AD7690BRMZ-RL7

ADC Single SAR 400KSPS 18Bit Serial 10Pin MSOP T/R

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**

.

Battery-powered equipment

.

Data acquisition

.

Seismic data acquisition systems

.

DVMs

.

Instrumentation

.

Medical instruments

### Features and Benefits

.

18-bit resolution with no missing codes

.

Throughput: 400 kSPS

.

INL: ±0.75 LSB typ, ±1.5 LSB max ±6 ppm of FSR

.

Dynamic range: 102 dB @ 400 kSPS

.

Oversampled dynamic range: 125 dB @ 1 kSPS

.

Noise-free code resolution: 20 bits @ 1 kSPS

.

Effective resolution: 22.7 bits @ 1 kSPS

.

SINAD: 101.5 dB @ 1 kHz

.

THD: −125 dB @ 1 kHz

.

True differential analog input range: ±VREF 0 V to VREF with VREF 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