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TC7109A Dataheets PDF



Part Number TC7109A
Manufacturers Microchip
Logo Microchip
Description Analog-to-Digital Converters
Datasheet TC7109A DatasheetTC7109A Datasheet (PDF)

TC7109/A 12-Bit A-Compatible Analog-to-Digital Converters Features: • Zero Integrator Cycle for Fast Recovery from Input Overloads • Eliminates Cross-Talk in Multiplexed Systems • 12-Bit Plus Sign Integrating A/D Converter with Over Range Indication • Sign Magnitude Coding Format • True Differential Signal Input and Differential Reference Input • Low Noise: 15VP-P Typ. • Input Current: 1pA Typ. • No Zero Adjustment needed • TTL Compatible, Byte Organized Tri-State Outputs • UART Handshake Mod.

  TC7109A   TC7109A



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TC7109/A 12-Bit A-Compatible Analog-to-Digital Converters Features: • Zero Integrator Cycle for Fast Recovery from Input Overloads • Eliminates Cross-Talk in Multiplexed Systems • 12-Bit Plus Sign Integrating A/D Converter with Over Range Indication • Sign Magnitude Coding Format • True Differential Signal Input and Differential Reference Input • Low Noise: 15VP-P Typ. • Input Current: 1pA Typ. • No Zero Adjustment needed • TTL Compatible, Byte Organized Tri-State Outputs • UART Handshake Mode for simple Serial Data Transmissions Device Selection Table Part Number (TC7109X)* Package Temperature Range TC7109CKW TC7109CLW TC7109CPL TC7109IJL 44-Pin PQFP 44-Pin PLCC 40-Pin PDIP 40-Pin CERDIP 0°C to +70°C 0°C to +70°C 0°C to +70°C -25°C to +85°C *The “A” version has a higher IOUT on the digital lines. General Description: The TC7109A is a 12-bit plus sign, CMOS low power Analog-to-Digital Converter (ADC). Only eight passive components and a crystal are required to form a complete dual slope integrating ADC. The improved VOH source current and other TC7109A features make it an attractive per-channel alternative to analog multiplexing for many data acquisition applications. These features include typical input bias current of 1pA, drift of less than 1V/°C, input noise typically 15VP-P, and auto-zero. True differential input and reference allow measurement of bridge type transducers, such as load cells, strain gauges and temperature transducers. The TC7109A provides a versatile digital interface. In the Direct mode, Chip Select and HIGH/LOW byte enable control parallel bus interface. In the Handshake mode, the TC7109A will operate with industry standard UARTs in controlling serial data transmission – ideal for remote data logging. Control and monitoring of conversion timing is provided by the RUN/HOLD input and Status output. For applications requiring more resolution, see the TC500, 15-bit plus sign ADC data sheet. The TC7109A has improved over range recovery performance and higher output drive capability than the original TC7109. All new (or existing) designs should specify the TC7109A wherever possible.  2002-2012 Microchip Technology Inc. DS21456D-page 1 TC7109/A Package Type 44-Pin PQFP 44-Pin PLCC B12 OR POL STATUS GND NC V+ REF INREF CAPREF CAP+ REF IN+ B12 OR POL STATUS GND NC V+ REF INREF CAPREF CAP+ REF IN+ 44 43 42 41 40 39 38 37 36 35 34 B11 1 33 IN HI B10 2 32 IN LO B9 3 31 COMMON B8 4 30 INT B7 5 NC 6 TC7109ACKW TC7109CKW 29 AZ 28 NC B6 7 27 BUFF B5 8 26 REF OUT B4 9 25 V- B3 10 24 SEND B2 11 23 RUN/HOLD 12 13 14 15 16 17 18 19 20 21 22 6 5 4 3 2 1 44 43 42 41 40 B11 7 39 IN HI B10 8 38 IN LO B9 9 37 COMMON B8 10 36 INT B7 11 NC 12 B6 13 TC7109ACLW TC7109CLW 35 AZ 34 NC 33 BUFF B5 14 32 REF OUT B4 15 31 V- B3 16 30 SEND B2 17 29 RUN/HOLD 18 19 20 21 22 23 24 25 26 27 28 B1 TEST LBEN HBEN CE/LOAD NC MODE OSC IN OSC OUT OSC SEL BUFF OSC OUT B1 TEST LBEN HBEN CE/LOAD NC MODE OSC IN OSC OUT OSC SEL BUFF OSC OUT 40-Pin PDIP/CERDIP GND 1 STATUS 2 POL 3 OR 4 B12 5 B11 6 B10 7 B9 8 B8 9 B7 10 B6 11 B5 12 B4 13 B3 14 B2 15 B1 16 TEST 17 LBEN 18 HBEN 19 CE/LOAD 20 TC7109A TC7109 40 V+ 39 REF IN38 REF CAP37 REF CAP+ 36 REF IN+ 35 IN HI 34 IN LO 33 COMMON 32 INT 31 AZ 30 BUFF 29 REF OUT 28 V27 SEND 26 RUN/HOLD 25 BUFF OSC OUT 24 OSC SEL 23 OSC OUT 22 OSC IN 21 MODE NC = No internal connection DS21456D-page 2  2002-2012 Microchip Technology Inc. TC7109/A Typical Application TEST POL OR B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 TC7109A REF REF CREF REF CAP+ IN+ IN- 37 36 39 REF RINT CAZ CINT CAP38 30 BUFF 31 AZ 32 INT 17 High Order Byte Inputs Low Order Byte Inputs 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Input 35 INT High AZ AZ ZI ZI DE DE (–) (+) Buffer – + Integrator – + Comparator Comp Out 16 Three-State Outputs 14 Latches AZ Common 33 Input Low 34 INT DE DE (+) (–) AZ DE (±) ZI ZI 10mA – + AZ To Analog Section Comp Out AZ INT DE (±) ZI 12-Bit Counter Latch Clock Conversion Control Logic Oscillator and Clock Circuitry Handshake Logic 6.2V 18 LBEN 19 HBEN 20 CE/LOAD 29 28 REF VOUT 40 V+ 2 Status 26 22 23 24 25 21 RUN/ OSC OSC OSC BUFF Mode HOLD IN OUT SEL OSC OUT 27 Send 1 GND  2002-2012 Microchip Technology Inc. DS21456D-page 3 TC7109/A 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings* Positive Supply Voltage (GND to V+) ..................+6.2V Negative Supply Voltage (GND to V-) .....................-9V Analog Input Voltage (Low to High) (Note 1).... V+ to VReference Input Voltage: (Low to High) (Note 1) ............................. V+ to VDigital Input Voltage: (Pins 2-27) (Note 2) ...........................GND – 0.3V Power Dissipation, TA < 70°C (Note 3) CERDIP ......................................................2.29W Plastic DIP ..................................................1.23W PLCC ...................................


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