PGA2505
PGA2505
Burr-Brown Audio
www. ti. com . . . SBOS396B – MARCH 2009 – REVISED JUNE 2009
™ Digitally-Controlled MICROPHONE PREAMPLIFIER
FEATURES
1
•234 FULLY DIFFERENTIAL lNPUT-TO-OUTPUT ARCHITECTURE
• DIGITALLY-CONTROLLED GAIN USING SPI™: – Gain Range: 9dB through 60dB, 3dB per Step
– Unity (0dB) Gain Setting via Serial Port
• DYNAMIC PERFORMANCE: – Equivalent Input Noise with ZS = 150Ω and Gain = 30dB: –123dBu
– Total Harmonic Distortion plus Noise (THD+N) with Gain = 30dB: 0. 0006%
• 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 PGA2505 Devices
• OVER-RANGE OUTPUT PIN PROVIDES CLIPPI...
PGA2505 PDF File
