The ADS1174 and ADS1178 are multiple delta-sigma analog-to-digital converters with four/octal simultaneous sampling channels and data rates up to 52k samples-per-second. These devices offer high-speed and low-power operation, as well as high-performance AC and DC performance.
The ADS1174 (quad) and ADS1178 (octal) are 16‑bit delta‑sigma analog‑to‑digital converters that support simultaneous sampling of four or eight channels. They offer selectable high‑speed (52 kSPS, 31 mW per channel) and low‑power (10 kSPS, 7 mW per channel) operating modes, SPI or Frame‑Sync serial interfaces, and operate over an extended temperature range.
The devices are supplied in an HTQFP‑64 PowerPAD™ package and include detailed electrical characteristics, pin assignments, and timing specifications for both SPI and Frame‑Sync protocols. The datasheet also contains layout recommendations for the PowerPAD thermal pad and an important notice regarding product warranties and usage restrictions.
| Resolution | 16 Bits |
|---|---|
| High‑Speed Data Rate | 52,734 SPS |
| Low‑Power Data Rate | 10,547 SPS |
| Analog Supply Voltage (AVDD) | 4.75 V – 5.25 V |
| Power Dissipation – High‑Speed | 135 – 210 mW |
| Power Dissipation – Low‑Power | 30 – 55 mW |
| Operating Temperature Range | ‑40 °C to +125 °C |
| Offset Drift | 2 µV/°C |
| Gain Drift | 2 ppm/°C |
| Passband Ripple | +0.005 dB |
| Stop‑Band Attenuation | 100 dB |
Two operating modes are provided: High‑speed mode (31 mW per channel at 52 kSPS) and Low‑power mode (7 mW per channel at 10 kSPS).
The device supports either SPI™ or Frame‑Sync serial interfaces.
Both devices are available in an HTQFP‑64 PowerPAD™ package.
The devices are specified to operate from ‑40 °C up to +125 °C.