LT1028 LINER [Linear Technology], LT1028 Datasheet - Page 15

• Manufacturer Part Number: LT1028
• Description: Ultra Low Noise Precision High Speed Op Amps
• Manufacturer: LINER [Linear Technology]

+INPUT
–INPUT
GAIN = 1000, BANDWIDTH = 1MHz
INPUT REFERRED NOISE = 1.5nV/ Hz AT 1kHz
WIDEBAND NOISE –DC to 1MHz = 3 V
IF BW LIMITED TO DC TO 100kHz = 0.55 V
1.ASSUME VOLTAGE NOISE OF LT1028 AND 7.5
2.GAIN WITH n LT1028s IN PARALLEL = n
3.OUTPUT NOISE = n 200 0.9nV/ Hz.
4.INPUT REFERRED NOISE =
5.NOISE CURRENT AT INPUT INCREASES n TIMES.
6.IF n = 5, GAIN = 1000, BANDWIDTH = 1MHz, RMS NOISE, DC TO 1MHz =
TYPICAL
Low Noise, Wide Bandwidth Instrumentation Amplifier
7.5
Paralleling Amplifiers to Reduce Voltage Noise
7.5
7.5
+
–
+
–
LT1028
LT1028
A
820
820
–
+
–
+
+
–
PPLICATI
LT1028
LT1028
LT1028
A1
A2
An
OUTPUT NOISE
470
470
470
n 200
50
10
RMS
RMS
68pF
68pF
300
300
200.
=
1.5k
1.5k
1.5k
0.9
O
n
SOURCE RESISTOR = 0.9nV/ Hz.
nV/ Hz.
U
10k
–
+
LT1028
+
10k
–
LT1028
4.7k
2 V
5
= 0.9 V.
1028/1128 TA08
OUTPUT
1028/1128 TA03
OUTPUT
DRIVE
SINE
NORTHROP CORP.
GYRO TYPICAL–
GR-F5AH7-5B
•
10
100pF
TAPE HEAD
ALL RESISTORS METAL FILM
47k
MAG PHONO
10
Gyro Pick-Off Amplifier
INPUT
INPUT
2
3
Tape Head Amplifier
Phono Preamplifier
–
+
2
3
LT1028
+
–
499
–15V
15V
LT1028
787
4
7
31.6k
ALL RESISTORS METAL FILM
+
LT1028/LT1128
–
0.1 F
LT1028
6
6
0.1 F
0.33 F
1028/1128 TA07
OUTPUT
1k
100
10k
1028/1128 TA06
OUTPUT TO SYNC
DEMODULATOR
OUTPUT
15
1028/1128 TA09