ADS7946
14-Bit, 2MSPS, Dual-Channel, Unipolar, Pseudo-Differential, u-Power SAR ADC
ADS7946
- 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 kSPS1.4 mW at 100 kSPS0.3 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
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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | 14-Bit, 2-MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power ADCs datasheet (Rev. B) | 15 Sep 2011 | |
EVM User's guide | ADS794xEVM and ADS794xEVM-PDK User Guide (Rev. B) | 07 Sep 2017 | ||
E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 21 May 2015 | ||
Application note | Determining Minimum Acquisition Times for SAR ADCs, part 2 | 17 Mar 2011 | ||
Application note | Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) | 10 Nov 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
ADS7946 TINA-TI Transient Reference Design
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
WQFN (RTE) | 16 | Ultra Librarian |
Ordering & quality
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- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
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- Ongoing reliability monitoring
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Support & training
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