Key facts
- Brand
- Texas Instruments
- Model
- PGA2500
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-01
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Texas Instruments PGA2500 Digitally Controlled Microphone Preamplifier Datasheet
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). It features a fully differential input-to-output architecture and a gain range of 10dB through 65dB in 1dB steps, with a unity gain setting available via a serial port or dedicated control pin.
The device includes a four-wire serial control port interface that supports daisy-chaining of multiple PGA2500 devices. Key features include zero crossing detection to minimize audible artifacts during gain switching, an integrated DC servo to minimize output offset voltage, and a common-mode servo to improve CMRR. The PGA2500 requires +5V and -5V power supplies and is available in an SSOP-28 package.
Texas Instruments PGA2500 specifications
| Gain Range | 10dB through 65dB |
|---|---|
| Gain Step Size | 1dB per step |
| Equivalent Input Noise | -128dBu |
| Total Harmonic Distortion plus Noise | 0.0004% |
| Operating Temperature Range | -40 to +85 °C |
| Supply Voltage | +5V and -5V |
| Package Type | SSOP-28 |
| Serial Clock Frequency | 0 to 6.25 MHz |
Source: Texas Instruments PGA2500 Digitally Controlled Microphone Preamplifier Datasheet
All Texas Instruments PGA2500 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the gain range of the PGA2500?
The gain range is 10dB through 65dB with 1dB per step.
From: Texas Instruments PGA2500 Digitally Controlled Microphone Preamplifier Datasheet
How is the gain controlled?
Gain settings and internal functions are programmed using a 16-bit control word loaded via a simple serial port interface.
From: Texas Instruments PGA2500 Digitally Controlled Microphone Preamplifier Datasheet
What is the gain range of the PGA2500?
The gain ranges from 10dB through 65dB with steps of 1dB.
From: Texas Instruments PGA2500 Digitally Controlled Microphone Preamplifier Datasheet
How is the gain controlled?
Gain settings are programmed using a 16-bit control word loaded via a simple serial port interface.
From: Texas Instruments PGA2500 Digitally Controlled Microphone Preamplifier Datasheet
What is the gain range and step size of the PGA2500?
The PGA2500 provides a gain range of 10 dB to 65 dB with 1 dB steps.
From: Texas Instruments PGA2500 Digitally Controlled Microphone Preamplifier Datasheet
How is gain programmed on the PGA2500?
Gain is programmed with a 16‑bit control word sent over a four‑wire serial port interface.
From: Texas Instruments PGA2500 Digitally Controlled Microphone Preamplifier Datasheet