ADR4525屬于集成電路（IC）的電壓基準。由亞德諾半導體技術有限公司制造生產的ADR4525電壓基準產品屬于基準電壓源系列，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、控制和類似應用中用作比較的標準。其功能行為可能與用于大功率調節(jié)的線性穩(wěn)壓器相似，但基準電壓源器件卻不適合用于此類用途。用作比較標準時，若輸出電流容量或實際負載電流增大，其性能通常會降低。

GENERAL DESCRIPTION

The AD3542R is a low drift, dual channel, ultra-fast, 16-bit accuracy,

voltage output digital-to-analog converter (DAC) that can be

configured in multiple voltage span ranges. The AD3542R operates

with a fixed 2.5 V reference.

The device incorporates three drift compensating feedback resistors

for the internal transimpedance amplifier (TIA) that scales the

output voltage. Offset and gain scaling registers allow for generation

of multiple output span ranges, such as 0 V to 2.5 V, 0 V to 5 V,

0 V to 10 V, ?5 V to +5 V, and ?2.5 V to +7.5 V.

The DAC can operate in fast mode for maximum speed or precision

mode for maximum accuracy.

The serial peripheral interface (SPI) can be configured in single

SPI (classic SPI) mode, dual SPI mode and synchronous dual SPI

mode with single date rate (SDR) or double data rate (DDR), with

logical levels from 1.2 V to 1.8 V.

To improve device robustness, cyclic redundancy check (CRC) can

be enabled. Multiple error checkers have also been integrated to

detect VREF failures or memory map corruption.

The AD3542R is specified over the extended industrial temperature

range (–40°C to +105°C).

FEATURES

? 16-bit resolution

? 16 MUPS single channel rate in fast mode

? 11 MUPS single channel rate in precision mode

? 78 ns small signal settling time to 0.1 accuracy

? 100 ns large signal settling time to 0.1 accuracy

? Ultrasmall glitch: <50 pV×s

? Ultralow latency: 5 ns

? THD: ?105 dB at 1 kHz

? Highly configurable output voltage span and offset

? 1.2 V and 1.8 V logic level compatible

? Single (classic) and dual SPI modes

? Multiple error detectors, both analog and digital domains

? 2.5 V internal voltage reference, 10 ppm/°C maximum temperature coefficient

? Small package: 4 mm × 4 mm LFCSP

APPLICATIONS

? Instrumentation

? Hardware in the loop

? Process control equipment

? Medical devices

? Automated test equipment

? Data acquisition system

? Programmable voltage sources

? Optical communications