High Speed, Video
Difference Amplifier
a
AD830
CO NNECTIO N D IAGRAM
FEATURES
Differential Am plification
8-P in P lastic Mini-D IP (N),
Wide Com m on-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 Dynam ic Perform ance
85 MHz Unity Gain Bandw idth
35 ns Settling Tim e to 0.1%
360 V/ s Slew Rate
Sym m etrical Dynam ic Response
Excellent Video Specifications
Differential Gain Error: 0.06%
Differential Phase Error: 0.08؇
15 MHz (0.1 dB) Bandw idth
Cerdip (Q) and SO IC (R) P ackages
AD830
V
X1
X2
Y1
Y2
1
2
3
4
8
7
6
5
P
V→1
V→1
OUT
NC
A=1
V
N
NC = NO CONNECT
Flexible Operation
High Output Drive of ؎50 m A m in
Specified w ith Both ؎5 V and ؎15 V Supplies
Low Distortion: THD = –72 dB @ 4 MHz
Excellent DC Perform ance: 3 m V m ax Input Offset
Voltage
input and produces an output voltage referred to a user-chosen
level. T he 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.
APPLICATIONS
Differential Line Receiver
High Speed Level Shifter
High Speed In-Am p
Differential to Single Ended Conversion
Resistorless Sum m ation and Subtraction
High Speed A/ D Driver
T he 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.
P RO D UCT D ESCRIP TIO N
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.
T he 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
9
V
= ±5V
S
6
3
R
= 150Ω
L
C
= 33pF
L
0
80
V
= ±15V
–3
S
C
= 4.7pF
L
70
60
50
40
30
–6
–9
V
= ±5V
S
–12
–15
–18
–21
C
= 15pF
L
10k
100k
1M
10M
100M
1G
1k
10k
100k
1M
10M
FREQUENCY – Hz
FREQUENCY – Hz
Com m on-Mode Rejection Ratio vs. Frequency
Closed-Loop Gain vs. Frequency, Gain = +1
REV. A
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.
Tel: 617/ 329-4700 Fax: 617/ 326-8703