TI ADS7946SRTER

The ADS7945/6 are 14-bit, 2 MSPS analog-to-digital converters (ADCs) with differential and single-ended inputs respectively. These devices operate at a sampling rate of 2 MSPS with a standard 16-clock data frame. They feature outstanding DC accuracy and excellent dynamic performance. The ADS7946 is pin-compatible with the 8/10/12-bit ADS7947/8/9 devices.

These devices incorporate a 2-channel input multiplexer and a low-power successive approximation register (SAR) with an inherent sample-and-hold input stage. The ADS7945/6 support a wide analog supply range, and the allowable full-scale input range has been extended to ±5 V differential or 5 V single-ended. A simple SPI interface, with a digital supply that can operate at voltages as low as 1.65 V, can easily establish port connections with various digital controllers.

When operating at lower speeds, automatic power-down can be enabled to significantly reduce power consumption. Packaged in a tiny 3 mm × 3 mm QFN package, the ADS7945/6 are fully specified over a temperature range from -40°C to +125°C and are suitable for a variety of data acquisition applications where high performance, low power consumption, and small package size are critical.

• Sample Rate: 2 MSPS
• 14-bit, pin-compatible with 8/10/12-bit ADS7947/8/9 series (ADS7946)
• SNR: 84 dB (ADS7945); No Missing Codes; INL: 1.5 LSB (max) (ADS7945)
• 11.6 mW at 2 MSPS
• Automatic power reduction at lower speeds: 7.2 mW at 500 kSPS, 1.4 mW at 100 kSPS, 0.3 mW at 20 kSPS
• Analog: 2.7 V to 5.25 V, Digital: 1.65 V to AVDD
• Simple SPI interface
• Fully specified over -40°C to +125°C temperature range
• Compact package: 3 mm×3 mm QFN

• Fiber optic networks
• Medical instrumentation
• Battery-powered data acquisition systems