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AD5421BREZ

16-bit loop-powered 4-20mA DAC, 0.05% TUE, SPI 30MHz, HART compatible, 28-TSSOP

3210

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制造商零件：

AD5421BREZ

包装：

28-TSSOP w/ Exposed Pad (4.4 x 9.7 mm)

品牌：
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说明

产品概览

The AD5421BREZ from Analog Devices is a 16-bit, loop-powered, 4mA to 20mA digital-to-analog converter (DAC) designed for industrial process control and smart transmitter applications. It features 0.05% maximum total unadjusted error, integrated voltage regulator output, on-chip voltage references, HART compatibility, and SPI interface up to 30MHz, in a 28-lead TSSOP package.

主要规格

制造商 模拟器件公司
Resolution 16-bit
Output Range 4-20mA / 3.8-21mA / 3.2-24mA
Total Unadjusted Error 0.05% max (B/C grade)
INL Error 0.0035% FSR max
Loop Voltage Range 5.5V to 52V
静态电流 300uA max
Interface SPI-compatible (30MHz)
Regulated Output 1.8V to 12V
On-Chip References 1.22V and 2.5V
包装 28-TSSOP w/ EP
工作温度 -40°C to +105°C

特点

  • 16-bit resolution and monotonicity guaranteed
  • Pin-selectable NAMUR-compliant output ranges
  • Integrated regulated voltage output (1.8V to 12V)
  • On-chip 1.22V and 2.5V reference voltages
  • HART FSK protocol compatible
  • High-speed SPI interface up to 30MHz
  • Slew rate control function
  • On-chip fault alerts via FAULT pin or alarm current
  • Gain and offset adjustment registers
  • Output temperature coefficient: 3ppm/°C typical

应用

  • Industrial process control 4-20mA loop-powered transmitters
  • Smart transmitters with HART communication
  • Factory automation and instrumentation
  • Building automation systems
  • Field instruments with digital communication

The Analog Devices AD5421BREZ is a complete, loop-powered, 4mA to 20mA digital-to-analog converter designed for smart transmitter manufacturers in the industrial control industry. It provides a high-precision, fully integrated, low-cost solution in a compact 28-lead TSSOP package. The AD5421 includes a regulated voltage output that powers itself and other transmitter devices, providing 1.8V to 12V regulated output. Built-in 1.22V and 2.5V references eliminate the need for discrete regulators and voltage references. The device supports HART FSK protocol communication without performance degradation. The SPI-compatible serial interface operates at up to 30MHz for fast data transfers. With 0.0015% typical INL and 0.0006% typical gain error, the AD5421 delivers exceptional accuracy for demanding process control applications.

The AD5421 operates as a loop-powered DAC with four key subsystems: 1) 16-Bit DAC Core: The R-2R ladder network converts the digital input code into an analog current that drives the loop output through a precision output amplifier. The DAC guarantees 16-bit monotonicity with INL of 0.0035% FSR maximum (B/C grade). 2) Voltage Regulator: An integrated regulator provides 1.8V to 12V output from the loop supply, powering the AD5421 and external circuitry. The regulated output is selectable via REG_SEL pins. 3) Reference System: On-chip 1.22V and 2.5V bandgap references with 4ppm/°C maximum temperature coefficient ensure stable output accuracy. An external reference can also be used for higher precision. 4) Loop Interface: The device connects in series with the 4-20mA current loop, regulating the loop current based on the DAC code. The slew rate control function limits the rate of loop current change, and NAMUR-compliant alarm currents provide fault indication.

针脚 名称 类型 功能
1 REGOUT 输出 Regulated voltage output (1.8V to 12V)
2 REGIN 电源 Regulator input from loop supply
3-4 LOOP- 电源 Loop return connection
5 VLOOP 输入 Loop voltage monitor input
6 REFOUT1 输出 1.22V reference output
7 REFOUT2 输出 2.5V reference output
8 REFIN 输入 External reference input
9 CINR Capacitor Internal reference filter capacitor
10 EXT1 输入 External NMOS gate drive
11 EXT2 输入 External NMOS source connection
12-13 RANGE0/RANGE1 输入 Output current range select
14 故障 输出 Fault status output (active low)
15 ALARM_CURRENT_DIR 输入 Alarm current direction select
16 LDAC 输入 Load DAC (active low)
17 同步 输入 SPI frame synchronization (active low)
18 SCLK 输入 SPI serial clock input
19 SDIN 输入 SPI serial data input
20 SDO 输出 SPI serial data output
21-23 REG_SEL0-2 输入 Regulated output voltage select
24 RSET 输入 External RSET connection (24kOhm)
25 DVDD 电源 Digital supply (1.71V to 5.5V)
26 DDIO 电源 Digital I/O supply
27 COM 地面 Common ground
28 REGOUT 输出 Regulated voltage output (connected to pin 1)
  • 4-20mA loop-powered smart transmitters in industrial process control
  • HART-enabled field instruments with digital communication overlay
  • Factory automation and distributed control system analog output modules
  • Building automation HVAC and environmental monitoring transmitters
  • Petrochemical and oil/gas field instrumentation
制造商 部件编号 包装 说明
ADI AD5421BCPZ-REEL7 32-LFCSP (5x5mm) Same function, LFCSP package
ADI AD421BRZ 28-TSSOP 16-bit, 4-20mA loop-powered DAC
TI DAC8750IPW 20-TSSOP 16-bit, 4-20mA loop-powered DAC
ADI AD5422BCPZ-REEL7 40-LFCSP 16-bit, voltage/current output DAC
ADI AD5410ACPZ-REEL7 24-LFCSP 12/16-bit, loop-powered DAC
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认证
我们获得了多项专业认证，并建立了自己的专业检测实验室，确保交付给客户的每一件产品都符合最高质量要求。我们严格按照流程进行检测，确保产品质量稳定、参数准确。为保证原装正品，我们还与可靠的第三方检测机构合作，进行严格的质量检测。我们始终高度重视质量，完全符合行业标准、相关法规和 ISO 9001:2015 的要求。.

发货与付款

我们从合作供应链采购的所有电子元件都经过严格的进货检验。通过仔细的测试，我们确保交付给客户的所有产品都是原装正品，符合质量要求。此外，我们还保存完整的检验记录，使整个供应链流程清晰可查。.

认证
我们获得了多项专业认证，并建立了自己的专业检测实验室，确保交付给客户的每一件产品都符合最高质量要求。我们严格按照流程进行检测，确保产品质量稳定、参数准确。为保证原装正品，我们还与可靠的第三方检测机构合作，进行严格的质量检测。我们始终高度重视质量，完全符合行业标准、相关法规和 ISO 9001:2015 的要求。.

服务与包装

我们从合作供应链采购的所有电子元件都经过严格的进货检验。通过仔细的测试，我们确保交付给客户的所有产品都是原装正品，符合质量要求。此外，我们还保存完整的检验记录，使整个供应链流程清晰可查。.

认证
我们获得了多项专业认证，并建立了自己的专业检测实验室，确保交付给客户的每一件产品都符合最高质量要求。我们严格按照流程进行检测，确保产品质量稳定、参数准确。为保证原装正品，我们还与可靠的第三方检测机构合作，进行严格的质量检测。我们始终高度重视质量，完全符合行业标准、相关法规和 ISO 9001:2015 的要求。.

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