PGA2500
- 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 Noise with ZS = 150
and Gain = 30dB: –128dBu - Total Harmonic Distortion plus Noise (THD+N) with Gain = 30dB: 0.0004%
- Equivalent Noise with ZS = 150
- 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
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The PGA2500 is a digitally controlled, analog microphone preamplifier designed for use as a front end for highperformance audio analog-to-digital (A/D) converters. 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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | PGA2500: Digitally Controlled Microphone Preamplifier datasheet (Rev. A) | 2003年 12月 4日 | |
| EVM User's guide | PGA2500EVMV2 Evaluation Module | PDF | HTML | 2021年 6月 3日 | |
| EVM User's guide | PGA2500EVM Evaluation Module User's Guide | 2003年 12月 5日 |
設計與開發
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PGA2500EVM — PGA2500 評估模組
PGA2500EVM 是一個方便好用的平台，適用於評估 PGA2500 產品的性能和功能。資料輸出連接埠可透過菊鏈方式連接多個 PGA2500EVM 電路板。EVM 需要使用三種電源供應：+/-5 類比電源和 +5 數位電源。
PGA2500EVMV2 — PGA2500 評估模組版本 2
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SSOP (DB) | 28 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。