The AD7893 is a fast 12-bit, 6 µs ADC from Analog Devices that operates from a single +5 V supply and is housed in a small 8-pin mini-DIP and 8-pin SOIC. The part contains a 6 µs successive approximation A/D converter, an on-chip track/hold amplifier, an on-chip clock and a high speed serial interface. Output data from the AD7893 is provided via a high speed, serial interface port. This two-wire serial interface has a serial clock input and a serial data output with the external serial clock accessing the serial data from the part. In addition to traditional dc accuracy specifications such as lin- earity, full scale accuracy, and offset, the AD7893 also offers improved performance in terms of noise and distortion.
The AD7893 12‑bit ADC provides a 6 µs conversion time, on‑chip track/hold amplifier and a two‑wire high‑speed serial interface, all in an 8‑pin mini‑DIP or SOIC package. It operates from a single +5 V supply and consumes only 25 mW typical, making it suitable for battery‑powered applications.
The device is offered in four variants (AD7893‑10, ‑3, ‑5, ‑2) covering input ranges from ±10 V to 0‑5 V. It delivers up to 70 dB SNR, –80 dB THD and supports throughput rates up to 117 kHz. Detailed specifications, timing characteristics and pin functions are provided in the datasheet.
| Resolution | 12 bits |
|---|---|
| Conversion Time | 6 µs max |
| Typical Power Consumption | 25 mW |
| Supply Voltage | +5 V ±5% |
| Input Voltage Range (AD7893‑10) | ±10 V |
The AD7893 converts an analog input to a digital output in 6 µs maximum.
The device operates from a single +5 V supply with a tolerance of ±5 %.
Typical power dissipation is 25 mW, with a maximum of 45 mW.
It uses a two‑wire high‑speed serial interface with a clock (SCLK) and data (SDATA) line.