AFE78101
- Functional Safety-Capable
- Low quiescent current: 170 µA (typ)
- 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
- 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 AFE88101 and 14-bit AFE78101 ( AFEx8101) are highly-integrated, high-accuracy, extremely low-power digital-to-analog converters (DACs) with voltage outputs designed for sensor-transmitter applications.
The AFEx8101 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 devices include a 10‑ppm/°C voltage reference and a 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 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 a maximum quiescent current of 210 µA. The devices are specified over the temperature range of –40°C to +125°C, but are functional from –55°C to +125°C.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | AFEx8101 16-Bit and 14-Bit, Low-Power DACs With Voltage Reference and Diagnostic ADC for 4-mA to 20-mA Loop-Powered Applications datasheet | PDF | HTML | 2022. 12. 20 | |
| 애플리케이션 노트 | A Simple, Java-Based CRC Calculator | PDF | HTML | 2026. 3. 4 | ||
| Application brief | Ultra-Low-Power, Low-Voltage, 2-Wire, 4- to 20-mA Loop Transmitter Using AFE881H | PDF | HTML | 2023. 3. 3 | ||
| 기능 안전 정보 | AFE78101 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 2022. 8. 22 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
AFE881H1EVM — AFE881H1 DAC, ADC 및 HART® 모뎀이 포함된 16비트 저전력 AFE용 평가 모듈
AFE881H1 평가 모듈(EVM)은 HART® 지원 센서 트랜스미터 애플리케이션을 위해 설계된 전압 출력을 갖춘 고집적, 고정밀, 초저전력, 16비트 디지털-아날로그 컨버터(DAC)인 AFE881H1을 평가하는 플랫폼입니다.
AFE881H1은 또한 고급 진단용 CRC(cyclic redundancy check) 오류 감지와 12비트 1kSPS ADC(아날로그-디지털 컨버터)도 갖추고 있습니다.
USB2ANY 인터페이스 툴(별도 판매)은 AFE88H1EVM과 GUI를 통합하고 사용하기 위해 필요합니다.
AFE881H1EVM-GUI — AFE881H1EVM GUI installer
ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| UQFN (RRU) | 24 | Ultra Librarian |