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High Speed, Video Difference Amplifier AD830

FEATURES Differential Amplification Wide Common-Mode Voltage Range: +12.8 V, –12 V Differential Voltage Range: ؎2 V High CMRR: 60 dB @ 4 MHz Built-in Differential Clipping Level: ؎2.3 V Fast Dynamic Performance 85 MHz Unity Gain Bandwidth 35 ns Settling Time to 0.1% 360 V/␮s Slew Rate Symmetrical Dynamic Response Excellent Video Specifications Differential Gain Error: 0.06% Differential Phase Error: 0.08؇ 15 MHz (0.1 dB) Bandwidth Flexible Operation High Output Drive of ؎50 mA min Specified with Both ؎5 V and ؎15 V Supplies Low Distortion: THD = –72 dB @ 4 MHz Excellent DC Performance: 3 mV max Input Offset Voltage APPLICATIONS Differential Line Receiver High Speed Level Shifter High Speed In-Amp Differential to Single Ended Conversion Resistorless Summation and Subtraction High Speed A/D Driver

CONNECTION DIAGRAM 8-Pin Plastic Mini-DIP (N), Cerdip (Q) and SOIC (R) Packages

X1

AD830

8

VP

7

OUT

6

NC

5

1

VN

V→1 X2

2 A=1

Y1

3 V→1

Y2

4

NC = NO CONNECT

input and produces an output voltage referred to a user-chosen level. The undesired common-mode signal is rejected, even at high frequencies. High impedance inputs ease interfacing to finite source impedances and thus preserve the excellent common-mode rejection. In many respects, it offers significant improvements over discrete difference amplifier approaches, in particular in high frequency common-mode rejection. The wide common-mode and differential-voltage range of the AD830 make it particularly useful and flexible in level shifting applications, but at lower power dissipation than discrete solutions. Low distortion is preserved over the many possible differential and common-mode voltages at the input and output.

PRODUCT DESCRIPTION

The AD830 is a wideband, differencing amplifier designed for use at video frequencies but also useful in many other applications. It accurately amplifies a fully differential signal at the

Good gain flatness and excellent differential gain of 0.06% and phase of 0.08° make the AD830 suitable for many video system applications. Furthermore, the AD830 is suited for general purpose signal processing from dc to 10 MHz.

110

9 6

100

VS = ±5V RL = 150Ω

3

CL = 33pF

90 80

VS = ±15V

70 60

VS = ±5V

GAIN – dB

CMRR – dB

0 –3 CL = 4.7pF

–6 –9 –12

CL = 15pF

50 –15 40

–18

30 1k

10k

100k

1M

10M

FREQUENCY – Hz

Common-Mode Rejection Ratio vs. Frequency

–21 10k

100k

1M

10M

100M

1G

FREQUENCY – Hz

Closed-Loop Gain vs. Frequency, Gain = +1

REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703


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