Input Voltage (V)

0

0.5

1

1.5

0

0.025

0.05

0.1

Load

0.075

2

D001

18

OPA317-Q1, OPA2317-Q1, OPA4317-Q1

SLOS914 – JULY 2016

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Product Folder Links: OPA317-Q1 OPA2317-Q1 OPA4317-Q1

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Typical Applications (continued)

For a successful design, pay close attention to the DC characteristics of the operational amplifier chosen for the

application. To meet the performance goals, this application benefits from an operational amplifier with low offset

voltage, low temperature drift, and rail-to-rail output. The OPA2317 CMOS operational amplifier is a high-

precision, 5-µV offset, 0.05-μV/°C drift amplifier optimized for low-voltage, single-supply operation with an output

swing to within 50 mV of the positive rail. The OPA2317 family uses chopping techniques to provide low initial

offset voltage and near-zero drift over time and temperature. Low offset voltage and low drift reduce the offset

error in the system, making these devices appropriate for precise DC control. The rail-to-rail output stage of the

OPA2317 ensures that the output swing of the operational amplifier is able to fully control the gate of the

MOSFET devices within the supply rails.

9.2.3 Application Curve

Figure 23. Measured Transfer Function for High-Side V-I Converter