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參數資料
| 型號： | PGA2500IDBRG4 |
| 英文描述： | Digitally Controlled Microphone Preamplifier |
| 中文描述： | 數控麥克風前置放大器 |
| 文件頁數： | 1/17頁 |
| 文件大小： | 206K |
| 代理商： | PGA2500IDBRG4 |
SBOS289A NOVEMBER 2003 REVISED DECEMBER 2003
Digitally Controlled
Microphone Preamplifier
PGA2500
FEATURES
Fully Differential Input-to-Output Architecture
Digitally Controlled Gain Using Serial Port
Interface:
Gain Range: 10dB through 65dB, 1dB per
step
Unity (0dB) Gain Setting via Serial Port or
Dedicated Control Pin
Dynamic Performance:
Equivalent Input Noise with Z
S
= 150
and
Gain = 30dB: 128dBu
Total Harmonic Distortion plus Noise
(THD+N) with Gain = 30dB: 0.0004%
Zero Crossing Detection Minimizes Audible
Artifacts when Gain Switching
Integrated DC Servo Minimizes Output Offset
Voltage
Common-Mode Servo Improves CMRR
Four-Wire Serial Control Port Interface:
Simple Interface to Microprocessor or
DSP Serial Ports
Supports Daisy-Chaining of Multiple
PGA2500 Devices
Dedicated Input Pin for Selecting Unity Gain
Overload Output Pin Provides Clipping
Indication
Four General-Purpose Digital Output Pins
Requires
±
5V Power Supplies
Available in an SSOP-28 Package
APPLICATIONS
Microphone Preamplifiers and Mixers
Digital Mixers and Recorders
DESCRIPTION
The PGA2500 is a digitally controlled, analog microphone
preamplifier designed for use as a front end for high-
performance audio analog-to-digital converters (ADCs). The
PGA2500 features include low noise, wide dynamic range,
and a differential signal path. An on-chip DC servo loop is
employed to minimize DC offset, while a common-mode
servo function may be used to enhance common-mode
rejection.
The PGA2500 features a gain range of 10dB through 65dB
(1dB/step), along with a unity gain setting. The wide gain
range allows the PGA2500 to be used with a variety of
microphones. Gain settings and internal functions are
programmed using a 16-bit control word, which is loaded
using a simple serial port interface. A serial data output pin
provides support for daisy-chained connection of multiple
PGA2500 devices. Four programmable digital outputs are
provided for controlling the external switching of input pads,
phantom power, high pass filters, and polarity reversal
functions. The PGA2500 requires both +5V and 5V power
supplies and is available in a small SSOP-28 package.
All trademarks are the property of their respective owners.
!
!
www.ti.com
Copyright
2003, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 開發工具 PGA2505 Eval Mod RoHS:否 制造商:Texas Instruments 產品: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 可用增益調整:Digital control, 65 dB to 0 dB 共模抑制比（最小值）: 輸入補償電壓: 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 可用增益調整:Digital control, 65 dB to 0 dB 共模抑制比（最小值）: 輸入補償電壓: 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 |
| PGA256H009B5-2018R | 制造商:FCI 功能描述: |
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