Datasheet

8
LT1462/LT1463
TYPICAL APPLICATIONS
U
Micropower 0.026% Frequency-to-Voltage Converter
13 14
4
16 17
12
C
S
1000pF
+
–
5V
–5V
2
3
8
1
4
1/2 LT1462
1/4 LTC
®
1043
0V TO 3V
OUTPUT
5V
–5V
C2
1µF
75k*
10k
GAIN TRIM
C1
1µF
f
IN
= FREQUENCY IN
0kHz TO 30kHz
R1
1k
V
REF
= –1.235V
LT1004-1.2
–5V
V
OUT
= (R2)(C
S
)(  V
REF
 )(f
IN
)
 TRW#MTR-5/120ppm
LT1462 • TA04
R2
*
10Hz 4th Order Chebyshev Lowpass Filter (0.01dB Ripple)
LT1462 • TA05
V
OUT
TYPICAL OFFSET ≈ 0.6mV
1% TOLERANCES
FOR V
IN
= 10V
P-P
,V
OUT
= –110dB AT f > 300Hz
V
OUT
= –6dB AT f = 16Hz
THE LOW INPUT BIAS CURRENTS ALLOW THE USE OF HIGH RESISTOR VALUES
R3
249k
C2
100nF
C1
33nF
R1
237k
V
IN
R2
237k
R6
249k
C4
330nF
12
13
–
+
1/4 LT1463
14
C3
10nF
R4
154k
R5
154k
4
1
15V
–15V
11
3
2
–
+
1/4 LT1463