% TO 70%.
Figure 1. I2C Serial-Interface Timing Diagram
Detailed Description
VDD
IOL = 3mA
VOUT
SDA
400pF
IOH = 0mA
Figure 2. Load Circuit
8
The MAX5417/MAX5418/MAX5419 contain a resistor
array with 255 resistive elements. The MAX5417 has a
total end-to-end resistance of 50kΩ, the MAX5418 has
an end-to-end resistance of 100kΩ, and the MAX5419
has an end-to-end resistance of 200kΩ. The
MAX5417/MAX5418/MAX5419 allow access to the high,
low, and wiper terminals for a standard voltage-divider
configuration. H, L, and W can be connected in any
desired configuration as long as their voltages fall
between GND and VDD.
A simple 2-wire I2C-compatible serial interface moves
the wiper among the 256 tap points. A nonvolatile memory stores the wiper position and recalls the stored wiper
position in the nonvolatile memory upon power-up. The
nonvolatile memory is guaranteed for 50 years for wiper
data retention and up to 200,000 wiper store cycles.
_______________________________________________________________________________________
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
Digital Interface
The MAX5417/MAX5418/MAX5419 feature an internal,
nonvolatile EEPROM that stores the wiper state for initialization during power-up. The shift register decodes
the control and address bits, routing the data to the
proper memory registers. Data can be written to a
volatile memory register, immediately updating the
wiper position, or data can be written to a nonvolatile
register for storage.
The volatile register retains data as long as the device
is powered. Once power is removed, the volatile register is cleared. The nonvolatile register retains data even
after power is removed. Upon power-up, the power-on
reset circuitry controls the transfer of data from the nonvolatile register to the volatile register.
Start and Stop Conditions
Both SCL and SDA remain high when the interface is
not busy. A master signals the beginning of a transmission with a START condition by transitioning SDA from
high to low while SCL is high. When the master has finished communicating with the slave, it issues a STOP
condition by transitioning the SDA from low to high
while SCL is high. The bus is then free for another
transmission (Figure 3).
SDA
Bit Transfer
One data bit is transferred during each clock pulse.
The data on the SDA line must remain stable while SCL
is high (Figure 5).
SCL
S
P
START
CONDITION
STOP
CONDITION
Figure 3. Start and Stop Conditions
SDA
0
1
0
1
MSB
0*
0*
A0
NOP/W
ACK
LSB
SCL
*See the Ordering Information/Selector Guide section for other address options.
Figure 4. Slave Address
SMBus is a trademark of Intel Corporation.
_______________________________________________________________________________________
9
MAX5417/MAX5418/MAX5419
Serial Addressing
The MAX5417/MAX5418/MAX5419 operate as a slave
that receives data through an I2C- and SMBus™-compatible 2-wire interface. The interface uses a serial data
access (SDA) line and a serial clock line (SCL) to
achieve communication between master(s) and
slave(s). A master, typically a microcontroller, initiates
all data transfers to the MAX5417/MAX5418/MAX5419,
and generates the SCL clock that synchronizes the
data transfer (Figure 1).
The MAX5417/MAX5418/MAX5419 SDA line operates
as both an input and an open-drain output. A pullup
resistor, typically 4.7kΩ, is required on the SDA bus.
The MAX5417/MAX5418/MAX5419 SCL operates only
as an input. A pullup resistor, typically 4.7kΩ, is
required on the SCL bus if there are multiple masters
on the 2-wire interface, or if the master in a single-master system has an open-drain SCL output.
Each transmission consists of a START (S) condition
(Figure 3) sent by a master, followed by the
MAX5417/MAX5418/MAX5419 7-bit slave address plus
the 8th bit (Figure 4), 1 command byte (Figure 7) and 1
data byte, and finally a STOP (P) condition (Figure 3).
Analog Circuitry
The MAX5417/MAX5418/MAX5419 consist of a resistor
array with 255 resistive elements; 256 tap points are
accessible to the wiper, W, along the resistor string
between H and L. The wiper tap point is selected by
programming the potentiometer through the 2-wire (I2C)
interface. Eight data bits, an address byte, and a control byte program the wiper position. The H and L terminals of the MAX5417/MAX5418/MAX5419 are similar to
the two end terminals of a mechanical potentiometer.
The MAX5417/MAX5418/MAX5419 feature power-on
reset circuitry that loads the wiper position from nonvolatile memory at power-up.
MAX5417/MAX5418/MAX5419
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
Table 1. MAX5417/MAX5418/MAX5419 Address Codes
ADDRESS BYTE
PART SUFFIX
A6
A5
A4
A3
A2
A1
A0
NOP/W
L
0
1
0
1
0
0
0
NOP/W
L
0
1
0
1
0
0
1
NOP/W
M
0
1
0
1
0
1
0
NOP/W
M
0
1
0
1
0
1
1
NOP/W
N
0
1
0
1
1
0
0
NOP/W
N
0
1
0
1
1
0
1
NOP/W
P
0
1
0
1
1
1
0
NOP/W
P
0
1
0
1
1
1
1
NOP/W
Acknowledge
The acknowledge bit is a clocked 9th bit that the recipient
uses to handshake receipt of each byte of data (Figure
6). Thus, each byte transferred effectively requires 9 bits.
The master generates the 9th clock pulse, and the recipient pulls down SDA during the acknowledge clock pulse,
so the SDA line is stable low during the high period of the
clock pulse. When the master transmits to the
MAX5417/MAX5418/MAX5419, the devices generate the
acknowledge bit because the MAX5417/MAX5418/
MAX5419 are the recipients.
Slave Address
The MAX5417/MAX5418/MAX5419 have a 7-bit-long
slave address (Figure 4). The 8th bit following the 7-bit
slave address is the NOP/W bit. Set the NOP/W bit low for
a write command and high for a no-operation command.
The MAX5417/MAX5418/MAX5419 are available in one
of four possible slave addresses (Table 1). The first 4
bits (MSBs) of the MAX5417/MAX5418/MAX5419 slave
addresses are always 0101. The next 2 bits are factory
programmed (see Table 1). Connect the A0 input to
either GND or V DD to toggle between two unique
device addresses for a part. Each device must have a
unique address to share the bus. Therefore, a maximum of eight MAX5417/MAX5418/MAX5419 devices
can share the same bus.
CLOCK PULSE FOR
ACKNOWLEDGMENT
START
CONDITION
SDA
SCL
1
2
8
NOT ACKNOWLEDGE
SCL
SDA
DATA STABLE,
DATA VALID
Figure 5. Bit Transfer
10
CHANGE OF
DATA ALLOWED
ACKNOWLEDGE
Figure 6. Acknowledge
______________________________________________________________________________________
9
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
D14
D13
D12
D11
D10
D9
MAX5417/MAX5418/MAX5419
D15
CONTROL BYTE IS STORED ON RECEIPT OF STOP CONDITION
D8
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
S
SLAVE ADDRESS
0
CONTROL BYTE
A
A
P
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
NOP/W
Figure 7. Command Byte Received
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
HOW CONTROL BYTE AND DATA BYTE MAP INTO
MAX5417/MAX5418/MAX5419 REGISTERS
D15 D14 D13 D12 D11 D10
D9
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
D8
D7
D6
D5
D4
D3
D2
D1
D0
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
S
SLAVE ADDRESS
0
A
CONTROL BYTE
NOP/W
A
DATA BYTE
A
P
1 BYTE
Figure 8. Command and Single Data Byte Received
Message Format for Writing
A write to the MAX5417/MAX5418/MAX5419 consists of
the transmission of the device’s slave address with the
8th bit set to zero, followed by at least 1 byte of information (Figure 7). The 1st byte of information is the
command byte. The bytes received after the command
byte are the data bytes. The 1st data byte goes into the
internal register of the MAX5417/MAX5418/MAX5419 as
selected by the command byte (Figure 8).
Command Byte
Use the command byte to select the source and destination of the wiper data (nonvolatile or volatile memory
registers) and swap data between nonvolatile and
volatile memory registers (see Table 2).
Command Descriptions
VREG: The data byte writes to the volatile memory register and the wiper position updates with the data in the
volatile memory register.
NVREG: The data byte writes to the nonvolatile memory register. The wiper position is unchanged.
NVREGxVREG: Data transfers from the nonvolatile
memory register to the volatile memory register (wiper
position updates).
VREGxNVREG: Data transfers from the volatile memory register into the nonvolatile memory register.
______________________________________________________________________________________
11
MAX5417/MAX5418/MAX5419
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
Table 2. Command Byte Summary
ADDRESS BYTE
SCL CYCLE
NUMBER
S
1
2
A6 A5
0
VREG
1
5
6
CONTROL BYTE
3
4
7
A4
A3
A2 A1
A0
0
1
A2 A1
A0
8
9
10
ACK
0
DATA BYTE
11
12
13
14
15
16
17
18
TX
NV
V
R3
R2
R1
R0
ACK
D7
D6
D5
D4
0
0
1
0
0
0
1
D7
D6
D5
D4
0
19
20
21
22
23
24
25
26
27
D3
D2
D1
D0
ACK
D3
D2
D1
D0
NVREG
0
1
0
1
A2 A1
A0
0
0
0
1
0
0
0
0
1
D7
D6
D5
D4
D3
D2
D1
D0
NVREGxVREG
0
1
0
1
A2 A1
A0
0
0
1
1
0
0
0
0
1
X
X
X
X
X
X
X
X
VREGxNVREG
0
1
0
1
A2 A1
A0
0
0
1
0
1
0
0
0
1
X
X
X
X
X
X
X
X
P
X = Don’t care.
Nonvolatile Memory
Positive LCD Bias Control
The internal EEPROM consists of an 8-bit nonvolatile
register that retains the value written to it before the
device is powered down. The nonvolatile register is
programmed with the midscale value at the factory.
Figures 9 and 10 show an application where the voltage-divider or variable resistor is used to make an
adjustable, positive LCD bias voltage. The op amp provides buffering and gain to the resistor-divider network
made by the potentiometer (Figure 9) or to a fixed
resistor and a variable resistor (see Figure 10).
Power-Up
Upon power-up, the MAX5417/MAX5418/MAX5419
load the data stored in the nonvolatile memory register
into the volatile memory register, updating the wiper
position with the data stored in the nonvolatile memory
register. This initialization period takes 10µs.
Standby
The MAX5417/MAX5418/MAX5419 feature a low-power
standby. When the device is not being programmed, it
goes into standby mode and power consumption is
typically 500nA.
Programmable Filter
Figure 11 shows the configuration for a 1st-order programmable filter. The gain of the filter is adjusted by
R2, and the cutoff frequency is adjusted by R3. Use the
following equations to calculate the gain (G) and the
3dB cutoff frequency (fC):
R1
R2
1
fC =
2π × R3 × C
G = 1+
Applications Information
The MAX5417/MAX5418/MAX5419 are intended for circuits requiring digitally controlled adjustable resistance, such as LCD contrast control (where voltage
biasing adjusts the display contrast), or for programmable filters with adjustable gain and/or cutoff frequency.
5V
5V
H
30V
30V
W
MAX5417
MAX5418
MAx5419
L
VOUT
H
VOUT
MAX5417
MAX5418
MAX5419
W
L
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
12
Figure 10. Positive LCD Bias Control Using a Variable Resistor
______________________________________________________________________________________
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
VIN
5V
L
H
R3
C
MAX5417
MAX5418
MAX5419
VOUT
7
3
1
R1
8
6
MAX410
2
H
MAX5417
MAX5418
MAX5419
4
W
R2
W
-5V
L
H
R1
L
Figure 13. Offset Voltage and Gain Adjustment Circuit
Figure 11. Programmable Filter
Pin Configuration
TOP VIEW
+5V
+
VIN
VDD 1
V0 REF
OUT
H
SCL 2
MAX6160
ADJ
MAX5417
MAX5418
MAX5419
SDA 3
W
GND
8 H
7 W
MAX5417
MAX5418
MAX5419
A0 4
6 L
5 GND
L
TDFN
Figure 12. Adjustable Voltage Reference
Adjustable Voltage Reference
Figure 12 shows the MAX5417/MAX5418/MAX5419 used
as the feedback resistors in multiple adjustable voltagereference applications. Independently adjust the output
voltage of the MAX6160 from 1.23V to VIN - 0.2V by
changing the wiper positions of the MAX5417/
MAX5418/MAX5419.
Offset Voltage and Gain Adjustment
Connect the high and low terminals of one potentiometer
of a MAX5417 between the NULL inputs of a MAX410
and the wiper to the op amp’s positive supply to nullify
the offset voltage over the operating temperature range.
Install the other potentiometer in the feedback path to
adjust the gain of the MAX410 (see Figure 13).
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in
the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
8 TDFN-EP
T833-1
21-0137
______________________________________________________________________________________
13
MAX5417/MAX5418/MAX5419
W
MAX5417/MAX5418/MAX5419
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
Revision History
REVISION
NUMBER
REVISION
DATE
0
2/04
Initial release
—
1
4/04
Adding future product
—
2
8/04
Adding new part
3
3/09
Changes to add details about exposed pad, corrections to Table 2, style edits
1, 8, 12–15
4
4/10
Added lead-free packages to Ordering Information, added Soldering Temperature to
Absolute Maximum Ratings, corrected Conditions for Differential Linearity in Electrical
Characteristics, corrected A0 in Pin Description, corrected Figures 12 and 13
1, 2, 8, 13
DESCRIPTION
PAGES
CHANGED
—
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2010 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.