Datasheet

LTC2057/LTC2057HV
25
2057f
For more information www.linear.com/LTC2057
Typical applicaTions
Ultra-Precision, 135dB Dynamic Range Photodiode Amplifier Output Noise Spectrum of Photodiode Amplifier
NOISE FLOOR IS ONLY SLIGHTLY ABOVE THE 20kΩ RESISTOR`S 18nV/√Hz.
CLOCK FEEDTHROUGH IS VISIBLE NEAR 100kHz WITH AMPLITUDE OF
10µV
RMS
OUTPUT REFERRED OR 0.5nA
RMS
INPUT REFERRED.
Wide Input Range Precision Gain-of-100 Instrumentation Amplifier
–
+
52V
–1V
68pF
PD
I
PD
V
OUT
20k
30pF
LTC2057HV
2057 TA06
V
OUT
= I
PD
• 20kΩ
BW = 300kHz
OUTPUT RANGE 9µV TO 50V, LIMIT BW TO 1kHz
TO KEEP OUTPUT NOISE BELOW 5µV
P-P
FREQUENCY (Hz)
1k
0
OUTPUT NOISE VOLTAGE DENSITY (nV/√Hz)
320
280
200
160
240
120
80
40
400
360
100k
2057 TA06b
10k
RBW = 1kHz
30V
–30V
–IN
+IN
30V
11.5k
11.5k
–30V
2057 TA01a
LTC2057HV
LTC2057HV
M9
M3
M1
INPUT CM RANGE = ±28V WITH 4V OF OUTPUT SWING
CMRR = 130dB (TYP), INPUT OFFSET VOLTAGE = 1µV (TYP)
+
–
–
+
8
9
10
P1
P3
P9
LT1991A
18V
–18V
REF
OUT
6
5
4
7
V
OUT
V
CC
V
EE
232Ω
1
2
3