Overview
The AD5757ACPZ-REEL7, produced by Analog Devices Inc., is a quad-channel, 16-bit digital-to-analog converter (DAC) designed for high-precision current output applications. This device features a versatile 3-wire serial interface compatible with standard SPI, QSPI, MICROWIRE, DSP, and microcontroller interface standards. It operates with a power supply range from 10.8 V to 33 V and supports current output ranges of 0 mA to 20 mA, 4 mA to 20 mA, or 0 mA to 24 mA. The AD5757 is particularly suited for industrial control systems, process control, and actuator control due to its robust specifications and features.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 16-bit |
| Current Output Ranges | 0 mA to 20 mA, 4 mA to 20 mA, or 0 mA to 24 mA |
| Total Unadjusted Error (TUE) | ±0.05% maximum |
| Temperature Range | −40°C to +105°C |
| Power Supply Range | 10.8 V to 33 V |
| Serial Interface | 3-wire serial interface, up to 30 MHz clock rate |
| Package Type | 64-pin LFCSP |
| On-chip Reference | ±10 ppm/°C maximum |
| Dynamic Power Control | Regulates voltage on output driver from 7.4 V to 29.5 V |
Key Features
- Dynamic power control for thermal management or external PMOS mode
- User programmable offset and gain
- On-chip diagnostics and on-chip reference (±10 ppm/°C maximum)
- HART network connectivity with corresponding CHART pins for each channel
- Optional CRC-8 packet error checking
- Alert and fault pins for monitoring system status
- Clear pin for setting output current and voltage to preprogrammed clear code bit setting
Applications
- Process control
- Actuator control
- Programmable logic controllers (PLCs)
- HART network connectivity
Q & A
- What is the resolution of the AD5757 DAC?
The AD5757 has a 16-bit resolution. - What are the current output ranges supported by the AD5757?
The AD5757 supports current output ranges of 0 mA to 20 mA, 4 mA to 20 mA, or 0 mA to 24 mA. - What is the temperature range of the AD5757?
The AD5757 operates within a temperature range of −40°C to +105°C. - What type of serial interface does the AD5757 use?
The AD5757 uses a 3-wire serial interface compatible with standard SPI, QSPI, MICROWIRE, DSP, and microcontroller interface standards. - Does the AD5757 support HART network connectivity?
Yes, the AD5757 supports HART network connectivity with corresponding CHART pins for each channel. - What is the purpose of the dynamic power control in the AD5757?
The dynamic power control regulates the voltage on the output driver from 7.4 V to 29.5 V to minimize package power dissipation. - How does the AD5757 handle fault detection?
The AD5757 has a fault pin that is asserted low when an open circuit in current mode, a short circuit in voltage mode, a PEC error, or an overtemperature is detected. - Can the AD5757 be used in PLCs?
Yes, the AD5757 is suitable for use in programmable logic controllers (PLCs). - What is the significance of the ALERT pin on the AD5757?
The ALERT pin is asserted high when there has been no SPI activity on the interface pins for a predetermined time. - How does the CLEAR pin function on the AD5757?
The CLEAR pin sets the output current and voltage to the preprogrammed clear code bit setting when asserted.
