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AFE78201

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Low-power AFE with 14-bit DAC, 12-bit ADC for PLC and sensor transmitter applications

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Data sheet

AFE78201

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 14 Number of DAC channels 1 Interface type SPI Output type Voltage Features Integrated Temp Sensor Reference type INT/EXT Architecture STRING Rating Catalog Power consumption (typ) (mW) 0.561 Operating temperature range (°C) -55 to 125
Resolution (Bits) 14 Number of DAC channels 1 Interface type SPI Output type Voltage Features Integrated Temp Sensor Reference type INT/EXT Architecture STRING Rating Catalog Power consumption (typ) (mW) 0.561 Operating temperature range (°C) -55 to 125
UQFN (RRU) 24 16 mm² 4 x 4
  • Functional Safety-Capable
  • Low quiescent current: 170 µA (typical), 210 µA (maximum)
  • 16-bit or 14-bit monotonic high-performance DAC
    • DAC output range: 0 V to 2.5 V
    • Digital DAC slew-rate control
    • 4-LSB INL at 16 bits
    • 0.07% FSR (max) TUE from –40°C to +125°C
  • 12-bit 3.84-kSPS ADC for advanced diagnostics
  • Integrated 1.25-V reference at 10 ppm/°C (max)
  • Internal 1.2288-MHz oscillator with clock output
  • Digital interfaces:
    • Serial peripheral interface (SPI)
    • Universal asynchronous receiver-transmitter (UART)
  • Fault detection: CRC bit error checking, windowed watchdog timer, diagnostic ADC
  • Wide operating temperature: –55°C to +125°C
  • Functional Safety-Capable
  • Low quiescent current: 170 µA (typical), 210 µA (maximum)
  • 16-bit or 14-bit monotonic high-performance DAC
    • DAC output range: 0 V to 2.5 V
    • Digital DAC slew-rate control
    • 4-LSB INL at 16 bits
    • 0.07% FSR (max) TUE from –40°C to +125°C
  • 12-bit 3.84-kSPS ADC for advanced diagnostics
  • Integrated 1.25-V reference at 10 ppm/°C (max)
  • Internal 1.2288-MHz oscillator with clock output
  • Digital interfaces:
    • Serial peripheral interface (SPI)
    • Universal asynchronous receiver-transmitter (UART)
  • Fault detection: CRC bit error checking, windowed watchdog timer, diagnostic ADC
  • Wide operating temperature: –55°C to +125°C

The 16-bit AFE88201 and 14-bit AFE78201 ( AFEx8201) are highly-integrated, high-accuracy, extremely low-power digital-to-analog converters (DACs) with voltage outputs designed for process-control and industrial-automation applications.

The AFEx8201 devices include most of the components required to design a 4‑mA to 20‑mA, 3‑wire or 4-wire sensor transmitter or analog output module. In addition to the highly accurate DAC, the AFEx8201 incorporate a 10-ppm/°C voltage reference and diagnostic analog-to-digital converter (ADC). To accommodate intrinsic and functional-safety concerns, external voltage-to-current conversion and power-regulation are required.

The internal diagnostic ADC is multiplexed to several internal nodes that enable an automatic self-health check. This check is capable of detecting errors or malfunctions of the internal bias sources, power regulator, voltage reference, DAC output, die temperature, and optional external voltage source. If any fault is detected from the diagnostic ADC, CRC frame-error checking, or windowed watchdog timer, the devices can optionally issue an interrupt, enter a user-specified fail-safe state, or both.

The 16-bit AFE88201 and 14-bit AFE78201 ( AFEx8201) are highly-integrated, high-accuracy, extremely low-power digital-to-analog converters (DACs) with voltage outputs designed for process-control and industrial-automation applications.

The AFEx8201 devices include most of the components required to design a 4‑mA to 20‑mA, 3‑wire or 4-wire sensor transmitter or analog output module. In addition to the highly accurate DAC, the AFEx8201 incorporate a 10-ppm/°C voltage reference and diagnostic analog-to-digital converter (ADC). To accommodate intrinsic and functional-safety concerns, external voltage-to-current conversion and power-regulation are required.

The internal diagnostic ADC is multiplexed to several internal nodes that enable an automatic self-health check. This check is capable of detecting errors or malfunctions of the internal bias sources, power regulator, voltage reference, DAC output, die temperature, and optional external voltage source. If any fault is detected from the diagnostic ADC, CRC frame-error checking, or windowed watchdog timer, the devices can optionally issue an interrupt, enter a user-specified fail-safe state, or both.
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* Data sheet AFEx8201 16-Bit and 14-Bit Digital-to-Analog Converters (DACs) With Voltage Reference and Diagnostic ADC for Low-Power Applications datasheet PDF | HTML 06 May 2023
Functional safety information AFE78201 and AFE88201 FS FIT Rate FMD and Pin FMA PDF | HTML 06 May 2023

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