Digital Potentiometer, NV, 256 taps Dual/ 3 wire, w/Buf

Not Recommended for New Design
CAT522
Configured Digitally Programmable Potentiometer (DPP):
Programmable Voltage Applications
FEATURES
DESCRIPTION
„ Two 8-bit DPPs configured as programmable
voltage sources in DAC-like applications
„ Independent reference inputs
„ Non-volatile NVRAM memory wiper storage
„ Output voltage range includes both supply rails
„ 2 independently addressable buffered
output wipers
„ 1 LSB accuracy, high resolution
„ Serial Microwire-like interface
„ Single supply operation: 2.7V - 5.5V
„ Setting read-back without effecting outputs
The CAT522 is a dual, 8-bit digitally-programmable
potentiometer (DPP) configured for programmable
voltage and DAC-like applications. Intended for final
calibration of products such as camcorders, fax
machines and cellular telephones on automated high
volume production lines, it is also well suited for selfcalibrating systems and for applications where
equipment which requires periodic adjustment is either
difficult to access or in a hazardous environment.
The CAT522 offers two independently programmable
DPPs each having its own reference inputs and each
capable of rail to rail output swing. The wipers are
buffered by rail to rail opamps. Wiper settings, stored
in non-volatile NVRAM memory, are not lost when the
device is powered down and are automatically
reinstated when power is returned. Each wiper can
be dithered to test new output values without effecting
the stored settings and stored settings can be read
back without disturbing the DPP's output.
For Ordering Information details, see page 14.
APPLICATIONS
„ Automated product calibration.
„ Remote control adjustment of equipment
„ Offset, gain and zero adjustments in selfcalibrating and adaptive control systems.
„ Tamper-proof calibrations.
„ DAC (with memory) substitute.
The CAT522 is controlled with a simple 3-wire,
microwire-like serial interface. A Chip Select pin
allows several devices to share a common serial
interface. Communication back to the host controller is
via a single serial data line thanks to the CAT522 Tri¯¯¯¯ output working
Stated Data Output pin. A RDY/BSY
in concert with an internal low voltage detector signals
proper operation of the non-volatile NVRAM memory
Erase/Write cycle.
PIN CONFIGURATION
The CAT522 is available in the 0°C to 70°C
commercial and -40°C to 85°C industrial operating
temperature ranges. Both 14-pin plastic DIP and
surface mount packages are available.
PDIP 14-Lead (L)
SOIC 14-Lead (W)
VDD
1
14
VREFH1
CLK
2
13
VREFH1
RDY/¯¯¯¯
BSY
3
12
VOUT1
4 CAT522 11
VOUT2
DI
5
10
VREFL2
DO
6
8
VREFL1
PROG
7
8
GND
CS
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
1
Doc. No. MD-2004 Rev. I
CAT522
Not Recommended for New Design
FUNCTIONAL DIAGRAM
VDD
VREFH1 VREFH2
1
PROG
DI
CLK
CS
13
3
7
PROGRAM
CONTROL
5
2
SERIAL
CONTROL
4
WIPER CONTROL REGISTERS
AND NVRAM
RDY/BSY
14
24kΩ
+
11
VOUT2
–
24kΩ
+
12
VOUT1
–
SERIAL
DATA
OUTPUT
REGISTER
CAT522
6
8
GND
Doc. No. MD-2004 Rev. I
9
DO
10
VREFL1 VREFL2
2
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Not Recommended for New Design
CAT522
ABSOLUTE MAXIMUM RATINGS (1)
Parameters
Ratings
Supply Voltage
VDD to GND
Inputs
CLK to GND
CS to GND
DI to GND
¯¯¯¯ to GND
RDY/BSY
PROG to GND
VREFH to GND
VREFL to GND
Units
-0.5 to +7
-0.5 to VDD +0.5
-0.5 to VDD +0.5
-0.5 to VDD +0.5
-0.5 to VDD +0.5
-0.5 to VDD +0.5
-0.5 to VDD +0.5
-0.5 to VDD +0.5
V
V
V
V
V
V
V
V
Parameters
Outputs
D0 to GND
VOUT 1– 4 to GND
Operating Ambient Temperature
Commercial
(‘C’ or Blank suffix)
Industrial (‘I’ suffix)
Junction Temperature
Storage Temperature
Lead Soldering (10s max)
Ratings
Units
-0.5 to VDD +0.5
V
-0.5 to VDD +0.5
V
0 to +70
°C
-40 to +85
+150
-65 to +150
+300
°C
°C
°C
°C
RELIABILITY CHARACTERISTICS
Symbol
Parameter
Test Method
Min
VZAP(2)
ILTH(2) (3)
Max
Units
ESD Susceptibility
MIL-STD-883, Test Method 3015
2000
V
Latch-Up
JEDEC Standard 17
100
mA
POWER SUPPLY
Symbol
Parameter
Conditions
IDD1
Supply Current (Read)
IDD2
Supply Current (Write)
VDD
Min
Typ
Max
Units
Normal Operating
—
400
600
µA
Programming, VDD = 5V
—
1600
2500
µA
VDD = 3V
—
1000
1600
µA
2.7
—
5.5
V
Min
Typ
Max
Units
Operating Voltage Range
LOGIC INPUTS
Symbol
Parameter
Conditions
IIH
Input Leakage Current
VIN = VDD
—
—
10
µA
IIL
Input Leakage Current
VIN = 0V
—
—
-10
µA
VIH
High Level Input Voltage
2
—
VDD
V
VIL
Low Level Input Voltage
0
—
0.8
V
LOGIC OUTPUTS
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VOH
High Level Output Voltage
IOH = -40µA
VDD -0.3
—
—
V
VIL
Low Level Output Voltage
IOL = 1mA, VDD = +5V
—
—
0.4
V
IOL = 0.4mA, VDD = +3V
—
—
0.4
V
Notes:
(1) Stresses above 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 outside of those listed in the operational sections of this
specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.
(2) This parameter is tested initially and after a design or process change that affects the parameter.
(3) Latch-up protection is provided for stresses up to 100mA on address and data pins from –1V to VCC + 1V.
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
3
Doc. No. MD-2004 Rev. I
CAT522
Not Recommended for New Design
POTENTIOMETER CHARACTERISTICS
VDD = +2.7V to +5.5V, VREFH = VDD, VREFL = 0V, unless otherwise specified
Symbol
RPOT
Parameter
Conditions
Min
Potentiometer Resistance
Typ
Max
24
RPOT to RPOT Match
—
Units
kΩ
±0.5
Pot Resistance Tolerance
±1
%
±20
%
Voltage on VREFH pin
2.7
VDD
V
Voltage on VREFL pin
0
VDD - 2.7
V
Resolution
0.4
%
INL
Integral Linearity Error
0.5
1
LSB
DNL
Differential Linearity Error
0.25
0.5
LSB
ROUT
Buffer Output Resistance
10
Ω
IOUT
Buffer Output Current
3
mA
TCRPOT
TC of Pot Resistance
300
ppm/ºC
CH/CL
Potentiometer Capacitances
8/8
pF
AC ELECTRICAL CHARACTERISTICS
VDD = +2.7V to +5.5V, VREFH = VDD, VREFL = 0V, unless otherwise specified
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Digital
tCSMIN
Minimum CS Low Time
150
—
—
ns
tCSS
CS Setup Time
100
—
—
ns
tCSH
CS Hold Time
0
—
—
ns
tDIS
DI Setup Time
50
—
—
ns
50
—
—
ns
CL = 100pF
(1)
tDIH
DI Hold Time
tDO1
Output Delay to 1
—
—
150
ns
tDO0
Output Delay to 0
—
—
150
ns
tHZ
Output Delay to High-Z
—
400
—
ns
tLZ
Output Delay to Low-Z
—
400
—
ns
tBUSY
Erase/Write Cycle Time
—
4
5
ms
tPS
PROG Setup Time
150
—
—
ns
tPROG
Minimum Pulse Width
700
—
—
ns
tCLKH
Minimum CLK High Time
500
—
—
ns
tCLKL
Minimum CLK Low Time
300
—
—
ns
fC
Clock Frequency
DC
—
1
MHz
CLOAD = 10pF, VDD = +5V
—
3
10
µs
CLOAD = 10pF, VDD = +3V
—
6
10
µs
Analog
tDS
DPP Settling Time to 1 LSB
Notes:
(1) All timing measurements are defined at the point of signal crossing VDD / 2.
(2) These parameters are periodically sampled and are not 100% tested.
Doc. No. MD-2004 Rev. I
4
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Not Recommended for New Design
CAT522
A.C. TIMING DIAGRAM
to
1
2
3
4
5
tCLK H
CLK
tCSS
tCLK L
t CSH
CS
tCSMIN
tDIS
DI
tDIH
t DO0
tLZ
DO
tHZ
tDO1
PROG
t PS
tPROG
RDY/BSY
tBUSY
to
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
1
2
3
5
4
5
Doc. No. MD-2004 Rev. I
CAT522
Not Recommended for New Design
PIN DESCRIPTION
Pin
Name
Function
1
VDD
Power supply positive
2
CLK
Clock input pin
3
¯¯¯¯
RDY/BSY
4
CS
Chip select
5
DI
Serial data input pin
6
DO
Serial data output pin
7
PROG
8
GND
Power supply ground
9
VREFL1
Minimum DPP1 output voltage
10
VREFL2
Minimum DPP2 output voltage
11
VOUT2
DPP2 output
12
VOUT1
DPP1 output
13
VREFH2
Maximum DPP2 output voltage
14
VREFH1
Maximum DPP1 output voltage
DPP addressing is as follows:
Ready/Busy output
DPP OUTPUT
A0
A1
VOUT1
0
1
VOUT2
1
1
EEPROM Programming Enable
Input
DEVICE OPERATION
The CAT522 is a dual 8-bit configured digitally
programmable potentiometer (DPP) whose outputs
can be programmed to any one of 256 individual
voltage steps.
Once programmed, these output
settings are retained in non-volatile memory and will
not be lost when power is removed from the chip.
Upon power up the DPPs return to the settings stored
in non-volatile memory. Each DPP can be written to
and read from independently without effecting the
output voltage during the read or write cycle. Each
output can also be adjusted without altering the
stored output setting, which is useful for testing new
output settings before storing them in memory.
because the DO pin is Tri-Stated and returns to a high
impedance when not in use.
CHIP SELECT
Chip Select (CS) enables and disables the CAT522’s
read and write operations. When CS is high data may
be read to or from the chip, and the Data Output (DO)
pin is active. Data loaded into the DPP control regis–
ters will remain in effect until CS goes low. Bringing
CS to a logic low returns all DPP outputs to the
settings stored in non-volatile memory and switches
DO to its high impedance Tri-State mode.
Because CS functions like a reset the CS pin has
been desensitized with a 30 ns to 90 ns filter circuit to
prevent noise spikes from causing unwanted resets
and the loss of volatile data.
DIGITAL INTERFACE
The CAT522 employs a 3 wire serial, Microwire-like
control interface consisting of Clock (CLK), Chip
Select (CS) and Data In (DI) inputs.
For all
operations, address and data are shifted in LSB first.
In addition, all digital data must be preceded by a logic
“1” as a start bit. The DPP address and data are
clocked into the DI pin on the clock’s rising edge.
When sending multiple blocks of information a
minimum of two clock cycles is required between the
last block sent and the next start bit.
CLOCK
The CAT522’s clock controls both data flow in and out
of the IC and non-volatile memory cell programming.
Serial data is shifted into the DI pin and out of the DO
pin on the clock’s rising edge. While it is not neces–
sary for the clock to be running between data
transfers, the clock must be operating in order to write
to non-volatile memory, even though the data being
saved may already be resident in the DPP wiper
control register.
Multiple devices may share a common input data line
by selectively activating the CS control of the desired
IC. Data Outputs (DO) can also share a common line
Doc. No. MD-2004 Rev. I
6
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Not Recommended for New Design
CAT522
¯¯¯¯ will remain high following the program
RDY/BSY
command indicating a failure to record the desired
data in non-volatile memory.
No clock is necessary upon system power-up. The
CAT522’s internal power-on reset circuitry loads data
from non-volatile memory to the DPPs without using
the external clock.
As data transfers are edge triggered clean clock
transitions are necessary to avoid falsely clocking
data into the control registers. Standard CMOS and
TTL logic families work well in this regard and it is
recommended that any mechanical switches used for
breadboarding or device evaluation purposes be
debounced by a flip-flop or other suitable debouncing
circuit.
DATA OUTPUT
Data is output serially by the CAT522, LSB first, via
the Data Out (DO) pin following the reception of a
start bit and two address bits by the Data Input (DI).
DO becomes active whenever CS goes high and
resumes its high impedance Tri-State mode when CS
returns low. Tri-Stating the DO pin allows several
522s to share a single serial data line and simplifies
interfacing multiple 522s to a microprocessor.
VREF
VREF, the voltage applied between pins VREFH & VREFL,
sets the DPP’s Zero to Full Scale output range where
VREFL = Zero and VREFH = Full Scale. VREF can span
the full power supply range or just a fraction of it. In
typical applications VREFH & VREFL are connected
across the power supply rails. When using less than
the full supply voltage be mindfull of the limits placed
on VREFH and VREFL as specified in the References
section of DC Electrical Characteristics.
WRITING TO MEMORY
Programming the CAT522’s non-volatile memory is
accomplished through the control signals: Chip Select
(CS) and Program (PROG). With CS high, a start bit
followed by a two bit DPP address and eight data bits
are clocked into the DPP wiper control register via the
DI pin. Data enters on the clock’s rising edge. The
DPP output changes to its new setting on the clock
cycle following D7, the last data bit.
Programming is accomplished by bringing PROG high
sometime after the start bit and at least 150 ns prior to
the rising edge of the clock cycle immediately following
the D7 bit. Two clock cycles after the D7 bit the DPP
wiper control register will be ready to receive the next
set of address and data bits. The clock must be kept
running throughout the programming cycle. Internal
control circuitry takes care of generating and ramping
up the programming voltage for data transfer to the
non-volatile cells. The CAT522’s non-volatile memory
cells will endure over 1,000,000 write cycles and will
retain data for a minimum of 100 years without being
refreshed.
¯¯¯¯¯
READY/BUSY
When saving data to non-volatile memory, the
¯¯¯¯) signals the start and
Ready/Busy ouput (RDY/BSY
duration of the erase/write cycle. Upon receiving a
¯¯¯¯
command to store data (PROG goes high) RDY/BSY
goes low and remains low until the programming cycle is
complete. During this time the CAT521 will ignore any
data appearing at DI and no data will be output on DO.
¯¯¯¯ is internally ANDed with a low voltage
RDY/BSY
detector circuit monitoring VDD. If VDD is below the
minimum value required for non-volatile programming,
Figure 1. Writing to Memory
to
1
2
3
4
5
6
A0
A1
D0
D1
7
8
9
10
11
12
N
N+1 N+2
CS
NEW DPP DATA
DI
1
D2
D3
D4
D5
D6
D7
D6
D7
CURRENT DPP DATA
DO
D0
D1
D2
D3
D4
D5
PROG
RDY/BSY
DPP
OUTPUT
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
CURRENT
DPP VALUE
NEW
DPP VALUE
NEW
DPP VALUE
NON-VOL ATILE
VOLATILE
NON-VOL ATILE
7
Doc. No. MD-2004 Rev. I
CAT522
Not Recommended for New Design
READING DATA
Each time data is transferred into a DPP control
register currently held data is shifted out via the D0
pin, thus in every data transaction a read cycle
occurs. Note, however, that the reading process is
destructive. Data must be removed from the register
in order to be read. Figure 2 depicts a Read Only
cycle in which no change occurs in the DPP’s output.
This feature allows µPs to poll DPPs for their current
setting without disturbing the output voltage but it
assumes that the setting being read is also stored in
non-volatile memory so that it can be restored at the
end of the read cycle. In Figure 2 CS returns low
before the 13th clock cycle completes. In doing so the
non-volatile memory setting is reloaded into the DPP
wiper control register. Since this value is the same as
that which had been there previously no change in the
DPP’s output is noticed. Had the value held in the
control register been different from that stored in nonvolatile memory then a change would occur at the
read cycle’s conclusion.
TEMPORARILY CHANGE OUTPUT
The CAT522 allows temporary changes in DPP’s
output to be made without disturbing the settings
retained in non-volatile memory. This feature is parti–
cularly useful when testing for a new output setting
and allows for user adjustment of preset or default
values without losing the original factory settings.
Figure 2. Reading from Memory
Figure 3. Temporary Change in Output
to
1
2
3
4
5
6
7
8
9
10
11
Figure 3 shows the control and data signals needed
to effect a temporary output change. DPP wiper
settings may be changed as many times as required
and can be made to any of the two DPPs in any order
or sequence. The temporary setting(s) remain in
effect long as CS remains high. When CS returns low
all two DPPs will return to the output values stored in
non-volatile memory.
When it is desired to save a new setting acquired
using this feature, the new value must be reloaded
into the DPP wiper control register prior to
programming. This is because the CAT522’s internal
control circuitry discards from the programming
register the new data two clock cycles after receiving
it if no PROG signal is received.
12
to
CS
1
2
3
4
5
6
A0
A1
D0
D1
7
8
9
10
11
12
N
N+1 N+2
CS
NEW DPP DATA
DI
1
A0
A1
DI
CURRENT DPP DATA
DO
D0
D1
D2
D3
D4
D5
D6
1
D2
D3
D4
D5
D6
D7
D6
D7
CURRENT DPP DATA
D7
DO
D0
D1
D2
D3
D4
D5
PROG
PROG
RDY/BSY
DPP
OUTPUT
RDY/BSY
CURRENT
DPP VALUE
DPP
OUTPUT
NON-VOL ATILE
Doc. No. MD-2004 Rev. I
8
CURRENT
DPP VALUE
NEW
DPP VALUE
CURRENT
DPP VALUE
NON-VOL ATILE
VOLATILE
NON-VOL ATILE
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Not Recommended for New Design
CAT522
APPLICATION CIRCUITS
+5V
VI
RI
DPP INPUT
RF
DPP OUTPUT
VDPP =
+15V
VREFH
VDD
CONTROL
& DATA
CAT522
VDPP
OP 07
-15V
VOUT =
LSB
VOUT
+
VREFL
GND
MSB
–
VDPP ( RI + RF ) - VI R F
RI
For R I = RF
VOUT = 2VDPP - VI
1111
1111
1000
0000
0111
1111
0000
0001
0000
0000
ANALOG OUTPUT
CODE
x (VFS - VZERO) + VZERO
255
VFS = 0.99VREF
VREF = 5V
VZERO = 0.01VREF
RI = RF
255
× 0.98VREF + 0.01VREF = 0.990 VREF
255
128
× 0.98VREF + 0.01VREF = 0.502VREF
255
127
× 0.98VREF + 0.01VREF = 0.498 VREF
255
1
× 0.98VREF + 0.01VREF = 0.014 VREF
255
0
× 0.98VREF + 0.01VREF = 0.010 VREF
255
VOUT = +4.90V
VOUT = +0.02V
VOUT = -0 .02V
VOUT = -4.86V
VOUT = -4.90V
Bipolar DPP Output
V+
+5V
RI
I > 2mA
RF
+15V
VDD
CONTROL
& DATA
–
VREFH
+
CAT522
GND
OP 07
VDD
CONTROL
& DATA
-15V
VREFL
VREF = 5.00V
VOUT
CAT522
GND
R
VOUT = (1 + F ) VDPP
RI
Amplified DPP Output
VREFH
LT 1029
VREFL
Digitally Trimmed Voltage Reference
28 - 32V
15kΩ
10µF
10kΩ
1N5231B
VDD
CONTROL
& DATA
VREFH
5.1V
CAT522
GND
+
–
VREFL
MPT3055EL
LM 324
OUTPUT
1.00kΩ
4.02kΩ
10µF
35V
0 - 25V
@ 1A
Digitally Controlled Voltage Reference
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
9
Doc. No. MD-2004 Rev. I
CAT522
+5V
Not Recommended for New Design
+5V
VREF
VDD
VREFH
FINE ADJUST
DPP
VDD
127RC
127RC
RC =
CAT522
COARSE ADJUST
DPP
RC =
VREFH
FINE ADJUST
DPP
CAT522
GND
+VREF
RC
VOFFSET
+V
COARSE ADJUST
DPP
+
–
VREFL
GND
VREFL
(+VREF) - (VOFFSET+)
1µA
(-VREF) + (VOFFSET+)
RC
R0 =
R0
VOFFSET
-VREF
VREF
1µA
+V
+
–
256 x 1µA
-V
Fine adjust gives ±1 LSB change in VOFFSET
when VOFFSET = VREF/2
Coarse-Fine Offset Control by Averaging DPP
Outputs for Single Power Supply Systems
Coarse-Fine Offset Control by Averaging DPP
Outputs for Dual Power Supply Systems
+5V
2.2kΩ
VDD
VREFH
4.7µF
LM385-2.5
ISINK = 2 - 255mA
+15V
DPP1
+
1mA steps
2N7000
–
+5V
CONTROL
& DATA
10kΩ
10kΩ
CAT522
39Ω 1W
39Ω 1W
DPP2
+
5µA steps
2N7000
–
GND
VREFL
5MΩ
5MΩ
3.9kΩ
10kΩ
10kΩ
–
TIP30
+
Current Sink with 4 Decades of Resolution
Doc. No. MD-2004 Rev. I
10
-15V
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Not Recommended for New Design
CAT522
+15V
51kΩ
+
TIP29
–
10kΩ
10kΩ
5MΩ
39Ω 1W
+5V
VREFH
VDD
5MΩ
DPP1
39Ω 1W
–
CONTROL
& DATA
CAT522
BS170P
+
5MΩ
5MΩ
1mA steps
3.9kΩ
DPP2
GND
–
VREFL
+
BS170P
5µA steps
LM385-2.5
-15V
ISOURCE = 2 ÷ 255mA
Current Source with 4 Decades of Resolution
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
11
Doc. No. MD-2004 Rev. I
CAT522
Not Recommended for New Design
PACKAGE OUTLINE DRAWINGS
PDIP 14-LEAD (L)(1)(2)
SYMBOL
MIN
A
3.56
5.33
A1
0.38
2.92
3.30
4.95
b
0.36
0.45
0.55
b1
1.15
1.52
1.77
c
0.21
0.26
0.35
D
18.67
19.05
19.68
E
7.62
7.87
8.25
E1
6.10
6.35
7.11
e
TOP VIEW
MAX
A2
E1
D
NOM
2.54 BSC
eB
7.88
L
2.99
10.92
3.30
3.81
E
A2
A
c
A1
e
L
b
b1
eB
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-001.
Doc. No. MD-2004 Rev. I
12
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Not Recommended for New Design
CAT522
SOIC 14-LEAD (W)(1)(2)
SYMBOL
E1
MIN
NOM
MAX
A
1.35
1.75
A1
0.10
0.25
b
0.33
0.51
c
0.19
D
8.55
E
E1
E
0.25
8.65
8.75
5.80
6.00
6.20
3.80
3.90
4.00
e
1.27 BSC
h
0.25
0.50
L
0.40
1.27
θ
0º
8º
PIN#1 IDENTIFICATION
TOP VIEW
h
D
θ
A
e
b
c
L
A1
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-012.
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
13
Doc. No. MD-2004 Rev. I
CAT522
Not Recommended for New Design
EXAMPLE OF ORDERING INFORMATION(1)
Prefix
CAT
Device # Suffix
522
Optional
Company ID
W
I
Temperature Range
I = Industrial (-40ºC to 85ºC)
Product
Number
522
–
T2
Tape & Reel
T: Tape & Reel
2: 2000/Reel
Package
L: PDIP
W: SOIC
ORDERING PART NUMBER
CAT522LI
CAT522WI
Notes:
(1) All packages are RoHS-compliant (Lead-free, Halogen-free).
(2) The standard lead finish is Matte-Tin.
(3) The device used in the above example is a CAT522WI-T2 (SOIC, Industrial Temperature, Tape & Reel, 2000).
Doc. No. MD-2004 Rev. I
14
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Not Recommended for New Design
CAT522
REVISION HISTORY
Date
16-Mar-04
Revision
D
Description
Updated Potentiometer Characteristics
12-Jul-04
E
26-Jul-07
F
31-Oct-07
G
Updated Functional Diagram
Updated Potentiometer Characteristics
Add Package Outline Drawings
Update Example of Ordering Information
Updated Ordering Information
Added MD- to document number
Update Example of Ordering Information
14-Jul-08
H
Add “Not Recommended for New Design” to the top of all pages.
24-Nov-08
I
Change logo and fine print to ON Semiconductor
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© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
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Doc. No. MD-2004 Rev. I
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