ADS8864IDGSR

The ADS8864 is a 16-bit, 400 kSPS single-ended input analog-to-digital converter (ADC). This device operates with an external reference of 2.5V to 5V, providing a wide signal range without the need for additional signal conditioning. This reference voltage is set independently of and can exceed the analog power supply voltage (AVDD). The device provides a compatible SPI serial port. This serial port also supports daisy-chain operation for cascading multiple devices. An optional busy indicator bit enables easy synchronization with the digital host. This device supports unipolar single-ended analog inputs in the range of -0.1V to VREF + 0.1V. The device operation is optimized for extremely low-power operation. The power consumption is directly proportional to the speed. This feature makes the ADS8864 well-suited for lower-speed applications. The ADC power supply does not require an independent LDO.

Applications

• Automatic Test Equipment (ATE)
• Instrumentation and process control
• Precision medical equipment
• Low-power battery-powered instruments

Key features

• Sample rate: 400kHz
• No latency output
• Unipolar single-ended input voltage range: 0V to +VREF
• SPI-compatible serial interface with daisy-chain option
• Excellent AC and DC performance: SNR: 93dB, THD: –108dB; INL: ±1.0LSB (typical), ±2.0LSB (maximum); DNL: ±1.0LSB (maximum), 16-bit NMC
• Wide operating voltage range: AVDD: 2.7V to 3.6V; DVDD: 1.65V to 3.6V (independent of AVDD); REF: 2.5V to 5V (independent of AVDD)
• Operating temperature: -40°C to +85°C
• Low power dissipation: 2.6mW at 400kSPS; 0.65mW at 100kSPS; 65μW at 10kSPS
• Shutdown current (AVDD): 50nA
• Full-scale step settling to 16 bits: 1200ns
• Package: VSSOP-10 and VSON-10