OPA1655DBVT datasheet(20/42 Pages) TI

Part #	OPA1655DBVT

Description	OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational Amplifiers

PDF	42 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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20 / 42 page

8.2 Typical Applications

8.2.1 Preamplifier Circuit for Vinyl Record Playback With Moving-Magnet Phono Cartridges

The noise and distortion performance of the OPA165x is exceptional in applications with high source

impedances, which makes these devices an excellent choice in preamplifier circuits for moving magnet phono

cartridges. The high source impedance of the cartridge, and high gain required by the RIAA playback curve at

low frequency, requires an amplifier with both low input current noise and low input voltage noise.

VOUT

+IN

–

15 V

OPA165x

118 k

10 k

27 nF

7.5 nF

127

47 k

150 pF

100 F

100

100 F

100 k

MM Phono Input

Output

Figure 8-2. Preamplifier Circuit for Vinyl Record Playback With Moving-Magnet Phono Cartridges

(Single Channel Shown)

8.2.1.1 Design Requirements

• Gain: 40 dB (1 kHz)

• RIAA accuracy: ±0.5 dB (100 Hz to 20 kHz)

• Power supplies: ±15 V

OPA1655, OPA1656

SBOS901C – MARCH 2019 – REVISED SEPTEMBER 2022

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OPA1655DBVT Datasheet(PDF) 20 Page - Texas Instruments