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reference designAFE782H1 | Demoboard AFE782H1EVM

Texas Instruments AFE782H1 | Demoboard AFE782H1EVM

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

Overview

TopologyDAC
Input voltage0-2.5 V
IC revisionA

Description

The 16-bit AFE882H1 and 14-bit AFE782H1 (AFEx82H1) are highly-integrated, high-accuracy, extremely low-power DACs with voltage-outputs designed for HART-enabled process control and industrial automation applications.The AFEx82H1 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, these devices include a HART®-compliant 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. 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.

Features

Functional Safety-CapableDocumentation available to aid functional safety system designLow quiescent current: 180 µA (typical)HART-compliant physical layer modemProgrammable amplitude of TX signalsRX demodulator and band-pass filter16-bit or 14-bit monotonic high-performance DACDAC output range: 0 V to 2.5 VDigital DAC slew-rate control4-LSB INL at 16 bits0.07% FSR (max) TUE from –40°C to +125°C12-bit 3.84-kSPS ADC for advanced diagnosticsIntegrated 1.25-V reference at 10 ppm/°C (max)Internal 1.2288-MHz oscillator with clock outputDigital interfaceSerial peripheral interface (SPI): Shared bus for both DAC and HARTUniversal asynchronous receiver-transmitter (UART): Shared bus for both DAC and HARTBoth: SPI for DAC and UART for HARTFault detection: CRC bit error checking, windowed watchdog timer, diagnostic ADCWide operating temperature: –55°C to +125°C

Typical applications

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
IR(mA)
RDC(Ω)
Pins
Mount
L(mm)
H(mm)
Working Voltage(V (AC))
Operating Temperature
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR 2(mA)
RDC max.(Ω)
Type
SamplesAvailability & Sample
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742792116
SPECWE-CBF SMT EMI Suppression Ferrite Bead, 1800 mA, –
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
Rated Current1800 mA
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MountSMT 
Length3.2 mm
Height1.1 mm
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Operating Temperature -55 °C up to +125 °C
Impedance @ 100 MHz500 Ω
Maximum Impedance610 Ω
Maximum Impedance150 MHz 
Rated Current 22500 mA
DC Resistance0.06 Ω
TypeHigh Current 
–Check availability
782633601
SPECWE-CBA SMT EMI Suppression Ferrite Bead, 1000 mA, 0.2 Ω
Simu­lation
Availability
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Downloads10 files

RF & Microwave simulation models

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBA SMT EMI Suppression Ferrite Bead
Rated Current1000 mA
DC Resistance0.2 Ω
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MountSMT 
Length1.6 mm
Height0.8 mm
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Operating Temperature -55 °C up to +125 °C
Impedance @ 100 MHz600 Ω
Maximum Impedance660 Ω
Maximum Impedance190 MHz 
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–
TypeHigh Current 
–Check availability
61300211121
SPECWR-PHD Pin Header - Single, 3000 mA, –
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Single
Rated Current3000 mA
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Pins2 
MountTHT 
Length5.08 mm
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Working Voltage250 V (AC)
Operating Temperature -40 °C up to +105 °C
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–
–
–
–
TypeStraight 
–Check availability
61300311121
SPECWR-PHD Pin Header - Single, 3000 mA, –
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Single
Rated Current3000 mA
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Pins3 
MountTHT 
Length7.62 mm
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Working Voltage250 V (AC)
Operating Temperature -40 °C up to +105 °C
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–
–
–
–
TypeStraight 
–Check availability
61300621121
SPECWR-PHD Pin Header - Dual, 3000 mA, –
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Dual
Rated Current3000 mA
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Pins6 
MountTHT 
Length7.62 mm
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Working Voltage250 V (AC)
Operating Temperature -40 °C up to +105 °C
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–
–
–
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TypeStraight 
–Check availability
61301021121
SPECWR-PHD Pin Header - Dual, 3000 mA, –
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Dual
Rated Current3000 mA
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Pins10 
MountTHT 
Length12.7 mm
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Working Voltage250 V (AC)
Operating Temperature -40 °C up to +105 °C
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–
–
–
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TypeStraight 
–Check availability
61301421121
SPECWR-PHD Pin Header - Dual, 3000 mA, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Dual
Rated Current3000 mA
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Pins14 
MountTHT 
Length17.78 mm
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Working Voltage250 V (AC)
Operating Temperature -40 °C up to +105 °C
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–
–
–
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TypeStraight 
–Check availability