参数资料
型号: LT1021BCH-5#PBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 基准电压源/电流源
英文描述: 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, MBCY8
封装: 0.200 INCH, LEAD FREE, METAL CAN, TO-5, 8 PIN
文件页数: 5/16页
文件大小: 228K
代理商: LT1021BCH-5#PBF
13
LT1021
1021fc
TYPICAL APPLICATIONS
U
Precision DAC Reference with System TC Trim
Strain Gauge Conditioner for 350
Bridge
Negative Shunt Reference Driven
by Current Source
LT1021-10
OUT
IN
GND
1021 TA17
15V
8.87k
1%
1.24k
1%
10k
1%
D1
1N457
50k
TC TRIM*
10k
1%
D2
1N457
50k
200k
1%
50k
ROOM TEMP
TRIM
10.36k
1%
8.45k
1mA
TRIMS 1mA REFERENCE CURRENT
TC BY
±40ppm/°C. THIS TRIM SCHEME HAS
VERY LITTLE EFFECT ON ROOM TEMPERATURE
CURRENT TO MINIMIZE ITERATIVE TRIMMING
*
DAC
Handling Higher Load Currents
LT1021-10
OUT
GND
IN
1021 TA08
RL
30mA
15V
R1*
169
VOUT
10V
TYPICAL LOAD
CURRENT = 30mA
SELECT R1 TO DELIVER TYPICAL LOAD CURRENT.
LT1021 WILL THEN SOURCE OR SINK AS NECESSARY
TO MAINTAIN PROPER OUTPUT. DO NOT REMOVE LOAD
AS OUTPUT WILL BE DRIVEN UNREGULATED HIGH. LINE
REGULATION IS DEGRADED IN THIS APPLICATION
*
LT1021-10
OUT
IN
GND
1021 TA09
+
+
LM301A
100pF
8
1
6
3
2
–5V
357
1/2W
–15V
R5
2M
R6*
2M
LT1012C
2
3
R4
20k
R2
20k
5V
R3
2M
VOUT
×100
350
STRAIN
GAUGE BRIDGE**
28mA
28.5mA
R1
357
1/2W
15V
THIS RESISTOR PROVIDES POSITIVE FEEDBACK TO
THE BRIDGE TO ELIMINATE LOADING EFFECT OF
THE AMPLIFIER. EFFECTIVE ZIN OF AMPLIFIER
STAGE IS
≥1M. IF R2 TO R5 ARE CHANGED,
SET R6 = R3
*
BRIDGE IS ULTRALINEAR WHEN ALL LEGS ARE
ACTIVE, TWO IN COMPRESSION AND TWO IN TENSION,
OR WHEN ONE SIDE IS ACTIVE WITH ONE COMPRESSED
AND ONE TENSIONED LEG
OFFSET AND DRIFT OF LM301A ARE VIRTUALLY
ELIMINATED BY DIFFERENTIAL CONNECTION OF LT1012C
**
LT1021-10
OUT
GND
1021 TA14
2.5mA
–10V (ILOAD ≤ 1mA)
–11V TO – 40V
27
LM334
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相关代理商/技术参数
参数描述
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