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TC835CKW Datasheet(PDF) 1 Page - TelCom Semiconductor, Inc |
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TC835CKW Datasheet(HTML) 1 Page - TelCom Semiconductor, Inc |
1 / 12 page 3-65 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 TC835 FEATURES s Upgrade of Pin-Compatible TC7135, ICL7135, MAX7135 and SI7135 s Guaranteed 200 kHz Operation s Single 5V Operation With TC7660 s Multiplexed BCD Data Output s UART and Microprocessor Interface s Control Outputs for Auto-Ranging s Input Sensitivity ............................................ 100 µV s No Sample and Hold Required APPLICATIONS s Personal Computer Data Acquisition s Scales, Panel Meters, Process Controls s HP-IL Bus Instrumentation ORDERING INFORMATION Temperature Part No. Package Range TC835CBU 64-Pin PQFP 0 °C to +70°C TC835CKW 44-Pin PQFP 0 °C to +70°C TC835CPI 28-Pin Plastic DIP 0 °C to +70°C NOTE: Tape and reel available for 44-pin PQFP packages. PERSONAL COMPUTER DATA ACQUISITION A/D CONVERTER GENERAL DESCRIPTION The TC835 is a low-power, 4-1/2 digit (0.005% resolu- tion), BCD analog-to-digital converter (ADC) that has been characterized for 200 kHz clock rate operation. The five conversions per second rate is nearly twice as fast as the ICL7135 or TC7135. The TC835 (like the TC7135) does not use the external diode-resistor roll-over error compen- sation circuits required by the ICL7135. The multiplexed BCD data output is perfect for interfac- ing to personal computers. The low-cost, greater than 14- bit high-resolution, and 100 µV sensitivity makes the TC835 exceptionally cost-effective. Microprocessor-based data acquisition systems are supported by the BUSY and STROBE outputs, along with the RUN/HOLD input of the TC835. The overrange, under- range, busy, and run/hold control functions and multiplexed BCD data outputs make the TC835 the ideal converter for µP-based scales and measurement systems and intelligent panel meters.* The TC835 interfaces with full-function LCD and LED display decoder/drivers. The UNDERRANGE and OVERRANGE outputs may be used to implement an auto- ranging scheme or special display functions. *See Application Notes 16 and 17 for microprocessor interface tech- niques. DATA BUS CONTROL ADDRESS BUS 6522 -VIA- PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 CA1 CA2 PB5 PB4 PB0 PB3 PB2 PB1 CHANNEL SELECTION GAIN SELECTION 1Y 2Y 3Y 1B 2B 3B SEL 1A 2A 3A 157 POL OR UR D5 B8 B4 B2 B1 D1 D2 D3 D4 STB R/H V + REF CAP BUF AZ INT INPUT + VR INPUT – ANALOG COMMON DGND 5V REF VOLTAGE 10 14 16 15 8 11 3 9 GAIN: 10, 20, 50, 100 15V 15V CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 DIFFERENTIAL MULTIPLEXER DG529 DA DB WR A1 A0 EN 5V + – – + fIN fIN LH0084 TC835 TYPICAL APPLICATION TC835-8 11/5/96 |
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