ADI AD7693BRMZ

The AD7693 is a 16-bit, successive approximation analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The reference voltage, V_REF, is applied externally and can be set up to the supply voltage, VDD. On the CNV rising edge, it samples the voltage difference between the IN+ and IN- pins. The voltages on these pins swing in opposite phase between 0V and V_REF about V_REF/2. Its power scales linearly with throughput. Using the SDI input, the SPI-compatible serial interface also features the ability to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIO supply. The AD7693 is housed in a 10-lead MSOP with operation specified from -40°C to +85°C.

• 16-bit resolution with no missing codes
• Throughput: 500 kSPS
• INL/DNL: ±0.25 LSB typ, ±0.5 LSB max (±8 ppm of FSR)
• Dynamic range: 96.5 dB
• SINAD: 96 dB at 1 kHz
• THD: −120 dB at 1 kHz
• True differential analog input range: ±V_REF 0 V to V_REF with V_REF up to VDD on both inputs
• No pipeline delay
• Single-supply 5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
• Proprietary serial interface SPI-/QSPI-/MICROWIRE-/DSP-compatible
• Daisy-chain multiple ADCs, selectable busy indicator
• Power dissipation: 40 nJ/conversion 40 μW at 5 V/1 kSPS 4 mW at 5 V/100 kSPS 18 mW at 5 V/500 kSPS
• Standby current: 1 nA
• 10-lead package: MSOP (MSOP-8 size)
• Pin-for-pin compatible with the 16-bit AD7687 and AD7688 and the 18-bit AD7690 and AD7691

• Battery-powered equipment
• Data acquisitions
• Seismic data acquisition systems
• DVMs
• Instrumentation
• Medical instruments