单路电压和电流输出的16位数模转器AD5758主要特性_功能框图以及评估板

 ADI公司的AD5758是单路电压和电流输出的16位数模转器(DAC),工作电压从-33V (AVSS)到+33V(AVDD1),16位性能,片上有诊断功能包括12位ADC,用户可编失调和增益,电流输出范围0 mA - 20 mA, 4 mA - 20 mA, 0 mA - 24 mA, ±20 mA, ±24 mA, −1 mA - +22 mA ,电压输出范围0 V - 5 V, 0 V - 10 V, ±5 V和±10 V,工作温度范围−40°C 到 +11°5C,主要用在过程控制,激励器控制,通路隔离的模拟输出,可编逻辑控制器(PLC)和分布式控制系统(DCS)以及HART网络连接.本文介绍AD5758产品亮点和主要特性,功能框图以及评估板EVAL-AD5758SDZ主要特性,电路图,材料清单和PCB设计图.

The AD5758 is a single-channel, voltage and current output digital- to-analog converter (DAC) that operates with a power supply range from −33 V (minimum) on AVSS to +33 V (maximum) on AVDD1 with a maximum operating voltage between the two rails of 60 V. On-chip dynamic power control (DPC) minimizes package power dissipation, which is achieved by regulating the supply voltage (VDPC+) to the VIOUT output driver circuitry from 5 V to 27 V using a buck dc-to-dc converter, optimized for minimum on-chip power dissipation. The CHART pin enables a HART® signal to be coupled onto the current output. The device uses a versatile 4-wire serial peripheral interface (SPI) that operates at clock rates of up to 50 MHz and is compatible with standard SPI, QSPI™, MICROWIRE™, DSP, and microcontroller interface standards. The interface also features an optional SPI cyclic redundancy check (CRC) and a watchdog timer (WDT). The AD5758 offers improved diagnostic features from its predecessors, such as output current monitoring and an integrated 12-bit diagnostic analog-to-digital converter (ADC). Additional robustness is provided by the inclusion of a fault protection switch on the VIOUT, +VSENSE, and −VSENSE pins.

AD5758产品亮点:

1. Range of diagnostic features, including integrated ADC.

2. DPC, using an integrated buck dc-to-dc converter for thermal management, enabling higher channel count in smaller size module housing.

3. Programmable power control (PPC) mode to enable faster settling time (15 μs typical).

4. 16-bit performance.

5. HART compliant.

AD5758主要特性:

16-bit resolution and monotonicity

DPC for thermal management

Current/voltage output available on a single terminal

Current output ranges: 0 mA to 20 mA, 4 mA to 20 mA, 0 mA to 24 mA, ±20 mA, ±24 mA, −1 mA to +22 mA

Voltage output ranges (with 20% overrange): 0 V to 5 V, 0 V to 10 V, ±5 V, and ±10 V User-programmable offset and gain

Advanced on-chip diagnostics, including a 12-bit ADC

On-chip reference

Robust architecture, including output fault protection

−40°C to +11°5C temperature range

32-lead, 5 mm × 5 mm LFCSP package

AD5758应用:

Process control

Actuator control

Channel isolated analog outputs

Programmable logic controller (PLC) and distributed control systems (DCS) applications

HART network connectivity

图1. AD5758功能框图

评估板EVAL-AD5758SDZ

This user guide describes the evaluation board for the AD5758, a functional safety certified, single-channel, voltage and current output, digital-to-analog converter (DAC) with on-chip dynamic power control (DPC) that minimizes package power dissipation. For full details on the AD5758, refer to the AD5758 data sheet. Consult the data sheet when using the EVAL-AD5758SDZ. The configuration of the various link options is explained in the Evaluation Board Hardware section. The installation of the companion software is discussed in the Software Quick Start Procedures section. The EVAL-AD5758SDZ, shown in Figure 1, requires the EVAL- SDP-CS1Z board. The EVAL-AD5758SDZ interfaces to the USB port of the PC via the EVAL-SDP-CS1Z board. Software that allows the user to easily program the AD5758, namely the Analysis|Control|Evaluation (ACE) software, is available with the EVAL-AD5758SDZ.

评估板EVAL-AD5758SDZ主要特性:

Full featured evaluation board for the AD5758

On-board 2.5 V ADR4525 reference

SPI ACE software for control

EVALUATION KIT CONTENTS

EVAL-AD5758SDZ evaluation board

EVAL-SDP-CS1Z

图2. 评估板EVAL-AD5758SDZ外形图

图3. 评估板EVAL-AD5758SDZ电路图(1):AD5758

图4. 评估板EVAL-AD5758SDZ电路图(2):AD5758电源和基准选择

图5. 评估板EVAL-AD5758SDZ电路图(3):SDP-S板连接,地址引脚和LDAC和RESET引脚

图6. 评估板EVAL-AD5758SDZ电路图(4):AD5758输出级

评估板EVAL-AD5758SDZ材料清单:

图7. 评估板EVAL-AD5758SDZ PCB设计图(1):顶层

图8. 评估板EVAL-AD5758SDZ PCB设计图(2):层1

图9. 评估板EVAL-AD5758SDZ PCB设计图(3):地和电源面,层2和层3

图10. 评估板EVAL-AD5758SDZ PCB设计图(4):层4