LT1236 LINER [Linear Technology], LT1236 Datasheet - Page 10

• Manufacturer Part Number: LT1236
• Description: Precision Reference
• Manufacturer: LINER [Linear Technology]

LT1236
15V
*
15V
10
TYPICAL APPLICATIONS
THIS RESISTOR PROVIDES POSITIVE FEEDBACK TO
THE BRIDGE TO ELIMINATE LOADING EFFECT OF
THE AMPLIFIER. EFFECTIVE Z
STAGE IS 1M . IF R2 TO R5 ARE CHANGED,
SET R6 = R3
IN
LT1236-10
*
GND
IN
TRIMS 1mA REFERENCE CURRENT
TC BY 40ppm/ C. THIS TRIM
SCHEME HAS VERY LITTLE EFFECT ON ROOM
TEMPERATURE CURRENT TO MINIMIZE ITERATIVE
TRIMMING
LT1236-10
OUT
357
1/2W
GND
R1
Precision DAC Reference with System TC Trim
6
OUT
1
LM301A
100pF 8
IN
1.24k
1%
8.87k
1%
OF AMPLIFIER
Strain Gauge Conditioner for 350 Bridge
28mA
†
+
–
10k
1%
3
D1
1N457
TC TRIM*
2
28.5mA
50k
U
10k
1%
**
50k
D2
1N457
†
BRIDGE IS ULTRA-LINEAR 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
–15V
5V
–5V
357
1/2W
50k
ROOM TEMP
TRIM
200k
1%
350 STRAIN
GAUGE BRIDGE**
20k
R2
20k
R4
10.36k
1%
1mA
R5
2M
DAC
2
3
–
+
2M
V
R6*
IN
LT1012C
2M
R3
8.45k
IN
LT1236 TA16
LT1236
GND
6
OUT
2-Pole Lowpass Filtered Reference
LT1236 TA08
V
X100
OUT
36k
R1
f = 10Hz
Negative Shunt Reference Driven
MYLAR
1 F
36k
R2
by Current Source
LM334
–11V TO – 40V
LT1236-10
0.5 F
MYLAR
–
+
GND
LT1001
OUT
V
2.5mA
IN
–10V (I
TOTAL NOISE
1Hz f 10kHz
2 V
27
LOAD
RMS
LT1236 TA13
LT1236 TA12
V
1mA)
–V
REF
REF