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參數(shù)資料
| 型號(hào)： | W681360SG |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 編解碼器 |
| 英文描述： | 3V SINGLE-CHANNEL 13-BIT LINEAR VOICE-BAND CODEC |
| 中文描述： | MU-LAW, LINEAR CODEC, PDSO20 |
| 封裝： | 0.300 INCH, ROHS COMPLIANT, PLASTIC, SOP-20 |
| 文件頁數(shù)： | 9/34頁 |
| 文件大小： | 348K |
| 代理商： | W681360SG |
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W681360
Publication Release Date: September 2005
- 9 -
Revision A.2
Table 7.1. When the input operational amplifier is powered down the AO pin becomes high input
impedance.
TABLE 7.1: INPUT AMPLIFIER MODES OF OPERATION
AI+
(Pin 19)
V
DD
1.2 to V
DD
-1.2
V
SS
Input Amplifier
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Powered Down
Input
AO (Pin 17)
AI+, AI- (Pins 19, 18)
AI- (Pin 18)
When the input amplifier is powered down, the input signal at AO or AI- should be referenced to the
analog ground voltage V
AG
.
The output of the input operational amplifier is first fed through a low-pass filter to prevent aliasing at
the switched capacitor 3.4kHz low pass filter. Subsequently the 3.4kHz switched capacitor low pass
filter bandlimits the input signals well below 4kHz. Signals above 4kHz would be aliased at the
sampling rate of 8kHz. A high pass filter with a 200Hz cut-off frequency prevents DC coupling. All
filters are designed according to the G.712 ITU-T specification. The high-pass filter may be bypassed
depending on the logic level on the HB pin. If the high pass is removed the frequency response of the
device extends down to DC.
After filtering the signal is digitized as a 13-bit linear PCM code and fed to the PCM interface for serial
transmission at the sample rate supplied by the external frame sync FST.
7.1.1 Input Operational Amplifier Gain
The gain of the input operational amplifier can be adjusted using external resistors. For single-ended
input operation the gain is given by a simple resistive ratio.
FIGURE 7.2: INPUT OPERATIONAL AMPLIFIER GAIN – SINGLE-ENDED INPUT
Gin = Ro/Ri
Vin
VAG
-
+
AI+
AI-
AO
Ri
Ro
For differential input operation the external resistor network is more complex but the gain is expressed
in the same way. Of course, a differential input also has an inherent 6dB advantage over a
corresponding single-ended input.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W681360SG TR | 功能描述:IC VOICEBAND CODEC 3V 1CH 20SOP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| W681360W | 制造商:WINBOND 制造商全稱:Winbond 功能描述:3V SINGLE-CHANNEL 13-BIT LINEAR VOICE-BAND CODEC |
| W681360WG | 功能描述:IC VOICEBND CODEC 3V 1CH 20TSSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| W681360WG TR | 功能描述:IC VOICEBND CODEC 3V 1CH 20TSSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| W681360WG(TR) | 制造商:Winbond Electronics 功能描述:CODEC |
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