MAXIM MAX5451EUD

19-1997; Rev 0; 4/01
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
The MAX5450–MAX5455 are available in 10-pin µMAX
and 14-pin TSSOP packages. Each device is guaranteed over the extended–industrial temperature range
(-40°C to +85°C).
Applications
Mechanical Potentiometer Replacement
Features
♦ Small-Footprint Packages
10-Pin µMAX (MAX5450/MAX5452/MAX5454)
14-Pin TSSOP (MAX5451/MAX5453/MAX5455)
♦ 256-Tap Positions
♦ Independent Up/Down Potentiometer Controls
(MAX5451/MAX5453/MAX5455)
♦ Ultra-Low 0.1µA Supply Current
♦ +2.7V to +5.5V Single-Supply Operation
♦ Low 35ppm/°C End-to-End Temperature
Coefficient
♦ Power-On Reset Sets Wiper to Midscale
(Position 127)
♦ Glitchless Switching Between the Resistor Taps
♦ 10kΩ, 50kΩ, 100kΩ Resistance Values
Ordering Information
PART
PINPACKAGE
TEMP. RANGE
R (kΩ)
MAX5450EUB
-40°C to +85°C
10 µMAX
10
MAX5451EUD
-40°C to +85°C
14 TSSOP
10
MAX5452EUB
-40°C to +85°C
10 µMAX
50
MAX5453EUD
-40°C to +85°C
14 TSSOP
50
MAX5454EUB
-40°C to +85°C
10 µMAX
100
MAX5455EUD
-40°C to +85°C
14 TSSOP
100
Low-Drift Programmable-Gain Amplifier (PGA)
Volume Control
Pin Configurations
LCD Screen Adjustment
Adjustable Voltage References
TOP VIEW
Adjustable Linear Regulators
Programmable Filters, Delays, Time Constants
Impedance Matching
CS1 1
U/D
2
VDD
3
W1
4
L1
5
CS1 1
14 CS2
9
INC
U/D1
2
13 INC1
8
GND
U/D2
3
10 CS2
MAX5450
MAX5452
MAX5454
µMAX
7
W2
VDD 4
6
L2
W1 5
12 INC2
MAX5451
MAX5453
MAX5455
11 GND
10 W2
H1 6
9
H2
L1 7
8
L2
TSSOP
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX5450–MAX5455
General Description
The MAX5450–MAX5455 are a family of dual digital
potentiometers that perform the same function as a
mechanical potentiometer or variable resistor. The
MAX5451/MAX5453/MAX5455 have two 3-terminal
potentiometers and the MAX5450/MAX5452/MAX5454
have two 2-terminal variable resistors. The MAX5450–
MAX5455 operate from a +2.7V to +5.5V single-supply
voltage and use an ultra-low supply current of 0.1µA.
These devices consist of two fixed resistors each
with 256 digitally-controlled wiper contacts. The convenient power-on reset (POR) sets the wiper to midscale
position at power-up and the easy-to-use up/down
interface allows glitchless switching between
resistor taps. Six inputs control the 14-pin MAX5451/
MAX5453/MAX5455 potentiometers. Four inputs control
the 10-pin MAX5450/MAX5452/MAX5454 variable resistors.
The MAX5450–MAX5455 are ideal for applications
requiring digitally-controlled resistors. Three resistance
values are available: 10kΩ, 50kΩ, and 100kΩ. An endto-end resistor temperature coefficient of 35ppm/°C
and a ratiometric temperature coefficient of 5ppm/°C
make the MAX5450–MAX5455 excellent choices for
adjustable gain circuit requiring low-temperature drift
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS
VDD to GND ..............................................................-0.3V to +6V
CS_, INC_, and U/D_ to GND...................................-0.3V to +6V
H_, L_, W_ to GND ......................................-0.3V to (VDD +0.3V)
Maximum Continuous Current into H_, L_, and W_............±1mA
Continuous Power Dissipation (TA = +70°C)
10-Pin µMAX (derate 6.94mW/°C above +70°C) ..........555mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) ..........727mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°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 +5.5V, VH = VDD, VL = 0; TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C,
unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC PERFORMANCE (Voltage-Divider Mode, MAX5451/MAX5453/MAX5455 Only)
Resolution
N
Integral Nonlinearity
(Notes 1 and 2)
INL
Differential Nonlinearity
(Notes 1 and 2)
DNL
End-to-End Resistor Tempco
TCR
8
±1
VDD = +3V
±1
VDD = +5V
±1
VDD = +3V
±1
Ratiometric Resistor Tempco
MAX5451
Full-Scale Error
Zero-Scale Error
Bits
VDD = +5V
LSB
LSB
35
ppm/°C
5
ppm/°C
-8
MAX5453
-1.6
MAX5455
-0.8
MAX5451
+8
MAX5453
+1.6
MAX5455
+0.8
LSB
LSB
DC PERFORMANCE (Variable Resistor Mode)
Resolution
Integral Nonlinearity
(Notes 1 and 3)
N
8
VDD = +5V
INL
VDD = +3V
Differential Nonlinearity
(Notes 1 and 3)
DNL
Bits
MAX5450, MAX5451
±3
MAX5452–MAX5455
±1
MAX5450, MAX5451
±4.5
MAX5452–MAX5455
LSB
±2
VDD = +5V
±1
VDD = +3V
±1
LSB
DC PERFORMANCE (Resistor Characteristics)
Wiper Resistance (Note 4)
RW
Wiper Capacitance
CW
VDD = +5V
VDD = +3V
2
RHL
550
10
MAX5450, MAX5451
End-To-End Resistance
225
6.5
pF
10
12.5
MAX5452, MAX5453
32
50
62.5
MAX5454, MAX5455
60
100
125
_______________________________________________________________________________________
Ω
kΩ
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
(VDD = +2.7V to +5.5V, VH = VDD, VL = 0; TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C,
unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUTS (Note 5)
Input High Voltage
VIH
Input Low Voltage
VIL
0.7 x VDD
V
0.3 x VDD
Input Leakage Current
±1.0
Input Capacitance
5
V
µA
pF
TIMING CHARACTERISTICS (Analog)
Wiper-Settling Time
(Note 6)
tIW
MAX5451
0.5
MAX5453
1.2
MAX5455
1.8
µs
TIMING CHARACTERISTICS (Digital, Note 7, Figure 1)
Maximum INC Frequency
fMAX
7
CS to INC Setup Time
tCI
25
MHz
ns
CS to INC Hold Time
tIC
0
ns
INC Low Period
tIL
25
ns
INC High Period
tIH
25
ns
U/D to INC Setup
tDI
50
ns
U/D to INC Hold
tID
0
ns
Supply Voltage
VDD
2.7
Supply Current
IDD
POWER SUPPLIES
CS = INC = U/D = VDD
or GND
5.5
VDD = +5V
0.7
VDD = +2.7V
0.1
2
V
µA
Note 1: Linearity is defined in terms of the H_ to L_ code-dependent resistance.
Note 2: 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 an ideal voltmeter.
Note 3: The DNL and INL are measured with the potentiometer configured as a variable resistor. For the 3-terminal potentiometers
(MAX5451/MAX5453/MAX5455), H_ is unconnected and L_ = GND. For the 2-terminal potentiometers
(MAX5450/MAX5452/MAX5454), L_ = GND. At VDD = +5V, the wiper terminal is driven with a source current of 400µA for the
10kΩ configuration, 80µA for the 50kΩ configuration, and 40µA for the 100kΩ configuration. At VDD = +3V,
200µA/40µA/20µA for 10kΩ/50kΩ/100kΩ configuration, respectively.
Note 4: The wiper resistance is the worst value measured by injecting the currents given in Note 3 into W_ with L_ = GND. RW_ =
(VW_ - VH_) / IW_.
Note 5: Device draws higher supply current when digital inputs are driven with voltages between 0.3 x VDD and 0.7 x VDD. (See
Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.)
Note 6: 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 Tap-To-Tap Switching
Transient in the Typical Operating Characteristics).
Note 7: Digital timing is guaranteed by design.
_______________________________________________________________________________________
3
MAX5450–MAX5455
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(VDD = +5V, TA = +25°C, unless otherwise noted.)
240
220
VDD = +5V
200
VDD = +3V
320
300
280
VDD = +5V
260
240
220
180
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
320
300
280
260
240
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
WIPER VOLTAGE (V)
WIPER VOLTAGE (V)
WIPER RESISTANCE
vs. WIPER POSITION (10kΩ)
WIPER RESISTANCE
vs. WIPER POSITION (50kΩ)
WIPER RESISTANCE
vs. WIPER POSITION (100kΩ)
6
5
4
3
40
35
30
25
20
15
100
90
80
70
60
50
40
30
2
10
20
1
5
10
0
0
32
64
96
128 160 192 224 256
MAX5450/5 toc06
45
W-TO-L RESISTANCE (kΩ)
7
MAX5450/5 toc05
8
50
W-TO-L RESISTANCE (kΩ)
MAX5450/5 toc04
9
0
0
32
64
96
128 160 192 224 256
0
32
64
96
128 160 192 224 256
WIPER POSITION
WIPER POSITION
WIPER POSITION
VARIABLE RESISTOR DNL
vs. WIPER POSITION (10kΩ)
VARIABLE RESISTOR INL
vs. WIPER POSITION (MAX5451)
VARIABLE RESISTOR DNL
vs. WIPER POSITION (50kΩ)
0.30
0.05
0.20
0.10
0.00
-0.20
96
128 160 192 224 256
WIPER POSITION
0.02
0.01
-0.02
-0.30
64
0.03
-0.01
0.00
32
0.04
0.00
-0.10
-0.05
0.05
DNL (LSB)
0.10
MAX5450/5 toc09
0.40
INL (LSB)
0.15
0.06
MAX5450/5 toc08
0.50
MAX5450/5 toc07
0.20
0
VDD = +5V
WIPER VOLTAGE (V)
10
0
VDD = +3V
180
160
160
0
360
340
220
200
200
160
4
400
380
MAX5450/5 toc02
340
180
W-TO-L RESISTANCE (kΩ)
WIPER RESISTANCE
vs. WIPER VOLTAGE (100kΩ)
WIPER RESISTANCE (Ω)
VDD = +3V
260
360
WIPER RESISTANCE (Ω)
280
WIPER RESISTANCE (Ω)
380
MAX5450/5 toc01
300
WIPER RESISTANCE
vs. WIPER VOLTAGE (50kΩ)
MAX5450/5 toc03
WIPER RESISTANCE
vs. WIPER VOLTAGE (10kΩ)
DNL (LSB)
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
-0.03
0
32
64
96
128 160 192 224 256
WIPER POSITION
0
32
64
96
128 160 192 224 256
WIPER POSITION
_______________________________________________________________________________________
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
VARIABLE RESISTOR INL
vs. WIPER POSITION (MAX5453)
DNL (LSB)
-0.04
-0.06
-0.08
-0.10
-0.12
-0.14
-0.16
0
32
64
96
-0.20
0
32
64
128
160 192 224
256
0
64
0.10
0.02
0.06
256
0.05
0.00
-0.05
-0.10
0.00
160 192 224
0.07
DNL (LSB)
INL (LSB)
0.03
128
0.08
0.05
0.04
96
VOLTAGE-DIVIDER DNL
vs. WIPER POSITION (50kΩ)
MAX5450/5 toc14
0.15
0.01
0.04
0.03
0.02
0.01
0.00
-0.15
-0.01
-0.01
-0.20
-0.02
0
32
64
96
128
160 192 224
0
256
32
64
160 192 224
-0.02
256
0
32
64
0.07
0.06
0.05
0.04
0.03
0.02
0.10
0.00
-0.05
-0.10
0.00
-0.15
256
0.05
0.01
-0.10
160 192 224
0.15
INL (LSB)
DNL (LSB)
-0.05
128
VOLTAGE-DIVIDER INL
vs. WIPER POSITION (100kΩ)
0.05
0.00
96
WIPER POSITION
MAX5450/5 toc17
0.08
MAX5450/5 toc16
0.10
128
VOLTAGE-DIVIDER DNL
vs. WIPER POSITION (100kΩ)
VOLTAGE-DIVIDER INL
vs. WIPER POSITION (50kΩ)
0.15
96
WIPER POSITION
WIPER POSITION
INL (LSB)
32
WIPER POSITION
VOLTAGE-DIVIDER INL
vs. WIPER POSITION (10kΩ)
0.05
DNL (LSB)
96
WIPER POSITION
MAX5450/5 toc13
0.06
-0.05
-0.15
VOLTAGE-DIVIDER DNL
vs. WIPER POSITION (10kΩ)
0.07
0.00
-0.10
WIPER POSITION
0.08
MAX5450/5 toc12
0.05
0.05
0.04
0.03
0.02
0.01
0.00
-0.01
-0.02
128 160 192 224 256
0.10
MAX5450/5 toc18
INL (LSB)
-0.02
0.15
MAX5450/5 toc15
0.00
0.11
0.10
0.09
0.08
0.07
0.06
INL (LSB)
0.02
VARIABLE RESISTOR INL
vs. WIPER POSITION (MAX5455)
MAX5450/5 toc11
0.12
MAX5450/5 toc10
0.04
VARIABLE RESISTOR DNL
vs. WIPER POSITION (100kΩ)
-0.15
-0.01
-0.20
-0.20
-0.02
0
32
64
96
128
160 192 224
WIPER POSITION
256
0
32
64
96
128
160 192 224
WIPER POSITION
256
0
32
64
96
128
160 192 224
256
WIPER POSITION
_______________________________________________________________________________________
5
MAX5450–MAX5455
Typical Operating Characteristics (continued)
(VDD = +5V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VDD = +5V, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
1.2
VDD = 5V
0.1
IDD (mA)
1.0
0.8
0.6
VDD = 3V
0.01
VDD = +5V
0.8
SUPPLY CURRENT (µA)
DIGITAL INPUTS + VDD
MAX5450/5 toc20
1
MAX5450/5 toc19
1.4
1.0
0.6
0.4
VDD = +3V
0.4
0.2
0.001
0.2
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
0.0001
0
0
1
2
3
4
5
0
6
1
2
3
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
5
TEMPERATURE (°C)
10kΩ
0.15
50kΩ
0.10
0.05
MAX5450/5 toc23
MAX5455
W
10mV/div
100kΩ
0
TAP-TO-TAP SWITCHING TRANSIENT
MAX5450/5 toc22
0.20
END-TO-END RESISTANCE % CHANGE
4
DIGITAL INPUT VOLTAGE (V)
VDD (V)
MAX5453
50kΩ
-0.05
100kΩ
INC_
5V/div
-0.10
MAX5451
-0.15
-0.20
10kΩ
-0.25
-40
-20
0
20
40
60
80
1µs/div
TEMPERATURE (°C)
6
_______________________________________________________________________________________
MAX5450/5 toc21
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
IDD (µA)
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
PIN
MAX5451
MAX5453
MAX5455
MAX5450
MAX5452
MAX5454
NAME
1
1
CS1
Chip-Select Input of Resistor 1. Drive low to change wiper position W1
through INC and U/D.
—
2
U/D
Up/Down Control Input. With U/D low, a high-to-low INC transition
decrements wiper position. With U/D high, a high-to-low INC transition
increments wiper position.
2
—
U/D1
Up/Down Control Input of Resistor 1. With U/D1 low, a high-to-low INC1
transition decrements wiper position W1. With U/D1 high, a high-to-low
INC1 transition increments wiper position W1.
3
—
U/D2
Up/Down Control Input of Resistor 2. With U/D2 low, a high-to-low INC2
transition decrements wiper position W2. With U/D2 high, a high-to-low
INC2 transition increments wiper position W2.
4
3
VDD
Power Supply
5
4
W1
Wiper Terminal of Resistor 1
6
—
H1
High Terminal of Resistor 1
7
5
L1
Low Terminal of Resistor 1
8
6
L2
Low Terminal of Resistor 2
9
—
H2
High Terminal of Resistor 2
Wiper Terminal of Resistor 2
FUNCTION
10
7
W2
11
8
GND
Ground
—
9
INC
Wiper Increment Control Input. With CS1 low, a high-to-low transition
increments (U/D high) or decrements (U/D low) wiper position W1. This
applies similarly for CS2 and W2.
12
—
INC2
Wiper Increment Control Input. With CS2 low, a high-to-low transition
increments (U/D2 high) or decrements (U/D2 low) wiper position W2.
13
—
INC1
Wiper Increment Control Input. With CS1 low, a high-to-low transition
increments (U/D1 high) or decrements (U/D1 low) wiper position W1.
14
10
CS2
Chip-Select Input of Resistor 2. Drive low to change wiper position W2
through INC and U/D.
_______________________________________________________________________________________
7
MAX5450–MAX5455
Pin Description
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
CS_
tCI
tIC
tIL
INC_
tIH
tDI
U/D_
tID
tIW
W_
Figure 1. Digital Interface and Timing diagram
Detailed Description
The MAX5450–MAX5455 contain two independent
resistor arrays each with 255-resistive elements. 256tap points are accessible to the wiper along the resistor
arrays between H and L (Figure 2). Power-on reset circuitry sets the wiper to midscale (position 127) at
power-up.
Logic inputs CS, U/D, and INC determine the wiper
position of the MAX5450–MAX5455. With CS low and
U/D high, a high-to-low (falling edge) transition on INC,
increments the internal counter, which increases the
resistance between W and L. When both CS and U/D
are low, a high-to-low INC transition decrements the
internal counter, decreasing the resistance between W
and L (Figure 1). The wiper performs a make-beforebreak transition ensuring that there is never an open
circuit during a transition from one resistor tap to another. When the wiper is at either end (max/min) of the
resistor array, additional transitions in the direction of
the endpoint will not change the counter value (the
counter will not wrap around).
The MAX5450/MAX5452/MAX5454 are similar to the
MAX5451/MAX5453/MAX5455 except for internal connections. The MAX5450/MAX5452/MAX5454 internally
connect INC1 to INC2, U/D1 to U/D2, W1 to H1, and
W2 to H2 (Figures 3 and 4). The internal connections
configure the MAX5450/MAX5452/MAX5454 to be variable resistors.
8
Applications Information
The MAX5450–MAX5455 are ideal for adjustable voltage or adjustable gain circuits where accurate
adjustable resistances are required.
Adjustable Current to Voltage Converter
Figure 5 shows the MAX5450/MAX5452/MAX5454 with
a MAX4250 low-noise op amp to fine-tune a current to
voltage converter. The physical sizes of both devices
minimize circuit space.
Adjustable Gain Amplifier
Figures 6a and 6b shows the MAX5450–MAX5455 digitally adjusting the gain of the MAX4493 general-purpose, dual supply op amp. Figure 6a shows the
MAX5450/MAX5452/MAX5454 variable resistor in
series with a resistor to ground to form the adjustable
gain control. Figure 6b shows the MAX5451/MAX5453/
MAX5455 as a 3-terminal potentiometer. In these applications the low 5ppm/°C ratiometric tempco allows for
a very stable adjustable gain over temperature.
Adjustable Linear Regulator
In Figure 7, the MAX5450/MAX5452/MAX5454 is shown
digitally adjusting the output voltage of the MAX8866
dual linear regulator. In this circuit, the MAX5450/
MAX5452/MAX5454 is connected in series with a resistor to ground to form the adjustable feedback stage.
The 8-bit MAX5450/MAX5452/MAX5454 allows precise
tuning of the output voltage.
_______________________________________________________________________________________
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
W1
CS1
S256
UP/DOWN
COUNTER
INC
U/D
R255
POSITION
DECODER
L1
VDD
S255
R254
GND
CS2
S254
MAX5450
MAX5452
MAX5454
POWER-ON
RESET
UP/DOWN
COUNTER
W
W2
POSITION
DECODER
L2
R2
S3
Figure 3. MAX5450/MAX5452/MAX5454 Simplified Functional
Diagram
R1
S2
S1
L
Figure 2. Simplified Digital Potentiometer Resistor Array
W
R3
H1
VDD
CS1
INC1
U/D1
POSITION
DECODER
W1
L1
VDD
GND
MAX5450
MAX5452
MAX5454
R2
UP/DOWN
COUNTER
POWER-ON
RESET
MAX5451
MAX5453
MAX5455
H2
IS
R1
VOUT
L
MAX4250
VOUT
R
= R3 1 + 2 + R2
R1
IS
(
)
CS2
INC2
U/D2
UP/DOWN
COUNTER
POSITION
DECODER
W2
Figure 5. Adjustable Current to Voltage Converter
L2
Figure 4. MAX5451/MAX5453/MAX5455 Simplified Functional
Diagram
_______________________________________________________________________________________
9
MAX5450–MAX5455
H
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
VCC
VIN
VOUT
OUT1
VOUT1
OUT2
VOUT2
W1
MAX4493
W2
MAX8866
VEE
MAX5450
MAX5452
MAX5454
W
V+
MAX5450
MAX5452
MAX5454
IN
L1
SHDN1
SET1
SHDN2
SET2
L2
GND
L
Figure 7. Adjustable Dual Linear Regulator
Figure 6a. Variable Resistor Adjustable-Gain Amplifier
Truth Table
VCC
VIN
VOUT
MAX4493
VEE
W
CS
U/D
INC
H
X
X
O
L
L
↑
O
L
H
↑
O
L
L
↓
−
L
H
↓
+
X = Don’t care
O = Previous State
↓ = High-to-Low Transition
– = Decrement
↑ = Low-to-High Transition
+ = Increment
W
H
L
Chip Information
MAX5451
MAX5453
MAX5455
TRANSISTOR COUNT: 9680
PROCESS: CMOS
Figure 6b. Potentiometer Adjustable-Gain Amplifier
10
______________________________________________________________________________________
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
10LUMAX.EPS
______________________________________________________________________________________
11
MAX5450–MAX5455
Package Information
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
TSSOP,NO PADS.EPS
MAX5450–MAX5455
Package Information (continued)
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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.