a
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
PRODUCT DESCRIPTION
X1
X2
Y1
Y2
1
High Speed, Video
Difference Amplifier
AD830
CONNECTION DIAGRAM
8-Pin Plastic Mini-DIP (N),
Cerdip (Q) and SOIC (R) Packages
AD830
V→1
8
7
V
P
OUT
NC
V
N
2
A=1
3
V→1
4
6
5
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 fi-
nite 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 solu-
tions. Low distortion is preserved over the many possible differ-
ential and common-mode voltages at the input and output.
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 pur-
pose signal processing from dc to 10 MHz.
9
6
3
V
S
=
±5V
R
L
= 150Ω
C
L
= 33pF
The AD830 is a wideband, differencing amplifier designed for
use at video frequencies but also useful in many other applica-
tions. It accurately amplifies a fully differential signal at the
110
100
90
0
CMRR – dB
80
70
60
50
GAIN – dB
V
S
=
±15V
–3
–6
–9
–12
C
L
= 15pF
–15
C
L
= 4.7pF
V
S
=
±5V
40
30
1k
10k
100k
FREQUENCY – Hz
1M
10M
–18
–21
10k
100k
1M
10M
100M
1G
FREQUENCY – Hz
Common-Mode Rejection Ratio vs. Frequency
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
AD [ ANALOG DEVICES ]
