Product Summary

The TC7129CKW is a 4-1/2 digit analog-to-digital converter (ADC) that directly drives a multiplexed liquid crystal display (LCD). Fabricated in high performance, low power CMOS, the TC7129CKW ADC is designed specifically for high resolution, battery powered digital multimeter applications. The traditional dual slope method of A/D conversion has been enhanced with a successive integration technique to produce readings accurate to better than 0.005% of full scale, and resolution down to 10μV per count. Applications are (1)Full Featured Multimeters; (2)Digital Measurement Devices.

Parametrics

TC7129CKW absolute maximum ratings: (1)Supply Voltage (V+ to V-): 15V; (2)Reference Voltage (REF HI or REF LO): V+ to VInput; (3)Voltage (IN HI or IN LO)(Note 1): V+ to (DGND – 0.3V); (4)Digital Input (Pins 1, 2, 19, 20, 21, 22, 27, 37, 39, 40): DGND to V+; (5)Analog Input (Pins 25, 29, 30): V+ to VPackage; (6)Power Dissipation (TA ≤ 70°C)Plastic DIP: 1.23W; (7)Power Dissipation (TA ≤ 70°C)PLCC: 1.23W; (8)Power Dissipation (TA ≤ 70°C)Plastic QFP: 1.00W; (9)Operating Temperature Range: 0°C to +70°C.

Features

TC7129CKW features: (1)Count Resolution: ±19,999; (2)Resolution on 200mV Scale: 10μV; (3)True Differential Input and Reference; (4)Low Power Consumption: 500μA at 9V; (5)Direct LCD Driver for 4-1/2 Digits, Decimal Points, Low Battery Indicator, and Continuity Indicator; (6)Over Range and Under Range Outputs; (7)Range Select Input: 10:1; (8)High Common Mode Rejection Ratio: 110dB; (9)External Phase Compensation Not Required.

Diagrams

TC7129CKW pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
TC7129CKW
TC7129CKW
Microchip Technology
ADC (A/D Converters) w/LCD Driver
Data Sheet
0-41: $7.92
41-100: $7.20
100-250: $4.61
250-500: $4.27
TC7129CKW713
TC7129CKW713
Microchip Technology
ADC (A/D Converters) w/LCD Driver
Data Sheet
0-698: $4.27
698-900: $4.27