REF70集成電路（IC）的電壓基準(zhǔn)規(guī)格書PDF中文資料

REF70屬于集成電路（IC）的電壓基準(zhǔn)。由德州儀器制造生產(chǎn)的REF70電壓基準(zhǔn)產(chǎn)品屬于基準(zhǔn)電壓源系列，可通過相對較不穩(wěn)定的電源提供穩(wěn)定的電勢，電壓值始終保持恒定，以便在測量、控制和類似應(yīng)用中用作比較的標(biāo)準(zhǔn)。其功能行為可能與用于大功率調(diào)節(jié)的線性穩(wěn)壓器相似，但基準(zhǔn)電壓源器件卻不適合用于此類用途。用作比較標(biāo)準(zhǔn)時，若輸出電流容量或?qū)嶋H負(fù)載電流增大，其性能通常會降低。

1 Features

? Low noise enables precision measurements:

– 1/f Noise (0.1 Hz to 10 Hz): 0.23 ppmp-p

– 10 Hz to 1 kHz: 0.35 ppmrms

? Low temperature drift coefficient:

– 2 ppm/°C maximum (-40°C to 125°C)

? High accuracy: ±0.025 maximum

? Humidity resistant hermetic ceramic package

(LCCC)

? Excellent long-term stability (1k hr): 35 ppm

? Low dropout: 400 mV

? Designed for a wide range of applications:

– Wide input voltage up to 18 V

– Output current: ±10 mA

– Voltage options: 1.25 V, 2.5 V, 3 V, 3.3 V,

4.096 V, 5 V

? Ultra-flexible solution:

– Stable with 1-μF to 100-μF output low-ESR

capacitor

– High PSRR: 107 dB at 1 kHz

– Operating temperature range: ?40°C to +125°C

2 Applications

? Semiconductor test equipment

? Precision data acquisition systems

? Precision weight scales

? Ultrasound scanner

? X-ray systems

? Industrial instrumentation

? PLC analog I/O modules

? Field transmitters

? Power monitoring

3 Description

The REF70 is a family of high precision series voltage

references that offers the industry’s lowest noise

(0.23 ppmp-p), very low temperature drift coefficient

(2 ppm/°C), and high accuracy (±0.025). The

REF70 offers a high PSRR, low drop-out voltage

and excellent load and line regulation to help meet

strict transient requirements. This combination of

precision and features is designed for applications

such as test and measurement that demand a precise

reference to be paired with precision, high-resolution

data converters such as ADS8900B, ADS127L01 and

DAC11001A, to achieve optimal performance in the

signal chain. The REF70 is also designed for noisesensitive

medical applications such as ultrasound and

X-ray to help enable low-noise measurements from

the analog front end.

The REF70 family is available in VSSOP and LCCC

package options. The LCCC (FKH) package is a

hermetically sealed ceramic package that allows for

low, long-term drift for applications that require a

stable reference over a long time period without

calibration.

The REF70 is specified for the wide temperature

range of ?40°C to +125°C. The wide temperature

range enables operation across various industrial

applications.