LT1793 Linear Technology, LT1793 Datasheet - Page 12

• Manufacturer Part Number: LT1793
• Description: Low Noise/ Picoampere Bias Current/ JFET Input Op Amp
• Manufacturer: Linear Technology

LT1793
TYPICAL APPLICATIONS
RELATED PARTS
PART NUMBER
LT1113
LT1169
LT1467
LT1792
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
DESCRIPTION
Low Noise, Dual JFET Op Amp
Low Noise, Dual JFET Op Amp
Micropower Dual JFET Op Amp
Low Noise, Single JFET Op Amp
V
IN
TYPICAL OFFSET 0.8mV
1% TOLERANCES
FOR V
LOWER RESISTOR VALUES WILL RESULT IN LOWER THERMAL NOISE AND LARGER CAPACITORS
100nF
237k
B & K MODEL 4381
ACCELEROMETER
R1
C2
IN
OR EQUIVALENT
[phone]
= 10V
10Hz Fourth Order Chebyshev Lowpass Filter (0.01dB Ripple)
U
P-P
249k
237k
R3
R2
, V
N
OUT
Accelerometer Amplifier with DC Servo
2
3
= – 6dB AT f = 16.3Hz
= –121dB AT f > 330Hz
–
+
LT1793
–15V
2
3
15V
100M
R1
–
+
–5V TO –15V
7
4
LT1793
5V TO 15V
33nF
C1
R3
2k
7
4
6
1
1250pF
1/2 LT1464
154k
R4
2 F
6
C2
C1
R4C2 = R5C3 > R1 (1 + R2/R3) C1
OUTPUT = 0.8mV/pC* = 8.0mV/g**
DC OUTPUT 1.9mV
OUTPUT NOISE = 8nV/ Hz AT 1kHz
**g = EARTH’S GRAVITATIONAL CONSTANT
*PICOCOULOMBS
–
+
154k
249k
C4
330nF
COMMENTS
Dual Version of LT1792, V
Dual Version of LT1793, V
1MHz, 2pA Max I
Lower V
R5
R6
18k
R2
2
3
2
3
NOISE
20M
20M
C3
2 F
R4
R5
–
+
LT1793
Version of LT1793, V
1793 TA03
10nF
B
C3
, 200 A Max I
OUTPUT
6
NOISE
NOISE
1793 TA04
V
OUT
= 4.5nV/ Hz
= 6nV/ Hz, I
S
LINEAR TECHNOLOGY CORPORATION 1999
NOISE
1793f LT/TP 0599 4K • PRINTED IN USA
= 4.2nV/ Hz
B
= 10pA