UPC1876 datasheet(27/40 Pages) NEC

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µPC1876

Data Sheet S11666EJ4V0DS00

Electrical Characteristics Measurement List (TA = +25˚C, RH

≤ 70%, VCC = 9.0 V)

(1/6)

Measurement

Current flowing to VCC pin (no signal).

Input signal (f = 15.734 kHz) to COM pin. Raise input voltage gradually until stereo LED

turns ON. Then measure input voltage of COM pin.

Input signal (f = 15.734 kHz) to COM pin for stereo LED to be ON. Lower input voltage

gradually until stereo LED turns OFF. Then assume input voltage “V”.

STHY = 20 log

STSENSE

Input signal (f = 14.5 kHz, Vin = 0.0848 Vp-p [30 mVr.m.s.]) to COM pin. Raise input

frequency gradually until stereo LED turns ON. Then assume input frequency “fin1”.

CC =

15.734 [kHz] – fin1

15.734 [kHz]

Next, input signal (f = 17.0 kHz, Vin = 0.0848 Vp-p [30 mVr.m.s.]) to COM pin. Lower input

frequency gradually until stereo LED turns ON. Then assume input frequency “fin2”.

CC =

fin2 – 15.734 [kHz]

15.734 [kHz]

Input signal (f = 78.67 kHz, no modulation) to COM pin. Raise input voltage gradually

until SAP LED turns ON. Then measure input volage of COM pin.

Input signal (f = 78.67 kHz, no modulation) to COM pin for SAP LED to be ON.

Lower input voltage gradually until SAP LED turns OFF. Then assume input voltage “V”.

SAPHY = 20 log

SAPSENSE

Apply 6.0 V to SDT pin. Input signal (f = 160 kHz, Vin = 10 mVr.m.s.) to COM pin. Raise

frequency and measure the DC voltage of NDT pin. At maximum voltage, raise input

voltage gradually until SAP LED turns OFF. Then measure input voltage of COM pin.

Apply 6.0 V to SDT pin. Input signal (f = 160 kHz, Vin = 90 mVr.m.s.) to COM pin. Raise

frequency and measure the DC voltage of NDT pin. At maximum voltage, lower input

voltage gradually until SAP LED turns ON. Then assume input voltage of COM pin “V”.

NOHY = 20 log

NOSENSE

Set MUTE and FMONO pins to “L”.

Input monaural signal (100% modulation, f = 300 Hz) to COM pin. Measure output

voltage of ROT pin.

Execute the same operation for LOT pin.

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

Input L-only signal (100% modulation, f = 300 Hz) to COM pin. Measure output voltage

of LOT pin.

Execute the same operation for ROT pin (R-only signal).

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

Input SAP signal (100% modulation, f = 300 Hz) to COM pin. Measure output voltage of

ROT pin.

Execute the same operation for LOT pin.

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

Input SAP signal (100% modulation, f = 300 Hz) to COM pin. Measure output voltage of

SOT pin.

(Noise reduction : OFF)

Parameter

Supply current

Stereo detection

input sensitivity

Stereo detection

hysteresis

Stereo detection

capture range

SAP detection

input sensitivity

SAP detection

hysteresis

Noise detection

input sesitivity

Noise detection

hysteresis

Monaural total

output voltage

Stereo total output

voltage

SAP total output

voltage

SAP single output

voltage

Symbol

ICC

STSENSE

STHY

SAPSENSE

SAPHY

NOSENSE

NOHY

VOMO

VOST

VOSAP1

VOSAP2

UPC1876 Datasheet(PDF) 27 Page - NEC

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