器件名称: AD883B
功能描述: Balanced Modulator/Demodulator
文件大小: 288.39KB 共8页
简 介:a
FEATURES Recovers Signal from +100 dB Noise 2 MHz Channel Bandwidth 45 V/ s Slew Rate –120 dB Crosstalk @ 1 kHz Pin Programmable Closed Loop Gains of 1 and 2 0.05% Closed Loop Gain Accuracy and Match 100 V Channel Offset Voltage (AD630BD) 350 kHz Full Power Bandwidth Chips Available
Balanced Modulator/Demodulator AD630
FUNCTIONAL BLOCK DIAGRAM
CM OFF ADJ
6
CM OFF ADJ
5
DIFF OFF ADJ
4
DIFF OFF ADJ
3
2.5k RINA
1
AMP A
AD630
12
CHA+ 2 CHA– 20 2.5k RINB 17 CHB+ 18 CHB– 19 –V AMP B A
COMP +VS VOUT RB RF RA CHANNEL STATUS B/A
11 13
B
10k
10k
14 15
5k
PRODUCT DESCRIPTION
16
The AD630 is a high precision balanced modulator which combines a flexible commutating architecture with the accuracy and temperature stability afforded by laser wafer trimmed thin-film resistors. Its signal processing applications include balanced modulation and demodulation, synchronous detection, phase detection, quadrature detection, phase sensitive detection, lock-in amplification and square wave multiplication. A network of on-board applications resistors provides precision closed loop gains of ± 1 and ± 2 with 0.05% accuracy (AD630B). These resistors may also be used to accurately configure multiplexer gains of +1, +2, +3 or +4. Alternatively, external feedback may be employed allowing the designer to implement his own high gain or complex switched feedback topologies. The AD630 may be thought of as a precision op amp with two independent differential input stages and a precision compar……
