This document describes the features and characteristics of a low-power HART modem, including products such as a 4 mA to 20 mA and voltage output DAC, single-channel 12/16-bit serial input, 4 mA to 20 mA current source DAC, etc. The modem features HART compatibility, suitability for intrinsic safety applications, and an ultra-low power oscillator.
The AD5700/AD5700-1 are single-chip solutions designed to function as HART® FSK half-duplex modems compliant with the HART physical layer. These devices integrate all necessary filtering, signal detection, modulation, demodulation, and tone generation functions, requiring minimal external components.
The AD5700-1 features an integrated 0.5% precision oscillator to save board space, making it ideal for line-powered host and slave configurations. With a maximum power consumption of 115 µA in receive mode, these devices are the optimal choice for low-power loop-powered applications. They support 1200 Hz and 2200 Hz sine tone offset frequencies. This manual is written in Chinese.
| Supply Voltage (VCC) | 2 V to 5.5 V |
|---|---|
| Interface Supply Voltage (IOVCC) | 1.71 V to 5.5 V |
The device draws a maximum of 115 µA when operating in receive mode.
The device operates within a temperature range of -40°C to +125°C.
The modem uses 1200 Hz and 2200 Hz sine wave frequencies for transmission.