NJU3555NJU8753
-7-
Ver.2009-03-10
ELECTRICAL CHARACTERISTIC
(Ta=25°C, VDD=VREG=2.85V, VBAT=3.7V, VDDO=10V, VSS=VSS1=0V,
TEST1=TEST2=TEST3=0V, EN1=EN2=2.85V,
Input Signal=1kHz, Input Signal Level=150mVrms,Frequency Band=20Hz to 20kHz,
Load Impedance=2.0µF, 2nd-order 11kHz LC Filter(Q=0.7),
When the SBDs are connected between OUTP and VSS, OUTN and VSS.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Note
VDD Supply Voltage VDD 2.6 2.85 3.6 V
VREG Supply Voltage VREG 2.6 2.85 3.6 V
VBAT Input Voltage VBAT 2.6 3.7 4.2 V
With SBDs 6.5 10.0 12.0
VDDO Supply Voltage VDDO Without SBDs. 6.5 7.5 8.5 V 6
Input Impedance ZIN IN terminal - 20 - K
Voltage Gain AV - 31 - dB
THD+N THD Input Signal Level =200mVrms - 0.05 0.08 % 4
Maximum Output Vo Output THD+N=10% - 8.0 - Vrms
S/N SN A weight - 80 - dB 4
Operating Current(Standby) IST EN1=EN2=0V - - 1 µA
Operating Current
(No signal input) ISS No-load operating
No Signal Input - 10 15 mA
VIH EN1, EN2 terminals 0.7VDD - VDD V
Input Voltage VIL EN1, EN2 terminals 0 - 0.3VDD V
Input Leakage Current ILK EN1, EN2 terminals - - ±1.0 µA
Switching regulator
Oscillating Frequency fOSC 220 300 380 kHz
Switching regulator
Maximum Load Current IOUT Step-up Voltage =10.0V
VOUT= 10.0V X 95% 50 - - mA
Switching regulator
Load Stability VOUT Step-up Voltage =10.0V
IOUT =10mA to 50mA - 100 - mV
*The LSI must be used within the “Absolute maximum ratings”. Otherwise, a stress may cause permanent
damage to the LSI.
Note 3) Test system of the THD+N and S/N
The THD+N and S/N are tested in the system shown in Figure 1, where a 2nd-order LC LPF and
another filter incorporated in an audio analyzer are used.
2nd-order LC LPF : Refer to “Typical Application Circuit”
Filters : 22Hz HPF + 20kHz LPF(AES17)
(with the A-Weight filter for S/N test)
Input Signal
THD
Measuring
Apparatus
Filter
20kHz
(AES17)
2nd-order
LC LPF
NJU8753 Test Board Audio Analyzer
Figure 1. Output THD+N and S/N Test System
NJU8753