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CXA2078Q

I²C Bus-Compatible Audio/Video Switch with Electronic Volume

Sony Semiconductor 

CXA2078Q

Electrical Characteristics

Audio system

Unless otherwise stated: input coupling capacitor 1µF in series with 6kΩ resistor; output coupling capacitor of

10µF; load of 10kΩ.

Nominal conditions (Ta = 25°C, Vcc_12V = 12V)

Item

Symbol

Input pin voltage

VAPIN

R/LOUT1, 2 GVA

Gain

RTV, LTV GVATV

MONO

GVAM

Audio frequency

response

FAF

Frequency B/W

FBWA1

Distortion

THD

Input Dynamic Range

VdA

Cross talk

(Channel separation)

VctA

Ripple

rejection

R/LOUT1, 2 RRA

RTV, LTV RRATV

MONO

RRAM

DC Offset -R/Lout1, 2

Input impedance

Output Impedance

Voff

Zin

Zout

Phase Difference

Vpda

S/N ratio

S/NA

Electronic Volume Control

Fine volume attenuation

step

AEVC

Coarse volume

attenuation step

AEVF

Mute

Amute

DC Offset -RTV, LTV

VoffTV

Conditions

No signal, no load (Fig. 5)

f = 1kHz, 1Vrms input. (Fig. 6)

f = 1kHz, 1Vrms input. (Fig. 6)

f = 1kHz, 1Vrms "stereo" input. (Fig. 6)

0.3Vp-p input. Output level at 30kHz

with 1kHz serving as 0dB. 6kΩ

removed. (Fig. 7)

0.3Vp-p input; frequency where output

level is –3dB with 1kHz serving as

0dB. 6kΩ removed. No load (Fig. 7)

f = 1kHz, 0.5Vrms, unweighted

response; LPF @400Hz,

HPF @ 80KHz. (Fig. 6)

f = 1kHz (Fig. 6)

f = 1kHz, 1Vrms input on one input,

measure on any other audio output.

(Fig.6)

f = 100Hz, 0.3Vp-p applied to Vcc_aud

(Fig. 8)

f = 100Hz, 0.3Vp-p applied to Vcc_aud

(Fig. 8)

f = 100Hz, 0.3Vp-p applied to Vcc_aud

(Fig. 8)

Offset voltage between any audio input

and R/Lout1, 2 (Fig. 5)

(excluding series external 6kΩ)

(excluding any external series resistor)

f = 1kHz, 1Vrms input to two channels.

Phase difference of stereo output

measured

f = 1kHz, 1Vrms input (at maximum

volume).

HPF @ 20Hz, LPF @ 20kHz. (Fig. 6)

f = 1kHz, 0.5Vrms input. Set by I2C

(Fig.6)

f = 1kHz, 0.5Vrms input. Set by I2C

(Fig.6)

f = 1kHz, 1Vrms input. (Fig.6)

Offset voltage between any audio input

and RTV, LTV outputs (Fig.5)

Min. Typ. Max. Unit

4.2 4.5 4.8 V

–0.5 0 +0.5 dB

–0.65 0 +0.35 dB

–0.65 0 +0.45 dB

–0.3 0 +0.3 dB

—

1

— MHz

— 0.004 0.2 %

2 — — Vrms

— –88 –76 dB

— –62 — dB

— –75 — dB

— –44 — dB

–30 +2 +30 mV

48 60 72 kΩ

— 10 — Ω

— 0.05 — Deg

72 95 — dB

0.6 1 1.4 dB

7.5 8 8.5 dB

>80

dB

–30 +2 +30 mV

– 11 –

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