100Hz 100MHz Variable Gain Amplifier Fully differential input output u

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100Hz 100MHz Variable Gain Amplifier Fully differential input output u

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VGA001 Variable Gain Amplifier
100Hz 100MHz Variable Gain Amplifier Fully differential input output used single-ended input differential output 3.3V Supply Designed (0.35µ) process (See General Notes Description
VGA001 voltage controlled Variable Gain Amplifier. designed maximum input signal 600uV over bandwidth 100Hz 100MHz. control voltage must provided gain, typical range -3dB 17dB. Additional circuitry used control common mode voltage differential output. current required common mode adjustment circuitry varies depending desired voltage level.
Performance Features
Performance Features
Nominal bandwidth Nominal gain range Nominal reference current Temperature range Nominal supply voltage, Nominal supply current, Maximum supply current (simulated) Status
Value
100Hz 100MHz -3dB 17dB 25uA 3.3V 1.2mA 2.2mA Functional Silicon
Cell Definition
IREF25u LVDD
Name
LVDD LVSS
Description
Positive voltage supply Ground Reference current Gain control voltage Positive input Negative input Positive output Negative output
OUTP
IREF25u CNTRL OUTP OUTN
OUTN
CNTRL LVSS
Semiconductor www.amis.com
VGA001 Variable Gain Amplifier
General Notes
double-poly process. could used single-poly process, some adjustment would required because resistivity poly would slightly different. Parts have only been evaluated ceramic packages. common mode adjust circuit require significant current move common mode voltage close either supply rail.
Application Notes
uses transistors change resistance seen amplifiers changes effective gain. However, change resistance also changes common mode voltage output, thus common mode adjust circuit required. gain range sensitive reference current also external load; differential buffer should used when driving large loads. gain control voltage function linear, monotonic, centered approximately about Vdd/2.
Semiconductor www.amis.com
2002 Semiconductor, Inc. Semiconductor makes warranty products, other than those expressly contained company's standard warranty contained Semiconductor's Terms Conditions. company assumes responsibility errors which appear this document, reserves right change devices specifications detailed herein time without notice, does make commitment update information contained herein. licenses patents other intellectual property Semiconductor granted company connection with sale Semiconductor products, expressly implication.

100Hz 100MHz Variable Gain Amplifier Fully differential input output u

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