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CAT5251 Datasheet, PDF (4/15 Pages) Catalyst Semiconductor – Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface
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CAT5251
POTENTIOMETER CHARACTERISTICS
Over recommended operating conditions unless otherwise stated.
Symbol Parameter
Test Conditions
RPOT
RPOT
IW
Potentiometer Resistance (-00)
Potentiometer Resistance (-50)
Potentiometer Resistance Tolerance
RPOT Matching
Power Rating
Wiper Current
RW Wiper Resistance
VTERM Voltage on any RH or RL Pin
VN Noise
Resolution
Absolute Linearity (2)
Relative Linearity (3)
TCRPOT Temperature Coefficient of RPOT
TCRATIO Ratiometric Temp. Coefficient
CH/CL/CW Potentiometer Capacitances
fc Frequency Response
25°C, each pot
IW = ±3 mA @ VCC = 3 V
IW = ±3 mA @ VCC = 5 V
VSS = 0 V
(1)
RW(n)(actual) - R(n)(expected)(5)
RW(n+1) - [RW(n)+LSB](5)
(1)
(1)
(1)
RPOT = 50 kΩ (1)
Min
GND
Typ
100
50
200
100
0.4
±300
10/10/25
0.4
Max
±20
1
50
±3
300
150
VCC
±1
±0.5
20
Units
kΩ
kΩ
%
%
mW
mA
Ω
Ω
V
nV/√Hz
%
LSB(4)
LSB(4)
ppm/°C
ppm/°C
pF
MHz
D.C. OPERATING CHARACTERISTICS
Over recommended operating conditions unless otherwise stated.
Symbol Parameter
Test Conditions
ICC1
ICC2
ISB
ILI
ILO
VIL
VIH
VOL1
VOH1
Power Supply Current
Power Supply Current
Non-volatile Write
Standby Current (VCC = 5.0 V)
Input Leakage Current
Output Leakage Current
Input Low Voltage
Input High Voltage
Output Low Voltage (VCC = 3 V)
Output High Voltage (VCC = 6 V)
fSCK = 2.5 MHz, SO Open
VCC = 6 V Inputs = GND
fSCK = 2.5 MHz, SO = Open
VCC = 6 V Inputs = GND
VIN = GND or VCC; SO Open
VIN = GND to VCC
VOUT = GND to VCC
IOL = 3 mA
IOH = -1.6 mA
Min Typ
-1
VCC x 0.7
VCC - 0.8
Max
1
5
1
10
10
VCC x 0.3
VCC + 1.0
0.4
Units
mA
mA
µA
µA
µA
V
V
V
V
Notes:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a
potentiometer.
(3) Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potenti-
ometer. It is a measure of the error in step size.
(4) LSB = RTOT / 255 or (RH - RL) / 255, single pot
(5) n = 0, 1, 2, ..., 255.
Doc. No. MD-2017 Rev. H
4
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
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