OPA2810 Datasheet, PDF (16/26 Pages) Texas Instruments – OPA2810 Dual High-Performance, Low-Power, Wide Supply Range, Rail-to-Rail Input/Output FET-Input Operational Amplifier

OPA2810
SBOS789 – AUGUST 2017
www.ti.com
7.4 Device Functional Modes
7.4.1 Split-Supply Operation (±2.375 V to ±13.5 V)
To facilitate testing with common lab equipment, the OPA2810 may be configured to allow for split-supply
operation. This configuration eases lab testing because the mid-point between the power rails is ground, and
most signal generators, network analyzers, oscilloscopes, spectrum analyzers and other lab equipment reference
their inputs and outputs to ground. Figure 1 shows the OPA2810 configured as a noninverting amplifier while
Figure 1 shows the OPA2810 configured as an inverting amplifier. For split-supply operation referenced to
ground, the power supplies V_S+ and V_S- are symmetrical around ground and V_REF = GND. Split-supply operation
is preferred in systems where the signals swing around ground because of its ease-of-use; however, it requires
the use of two supply rails.
7.4.2 Single-Supply Operation (4.75 V to 27 V)
Many newer systems use a single power supply to improve efficiency and reduce the cost of the extra power
supply. The OPA2810 can be used with a single supply (negative supply set to ground) with no change in
performance, as long as the input and output are biased within the linear operation of the device. To change the
circuit from split supply to a balanced, single-supply configuration, level shift all the voltages by half the difference
between the power-supply rails. An additional advantage of configuring an amplifier for single-supply operation is
that the effects of PSRR are minimized because the low-supply rail has been grounded.
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