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ADS7945

Texas Instruments
Part Number ADS7945
Manufacturer Texas Instruments
Description Analog-to-Digital Converter
Published Sep 11, 2020
Detailed Description ADS7945 ADS7946 www.ti.com SBAS539B – JUNE 2011 – REVISED SEPTEMBER 2011 14-Bit, 2 MSPS, Dual-Channel, Differential/Si...
Datasheet PDF File ADS7945 PDF File

ADS7945
ADS7945

Overview
ADS7945 ADS7946 www.
ti.
com SBAS539B – JUNE 2011 – REVISED SEPTEMBER 2011 14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital Converters Check for Samples: ADS7945, ADS7946 FEATURES 1 •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 pe...


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