PGA2505

The PGA2505 is a digitally-controlled, analog microphone preamplifier designed for use as a front-end for high-performance audio analog-to-digita converters (ADCs). The PGA2505 features include low noise, wide dynamic range, and a differentia 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.

Features of the PGA2505 are:(1)FULLY DIFFERENTIAL lNPUT-TO-OUTPUT ARCHITECTURE; (2)DIGITALLY-CONTROLLED GAIN USING SP : Gain Range: 9dB through 60dB,3dB per Step Unity (0dB) Gain Setting via Serial Port; (3)DYNAMIC PERFORMANCE: Equivalent Input Noise with Z S = 150 and Gain = 30dB: 123dBu Total Harmonic Distortion plus Noise(THD+N) with Gain = 30dB: 0.0006%; (4)ZERO CROSSING DETECTION MINIMIZES AUDIBLE ARTIFACTS WHEN GAIN SWITCHING; (5)INTEGRATED DC SERVO MINIMIZES OUTPUT OFFSET VOLTAGE; (6)COMMON-MODE SERVO IMPROVES CMRR; (7)FOUR-WIRE SERIAL CONTROL PORT INTERFACE: Simple Interface to Microprocessor or DSP Serial Ports Supports Daisy-Chaining of Multiple PGA2505 Devices; (8)OVER-RANGE OUTPUT PIN PROVIDES CLIPPING INDICATION.

The absolute maximum ratings of the PGA2505 can be summarized as:(1)Supply Voltage, AGND or DGND to VA+ : 0.3 to +5.5 V; (2)Supply Voltage, AGND or DGND to VA : +0.3 to 5.5 V; (3)Supply Voltage, AGND or DGND to VD : +0.3 to 5.5 V; (4)Voltage Difference, VA to VD : ± 0.3 V; (5)Ground Difference, AGND to DGND :± 0.3 V.

If you want to know more information such as the electrical characteristics about PGA2505, please download the datasheet in www.seekdatasheet.com .