LT1634(RevF) 查看數據表（PDF） - Linear Technology

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LT1634
(Rev.:RevF)

Micropower Precision Shunt Voltage Reference

Linear Technology 

LT1634

Applications Information

The reverse characteristics of the LT1634 behave like

a resistor in parallel with a Zener diode. This simple,

well behaved characteristic is important to the proper

operation of circuits like Figure 1. The adjustable output

voltage reference depends upon positive feedback from

the LT1495’s output to start-up and regulate the bias cur-

rent for the LT1634.

RB

=

VOUT – 1.25V

10µA

VIN ≥ 10.5V

LT1634-1.25

+

LT1495

–

VOUT

1.5V TO 10V

R1

50k TO 1.75M

R2

250k

1634 F01

Figure 1. Adjustable Output Voltage Reference

Typical Applications

Reference for Micropower A/D Converter

5V

18k

LT1634-4.096

VIN

LTC1286

0.1µF

1 VREF

2

+IN

VCC 8

7

CLK

3 –IN

DOUT 6

4

5

GND CS/SHDN

µC/µP

SERIAL

INTERFACE

5V

0.1µF

1634 TA03

The LT1634-5 Generates the LTC1448 Dual 12-Bit

DAC’s Reference and Supply Voltage

7.5V TO 12V

3.48k

LT1634-5

µC/µP

SERIAL

INTERFACE

0.1µF

LTC1448

1

CLK

8

VOUTB

2

DIN

7

VCC

3

6

CS/LD GND

4

REF

5

VOUTA

VOUTB

0.1µF

VOUTA

1634 TA04

1634ff

10

For more information www.linear.com/LT1634

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