NCS2632: NOCAP™, Pop-Free, 3 Vrms Audio Line Driver with Adjustable Gain

The NCS2632 is a pop-free stereo line driver. It uses ON Semiconductor's patented NOCAP technology which allows the elimination of the external DC-blocking capacitors by providing ground-referenced outputs through the generation of an internal negative supply rail. The device can drive 3 VRMS into a 600 Ω load at 5 V power supply. By eliminating the two external heavy coupling capacitors, the NOCAP approach offers significant space and cost savings compared to similar audio solutions. The NCS2632 has differential inputs and is available with an external adjustable gain ranging from ±1 V/V to ±10 V/V. The gain is adjusted with external resistors. The device can also be configured as a 2nd order low pass filter to complement DACs and SOC converters. In addition to the NOCAP architecture, it contains specific circuitry to prevent Pop and Click noise from occurring during Enable / Shutdown transitions. The Signal-to-Noise Ratio reaches 105 dB, offering high fidelity audio sound. The NCS2632 exhibits a high power supply rejection with a typical value of 90 dB. This device also features an Under-Voltage Protection (UVP) function which can be adjusted using an external resistor bridge. The device is available in a TSSOP-14 package.

Features

NOCAPTM
Supply voltage from 2.2V to 5.5V
SNR = 105dB Typical Vn of 8 µVrms, A-Weighted THD+N < 0.001% at 1 kHz
Adjustable gain from ±1V/V to ±10V/V
Differential Input
High PSRR: 90 dB
External Under-Voltage Detection function (UVP)
Enhanced Pop and Click Suppression Function
Offset Voltage: 400 µV
Outputs pass 8 kV contact discharge according to IEC61000-4-2 under application conditions
Available in a TSSOP-14 package
Output Voltage into 600 Ω Load: 2 VRMS with 3.3V Supply Voltage 3 VRMS with 5V Supply Voltage

Benefits

Eliminates Pop/Click and Output DC-Coupling Capacitors, Provides Flat Frequency Response from 20 Hz to 20 kHz
Compatible with a wide supply voltage range
Low Noise and Low THD+N
Customizable to application or product
Reduces noise
Reduces noise
Allows device to shot down before upstream devices, thereby preventing pop and click noise
Improves auditory experience
Low offset voltage translates to low DC error
Resistant to ESD events
Saves space and cost

Applications

Audio line driver

End Products

Set-Top Boxes
PDP / LCD TV
Bluray Players, DVD Players
Home Theater in a Box
Laptops, Notebook PCs

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
NOCAP, Pop-Free, 3 Vrms Audio Line Driver with Adjustable Gain	NCS2632/D (208588kB)	4

Evaluation Board Documents (5)

Document Title	Document ID/Size	Revision	Revision Date
NCS2632 Evaluation Board User's Manual	EVBUM2203/D (1505.0kB)	0
NCS2632DTBGEVB Bill of Materials ROHS Compliant	NCS2632DTBGEVB_BOM_ROHS.PDF (88.0kB)	0
NCS2632DTBGEVB Gerber Layout Files (Zip Format)	NCS2632DTBGEVB_GERBER.ZIP (177.0kB)	0
NCS2632DTBGEVB Schematic	NCS2632DTBGEVB_SCHEMATIC.PDF (194.0kB)	0
NCS2632DTBGEVB Test Procedure	NCS2632DTBGEVB_TEST_PROCEDURE.PDF (198.0kB)	0