UPC1876 datasheet(33/42 Pages) RENESAS

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µPC1876

Data Sheet S11666EJ4V0DS00

(5/6)

Parameter

SAP single

distortion rate

Cross talk 1

SAP

→ stereo

Cross talk 2

stereo

→ SAP

Total muting level

LED driver

saturation voltage

dbx timing current

Inter-mode DC

offset 1

mute

→ monaural

Inter-mode DC

offset 2

mute

→ stereo

Inter-mode DC

offset 3

mute

→ SAP

Symbol

THDSAP2

CT1

CT2

Mute

VOSAT

VDOF1

VDOF2

VDOF3

Measurement

Set FMONO pin to “H” and SAP1/2, ST/SAP, MUTE pins to “L”.

Input SAP signal (100% modulation, f = 1 kHz) to COM pin. Measure output distortion

rate of SOT pin.

(nosie reduction OFF)

Set ST/SAP, FMONO pins to “H” and MUTE pin to “L”.

Input L-only signal (f = 800 Hz, 30% modulation) and SAP signal (f = 3 kHz, 30%

modulation) to COM pin. Assume output voltage of the LOT pin “VLOT”.

Connect LOT pin to 3 kHz BPF (gain = 0 dB at f = 3 kHz, –80 dB or more at f = 800 Hz)

to LOT pin. Assume output voltage of BPF “VLOTCT1”.

CT1 = 20 log

VLOTCT1

VLOT

Set SAP1/2, ST/SAP pins to “L” and FMONO pin to “H”.

Input L-only signal (f = 3 kHz, 30% modulation) and SAP signal (f = 800 Hz, 30%

modulation) to COM pin. Assume output voltage of the LOT pin “VLOT”.

Connect LOT pin to 3 kHz BPF (gain = 0 dB at f = 3 kHz, –80 dB or more at f = 800 Hz)

to LOT pin. Assume output voltage of BPF “VLOTCT2”.

CT2 = 20 log

VLOTCT2

VLOT

Set MUTE and FMONO pins to “L”.

Input monaural signal (100% modulation, f = 1 kHz) to COM pin. Assume output voltage

of ROT pin “VOMO”.

Set FMONO pin to “H”. Assume output voltage of ROT pin “VMUTE”.

Mute = 20 log

VOMO

VMUTE

Execute the same operation for LOT and NOT pins.

Apply current (10 mA) to SAPL, STL pins, and measure input voltage of the pin.

Input DC voltage (6 V) to STI and WTI pins, and measure current of the pin.

Set FMONO pin to “L”.

Apply DC 1 V to fHSW pin and DC 6 V to SDT pin.

Set MUTE pin to “H”. Assume output voltage of ROT pin “VMU”.

Next, input no signal to COM pin to change MUTE pin to “L”. Assume output voltage of

ROT pin “VMO”.

VDOF1 = VMO – VMU

Execute the same operation for LOT pin.

Set ST/SAP, FMONO pins to “H”.

Apply DC 1 V to fHSW pin and DC 6 V to SDT pin.

Set MUTE pin to “H”. Assume output voltage of ROT pin “VMU”.

Next, input pilot signal to COM pin to change MUTE pin to “L”. Assume output voltage of

ROT pin “VST”.

VDOF2 = VST – VMU

Execute the same operation for LOT pin.

Set FMONO pin to “H” and SAP1/2, ST/SAP pins “L”.

Apply DC 1 V to fHSW pin and DC 6 V to SDT pin.

Set MUTE pin to “H”. Assume output voltage of ROT pin “VMU”.

Next, input 5fH signal to COM pin to change MUTE pin to “L”. Assume output voltage of

ROT pin “VSAP”.

VDOF3 = VSAP – VMU

Execute the same operation for LOT pin.

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