LT1021 LINER [Linear Technology], LT1021 Datasheet - Page 12

• Manufacturer Part Number: LT1021
• Description: Precision Reference
• Manufacturer: LINER [Linear Technology]

LT1021
12
TYPICAL APPLICATIONS
V
V
+
IN
(V
OUT
Boosted Output Current
with No Current Limit
IN
LT1021-10
+ 1.8V)
–15V
GND
OUT
LT1021
GND
1.2k
TRIM
OUT
2-Pole Lowpass Filtered Reference
LT1021
GND
IN
R1
220
OUT
CMOS DAC with Low Drift Full-Scale Trimming**
36k
R1
R1
4.99k
1%
R2
40.2
1%
f = 10Hz
**
*
TC LESS THAN 200ppm/ C
NO ZERO ADJUST REQUIRED
WITH LT1007 (V
+
MYLAR
2N2905
REF
36k
1 F
R2
1021 TA05
10V AT
100mA
2 F
SOLID
TANT
7520, ETC
CMOS
DAC
U
0S
0.5 F
MYLAR
V
–
+
+
LT1001
60 V)
FB
V
V
I
OUT
OUT
IN
+ 2.8V
Boosted Output Current
with Current Limit
TOTAL NOISE
1Hz f 10kHz
2 V
30pF
*GLOWS IN CURRENT LIMIT,
RMS
DO NOT OMIT
D1*
LED
V
1021 TA13
–V
REF
–
+
LT1021
REF
LT1007C
GND
IN
R1
220
OUT
4.02K
**
CMOS LOGIC GATE**
*
1%
R3
FOR HIGHER FREQUENCIES C1 AND C2 MAY BE DECREASED
PARALLEL GATES FOR HIGHER REFERENCE CURRENT LOADING
+
f
IN
2N2905
8.2
1021 TA06
R4*
100
FULL-SCALE
ADJUST
10V AT
100mA
2 F
SOLID
TANT
2kHz*
10V
F.S.
LT1236 TA15
Operating 5V Reference from 5V Supply
15V
5 F
C1*
+
V
IN
Trimming 10V Units to 10.24V
IN
*MUST BE WELL REGULATED
LT1021-7
dV
Ultraprecise Current Source
1N914
dV
1N914
GND
OUT
–
IN
+
TRIM
LT1021-10
6
= 15mV
OUT
100
TRIM
V
C2*
5 F
8.5V
GND
–15V
OUT
15V
LT1001
V
7
4
–
= –15V*
17.4k
1%
IN
LT1021-5
–
+
COMPLIANCE = –13V TO 7V
4.32k
5k
V
REGULATION < 1ppm/V
GND
OUT
2
3
1021 TA12
OUT
= 10.24V
I
OUT
= 1mA
*LOW TC
5V
REFERENCE
6.98k*
0.1%
5V LOGIC
SUPPLY
1021 TA16
1021 TA07