OPA2111 Datasheet, PDF (12/13 Pages) Burr-Brown (TI) – Dual Low Noise Precision Difet OPERATIONAL AMPLIFIER

Input
100Ω
100Ω
100Ω
100Ω
100Ω
10kΩ
2
1
1/2OPA2111
3
10kΩ
6
7
1/2OPA2111
5
10kΩ
2
1
1/2OPA2111
3
10kΩ
6
7
1/2OPA2111
5
10kΩ
2
1
1/2OPA2111
3
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
Since signal voltage sums directly with N
but amplifier noise voltage sums as N,
signal-to-noise ratio improves by N.
A_V = –1010
e_n = 1.9nV/ Hz typ⁽¹⁾ at 10kHz
BW = 30kHz typ
GBW = 30.3 MHz typ
V_OS = ±16µV typ⁽¹⁾
∆V_OS/∆T = ±0.16µV/°C typ⁽¹⁾
I_B = 40pA max
Z_IN = 10¹²â„¦ || 30pF
NOTE: (1) Theoretical performance
achievable from OPA2111BM
with uncorrelated random
distribution of parameters.
10kΩ
2
6
OPA37
3
Output
1/2OPA2111
N = 10
5 each OPA2111BM
FIGURE 12. ‘N’ Stage Parallel-Input Amplifier.
®
OPA2111
12