7.2.2 DAC Output Gain and Buffer

+

–

DAC

249k

33.2k

VREF = 5V

42.5V

62pF

42.5V

29.3k

VOUT

OPA596

7.2.2.1 Design Requirements

The OPAx596 is designed for use as an output driver stage with gain and provides a wide, bipolar supply

voltage. Combined with the small size of the SOT23-5 package and the low power consumption, these

features make this device a great choice for high-channel density systems, such as semiconductor test and

manufacturing platforms where many channels are present. In this design example, the OPAx596 is configured

for a gain of approximately 17V/V.

Table 7-2. Design Parameters

PARAMETER

VALUE

Supply voltage

−42.5V to +42.5V

Input voltage

0V to 5V

Output voltage

−42.5V to +42.5V

Gain

17V/V

7.2.2.2 Detailed Design Procedure

In this design example, the OPAx596 is configured as both a gain stage and output driver. The input signal to the

amplifier is 0V to 5V, and the device is configured with a noninverting gain of 17V/V. The DAC reference voltage

of 5V is used as a reference to enable a bipolar output swing. This configuration results in an output voltage of

−42.5V to +42.5V. This design example is common in many systems that use a DAC to provide the input signal

and require a wide output signal with low output current requirements. The OPAx596 can swing to either rail

while remaining within the thermally specified limits. Such systems include test and measurement platforms and

power supplies.

OPA596

SBOSA42 – JUNE 2024

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