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MFG:HAR D/C:07+
Part Number: ICL7109
MFG: HAR
D/C: 07+
Description: The ICL7109 is a high performance, CMOS, low power integrating A/D converter designed to easily interface with micropro...
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ICL7109
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DataSheet
General Description
ICL7109 General Description
The ICL7109 is a high performance, CMOS, low power integrating A/D converter designed to easily interface with microprocessors.
The output data (12 bits, polarity and over-range) may be directly accessed under control of two byte enable inputs and a chip select input for a single parallel bus interface. A UART handshake mode is provided to allow the ICL7109 to work with industry-standard UARTs in providing serial data transmission. The RUN/HOLD input and STATUS output allow monitoring and control of conversion timing.
The ICL7109 provides the user with the high accuracy, low noise, low drift versatility and economy of the dual-slope integrating A/D converter. Features like true differential input and reference, drift of less than 1µV/oC, maximum input bias current of 10pA, and typical power consumption of 20mW make the ICL7109 an attractive per-channel alternative to analog multiplexing for many data acquisition applications.
ICL7109 Maximum Ratings
Positive Supply Voltage (GND to V+). . . . . . . . . . . . . . . . . . . . +6.0V
Negative Supply Voltage (GND to V-) . . . . . . . . . . . . . . . . . . . . . -9V
Analog Input Voltage (Either Input) (Note 1) . . . . . . . . . . . . V+ to V-
Reference Input Voltage (Either Input) (Note 1) . . . . . . . V+ to VDigital
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (V+) +0.3V
Pins 2-27 (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .GND -0.3V
ICL7109 Features
• 12-Bit Binary (Plus Polarity and Over-Range) Dual Slope Integrating Analog-to-Digital Converter
• Byte-Organized, TTL Compatible Three-State Outputs and HOLD Handshake Mode for Simple Parallel or Serial Interfacing to Microprocessor Systems
• RUN/HOLD Input and STATUS Output Can Be Used to Monitor and Control Conversion Timing
• True Differential Input and Differential Reference
• Low Noise (Typ) . . . . . . . . . . . . . . . . . . . . . . . . 15µVP-P
• Input Current (Typ) . . . . . . . . . . . . . . . . . . . . . . . . . .1pA
• Operates At Up to 30 Conversions/s
• On-Chip Oscillator Operates with Inexpensive 3.58MHz TV Crystal Giving 7.5 Conversions/s for 60Hz Rejection. May Also Be Used with An RC Network Oscillator for Other Clock Frequencies
• Byte-Organized, TTL Compatible Three-State Outputs and HOLD Handshake Mode for Simple Parallel or Serial Interfacing to Microprocessor Systems
• RUN/HOLD Input and STATUS Output Can Be Used to Monitor and Control Conversion Timing
• True Differential Input and Differential Reference
• Low Noise (Typ) . . . . . . . . . . . . . . . . . . . . . . . . 15µVP-P
• Input Current (Typ) . . . . . . . . . . . . . . . . . . . . . . . . . .1pA
• Operates At Up to 30 Conversions/s
• On-Chip Oscillator Operates with Inexpensive 3.58MHz TV Crystal Giving 7.5 Conversions/s for 60Hz Rejection. May Also Be Used with An RC Network Oscillator for Other Clock Frequencies
ICL7109 Connection Diagram
ICL7109
PDF/DataSheet Download
- Datasheet: ICL7109
- File Size: 874211 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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