OPA2836-Q1 Datasheet, PDF (24/44 Pages) Texas Instruments – Very-Low Power, Rail-to-Rail Out, Negative-Rail In, Voltage-Feedback Operational Amplifier

OPA2836-Q1
SBOS794 – DECEMBER 2016
www.ti.com
Feature Description (continued)
Figure 55 shows the test circuit and Figure 42 illustrates the recommended values of R_O versus capacitive loads,
C_L. See Figure 39 for frequency responses with various values.
V_IN
OPA2836-Q1
R_O
C_L
V_OUT
1 kW
Copyright © 2016, Texas Instruments Incorporated
Figure 55. R_O versus C_L Test Circuit
8.4 Device Functional Modes
8.4.1 Split-Supply Operation (±1.25 V to ±2.75 V)
To facilitate testing with common lab equipment, the OPA2836-Q1 EVM (see the OPA835DBV, OPA836DBV
EVM, SLOU314) is built 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 inputs and outputs to ground.
Figure 56 shows a simple noninverting configuration analogous to Figure 51 with a ±2.5-V supply and V_REF equal
to ground. The input and output swing symmetrically around ground. Split-supply operation is preferred because
of the ease of use in systems where signals swing around ground, but two supply rails still must be generated.
+2.5 V
V_SIG
R_G
OPA2836-Q1
V_OUT
Load
-2.5 V
R_F
Copyright © 2016, Texas Instruments Incorporated
Figure 56. Split-Supply Operation
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