AFE781H1RRUT
Active14-BIT LOW-POWER ANALOG FRONT END (AFE) WITH DAC, ADC AND HART® MODEM FOR SENSOR TRANSMITTERS
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AFE781H1RRUT
Active14-BIT LOW-POWER ANALOG FRONT END (AFE) WITH DAC, ADC AND HART® MODEM FOR SENSOR TRANSMITTERS
Technical Specifications
Parameters and characteristics for this part
| Specification | AFE781H1RRUT |
|---|---|
| Mounting Type | Surface Mount |
| Number of Bits | 12, 16, 14 |
| Number of Channels [custom] | 2 |
| Package / Case | 24-WFQFN |
| Supplier Device Package | 24-UQFN |
| Supplier Device Package [x] | 4 |
| Supplier Device Package [y] | 4 |
| Voltage - Supply, Analog [Max] | 1.89 V |
| Voltage - Supply, Analog [Min] | 1.71 V |
| Voltage - Supply, Digital [Max] | 5.5 V |
| Voltage - Supply, Digital [Min] | 1.71 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 250 | $ 9.37 | |
| 500 | $ 8.77 | |||
| Texas Instruments | SMALL T&R | 1 | $ 11.02 | |
| 100 | $ 8.98 | |||
| 250 | $ 7.06 | |||
| 1000 | $ 5.99 | |||
Description
General part information
AFE781H1 Series
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.
Documents
Technical documentation and resources