TC7109ACLW Microchip

TC7109/A 12-Bit A-Compatible Analog-to-Digital Converters Features: General Description: Zero Integrator Cycle for Fast Recovery from The TC7109A is a 12-bit plus sign, CMOS low power Input Overloads Analog-to-Digital Converter (ADC). Only eight passive components and a crystal are required to form a Eliminates Cross-Talk in Multiplexed Systems complete dual slope integrating ADC. 12-Bit Plus Sign Integrating A/D Converter with Over Range Indication source current and other TC7109A The improved V OH features make it an attractive per-channel alternative to Sign Magnitude Coding Format analog multiplexing for many data acquisition applica- True Differential Signal Input and Differential tions. These features include typical input bias current Reference Input of 1pA, drift of less than 1 V/C, input noise typically Low Noise: 15V Typ. P-P 15V , and auto-zero. True differential input and ref- P-P Input Current: 1pA Typ. erence allow measurement of bridge type transducers, No Zero Adjustment needed such as load cells, strain gauges and temperature transducers. TTL Compatible, Byte Organized Tri-State Outputs The TC7109A provides a versatile digital interface. In UART Handshake Mode for simple Serial Data /LOW byte the Direct mode, Chip Select and HIGH Transmissions enable control parallel bus interface. In the Handshake mode, the TC7109A will operate with industry standard UARTs in controlling serial data transmission ideal for Device Selection Table remote data logging. Control and monitoring of conver- Part Number Temperature Package sion timing is provided by the RUN/HOLD input and (TC7109X)* Range Status output. TC7109CKW 44-Pin PQFP 0C to +70C For applications requiring more resolution, see the TC7109CLW 44-Pin PLCC 0C to +70C TC500, 15-bit plus sign ADC data sheet. The TC7109A TC7109CPL 40-Pin PDIP 0C to +70C has improved over range recovery performance and TC7109IJL 40-Pin CERDIP -25C to +85C higher output drive capability than the original TC7109. All new (or existing) designs should specify the *The A version has a higher I on the digital lines. OUT TC7109A wherever possible. 2002-2012 Microchip Technology Inc. DS21456D-page 1TC7109/A Package Type 44-Pin PQFP 44-Pin PLCC 6 543 2 1 44 43 42 41 40 44 43 42 41 40 39 38 37 36 35 34 B B 7 39 1 33 IN HI 11 IN HI 11 B B 2 32 8 38 IN LO IN LO 10 10 B B 9 37 3 31 9 COMMON 9 COMMON B 10 36 B 4 30 8 INT 8 INT B B 11 35 AZ 5 29 AZ 7 7 TC7109ACKW TC7109ACLW 28 NC 12 34 NC NC 6 TC7109CKW NC TC7109CLW B B 13 33 7 27 6 BUFF 6 BUFF B B 14 32 REF OUT 5 8 26 REF OUT 5 B B 15 31 9 25 4 V- 4 V- B B 3 16 30 SEND 10 24 SEND 3 B B 11 23 2 17 29 RUN/HOLD 2 RUN/HOLD 12 13 14 15 16 17 18 19 20 21 22 18 19 20 21 22 23 24 25 26 27 28 40-Pin PDIP/CERDIP GND 1 40 V+ STATUS 2 39 REF IN- POL 3 38 REF CAP- 4 37 REF CAP+ OR B 5 36 REF IN+ 12 B 6 11 35 IN HI B IN LO 10 7 34 B TC7109A 9 8 33 COMMON TC7109 B 32 9 INT 8 B 7 10 31 AZ B 6 30 BUFF 11 B 12 29 REF OUT 5 B 13 28 4 V- B 27 3 14 SEND B 26 2 15 RUN/HOLD B 1 16 25 BUFF OSC OUT TEST 17 24 OSC SEL LBEN 18 23 OSC OUT 19 22 HBEN OSC IN 20 21 CE/LOAD MODE NC = No internal connection DS21456D-page 2 2002-2012 Microchip Technology Inc. B B 1 12 TEST OR LBEN POL STATUS HBEN CE/LOAD GND NC NC MODE V+ OSC IN REF IN- OSC OUT REF CAP- OSC SEL REF CAP+ BUFF REF IN+ OSC OUT B B 1 12 TEST OR POL LBEN STATUS HBEN GND CE/LOAD NC NC MODE V+ OSC IN REF IN- OSC OUT REF CAP- OSC SEL REF CAP+ BUFF REF IN+ OSC OUT