This document describes the Analog Devices AD7729, a dual Sigma-Delta ADC with an auxiliary DAC. The AD7729 is a low power, two-channel, input port with signal conditioning features. It features 15-bit Sigma-Delta A/D converters, 64 dB SNR output, programmable filters, and built-in calibration.
The AD7729 is a low‑power, dual‑channel sigma‑delta ADC with a 10‑bit auxiliary DAC, available in 28‑lead TSSOP and SOIC packages. It features a 3 V supply, 15‑bit resolution per channel, 270.83 kHz output word rate and built‑in offset calibration.
The document includes detailed electrical specifications, pin descriptions, timing diagrams, absolute maximum ratings, grounding and layout recommendations, and mechanical dimensions to aid designers in integrating the device into GSM basestations, pagers and other applications.
| Supply Voltage | +3 V |
|---|---|
| ADC Resolution | 15 bits |
| Auxiliary DAC Resolution | 10 bits |
| Output Word Rate | 270.83 kHz |
| Input Sample Rate | 13 MSPS |
| Signal‑to‑Noise Ratio | 64 dB |
| Dynamic Range | 67 dB |
| Operating Temperature Range | -40 °C to +105 °C |
The device operates from a +3 V supply.
The AD7729 provides an output word rate of 270.83 kHz.
Each ADC channel has a 15‑bit resolution.
It is rated for operation from –40 °C to +105 °C.