Datasheet

13
LT1055/LT1056
10556fc
TYPICAL APPLICATIO S
U
Temperature-to-Frequency Converter
LT1055/56 TA07
2
3
–15V
7
4
6
LT1055
15V
15V
560Ω
15V
–
+
LM329
510Ω
820Ω*
6.2k*
500Ω
0°C ADJ
2k
100°C
ADJ
6.2k*
1k*
1k*
2N2907
2N2222
0.01µF
POLYSTYRENE
510pF
2.7k
10k
10k
4.7k
2N2222
TTL OUTPUT
0kHz TO 1kHz =
0°C TO 100°C
2V
LM134
137Ω*
*1% FILM RESISTOR
100kHz Voltage Controlled Oscillator
–
+
–
+
–
+
–
+
X1
X2
U1
U2
COM
VR
Y1
Y2
+V
CC
W
Z1
Z2
GT
UP
–V
+15V
SINE OUT
2V
RMS
0kHs TO 100kHs
–15
AD639
2
3
15V
7
6
4
–15V
–15V
68k
68k
10k
4.5k22.1k
1k
LT1056
FINE
DISTORTION
TRIMS
15V
15V
15V
15V
–15V
–15V
–15V
–15V
LT1055/56 TA08
50k
10Hz
DISTORTION
TRIM
22M
POLYSTYRENE
500pF
7
4
3
2
6
LT1056
22k
15pF
HP5082-
2810
3
2
10k*
10k
1k
4.7k
4.7k
*1% FILM RESISTOR
=1N4148
FREQUENCY LINEARITY = 0.1%
FREQUENCY STABILITY = 150ppm/°C
SETTLING TIME = 1.7µs
DISTORTION = 0.25% AT 100kHz,
0.07% AT 10zHz
1k
5k
FREQUENCY
TRIM
LT1011
8
7
1
4
LM329
0.01µF
2.5k*
10k*
5k*
2N4391
2N4391
2N4391
6
7
4
15V
–15V
LT1056
100kHz
DISTORTION
TRIM
2k
9.09k*
0V TO 10V
INPUT
2
3
10k
20pF