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AD5420AREZ-RL7

16-bit 1A loop-powered DAC, 4-20mA, SPI, TSSOP-24

14590

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Pieza del fabricante：

AD5420AREZ-RL7

Paquete：

TSSOP-24 (7.8x4.4mm)

Marca：
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Descripción

Productos

The AD5420AREZ-RL7 from Analog Devices is a 16-bit loop-powered 4-20mA DAC with SPI interface, designed for industrial process control. Features integrated output fault detection and on-chip voltage reference in TSSOP-24.

Especificaciones

Resolution 16-bit
Salida 4-20mA / 0-24mA
Interface SPI
Accuracy +/-0.01% FSR
Supply 10.8-33V
Temp -40~105C

Características

  • 16-bit current output DAC
  • 4-20mA loop-powered operation
  • +/-0.01% FSR accuracy
  • Integrated fault detection
  • SPI interface
  • On-chip voltage reference

Aplicaciones

  • Industrial process control
  • 4-20mA current loop
  • PLC analog output modules
  • Valve positioners
  • Field instrument transmitters

The AD5420AREZ-RL7 from Analog Devices is a 16-bit loop-powered 4-20mA DAC with SPI interface, designed for industrial process control. Features integrated output fault detection and on-chip voltage reference in TSSOP-24.

The AD5420AREZ-RL7 is a 16-bit loop-powered 4-20mA DAC from Analog Devices in TSSOP-24, designed for industrial 2-wire 4-20mA current loop transmitters. The loop-powered architecture means the device draws all operating power from the current loop itself (no separate power supply): the loop current varies from 4mA (zero-scale) to 20mA (full-scale), and the device operates from the loop voltage (typically 12-36V). The 16-bit DAC core converts the SPI-written digital code to a precision voltage, which drives an internal V-to-I converter. The output current is IOUT = 4mA + (CODE/65536) x 16mA. The loop compensation pins (COMP1, COMP2) connect external capacitors (0.01uF + 0.1uF) that stabilize the feedback loop when driving long cable runs with high capacitance. The FAULT output indicates over-temperature, over-voltage, or open-loop conditions. The CLEAR pin asynchronously resets the output to 4mA (zero-scale) for safety shutdown. The LATCH pin allows synchronous update: data is shifted into the input register via SPI, then all DAC registers update simultaneously when LATCH transitions HIGH. The device achieves +/-0.01% FSR integral nonlinearity (INL), corresponding to 1.6uA accuracy at 20mA full-scale. The HART-compatible output impedance enables FSK modem signals to be superimposed on the 4-20mA current loop for digital communication per HART protocol.

Pin Nombre Tipo Función
1 GND Potencia Suelo
2 SDI Entrada SPI data input (MOSI)
3 SDO Salida SPI data output (MISO, daisy-chain)
4 FALLO Salida Fault status output (open-drain, active low)
5 CLEAR Entrada Asynchronous clear (sets output to zero-scale)
6 LATCH Entrada DAC latch (transparent when LOW, latched when HIGH)
7 SCLK Entrada SPI clock (up to 30MHz)
8 SYNC Entrada SPI chip select (active low)
9 COMP2 Analógico Loop compensation capacitor 2
10 COMP1 Analógico Loop compensation capacitor 1
11-16 Iout/RCV/GND/AVDD/DVDD Analog/Power Current output, return, supplies
  • Industrial process control
  • 4-20mA current loop
  • PLC analog output modules
  • Valve positioners
  • Field instrument transmitters
    • Fabricante Número de pieza Paquete Notas
    Dispositivos analógicos AD5421AREZ-RL7 TSSOP-24 16-bit loop-powered HART modem DAC
    Dispositivos analógicos AD5410AREZ-RL7 TSSOP-24 12-bit version, lower resolution
    Texas Instruments DAC8750ICPWR TSSOP-24 16-bit 4-20mA DAC, HART, SPI
    Maxim MAX5216BGEE+T QSOP-16 16-bit DAC, voltage output, SPI
    Dispositivos analógicos AD5721RBRUZ-RL7 TSSOP-24 12-bit 4-20mA DAC with on-chip reference
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