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| THS4531A_15 Datasheet, PDF (29/59 Pages) Texas Instruments – THS4531A Ultra Low-Power, Rail-to-Rail Output, Fully Differential Amplifier | |||
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VIN+
Input From 50-Ω
Test Equipment
RG
PD
RIT
0.22 µF
VIN±
No Connection
Installed to Balance
Amplifier's Feedback Networks
49.9 Ω
0.22 µF
RG
RIT
THS4531A
SLOS823B â DECEMBER 2012 â REVISED JUNE 2015
RF
RO
VS+
+
VOCM
±
THS4531A
VS-
RO
RF
VOUT±
Output to
Test Equipment
VOUT+
Output to
Test Equipment
Figure 71. Slew Rate, Transient Response, Settling Time, ZO, Overdrive Recovery, VOUT Swing, and Turn-
On and Turn-Off Test Circuit
9.1.4 Common-Mode and Power Supply Rejection
The circuit shown in Figure 72 is used to measure the CMRR. The signal from the network analyzer is applied
common-mode to the input.
VIN+
Input From 50-
Test Equipment
RG
RF
RO
VIN±
No Connection
0.22 F
RG
VS+
VOUT±
+
VOCM
±
THS4531A
VS±
VOUT+
RO
ROT
RF
RIT
Cal Diff Probe
Measure With
Diff Probe
Figure 72. CMRR Test Circuit
Figure 73 is used to measure the PSRR of VS+ and VS-. The power supply is applied to the network DC offset
input of the analyzer. For both CMRR and PSRR, the output is probed using a high impedance differential probe
across ROT. The calculated CMRR and PSRR are referred to the input of the device.
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