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ADR445ARMZ Scheda tecnica(PDF) 17 Page - Analog Devices

Il numero della parte ADR445ARMZ
Spiegazioni elettronici  Ultralow Noise, LDO XFET Voltage References with Current Sink and Source
PDF  20 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

ADR445ARMZ Scheda tecnica(HTML) 17 Page - Analog Devices

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ADR440/ADR441/ADR443/ADR444/ADR445
Rev. A | Page 17 of 20
PRECISION OUTPUT REGULATOR
(BOOSTED REFERENCE)
ADR440/
ADR441/
ADR443/
ADR444/
ADR445
6
2
VIN
VOUT
RL
200Ω
CL
1µF
2N7002
–V
15V
VO
CIN
0.1µF
COUT
0.1µF
VIN
GND
4
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.



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