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.