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
All trademarks are the property of their respective owners.
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
The PGA2500EVM provides a convenient platform for evaluating the performance and features of the PGA2500 product. Data output ports can be used to daisy-chain multiple PGA2500EVM circuit boards. The EVM requires the use of three power supplies, +/-5 analog supply and a +5 digital supply.
PGA2500EVMV2 — PGA2500 評估模組版本 2
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
| 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。