The ADS7844 is an 8-channel, 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface. Typical power dissipation is 3mW at a 200kHz throughput rate and a +5V supply. The reference voltage (VREF) can be varied between 100mV and VCC, providing a corresponding input voltage range of 0V to VREF. The device includes a shutdown mode that reduces power dissipation to under 1µW. The ADS7844 is ensured down to 2.7V operation. Low power, high speed, and onboard multiplexer make the ADS7844 ideal for battery-operated systems such as personal digital assistants, portable multichannel data loggers, and measurement equipment. The serial interface also provides low-cost isolation for remote data acquisition. The ADS7844 is available in a 20-lead QSOP package and the MAX147 equivalent 20-lead SSOP package and is ensured over the –40°C to +85°C temperature range.
The ADS7844 is a 12‑bit, 8‑channel sampling analog‑to‑digital converter (ADC) that operates from a single 2.7 V to 5 V supply. It offers both single‑ended (8‑channel) and differential (4‑channel) inputs, up to 200 kHz conversion rate, low power consumption, and a synchronous serial interface suitable for battery‑powered and portable data‑acquisition applications.
The datasheet provides full electrical specifications, pin descriptions, package options (20‑lead QSOP and SSOP), typical performance curves, and mechanical dimensions. It also includes ordering information, ESD handling guidelines, and the standard TI product notice.
| Resolution | 12 bits |
|---|---|
| Supply voltage | 2.7 V to 5 V |
| Conversion rate | up to 200 kHz |
| Power dissipation | 45 mW (5 V version) |
| Input channels | 8 single‑ended or 4 differential |
| Missing codes | None |
The ADS7844 operates from a single supply voltage of 2.7 V to 5 V.
It provides eight single‑ended channels or four differential channels.
No, the device has no missing codes.
The converter can operate at up to 200 kHz conversion rate.