Datasheet

8
LT1635
Reference
Typical Distribution
of Initial Accuracy
REFERENCE VOLTAGE (mV)
194
0
PERCENT OF UNITS
4
6
8
10
12
14
196
198
200 202
1635 G28
204
16
18
20
2
206
V
S
= 5V, 0V
T
A
= 25°C
Load Regulation
SOURCING CURRENT (mA)
0
REFERENCE CHANGE (ppm)
200
0
4
1635 G30
400
600
1
2
3
200
V
S
= 5V, 0V
T
A
= 25°C
Line Regulation
SUPPLY VOLTAGE (V)
0
REFERENCE OUTPUT (mV)
207
6
1635 G29
204
202
24 8
201
200
208
206
205
203
10 12 14
V
S
= 5V, 0V
T
A
= –55°C
T
A
= 125°C
T
A
= 25°C
Reference Output vs Temperature
of Two Typical Units
Reference Amplifier Gain
TEMPERATURE (°C)
–50
REFERENCE OUTPUT (mV)
100
1635 G31
050
205
204
203
202
201
25 25 75 125
V
S
= ±5V
Output Saturation
vs Load Current (Sourcing)
SOURCING CURRENT (mA)
0
0.5
OUTPUT SATURATION VOLTAGE (V)
0.7
0.8
0.9
1.0
1.1
1.2
1
2
1635 G32
1.3
1.4
1.5
0.6
3
V
S
= 5V, 0V
T
A
= –55°C
T
A
= 25°C
T
A
= 125°C
FREQUENCY (Hz)
1
GAIN (dB)
100
1k
1635 G33
40
0
10 100 10k
–20
–40
120
80
60
20
100k 1M 10M
V
S
= 5V, 0V
T
A
= 25°C
BLOCK DIAGRA
W
+
OP AMPINPUTS
+
REF AMP
V
4
V
+
7
REFERENCE
FEEDBACK
REFERENCE
OUTPUT
200mV
REFERENCE
8
1
OUTPUT
BALANCE
6
5
1635 BD
2
3
+
TYPICAL PERFOR A CE CHARACTERISTICS
UW