AD7709BRUZ-REEL7

AD7709 is a complete analogue 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. 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. This device operates from a 32.768KHz 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. It is widely used in application such as sensor measurement, temperature measurement, pressure measurements, weigh scales, portable instrumentation, 4–20mA loops etc.

• No missing code is 16bits min, programmable gain front end
• 3-wire serial, SPI®, QSPI™, MICROWIRE™, and DSP compatible
• 13-bit p-p resolution at 20Hz, 20mV range, 16-bit p-p resolution at 20Hz, 2.56V range
• Specified for single 3V and 5V operation
• Power supply voltage is 2.7V to 3.6V
• Power-down is 7A (32.768KHz crystal running)
• Normal: 1.25mA typ at 3V, schmitt trigger on SCLK
• VREF Select™ allows absolute and ratiometric measurement capability
• Operating temperature is -40°C to +85°C
• Packaging style is TSSOP

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