GUI for evaluation module (EVM)
AFE881H1EVM-GUI — AFE881H1EVM GUI installer
The AFE881H1EVM-GUI is a windows-based software GUI that controls the AFE881H1EVM through SPI communications using the USB2ANY interface adapter tool.
AFE881H1
16-bit low-power analog front end (AFE) with DAC, ADC and HART® modem for sensor transmitters
Data sheet
AFE881H1
- Functional Safety-Capable
- Low quiescent current: 180 µA (typical)
- HART-compliant physical layer modem
- 16-bit or 14-bit monotonic high-performance DAC
- 1.8-V supply: 0.15 V to 1.25 V, 0.2 V to 1.0 V
- 5-V supply: 0.3 V to 2.5 V, 0.4 V to 2.0 V
- 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 interface
- Serial peripheral interface (SPI): Shared bus for both DAC and HART
- Universal asynchronous receiver-transmitter (UART): Shared bus for both DAC and HART
- Both: SPI for DAC and UART for HART
- Fault detection: CRC bit error checking, windowed watchdog timer, diagnostic ADC
- Digital DAC slew-rate control
- Wide operating temperature: –55°C to +125°C
The 16-bit AFE881H1 and 14-bit AFE781H1 ( AFEx81H1) are highly-integrated, high-accuracy, extremely low-power digital-to-analog converters (DACs) with voltage outputs designed for HART-enabled sensor-transmitter applications.
The AFEx81H1 devices include most of the components required to design a 4‑mA to 20‑mA, 2‑wire (loop-powered) sensor transmitter. In addition to the highly accurate DAC, these parts include a HART-certified FSK modem, 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. 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 fail-safe state corresponding to a standard NAMUR output value or user-specified custom value, or both.
These devices operate from supplies as low as 1.71 V with 220 µA maximum quiescent current. The devices are specified over the temperature range of –40°C to +125°C, but are functional from –55°C to +125°C.
Technical documentation
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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | AFEx81H1 16-Bit and 14-Bit, Low-Power DACs With Internal HART® Modem, Voltage Reference, and Diagnostic ADC for 4-mA to 20-mA Loop-Powered Applications datasheet | PDF | HTML | 15 Mar 2023 |
| Application note | Design and Test of a HART-Enabled Field Transmitter for 4-20mA Loops | PDF | HTML | 17 Oct 2024 | |
| Application note | A Basic Guide to the HART Protocol | PDF | HTML | 09 Nov 2023 | |
| Application brief | Ultra-Low-Power, Low-Voltage, 2-Wire, 4- to 20-mA Loop Transmitter Using AFE881H | PDF | HTML | 03 Mar 2023 | |
| Certificate | AFE881H1EVM EU RoHS Declaration of Conformity (DoC) (Rev. A) | 09 Feb 2023 | ||
| Functional safety information | AFE881H1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 23 Sep 2022 |
Design & development
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User guide: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| UQFN (RRU) | 24 | Ultra Librarian |
Ordering & quality
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Information included:
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