9 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification, and

TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining

suitability of components for their purposes. Customers should validate and test their design

implementation to confirm system functionality.

9.1 Application Information

The OPAx607-Q1 devices feature a 50-MHz GBW with 900 µA of supply current, providing good AC

performance at low-power consumption. The low input noise voltage of 3.8 nV/√ Hz, the approximate pA of

bias current, and a typical input offset voltage of 0.1 mV make the device very suitable for both AC and DC

applications.

9.2 Typical Applications

9.2.1 100-kΩ Gain Transimpedance Design

The high GBW and low input voltage and current noise for the OPAx607-Q1 devices make it an excellent

wideband transimpedance amplifier for moderate to high transimpedance gains.

+5 V

GND

+

±

100 k

OPAx607-Q1

Supply decoupling

not shown

3 pF

11.5 pF

5.5 pF

OPA607's input differential and

common-mode capacitance

+0.5 V

1.1 pF

Figure 9-1. Wideband, High-Sensitivity, Transimpedance Amplifier

9.2.1.1 Design Requirements

Design a high-bandwidth, high-transimpedance-gain amplifier with the design requirements shown in Table 9-1.

Table 9-1. Design Requirements

TARGET BANDWIDTH (MHz) TRANSIMPEDANCE-GAIN (kΩ)

PHOTODIODE CAPACITANCE

(pF)

2

100

3

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OPA607-Q1, OPA2607-Q1

SBOSA38A – FEBRUARY 2021 – REVISED APRIL 2021

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