ADR441ARZ View Datasheet(PDF) - Analog Devices

Part Name

Description

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ADR441ARZ

Ultralow Noise, LDO XFET Voltage References with Current Sink and Source

Analog Devices 

PRECISION OUTPUT REGULATOR

(BOOSTED REFERENCE)

VIN

CIN

0.1µF

2

VIN

ADR440/

ADR441/

ADR443/

ADR444/

ADR445

VOUT 6

GND

4

COUT

0.1µF

15V

–V

2N7002

RL

200Ω

VO

CL

1µF

Figure 41. Boosted Output Reference

Higher current drive capability can be obtained, without

sacrificing accuracy, by using the circuit in Figure 41. The

operational amplifier regulates the MOSFET turn-on, forcing

VO to equal the VREF. Current is then drawn from VIN, allowing

increased current drive capability. The circuit allows a 50 mA

load; if higher current drive is required, use a larger MOSFET.

For fast transient response, add a buffer at VO to aid with

capacitive loading.

ADR440/ADR441/ADR443/ADR444/ADR445

Rev. A | Page 17 of 20

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