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 Ny intressant lågbrus jfet-input opamp - ADA4627-1
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ludo
Member

1196 Posts

Posted - 2009/08/07 :  16:43:36  Show Profile Send ludo a Private Message
ADA4627-1

FEATURES
Low offset voltage: 200 uV maximum
Offset drift: 1 uV/°C typical
Very low input bias current: 5 pA maximum
Extended temperature range: -40ºC to +125ºC
±5 V to ±15 V dual-supply
Guaranteed GBW: 16 MHz
Voltage noise: 6.1 nV/sqrtHz at 1 kHz
High slew rate: 60 V/us
High gain: 120 dB typical
High CMRR: 116 dB typical
High PSRR: 112 dB typical
Low supply current: 7.5 mA maximum

APPLICATIONS
High impedance sensors
Photo diode amplifier
Precision instrumentation
Phase-locked loop filters
High end, professional audio
DAC output amplifier
ATE
Medical

http://www.analog.com/en/amplifiers-and-comparators/operational-amplifiers-op-amps/ada4627-1/products/product.html

Edited by - ludo on 2009/08/07 16:47:04

peranders
Member

2456 Posts

Posted - 2009/08/08 :  21:20:10  Show Profile  Visit peranders's Homepage
Ganska najs men AD745 har lägre brus.

/Per-Anders eller P-A
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ludo
Member

1196 Posts

Posted - 2009/08/09 :  18:15:01  Show Profile Send ludo a Private Message
AD745 (dekompenserad) och AD743 (kompenserad för förtärkning = +/- 1) har läge brus på bekostnad av i princip alla andra parametrar.
Observera exempelvis att distorsionsdata är taget vid olika belastningar; RL= 2k för ad743/745 och RL= 600R för ada4627.
ADA4627 klarar oxå av att driva högre kapacitanser utan instabilitetsproblem.
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peranders
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2456 Posts

Posted - 2009/08/11 :  16:15:58  Show Profile  Visit peranders's Homepage
Kretsen är modernare i de flesta avseenden, så är det.

/Per-Anders eller P-A
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