The AD7656/AD7657/AD7658 is a 250 kSPS, 6-channel, simultaneous sampling, bipolar 16-/14-/12-bit ADC from Analog Devices.
The AD7656, AD7657 and AD7658 are six independent, simultaneous‑sampling ADCs built on Analog Devices' iCMOS process. They provide true bipolar analog inputs, selectable voltage ranges, on‑chip reference buffers and both parallel and high‑speed serial interfaces.
These converters are intended for power‑line monitoring, instrumentation and control systems, and multi‑axis positioning. They are supplied in a 64‑lead LQFP package and operate from a 5 V supply with a typical power dissipation of 140 mW at full speed.
| Number of ADCs | 6 |
|---|---|
| Throughput Rate | 250 kSPS |
| Power Dissipation (Operational) | 140 mW max |
| Input Voltage Range (+4×Vref) | 10 V to 16.5 V |
| Signal‑to‑Noise Ratio | 86.5 dB at 50 kHz |
| On‑chip Reference | Integrated reference and buffers |
The devices can sample at up to 250 kSPS.
Typical power consumption is 140 mW at 250 kSPS with a 5 V supply.
They support a +4×Vref range of 10 V to 16.5 V and a +2×Vref range of 5 V to 16.5 V.
The devices achieve an SNR of 86.5 dB at a 50 kHz input frequency.