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The 8-bitADC0820CCN CMOS A/D offers a 1.5 μs conversion time and dissipates only 75 mW of power. The half-flash technique consists of 32 comparators, a most significant 4-bit ADC and a least significant 4-bit ADC. The input to the ADC0820 is tracked and held by the input sampling circuitry eliminating the need for an external sample-and-hold for signals moving at less than 100 mV/μs. For ease of interface to microprocessors, the ADC0820 has been designed to appear as a memory location or I/O port without the need for external interfacing logic.
ADC0820CCN Pinout
ADC0820CCN Pin Configuration
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | Vin | Voltage Input |
| 2 | DB0 | Tri-State Output Bit 0 |
| 3 | DB1 | Tri-State Output Bit 1 |
| 4 | DB2 | Tri-State Output Bit 2 |
| 5 | DB3 | Tri-State Output Bit 3 |
| 6 | WR/RDY | Write/Ready Mode |
| 7 | MODE | Mode Selection |
| 8 | RD | Read (Active Low) |
| 9 | INT | Interrupt (Active Low) |
| 10 | GND | Ground |
| 11 | Vref- | Voltage Reference Negative Input |
| 12 | Vref+ | Positive Voltage Reference Input |
| 13 | CS | Chip Select (Active Low) |
| 14 | DB4 | Tri-State Data Output Bit 4 |
| 15 | DB5 | Tri-State Data Output Bit 5 |
| 16 | DB6 | Tri-State Data Output Bit 6 |
| 17 | DB7 | Tri-State Data Output Bit 7 |
| 18 | OFL | Overflow Output (Active Low) |
| 19 | NC | Not Connected |
| 20 | Vcc | Power Supply Voltage |
ADC0820CCN Features
- Built-in track-and-hold function
- No missing codes
- No external clocking
- Single supply—5 VDC
- Easy interface to all microprocessors, or operates stand-alone
- Logic inputs and outputs meet both MOS and T2L voltage level specifications
- Operates ratiometrically or with any reference value equal to or less than VCC
- 0V to 5V analog input voltage range with single 5V supply
- No zero or full-scale adjust required
- Overflow output available for cascading
- 0.3″ standard width 20-pin DIP
ADC0820CCN Specifications
- Resolution 8 Bits
- Conversion Time 2.5 μs Max (RD Mode) 1.5 μs Max (WR-RD Mode)
- Low Power 75 mW Max
- Total Unadjusted Error ±1⁄2 LSB and ± 1 LSB
Application
- Telecom A/D Converter
- Multiple Input Channels
- Fast Infinite Sample-and-Hold
You can download this datasheet for ADC0820CCN 8-bit A/D Converter with track/hold from the link given below:
