PGA2500IDBR ,Digitally Controlled Microphone Preamplifierfeatures a gain range of 10dB through 65dBArtifacts when Gain Switching(1dB/step), along with a uni ..
PGA2500IDBRG4 ,Gain Range: 0dB, and 10dB to 65dB in 1dB steps 28-SSOP -40 to 85 PGA2500SBOS289A − NOVEMBER 2003 − REVISED DECEMBER 2003Digitally Controlled Microphone Preamplifier
PGA2505IDB ,Gain Range: 0dB, and 9dB to 60dB, in 3dB steps 24-SSOP -40 to 85features a gain range of 9dB through60dB (3dB/step), along with a unity gain setting. The• COMMON-M ..
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PGA308AIDGSR ,Single Supply, Auto-Zero Sensor Amplifier w/Programmable Gain & Offset 10-VSSOP -40 to 125FEATURES DESCRIPTION2• Digital Calibration for Bridge SensorsThe PGA308 is a programmable analog se ..
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PL-2301 , USB TO USB BRIDGE CONTROLLER
PL2303 , PL-2303 USB to RS-232 Bridge Controller Product Datasheet
PL-2303 , PL-2303 USB to RS-232 Bridge Controller Product Datasheet
PL-2303 , PL-2303 USB to RS-232 Bridge Controller Product Datasheet
PL-2303 , PL-2303 USB to RS-232 Bridge Controller Product Datasheet
PL-2305 , USB TO IEEE1284 BRIDGE CONTROLLER Bi-Direction Parallel Interface
PGA2500-PGA2500IDB-PGA2500IDBG4-PGA2500IDBR-PGA2500IDBRG4
Gain Range: 0dB, and 10dB to 65dB in 1dB steps 28-SSOP -40 to 85
SBOS289A − NOVEMBER 2003 − REVISED DECEMBER 2003
Digitally Controlled
Microphone Preamplifier
PGA2500
FEATURES 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 Input Noise with ZS = 150Ω and
Gain = 30dB: −128dBu
− Total Harmonic Distortion plus Noise
(THD+N) with Gain = 30dB: 0.0004% 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
DESCRIPTIONThe PGA2500 is a digitally controlled, analog microphone
preamplifier designed for use as a front end for high-
performance audio analog-to-digital converters (ADCs). 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.
