AD7091R-2BCPZ-RL7

模数转换器 - ADC 2 chn 12 bit SAR ADC ref typical SPI

Product Details

The AD7091R-2/AD7091R-4/AD7091R-8 family is a multichannel 12-bit, ultralow power, successive approximation analog-to-digital converter ADC that is available in two, four, or eight analog input channel options. The AD7091R-2/AD7091R-4/ AD7091R-8 operate from a single 2.7 V to 5.25 V power supply and are capable of achieving a sampling rate of 1 MSPS.

The AD7091R-2/AD7091R-4/AD7091R-8 family offers up to eight single-ended analog input channels with a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially. The AD7091R-2/AD7091R-4/ AD7091R-8 also feature an on-chip conversion clock, an on-chip accurate 2.5 V reference, and a high speed serial interface.

The AD7091R-2/AD7091R-4/AD7091R-8 have a serial port interface SPI that allows data to be read after the conversion while achieving a 1 MSPS throughput rate. The conversion process and data acquisition are controlled using the CONVST pin.

The AD7091R-2/AD7091R-4/AD7091R-8 use advanced design techniques to achieve ultralow power dissipation at high throughput rates. They also feature flexible power management options. An on-chip configuration register allows the user to set up different operating conditions. These include power management, alert functionality, busy indication, channel sequencing, and general-purpose output pins. The MUXOUT and ADCIN pins allow signal conditioning of the multiplexer output prior to acquisition by the ADC.

**Applications**

.

Battery powered systems

.

Personal digital assistants

.

Medical instruments

.

Mobile communications

.

Instrumentation and control systems

.

Data acquisition systems

.

Optical sensors

.

Diagnostic/monitoring functions

### Features and Benefits

.

Ultralow system power

.

Flexible power/throughput rate management

.

High performance

.

1 MSPS throughput with no latency/pipeline delay

.

SNR: 70 dB typical at 10 kHz input frequency

.

THD: −80 dB typical at 10 kHz input frequency

.

INL: ±0.7 LSB typical, ±1.0 LSB maximum

.

Small system footprint

.

On-chip accurate 2.5 V reference, 5 ppm/°C typical drift

.

MUXOUT/ADCIN to allow single buffer amplifier

.

Daisy-chain mode

.

16-lead, 20-lead, and

24-lead 4 mm × 4 mm LFCSP packages

.

16-lead, 20-lead, and

24-lead TSSOP packages

.

See data sheet for additional features.