Datasheet LT1464, LT1465 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Dual/Quad Micropower, 1MHz C-Load Picoampere Bias Current JFET Input Op Amps |
| Pages / Page | 12 / 8 — TYPICAL APPLICATIONS. Low Voltage 0.016% Voltage to Frequency Converter |
| File Format / Size | PDF / 285 Kb |
| Document Language | English |
TYPICAL APPLICATIONS. Low Voltage 0.016% Voltage to Frequency Converter
Model Line for this Datasheet
Text Version of Document
LT1464/LT1465
U TYPICAL APPLICATIONS Low Voltage 0.016% Voltage to Frequency Converter
LT1009 R3 –5V V 1k REF = –2.5V C4 1µF 17 1/2 LTC®1043 5V 8 7 11 fOUT: 0kHz to 30kHz 14 13 1 VIN f ( )( ) OUT = (RIN)(CIN) VREF R 4 12 16 IN GAIN CIN 5V 2.5k 0.01µF 6.19k V 6 IN – 8 0V TO 5V 7 C1 1/2 LT1464 0.1µF 5 + 4 C2 30pF –5V R1 20k R3 330k Q1 2N2907A C3 1µF –5V LT1464 • TA03
10Hz 4th Order Chebyshev Lowpass Filter (0.01dB Ripple)
R2 237k R5 C1 154k 33nF C3 10nF 15V R1 R3 237k 249k 2 – 4 V R4 R6 IN 154k 249k 1 13 – C2 1/4 LT1465 + 100nF 3 14 1/4 LT1465 VOUT C4 11 + 330nF 12 LT1464 • TA05 –15V TYPICAL OFFSET ≈ 0.6mV 1% TOLERANCES FOR VIN = 10VP-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 8
U TYPICAL APPLICATIONS Low Voltage 0.016% Voltage to Frequency Converter
LT1009 R3 –5V V 1k REF = –2.5V C4 1µF 17 1/2 LTC®1043 5V 8 7 11 fOUT: 0kHz to 30kHz 14 13 1 VIN f ( )( ) OUT = (RIN)(CIN) VREF R 4 12 16 IN GAIN CIN 5V 2.5k 0.01µF 6.19k V 6 IN – 8 0V TO 5V 7 C1 1/2 LT1464 0.1µF 5 + 4 C2 30pF –5V R1 20k R3 330k Q1 2N2907A C3 1µF –5V LT1464 • TA03
10Hz 4th Order Chebyshev Lowpass Filter (0.01dB Ripple)
R2 237k R5 C1 154k 33nF C3 10nF 15V R1 R3 237k 249k 2 – 4 V R4 R6 IN 154k 249k 1 13 – C2 1/4 LT1465 + 100nF 3 14 1/4 LT1465 VOUT C4 11 + 330nF 12 LT1464 • TA05 –15V TYPICAL OFFSET ≈ 0.6mV 1% TOLERANCES FOR VIN = 10VP-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 8
