CAT5136, CAT5137, CAT5138
Digital Potentiometers (POTs) with 128 Taps and I2C Interface
Description
CAT5136, CAT5137, a...
CAT5136, CAT5137, CAT5138
Digital Potentiometers (POTs) with 128 Taps and I2C Interface
Description
CAT5136, CAT5137, and CAT5138 are a family of digital POTs operating like mechanical potentiometers in various configurations. The tap points between the 127 equal resistive elements are connected to the wiper output via
CMOS switches. The switches are controlled by a 7-bit Wiper Control Register (WCR) via the I2C serial bus. CAT5136 is configured as a variable resistor. CAT5137 and CAT5138 are resistive
voltage dividers, with one terminal of the potentiometer connected to GND. CAT5137 and CAT5138 have different device IDs, which makes it possible to use both on the same I2C bus. Upon power-up, the WCR is set to mid-scale (1000000).
Features
Single Linear Digital Potentiometer with 128 Taps End-to-End Resistance of 10 kW, 50 kW and 100 kW I2C Interface Wiper goes to Midscale at Power-up Digital Supply Range (VDD): 2.7 V to 5.5 V Low Standby Current Industrial Temperature Range: −40C to +85C 6-pin SC−70 Package These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
LCD Screen Adjustment Volume Control Mechanical Potentiometer Replacement Gain Adjustment Line Impedance Matching VCOM Setting Adjustments
http://onsemi.com
SC−70 SD SUFFIX CASE 419AD
PIN CONNECTIONS (for low pin count devices)
VDD 1
6 RL
GND 2
5 RW
SCL 3
4 SDA
CAT5136
VDD 1
6 RH
GND 2
5 RW
SCL 3
4 SDA
CAT5137 CAT5138
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