L38812 Просмотр технического описания (PDF) - Unisonic Technologies
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L38812 Datasheet PDF : 8 Pages
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UTC L388 12
MAXIMUM RATINGS
PARAMETER
Speech switch supply current
Voltage Pin 1-14
Operating temperature
Storage temperature
LINEAR INTEGRATED CIRCUIT
SYMBOL
ID
Topr
Tstg
RATINGS
10
-0,5 ~ Vpin15+0.5
-20 ~ +70
-55 ~ +125
UNIT
mA
V
℃
℃
TEST CIRCUIT
ID
15 V+
V+
RxDetin 11
L388 12
GND RxDetout 10
16
V+
ID
+
VTxout
RTxout
10μF
100nF
CTx
F2out
10μF
+
+
100μF/16V
15 V+
5 Txout
6 TxDetin
4 F2out
L388 12
GND 16
Rxout 12
RxDetin 11
F5out 13
VRef
RF2out
ITxin +
4.7μF
+
3 +Txin
2 -Txin8NDet
TxDetout CMP
79
-Rx in
RxDetout CTR 14
10 1
VTxin
1μF
CTxDet 0.1μF CRxDet
+
+
RCTR
10μF
+
VRout
RRout
CRX 10μF
+
F5out
1μF
+
IRxin
RF5out
VRxin
ISOLATION AND MEASUREMENT OF VRef
INDet ITxDet
IRxDet ICTR
VNDet VTxDet VCMP VRxDet VCTR
ELECTRICAL CHARACTERISTICS
(Ta=25℃,f=1kHz, RCTR=0,CTxDet=0,RTxout= ∞,RRXout= ∞,RF2out= ∞, RF5out= ∞,RTX=0,RRX=0,CRxDet=0 and
ID=1.0mA unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Speech control section
Terminal voltage, V+
Internal reference voltage, VRef
ID=1.0mA
3.3
V
1.96
V
Frequency response for all amplifiers
Transmit gain, 20·Iog(VTxout/VTxin)
200-3400Hz,Relative 1 kHz
VCMP=VRef-0.1V
-1
1
dB
41.5 44
dB
VCMP=VRef+0.1V
-6 -3.5 dB
VCMP=VRef-0.1V RCTR=100k,VCTR=V+
41.5 44
dB
Receive gain, 20·Iog(VRxout/VRxin)
VCMP=VRef+0.1V RCTR=100k,VCTR=V+
VCMP=VRef+0.1V
26.5
19 21.5 dB
29
dB
VCMP=VRef-0.1V
-21 -18.5 dB
VCMP=VRef+0.1V RCTR=100k,VCTR=V+
26.5
29
dB
VCMP=VRef-0.1V RCTR=100k,VCTR=V+
4 6.5 dB
Max transmit detector gain,
20·Iog(VTxdet/VTxin)
VTxDet<200mVP ,CTX=100nF
VCMP=VRef+0.1V
VCMP=VRef-0.1V
67.5
dB
37 42.5
dB
Max transmit detector gain,
20·Iog(VRxdet/VRxin)
Background noise rectifier gain,(note 1)
VRxDet<200mVP ,CTX=100nF
VCMP=VRef+0.1V
VCMP=VRef-0.1V
VCMP=VRef-0.1V,Ctxdet=1μF
VCMP=VRef+0.1V,Ctxdet=1μF
53
dB
22.5 28
dB
6.0
dB
Hold
UTC UNISONIC TECHNOLOGIES CO. LTD 3
QW-R108-013,A
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