AD7690BRMZ
18位, 1.5 LSB INL , 400 kSPS时PulSAR®差分ADC ,采用MSOP / QFN 18-Bit, 1.5 LSB INL, 400 kSPS PulSAR® Differential ADC in MSOP/QFN
Product Details
The AD7690 is an 18-bit, successive approximation, analog-to-digital converter ADC that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. 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 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage.
The power of the AD7690 scales linearly with the throughput.
The SPI-compatible serial interface also features the ability, using the SDI input, 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 AD7690 is housed in a 10-lead MSOP or a 10-lead QFN LFCSP with operation specified from −40°C to +85°C.
**Applications**
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- Battery-powered equipment
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- Data acquisition
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- Seismic data acquisition systems
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- DVMs
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- Instrumentation
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- Medical instruments
### Features and Benefits
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- 18-bit resolution with no missing codes
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- Throughput: 400 kSPS
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- INL: ±0.75 LSB typ, ±1.5 LSB max ±6 ppm of FSR
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- Dynamic range: 102 dB @ 400 kSPS
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- Oversampled dynamic range: 125 dB @ 1 kSPS
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- Noise-free code resolution: 20 bits @ 1 kSPS
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- Effective resolution: 22.7 bits @ 1 kSPS
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- SINAD: 101.5 dB @ 1 kHz
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- THD: −125 dB @ 1 kHz
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- True differential analog input range: ±VREF 0 V to VREF with VREF up to VDD on both inputs
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- No pipeline delay
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- Single-supply 5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface