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Texas Instruments ADS7067 16-Bit SAR Analog-to-Digital Converter

Texas Instruments ADS7067 16-Bit SAR Analog-to-Digital Converter (ADC) is a small 8-channel, high-precision successive-approximation register (SAR) ADC. The ADS7067 has an integrated capless reference and a reference buffer that helps reduce the overall solution size by requiring fewer external components. The wafer-level-chip-scale package and fewer external components make this device suitable for space-constrained applications. The device family includes the ADS7067 (800kSPS) and the ADS7066 (250kSPS) speed variants.

The ADS7067 features built-in offset calibration for improved accuracy over wide operating conditions of the system. The programmable averaging filters enable higher resolution measurement. The eight channels of the ADS7067 can be individually configured as analog inputs, digital inputs, or digital outputs to allow smaller system sizes and simplify circuit design for mixed-signal feedback and digital control.

The enhanced SPI enables the ADS7067 to achieve high throughput at lower clock speeds, simplifying the board layout and lowering system cost. The Texas Instruments ADS7067 features a cyclic redundancy check (CRC) for data read and write operations and the power-up configuration.

Features

Small solution size
- 1.62mm × 1.62mm WCSP
- Space-saving, capless, 2.5V internal reference
Eight channels configurable as any combination of
- Up to eight analog inputs, digital inputs, or digital outputs
Programmable averaging filters
- Programmable sample size for averaging
- Averaging with internal conversions
- 20-bit resolution for average output
Low-leakage multiplexer with channel sequencer:
- Manual mode
- On-the-fly mode
- Auto-sequence mode

Excellent AC and DC performance
- SNR: 90dB, THD: –100dB
- Improved SNR with programmable averaging filters
- INL: ±1LSB, 16-bit no missing codes
- Internal calibration improves offset and drift
- High sample rate with no latency output (800kSPS)
Wide operating range
- 0V to V_REF and 2 × V_REF ADC input range
- 3V to 5.5V analog supply
- 1.65V to 5.5V digital supply
- –40°C to +125°C temperature range
Enhanced-SPI digital interface
- High-speed, 60MHz SPI interface

Applications

Optical modules
Optical line cards
Multiparameter patient monitors

Texas Instruments ADS7067 16-Bit SAR Analog-to-Digital Converter

Features

Applications

Functional Block Diagram

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