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See Technical Specifications

AD630AR

Balanced Mod/Dmod 20-Pin SOIC W

Manufacturer:

Analog Devices, Inc
Mfr.Part #:

AD630AR
Datasheet:

AD630AR Datasheet (PDF)
place:

Philippines
launch_date:

Oct 31, 1995
last_inspection_date:

+90
supplier_cage_code:

24355
EDA/CAD Models:

Request Free CAD Models for AD630AR

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

AD630AR General Description

The AD630 is a high precision balanced modulator/demodulatorthat combines a flexible commutating architecture with theaccuracy and temperature stability afforded by laser wafer trimmedthin film resistors. A network of on-board applications resistorsprovides precision closed-loop gains of ±1 and ±2 with 0.05%accuracy (AD630B). These resistors may also be used to accuratelyconfigure multiplexer gains of 1, 2, 3, or 4. External feedbackenables high gain or complex switched feedback topologies.

The AD630 can be thought of as a precision op amp with twoindependent differential input stages and a precision comparatorthat is used to select the active front end. The rapid responsetime of this comparator coupled with the high slew rate and fastsettling of the linear amplifiers minimize switching distortion.

The AD630 is used in precision signal processing and instrumentationapplications that require wide dynamic range. Whenused as a synchronous demodulator in a lock-in amplifierconfiguration, the AD630 can recover a small signal from100 dB of interfering noise (see the Lock-In AmplifierApplications section). Although optimized for operation up to1 kHz, the circuit is useful at frequencies up to several hundredkilohertz.

Other features of the AD630 include pin programmable frequencycompensation; optional input bias current compensationresistors, common-mode and differential-offset voltage adjustment,and a channel status output that indicates which of thetwo differential inputs is active.

Product Highlights

The application flexibility of the AD630 makes it the bestchoice for applications that require precisely fixed gain,switched gain, multiplexing, integrating-switchingfunctions, and high speed precision amplification.

The 100 dB dynamic range of the AD630 exceeds that ofany hybrid or IC balanced modulator/demodulator and iscomparable to that of costly signal processing instruments.

The op amp format of the AD630 ensures easy implementationof high gain or complex switched feedbackfunctions. The application resistors facilitate the implementationof most common applications with no additional parts.

The AD630 can be used as a 2-channel multiplexer with gainsof 1, 2, 3, or 4. The channel separation of 100 dB at 10 kHzapproaches the limit achievable with an empty IC package.

Laser trimming of the comparator and amplifying channeloffsets eliminate the need for external nulling in most cases.

Key Features

Recovers signal from 100 dB noise
2 MHz channel bandwidth
45 V/µs slew rate
Low crosstalk: −120 dB at 1 kHz, −100 dB at 10 kHz
Pin programmable, closed-loop gains of ±1 and ±2
0.05% closed-loop gain accuracy and match
100 µV channel offset voltage (AD630)
350 kHz full power bandwidth
Chips available

Application

Balanced modulation and demodulation
Synchronous detection
Phase detection
Quadrature detection
Phase sensitive detection
Lock in amplification
Square wave multiplication

Specifications

place	Philippines	launch_date	Oct 31, 1995
last_inspection_date	+90	supplier_cage_code	24355
htsusa	8542390001	schedule_b	8542390000
ppap	False	aec	False