Datasheet

LTC6244
22
6244fb
Figure 11b. Input Referred Noise
Figure 11a. Low Noise AC Difference Amplifi er
(Bandwidth 800Hz to 160kHz, Gain = 10)
V
OUT
= GAIN • V2 – V1
()
+ V
REF
GAIN =
R2
R1
R3 = R1, R4 = R2, C1= C2
BANDWIDTH = f
HI
–f
LO
f
HI
=
1
2•π •R2•C1
, f
LO
=
1
2•π •R5•C3
APPLICATIONS INFORMATION
R5
200k
V
+
R2
20k
R4
20k
C2
47pF
R3
2k
V2
V1
V
OUT
V
REF
6244 F11a
R1
2k
C1
47pF
C3
1000pF
–
+
1/2 LTC6244
–
+
1/2 LTC6244
28
24
20
16
12
8
110
FREQUENCY (kHz)
6244 F11b
1000
4
0
INPUT REFERRED NOISE (nV/√Hz)
BW = 800Hz TO 160kHz
GAIN = 10