1FEATURES

23• Sample Rate: 2 MSPS

• 14-Bit, Pin-Compatible with 8/10/12-bit

ADS7947/8/9 Family (ADS7946)

• Outstanding Performance:

– SNR: 84 dB (ADS7945)

– No Missing Codes

– INL: 1.5 LSB (max) (ADS7945)

• Low Power:

– 11.6 mW at 2 MSPS Operation

– Auto Power-Down at Lower Speeds:

– 7.2 mW at 500 kSPS

– 1.4 mW at 100 kSPS

– 0.3 mW at 20 kSPS

• Wide Supply Range:

– Analog: 2.7 V to 5.25 V

– Digital: 1.65 V to AVDD

• Simple Serial Interface (SPI)

• Fully Specified from –40°C to +125°C

• Tiny Footprint: 3 mm × 3 mm QFN

APPLICATIONS

• Optical Networking

• Medical Instrumentation

• Battery-Powered Equipment

• Data Acquisition Systems

DESCRIPTION

The ADS7945/6 are 14-bit, 2 MSPS analog-to-digital

converters (ADCs), with differential and single-ended

inputs, respectively. The devices operate at a 2

MSPS sample rate with a standard 16-clock data

frame. The devices feature both outstanding dc

precision and excellent dynamic performance; the

ADS7946 is pin-compatible with the 8/10/12-bit

ADS7947/8/9 devices. The devices include a

two-channel input multiplexer and a low-power

successive approximation register (SAR) ADC with

an inherent sample-and-hold (S/H) input stage.

The ADS7945/6 support a wide analog supply range

that allows the full-scale input range to extend to ±5 V

differential or 5 V single-ended. A simple SPI™, with

a digital supply that can operate as low as 1.65 V,

allows for easy interfacing to a wide variety of digital

controllers. Automatic power-down can be enabled when operating at slower speeds to dramatically

reduce power consumption.

Offered in a tiny 3 mm × 3 mm QFN package, the

ADS7945/6 are fully specified over the extended

temperature range of –40°C to +125°C and are

suitable for a wide variety of data acquisition applications where high performance, low power, and

small package size are key.