7 Parameter Measurement Information

The various test setup configurations for the OPA859 are shown in the following figures. When configuring the

OPA859 as a noninverting amplifier in gains less than 3 V/V, set RF = 150 Ω. When configuring the OPA859 as a

noninverting amplifier in gains of 4 V/V and greater, set RF = 453 Ω.

+

±

2.5 V

í2.5 V

50-

Source

50

GND

50-

Measurement

System

50

50

GND

169

71.5

GND

Figure 7-1. Unity-Gain Buffer Configuration

+

±

2.5 V

í2.5 V

50-

Source

GND

50-

Measurement

System

50

50

GND

RF

RG

169

71.5

GND

RG values depend on gain configuration

Figure 7-2. Noninverting Configuration

+

±

2.5 V

í2.5 V

50-

Source

GND

GND

50-

Measurement

System

50

50

GND

150

150

75

169

71.5

GND

Figure 7-3. Inverting Configuration (Gain = –1 V/V)

+

±

2.5 V

í2.5 V

50-

Source

50

GND

RS

50-

Measurement

System

50

50

GND

CL

GND

169

75

GND

Figure 7-4. Capacitive Load Driver Configuration

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OPA859

SBOS852A – SEPTEMBER 2018 – REVISED MAY 2025

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