ADS7066

• Small solution size:
  • 1.62-mm × 1.62-mm WCSP
  • Space-saving, capless, 2.5-V internal reference
• 8 channels configurable as any combination of:
  • Up to 8 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: 91.9 dB, THD: –100 dB
  • Improved SNR with programmable averaging filters
  • INL: ±1 LSB, 16-bit no missing codes
  • Internal calibration improves offset and drift
  • High sample rate with no latency output:250 kSPS
• Wide operating range:
  • ADC input range: 0 V to V_REF and 2 x V_REF
  • Analog supply: 3 V to 5.5 V
  • Digital supply: 1.65 V to 5.5 V
  • Temperature range: –40°C to +125°C
• Enhanced-SPI digital interface:
  • High-speed, 60-MHz SPI interface

The ADS7066 is a small, 16-bit, 8-channel, high-precision successive-approximation register (SAR) analog-to-digital converter (ADC). The ADS7066 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 (800 kSPS) and the ADS7066 (250 kSPS) speed variants.

The ADS7066 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 ADS7066 can be individually configured as analog inputs, digital inputs, or digital outputs that enable smaller system size and simplify circuit design for mixed signal feedback and digital control.

The enhanced-SPI enables the ADS7066 in achieving high throughput at lower clock speeds, thereby simplifying the board layout and lowering system cost. The ADS7066 features a cyclic redundancy check (CRC) for data read and write operations and the power-up configuration.