參數(shù)資料
型號： PGA2500IDBR
英文描述： Digitally Controlled Microphone Preamplifier
中文描述： 數(shù)控麥克風(fēng)前置放大器
文件頁數(shù)： 10/16頁
文件大?。?/td> 197K
代理商： PGA2500IDBR
"#$%%
SBOS289A NOVEMBER 2003 REVISED DECEMBER 2003
www.ti.com
10
DAISY-CHAINING MULTIPLE PGA2500
PREAMPLIFIERS
Since the serial port interface may be viewed as a serial in,
serial out shift register, multiple PGA2500 preamplifiers
may be connected in a cascaded or daisy-chained fashion,
as shown in Figure 4. The daisy-chained PGA2500
devices behave as a 16 x
N
-bit shift register, where
N
is the
number of cascaded PGA2500 devices. To program all of
the devices, simply force CS low for 16 x
N
serial clock
periods and clock in 16 x
N
bits of control data. The CS
input is then forced high to latch in the new settings.
A timing diagram for the daisy-chain application is shown
in Figure 5.
CS
SCLK
SDI
SDO
V
OUT
+
V
OUT
V
IN
+
V
IN
PGA2500
#1
CS
SCLK
SDI
SDO
V
OUT
+
V
OUT
V
IN
+
V
IN
PGA2500
#2
CS
SCLK
SDI
SDO
V
OUT
+
V
OUT
V
IN
+
V
IN
PGA2500
#
N
CS
DATACLK
DOUT
DIN
Micro
or DSP
Figure 4. Daisy-Chain Configuration for Multiple PGA2500 Preamplifiers
SCLK
CS
SDI
DC
G0
DC
G0
DC
Device #1
Device #2
Device #
N
G0
Figure 5. Serial Port Operation for Daisy-Chain Operation
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PGA2500IDBRG4 功能描述:傳聲器前置放大器 0dB & 10dB-65dB in 1dB steps RoHS:否 制造商:Texas Instruments 可用增益調(diào)整:Digital control, 65 dB to 0 dB 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 最大輸入電阻:9200 Ohms 最大工作溫度:+ 85 C 封裝 / 箱體:SSOP-28 封裝:Tube
PGA2505 制造商:TI 制造商全稱:Texas Instruments 功能描述:Digitally-Controlled MICROPHONE PREAMPLIFIER
PGA2505EVM 功能描述:音頻 IC 開發(fā)工具 PGA2505 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
PGA2505IDB 功能描述:傳聲器前置放大器 Dig-Controlled Micro phone Preamp RoHS:否 制造商:Texas Instruments 可用增益調(diào)整:Digital control, 65 dB to 0 dB 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 最大輸入電阻:9200 Ohms 最大工作溫度:+ 85 C 封裝 / 箱體:SSOP-28 封裝:Tube
PGA2505IDBR 功能描述:傳聲器前置放大器 Dig-Controlled Micro phone Preamp RoHS:否 制造商:Texas Instruments 可用增益調(diào)整:Digital control, 65 dB to 0 dB 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 最大輸入電阻:9200 Ohms 最大工作溫度:+ 85 C 封裝 / 箱體:SSOP-28 封裝:Tube
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