AD7091R-5BRUZ-RL7

模数转换器 - ADC 4 chn 12bit SAR ADC ref typical I2C

Product Details

The AD7091R-5 is a 12-bit, multichannel, ultralow power, successive approximation analog-to-digital converter ADC. The AD7091R-5 operates from a single 2.7 V to 5.25 V power supply and typically consumes only 24 µA at a 3 V supply in fast mode. 

The AD7091R-5 provides a 2-wire serial interface compatible with I2C interfaces. The conversion process can be controlled by a sample mode via the CONVST pin, an autocycle mode selected through software control, or a command mode in which conversions occur across I2C write operations.

The device contains a wide bandwidth track-and-hold amplifier that can handle input frequencies up to 1.5 MHz. The AD7091R-5 also features an on-chip conversion clock, an on-chip accurate 2.5 V reference, and a programmable out-of-bounds user alert function.

The AD7091R-5 offers four single-ended analog input channels with a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially.

The AD7091R-5 uses advanced design techniques to achieve ultralow power dissipation without compromising performance. It also features 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 before 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

.

I2C-compatible serial interface supports standard and fast modes

.

Ultralow power: 90 μW typical at 3 V in fast mode

.

Specified for VDD of 2.7 V to 5.25 V

.

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

.

4 single-ended analog input channels

.

ALERT function

.

BUSY function

.

Autocycle mode

.

Wide input bandwidth

.

68 dB signal-to-noise ratio SNR typical at input frequency of 1 kHz

.

Flexible power/throughput rate management

.

No pipeline delays

.

Power-down mode

.

550 nA typical at VDD = 5.25 V

.

435 nA typical at VDD = 3 V

.

20-lead LFCSP and TSSOP packages

.

Temperature range: −40°C to +125°C