The AD7276/AD7277/AD7278 are 12-/10-/8-bit, high speed, low power, successive approximation analog-to-digital converters (ADCs), respectively. They operate from a single 2.35 V to 3.6 V power supply and feature throughput rates of up to 3 MSPS. The products have characteristics such as low noise, wide bandwidth, flexible power/serial clock speed management, no pipeline delays, and high speed serial interface.
The AD7276, AD7277 and AD7278 are high‑speed successive‑approximation ADCs offering up to 3 MSPS throughput, low power consumption and flexible serial interfaces (SPI, QSPI, Microwire, DSP‑compatible). They operate from a single supply of 2.35 V to 3.6 V and function over a temperature range of –40 °C to +125 °C.
The document includes a functional block diagram, product highlights, detailed electrical specifications, timing diagrams, pin‑out tables, typical performance curves, and application notes such as grounding, layout and microprocessor interfacing. Revision history and ordering information are also provided.
| Throughput Rate | 3 MSPS max |
|---|---|
| Resolution | 12 Bits (AD7276), 10 Bits (AD7277), 8 Bits (AD7278) |
| Power Consumption (Normal Mode, B‑Grade) | 12.6 mW typ at Vop = 3 V, 3 MSPS |
| Input Voltage Range | 0 to Vop |
| Operating Temperature Range | –40 °C to +125 °C |
The devices can sample at up to 3 MSPS (B‑grade) and 1 MSPS (Y‑grade).
In normal mode the B‑grade part consumes about 12.6 mW typ at 3 V supply and 3 MSPS.
The AD7276/AD7277/AD7278 are offered in 6‑lead TSOT and 8‑lead MSOP packages.
The devices operate from –40 °C up to +125 °C.