YD7738 Datasheet, PDF (3/4 Pages) Wuxi Youda electronics Co.,LTD – PREAMPLIFIER FOR PLAY OR RECORDER

YOUDA INTEGRATED CIRCUIT
YD7738
Pre Amplifier + Buffer Amplifier
Pre-Amp: Gv=40dB
Closed Loop Voltage Gain
Gv2
60
dB
Buff-Amp: Gv=20dB
Max. Output Voltage
Vo2
THD=3.0%
1.5 1.7
V
Equivalent Output Noise
Voltage
ALC Effect
ALC Range
VNO2
ALC1
ALC2
Rg=0, Gv2=60dB
VIN=
-60dBm～-20dBm
THD＜1.0%
1.2 2.5 mV
2
dB
60
dB
Power Amplifier
Open Loop Voltage Gain
Gvo3
60
70
dB
Closed Loop Voltage Gain
Gv3
40
dB
RL=4Ω,THD=10%
0.8
0.96
Maximum Out Power
POM
Vcc=9V,RL=4Ω,
THD=10%
W
2.0
Output Noise voltage
VNO3
Rg=0,Gv=40dB
0.3
mV
APPLICATION CIRCUIT
RADIO
ATT
+
22μ
MIC
TR
220Ω
S4
Vcc
12k _0.01μ
+
27k
0.01μ ^220μ
S6
330k
RT
+S
0.47μ
S
S1
S2
560p
330μ 100μ
+
++
3.3μ ^{16 15 14 13 12 11 10 9}
YD7738
10k
++
47μ 3.3μ
R/P
HEAD
S3
12345 67 8
390k
BIAS
REC
+
47μ
+
560p
1000p
1k 330Ω
51k
6.2k
Rf
680p _{+ 1000μSPEAKER}
RECORDING EQ
1μ 5.6k
S5
+
0.022μ ^10μ
+
47μ
4Ω
0.082μ
WuXi YouDa Electronics Co., Ltd
3 of 4
Website: www.e-youda.com