OPA1612-Q1_15 Datasheet, PDF (14/31 Pages) Texas Instruments – OPA1612-Q1 SoundPlus High-Performance, Bipolar-Input Audio Operational Amplifier

OPA1612-Q1
SLOS931A – NOVEMBER 2015 – REVISED NOVEMBER 2015
8 Detailed Description
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8.1 Overview
The OPA1612-Q1 bipolar-input operational amplifierachieves very low 1.1-nV/√Hz noise density with an ultralow
distortion of 0.000015% at 1 kHz. The rail-to-rail output swing, within 600 mV with a 2-kΩ load, increases
headroom and maximizes dynamic range. These devices also have a high output drive capability of ±40 mA. The
wide supply range of ±2.25 V to ±18 V, on only 3.6 mA of supply current per channel, makes them applicable to
both 5-V systems and 36-V audio applications. The OPA1612-Q1 op amp is unity-gain stable and provide
excellent dynamic behavior over a wide range of load conditions.
8.2 Functional Block Diagram
V+
Pre-Output Driver
IN–
IN+
OUT
V–
8.3 Feature Description
8.3.1 Power Dissipation
The OPA1612-Q1 op amp is capable of driving 2-kΩ loads with a power-supply voltage up to ±18 V. Internal
power dissipation increases when operating at high supply voltages. Copper leadframe construction used in the
OPA1612-Q1 op amp improves heat dissipation compared to conventional materials. Circuit board layout can
also help minimize junction temperature rise. Wide copper traces help dissipate the heat by acting as an
additional heat sink. Temperature rise can be further minimized by soldering the devices to the circuit board
rather than using a socket.
8.3.2 Electrical Overstress
Designers often ask questions about the capability of an operational amplifier to withstand electrical overstress.
These questions tend to focus on the device inputs, but may involve the supply voltage pins or even the output
pin. Each of these different pin functions have electrical stress limits determined by the voltage breakdown
characteristics of the particular semiconductor fabrication process and specific circuits connected to the pin.
Additionally, internal electrostatic discharge (ESD) protection is built into these circuits to protect them from
accidental ESD events both before and during product assembly.
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