LMP7312_14 Datasheet, PDF (8/29 Pages) National Semiconductor (TI) – Precision SPI-Programmable AFE with Differential/Single-Ended Input/Output

LMP7312
SNOSB32B – MARCH 2010 – REVISED MARCH 2013
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Typical Performance Characteristics
Unless otherwise specified, T_A = 25°C, V⁺ = 5V, V_IO = 5V, V^− = 0V, V_{CM_ATT}=(+V_IN+(-V_IN))/2, V_{CM_AMP}=(+IN+(-IN))/2. R_L =
10kΩ, C_L =50pF, Differential output configuration.
Offset Voltage distribution (PMOS)
Offset Voltage distribution (NMOS)
Figure 2.
TCV_OS distribution (PMOS)
15
Nulling Switch Mode
V_OCM = 1V
12
9
6
3
0
-2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0
TCV_OS (éV/°C)
Figure 4.
Noise
vs.
Frequency (Core op-amp)
100
Figure 3.
TCV_OS distribution (NMOS)
Figure 5.
0.1Hz to 10Hz Noise (Core op-amp)
10
1
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
Figure 6.
1s/DIV
Figure 7.
8
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