The AD7666 is a 16-bit 500 kSPS PulSAR® unipolar ADC with an internal 2.5 V reference, typical drift of 3 ppm/°C and guaranteed maximum drift of 15 ppm/°C.
The AD7666 is a 16‑bit, 500 kSPS charge‑redistribution SAR analog‑to‑digital converter that operates from a single 5 V supply. It features an internal 2.5 V reference, low power dissipation, and both parallel and 2‑wire serial interfaces compatible with 3 V and 5 V logic levels.
Available in 48‑lead LQFP and 48‑lead LFCSP packages, the device includes detailed pin‑out tables, timing specifications, absolute‑maximum ratings, and layout recommendations. The document also provides ordering information and application hints for bipolar or wider input ranges.
| Resolution | 16 Bits |
|---|---|
| Maximum Throughput | 500 kSPS |
| Integral Nonlinearity (INL) | +2.0 LSB max |
| Signal‑to‑Noise Ratio (SNR) | 88 dB min @ 20 kHz |
| Power Dissipation (typical, 500 kSPS, no REF) | 66 mW |
| Operating Temperature Range | -40 °C to +85 °C |
| Analog Input Voltage Range | 0 V to 2.5 V |
| Package Options | 48‑lead LQFP, 48‑lead LFCSP |
The AD7666 can sample at up to 500 kSPS.
The device is offered in 48‑lead LQFP and 48‑lead LFCSP packages.
Typical power dissipation is 66 mW at 500 kSPS when the internal reference is disabled.