Product Details

The AD7709 is a complete analog front end for low frequency measurement applications. It contains a 16-bit - ADC, selectable reference inputs, three switchable matched excitation current sources, low-side power switches, and a digital I/O port. The 16-bit channel with PGA accepts fully differential, unipolar, and bipolar input signal ranges from 1.024  REFIN/128 to 1.024  REFIN. It can be configured as two fully differential input channels or four pseudo-differential input channels. Signals can be converted directly from a transducer without the need for signal conditioning. 

The device operates from a 32.768 kHz crystal with an on-chip PLL generating the required internal operating frequency. The output data rate from the part is software programmable. The p-p resolution from the part varies with the programmed gain and output data rate. 

The part operates from a single 3 V or 5 V supply. When operating from 3 V supplies, the power dissipation for the part is 3.75 mW. The AD7709 is housed in a 24-lead TSSOP package.

Product Features

• 16-Bit  - ADC

• Programmable Gain Front End

• Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz

• Update Rate

• VREF Select™ Allows Absolute and Ratiometric

• Measurement Capability

• ISOURCE Select™

• 16-Bit No Missing Codes

• 13-Bit p-p Resolution @ 20 Hz, 20 mV Range

• 16-Bit p-p Resolution @ 20 Hz, 2.56 V Range

• INTERFACE

• 3-Wire Serial

• SPI®, QSPI™, MICROWIRE™, and DSP Compatible

• Schmitt Trigger on SCLK

• POWER

• Specified for Single 3 V and 5 V Operation

• Normal: 1.25 mA Typ @ 3 V

• Power-Down: 7 A (32.768 kHz Crystal Running)

• ON-CHIP FUNCTIONS

• Rail-to-Rail Input Buffer and PGA

• Selectable Reference Inputs

• 3 Switchable, Ratioed Current Sources for

• VBE Measurements

• 4-Bit Digital I/O Port

• Low-Side Power Switches

Product Applications

• Sensor Measurement

• Temperature Measurement

• Pressure Measurements

• Weigh Scales

• Portable Instrumentation

• 4–20 mA Loops

Specifications

Actual product photos

Payment&Transportation

Official Certificate&Certificate

Multiple product supply

Company office environment

Warehouse Real Shot

Standard packaging

We also provide ：