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CT8022A11AQC 参数 Datasheet PDF下载

CT8022A11AQC图片预览
型号: CT8022A11AQC
PDF下载: 下载PDF文件 查看货源
内容描述: VOIP / VON G.723.1 , G279AB TRUESPEECH协处理器 [VOIP/VON G.723.1, G279AB TRUESPEECH CO-PROCESSOR]
分类和应用:
文件页数/大小: 194 页 / 1455 K
品牌: ETC [ ETC ]
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Version: 1.18  
PRELIMINARY/CONFIDENTIAL  
TrueSpeech® Co-Processor  
Table 12-3: Electrical Characteristics Over Recommended Operating Free-Air Temperature Range  
(Unless Otherwise Noted)  
PARAMETER  
TEST  
CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
VOH high level output voltage  
VOL low level output voltage  
IOZ off state output current  
VCC = 5V  
2.4  
V
V
0.6  
20  
VCC = Max  
µA  
µA  
II input current  
±20  
(pins without pull down resistors)  
II input current  
(pins with pull down resistors)  
+20  
-60  
µA  
ICC Supply Current  
Operating Mode  
Stop Device  
Mode  
f = 45.056 MIPS  
VCC = 5V  
mA  
mA  
0.5  
50  
2
No Clock  
VCC = 5V  
uA  
25 °C  
all inputs GND  
all outputs NC  
CI Input capacitance  
20  
pF  
Table 12-4: DTMF & Tone Generation Characteristics  
PARAMETER  
DTMF twist (high/low tone)  
MIN  
TYP  
MAX  
UNIT  
dB  
2
±8  
+0.1  
+6  
Tone generator frequency accuracy  
Tone generator level*  
Tone generator level accuracy  
-0.1  
-24  
-0.5  
%fc  
dB0  
dB  
+0.5  
* 0 dB0 is 0.707 VRMs programmable with 2 dB resolution. Assumes FSYNC = 8.000 KHz  
Table 12-5: Acoustic Echo Canceller Performance  
PARAMETER  
Acoustic Echo Cancellation  
Max echo delay  
NOTE  
30 dB  
10ms  
1
2, 3  
Notes:  
1. The acoustic echo canceller achieves 30 dB of cancellation for white noise in less than 1.0 seconds with the  
speaker CODEC output connected to the microphone CODEC input via a 2:1 attenuator and an output  
level equivalent to -10 dBm0.  
2. The acoustic echo canceller can cancell echos up to 10ms (approximately 3.4 meters or 11 feet in sound  
propagation.  
3. Assumes operation of CODEC at 8.0 KHz sample rate.  
CT8022A11AQC FW Revision 0118 DSP GROUP, INC., 3120 SCOTT BOULEVARD  
SANTA CLARA, CA 95054 PH: 408 986 – 4300 FAX: 408 986 – 4490  
173  
All specifications are subject to change without prior notice.  
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