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Intersil
ICL7135 4+1/2 Digit BCD Output, A/D Converter
| Photograph |
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| Features |
- Accuracy Guaranteed to ±1 Count Over Entire ±20000 Counts
- Guaranteed Zero Reading for 0V Input
- 1pA Typical Input Current
- True Differential Input
- True Polarity at Zero Count for Precise Null Detection
- Single Reference Voltage Required
- Overrange and Underrange Signals Available for Auto-Range Capability
- All Outputs TTL Compatible
- Blinking Outputs Gives Visual Indication of Overrange
- Six Auxiliary Inputs/Outputs are Available for Interfacing to µP
- Multiplexed BCD Outputs
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| Pin Layout |
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| Pin Description |
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Pin Number
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Description
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1
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V- - Negative Supply
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2
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REF - Reference Input
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3
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ANALOG COMM - Analog Common
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4
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INT OUT - Integrator Output
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5
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AZ IN - Auto-Zero Input
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6
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BUFF OUT - Buffer Output
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7
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REF CAP- - Reference Capacitor
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8
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REF CAP+ - Reference Capacitor
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9
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IN LO - Input Low
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10
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IN HI - Input High
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11
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V+ - Positive Supply
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12
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D5 - Digit Drive
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13
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B1 - BCD Output
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14
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B2 - BCD Output
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15
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B4 - BCD Output
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16
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B8 - BCD Output
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17
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D4 - Digit Drive
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18
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D3 - Digit Drive
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19
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D2 - Digit Drive
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20
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D1 - Digit Drive
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21
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BUSY - A/D Busy
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22
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CLOCK IN - Clock Input
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23
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POL - Polarity Output
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24
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DIG GND - Digital Ground
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25
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R/H - Run/Hold
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26
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STR - Strobe
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27
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OR - Overrange
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28
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UR - Underrange
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| Dimensional Drawing |
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| Technical Data |
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Datasheet
Application Notes
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Integrated Circuits