Low Power
Video Op Amp with Disable
a
AD810
CO NNECTIO N D IAGRAM
FEATURES
High Speed
8-P in P lastic Mini-D IP (N), SO IC (R)
and Cer dip (Q ) P ackages
80 MHz Bandw idth (3 dB, G = +1)
75 MHz Bandw idth (3 dB, G = +2)
1000 V/ s Slew Rate
50 ns Settling Tim e to 0.1% (VO = 10 V Step)
Ideal for Video Applications
30 MHz Bandw idth (0.1 dB, G = +2)
0.02% Differential Gain
OFFSET
1
2
8
7
6
DISABLE
AD810
NULL
–IN
+V
S
+IN
3
4
OUTPUT
OFFSET
NULL
5
–V
S
TOP VIEW
0.04؇ Differential Phase
Low Noise
2.9 nV/ √Hz Input Voltage Noise
13 pA/ √Hz Inverting Input Current Noise
Low Pow er
8.0 m A Supply Current m ax
2.1 m A Supply Current (Pow er-Dow n Mode)
High Perform ance Disable Function
Turn-Off Tim e 100 ns
Break Before Make Guaranteed
Input to Output Isolation of 64 dB (OFF State)
Flexible Operation
P RO D UCT D ESCRIP TIO N
T he AD810 is a composite and HDT V compatible, current
feedback, video operational amplifier, ideal for use in systems
such as multimedia, digital tape recorders and video cameras.
T he 0.1 dB flatness specification at bandwidth of 30 MHz
(G = +2) and the differential gain and phase of 0.02% and
0.04° (NT SC) make the AD810 ideal for any broadcast quality
video system. All these specifications are under load conditions
of 150 Ω (one 75 Ω back terminated cable).
T he AD810 is ideal for power sensitive applications such as
video cameras, offering a low power supply current of 8.0 mA
max. T he disable feature reduces the power supply current to
only 2.1 mA, while the amplifier is not in use, to conserve
power. Furthermore the AD810 is specified over a power supply
range of ±5 V to ±15 V.
Specified for ؎5 V and ؎15 V Operation
؎2.9 V Output Sw ing Into a 150 ⍀ Load (VS = ؎5 V)
APPLICATIONS
Professional Video Cam eras
Multim edia System s
NTSC, PAL & SECAM Com patible System s
Video Line Driver
ADC/ DAC Buffer
T he AD810 works well as an ADC or DAC buffer in video
systems due to its unity gain bandwidth of 80 MHz. Because the
AD810 is a transimpedance amplifier, this bandwidth can be
maintained over a wide range of gains while featuring a low
noise of 2.9 nV/√Hz for wide dynamic range applications.
DC Restoration Circuits
0.20
0.18
0.16
0.14
0.12
0.10
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0
GAIN = +2
GAIN = +2
R
R
f
= 715Ω
= 150Ω
= 3.58MHz
F
L
–45
R
= 150Ω
L
PHASE
GAIN
C
–90
100 IRE
MODULATED RAMP
1
0
–135
–180
V
S
= ±15V
±5V
GAIN
–225
–270
0.08
0.06
0.04
–1
–2
PHASE
±2.5V
V
= ±15V
S
–3
–4
±5V
0.02
0
±2.5V
–5
5
6
7
8
9
10
11
12
13
14
15
1
10
100
FREQUENCY – MHz
1000
SUPPLY VOLTAGE – ± Volts
Closed-Loop Gain and Phase vs. Frequency, G = +2,
Differential Gain and Phase vs. Supply Voltage
RL = 150, RF = 715 Ω
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