ADR421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(chǎn)的ADR421電壓基準產(chǎn)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 ADR3625ADR3630ADR3650 are low power, high precision

voltage references that feature a maximum temperature coefficient

of 3 ppm/°C for the B grade in an 8-lead MSOP. Capable of

sourcing up to 70 mA, the ADR3625ADR3630ADR3650 are an

exceptional replacement to standard low dropout (LDO) regulators.

For high accuracy, the output voltage and temperature coefficient

are trimmed during production using the Analog Devices, Inc.,

proprietary DigiTrim? technology.

The low thermal hysteresis (7 ppm) and low long-term drift

(160 ppm at 3500 Hr) improve system lifetime accuracy. A

minimum load capacitance of 0.1 μF is required for operation.

The ADR3625ADR3630ADR3650 is specified over the –40°C to

+125°C operating temperature range.

FEATURES

? Maximum temperature coefficient

? 3 ppm/°C (B grade)

? 6 ppm/°C (A grade)

? Output current capacity (typical): 70 mA sourcing and 20 mA

sinking

? Low quiescent current: 65 μA

? Low shutdown current: 1.5 μA

? Output voltage noise (0.1 Hz to 10 Hz): 3 ppm p-p

? Maximum initial output voltage error

? ±0.04 (B grade)

? ±0.08 (A grade)

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

? Maximum input voltage: 16 V

? Low dropout voltage

? 0.25 V for the ADR3625

? 0.15 V for the ADR3630 and ADR3650

? 1.8 V logic compatible

? 8-Lead MSOP package

APPLICATIONS

? Precision power supplies

? Portable instrumentation

? Process transmitters

? Remote sensors

? Medical instrumentation

? Auto battery monitors