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Microchip Technology - Personal Computer Data Acquisition A/D Converter

Numéro de référence TC835CKW
Description Personal Computer Data Acquisition A/D Converter
Fabricant Microchip Technology 
Logo Microchip Technology 





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TC835CKW fiche technique
TC835
Personal Computer Data Acquisition A/D Converter
Features
• Upgrade of Pin-Compatible TC7135, ICL7135
• 200kHz Operation
• Single 5V Operation With TC7660
• Multiplexed BCD Data Output
• UART and Microprocessor Interface
• Control Outputs for Auto-Ranging
• Input Sensitivity: 100µV
• No Sample and Hold Required
Applications
• Personal Computer Data Acquisition
• Scales, Panel Meters, Process Controls
• HP-IL Bus Instrumentation
Device Selection Table
Part Number Package Temperature Range
TC835CBU 64-PinPQFP
0°C to +70°C
TC835CKW 44-PinPQFP
0°C to +70°C
TC835CPI 28-Pin PDIP
0°C to +70°C
Note: Tape and Reel available for 44-Pin PQFP
package.
General Description
The TC835 is a low power, 4-1/2 digit (0.005%
resolution), BCD analog to digital converter (ADC) that
has been characterized for 200kHz clock rate opera-
tion. 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 resis-
tor rollover error compensation 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 100µV 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, UNDERRANGE, BUSY and RUN/
HOLD control functions, plus multiplexed BCD data
outputs, make the TC835 the ideal converter for µP-
based scales, 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.
© 2002 Microchip Technology Inc.
DS21478B-page 1

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