THS4521 Datasheet, PDF (50/65 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT, RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521, THS4522, THS4524
SBOS458H – DECEMBER 2008 – REVISED JUNE 2015
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9.2.3 Differential Input to Differential Output Amplifier
The THS4521, THS4522, and THS4524 family are fully-differential operational amplifiers that can be used to
amplify differential input signals to differential output signals. Figure 91 shows a basic block diagram of the circuit
(V_OCM and PD inputs not shown). The gain of the circuit is set by R_F divided by R_G.
R_F
Differential
Input
R_G
V_IN+
V_IN-
R_G
V_S+
THS452x
Differential
Output
V_OUT-
V_OUT+
V_S-
R_F
Figure 91. Differential Input to Differential Output Amplifier
9.2.4 Single-Ended Input to Differential Output Amplifier
The THS4521, THS4522, and THS4524 family can also amplify and convert single-ended input signals to
differential output signals. Figure 92 illustrates a basic block diagram of the circuit (V_OCM and PD inputs not
shown). The gain of the circuit is again set by R_F divided by R_G.
Single-Ended
R_G
Input
R_F
V_S+
Differential
Output
R_G
THS452x
V_OUT-
V_OUT+
V_S-
R_F
Figure 92. Single-Ended Input to Differential Output Amplifier
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