AD7705/AD7706 is a low power 2/3-channel 16-bit sigma-delta ADC that supports SPI, QSPI, MICROWIRE and DSP compatible, supports 2.7V-3.3V or 4.75V-5.25V power supply.
The AD7705 and AD7706 are complete analog front ends designed for low-frequency measurement applications. These devices accept low-level input signals directly from a transducer and produce a serial digital output using a sigma-delta conversion technique to achieve up to 16 bits of no missing codes performance.
The AD7705 features two fully differential input channels, while the AD7706 features three pseudo differential input channels. Both devices include a programmable gain front end with gains from 1 to 128 and operate on a single supply voltage ranging from 2.7 V to 3.3 V or 4.75 V to 5.25 V.
| Resolution | 16 Bits |
|---|---|
| Power Dissipation | 1 mW max @ 3 V |
| Supply Voltage Range (Low) | 2.7 V to 3.3 V |
| Supply Voltage Range (High) | 4.75 V to 5.25 V |
| Input Channels (AD7705) | Two Fully Differential |
| Input Channels (AD7706) | Three Pseudo Differential |
The maximum power dissipation is 1 mW when operating at a 3 V supply.
The AD7705 has two fully differential input channels, while the AD7706 has three pseudo differential input channels.
The devices provide up to 16 bits of no missing codes performance.