AD7985BCPZ-RL7

16位， 2.5 MSPS ， 15.5的PulSAR ADC毫瓦的LFCSP 16-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP

Product Details

The AD7985 is a 16-bit, 2.5 MSPS successive approximation analog-to-digital converter SAR ADC. It contains a low power, high speed, 16-bit sampling ADC, an internal conversion clock, an internal reference and buffer, error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7985 samples an analog input, IN+, between 0 V and REF with respect to a ground sense, IN−. The AD7985 features a very high sampling rate turbo mode TURBO is high and a reduced power normal mode TURBO is low for low power applications where the power is scaled with the throughput.

In normal mode TURBO is low, 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 provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, and 2.7 V supplies using the separate VIO supply.

The AD7985 is available in a 20-lead LFCSP with operation specified from −40°C to +85°C.

Applications

.

Battery-powered equipment

.

Communications

.

ATE

.

Data acquisition systems

.

Medical instruments

### Features and Benefits

.

16-bit resolution with no missing codes

.

Throughput: 2.5 MSPS TURBO high, 2.0 MSPS TURBO low

.

Low power dissipation

.

15.5 mW at 2.5 MSPS, with external reference

.

28 mW at 2.5 MSPS, with internal reference

.

INL: ±0.7 LSB typical, ±1.5 LSB maximum

.

SNR

.

88.5 dB, with on-chip reference

.

90 dB, with external reference

.

4.096 V internal reference: typical drift of ±10 ppm/°C

.

Pseudo differential analog input voltage range

.

0 V to VREF with VREF up to 5.0 V

.

Allows use of any input range

.

See data sheet for additional features