Datasheet

8
LT1464/LT1465
TYPICAL APPLICATIONS
U
Low Voltage 0.016% Voltage to Frequency Converter
–
+
–5V
R3
1k
17
87
14 13
416
11
12
5V
LT1009
V
REF
= –2.5V
C4
1µF
1/2 LTC
®
1043
f
OUT
: 0kHz to 30kHz
C
IN

0.01µF
5V
–5V
6
5
8
7
4
C1
0.1µF
1/2 LT1464
C2
30pF
R1
20k
R3
330k
–5V
C3
1µF
Q1
2N2907A
6.19k
GAIN
2.5k
V
IN

0V TO 5V
LT1464 • TA03
R
IN
f
OUT
=
1
(R
IN
)(C
IN
)
V
IN

V
REF

(

(

))
10Hz 4th Order Chebyshev Lowpass Filter (0.01dB Ripple)
LT1464 • 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 LT1465
14
C3
10nF
R4
154k
R5
154k
4
1
15V
–15V
11
3
2
–
+
1/4 LT1465