CONNECTION DIAGRAM
8-Pin Plastic Mini-DIP (N), SOIC (R)
and Cerdip (Q) Packages
OFFSET
NULL
1
2
3
4
8
7
6
5
TOP VIEW
AD810
DISABLE
+V
S
OUTPUT
OFFSET
NULL
–IN
+IN
–V
S
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.
a
Low Power
Video Op Amp with Disable
AD810
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax: 617/326-8703
FEATURES
High Speed
80 MHz Bandwidth (3 dB, G = +1)
75 MHz Bandwidth (3 dB, G = +2)
1000 V/ms Slew Rate
50 ns Settling Time to 0.1% (V
O
= 10 V Step)
Ideal for Video Applications
30 MHz Bandwidth (0.1 dB, G = +2)
0.02% Differential Gain
0.048 Differential Phase
Low Noise
2.9 nV/√
Hz Input Voltage Noise
13 pA/√
Hz Inverting Input Current Noise
Low Power
8.0 mA Supply Current max
2.1 mA Supply Current (Power-Down Mode)
High Performance Disable Function
Turn-Off Time 100 ns
Break Before Make Guaranteed
Input to Output Isolation of 64 dB (OFF State)
Flexible Operation
Specified for 65 V and 615 V Operation
62.9 V Output Swing Into a 150 V Load (V
S
= 65 V)
APPLICATIONS
Professional Video Cameras
Multimedia Systems
NTSC, PAL & SECAM Compatible Systems
Video Line Driver
ADC/DAC Buffer
DC Restoration Circuits
PRODUCT DESCRIPTION
The AD810 is a composite and HDTV compatible, current
feedback, video operational amplifier, ideal for use in systems
such as multimedia, digital tape recorders and video cameras.
The 0.1 dB flatness specification at bandwidth of 30 MHz
(G = +2) and the differential gain and phase of 0.02% and
0.04° (NTSC) 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).
The AD810 is ideal for power sensitive applications such as
video cameras, offering a low power supply current of 8.0 mA
max. The 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.
The 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.
0.10
0
15
0.03
0.01
6
0.02
5
0.06
0.04
0.05
0.07
0.08
0.09
1413121110987
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
GAIN
PHASE
GAIN = +2
R
F
= 715Ω
R
L
= 150Ω
f
C
= 3.58MHz
100 IRE
MODULATED RAMP
SUPPLY VOLTAGE – ± Volts
DIFFERENTIAL GAIN – %
DIFFERENTIAL PHASE – Degrees
Differential Gain and Phase vs. Supply Voltage
GAIN = +2
R
L
= 150Ω
±2.5V
±5V
±2.5V
PHASE
GAIN
0
–5
10 100
–1
–2
–3
–4
1
1 1000
0
–45
–90
–135
–180
–225
–270
CLOSED-LOOP GAIN – dB
PHASE SHIFT – Degrees
FREQUENCY – MHz
±5V
V
S
= ±15V
V
S
= ±15V
Closed-Loop Gain and Phase vs. Frequency, G = +2,
R
L
= 150, R
F
= 715
Ω
