TS472 Datasheet, PDF (1/20 Pages) STMicroelectronics – Very Low Noise Microphone Preamplifier with 2V Biased Output and Active Low Standby Mode

TS472
Very Low Noise Microphone Preamplifier
with 2V Biased Output and Active Low Standby Mode
■ Low noise: 10nV/√Hz typ. equivalent input
noise @ F = 1kHz
■ Fully differential input/output
■ 2.2V to 5.5V single supply operation
■ Low power consumption @20dB: 1.8mA
■ Fast start up time @ 0dB: 5ms typ.
■ Low distortion: 0.1% typ.
■ 40kHz bandwidth @ -3dB and adjustable
■ Active low standby mode function (1µA max)
■ Low noise 2.0V microphone bias output
■ Available in flip-chip lead-free package
■ ESD protection (2kV)
Description
The TS472 is a differential-input microphone
preamplifier optimized for high-performance, PDA
and notebook audio systems.
This device features an adjustable gain from 0dB
to 40dB with excellent power-supply and
common-mode rejection ratios. In addition, the
TS472 has a very low-noise microphone bias
generator of 2V.
It also includes a complete shutdown function,
with active low standby mode.
Order Codes
Part Number
TS472EIJT
Temperature Range
-40, +85°C
Flip-chip - 12 bumps
Pin Connections (top view)
C1
C2
OUTPUT
GS
BIAS
IN+
IN-
STDBY VCC
OUT+
OUT-
GND BYPASS
Applications
■ Video and photo cameras with sound input
■ Sound acquisition & voice recognition
■ Video conference systems
■ Notebook computers and PDAs
Package
Flip-Chip
Packing
Tape & Reel
Marking
472
October 2005
Rev 2
1/20
www.st.com
20