Datasheet

LTC1043
4
1043fa
Oscillator Frequency, f
OSC
vs Ambient Temperature, T
A
(Test Circuits 2 through 4)
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Break-Before-Make Time, t
NOV
,
vs Supply Voltage
C
OSC
Pin I
SINK
, I
SOURCE
vs Supply Voltage
AMBIENT TEMPERATURE (°C)
–50
100
f
OSC
(kHz)
125
175
200
225
350
275
0
50
75
LTC1043 • TPC10
150
300
325
250
–25
25
100
125
C
OSC
= 0pF
V
+
= 10V, V
–
= 0V
V
+
= 5V, V
–
= 0V
V
+
= 15V, V
–
= 0V
0
0
PIN 16 SOURCE OR SINK CURRENT (µA)
25
50
75
100
2468
LTC1043 • TPC11
10 12 14 16 18
I
SINK,
T
A
= 25°C
I
SOURCE,
T
A
= –55°C
I
SOURCE,
T
A
= 25°C
I
SINK,
T
A
= 125°C
I
SOURCE,
T
A
= 125°C
I
SINK,
T
A
= –55°C
V
SUPPLY
(V)
0
10
t
NOV
(ns)
20
40
50
60
80
2
10
14
LTC1043 • TPC12
30
70
8
18
20
4
6
12 16
T
A
= 25°C
BLOCK DIAGRA
W
LTC1043 • BD01
12
11
3
2
C
B
–
C
B
+
SH
B
V
+
THE SWITCHES ARE TIMED AS SHOWN WITH PIN 16 HIGH
THE CHARGE BALANCING CIRCUITRY SAMPLES THE VOLTAGE
AT S3 WITH RESPECT TO S4 (PIN 16 HIGH) AND INJECTS A
SMALL CHARGE AT THE C
+
PIN (PIN 16 LOW).
THIS BOOSTS THE CMRR WHEN THE LTC1043 IS USED AS AN
INSTRUMENTATION AMPLIFIER FRONT END.
FOR MINIMUM CHARGE INJECTION IN OTHER TYPES OF
APPLICATIONS, S3A AND S3B SHOULD BE GROUNDED
V
–
CHARGE
BALANCING
CIRCUITRY
NON-OVERLAPPING
CLOCK
OSCILLATOR
10
CHARGE
BALANCING
CIRCUITRY
1
C
A
–
C
A
+
SH
A
C
OSC
S1A
7
13
6
18
16
4
17
8
14
15
5
S4A
S1B S2B
S4B
V
+
V
–
S2A
S3B
S3A
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