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| 型号： | AD812ARZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP DUAL CURR-FDBK 8-SOIC |
| 标准包装： | 750 |
| 应用： | 电流反馈 |
| 电路数： | 2 |
| -3db带宽： | 145MHz |
| 转换速率： | 1600 V/µs |
| 电流 - 电源： | 4.5mA |
| 电流 - 输出 / 通道： | 50mA |
| 电压 - 电源，单路/双路(±)： | 2.4 V ~ 36 V，±1.2 V ~ 18 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
AD812
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.
Dual, Current Feedback
Low Power Op Amp
PIN CONFIGURATION
8-Lead Plastic
Mini-DIP and SOIC
OUT1
–IN1
+IN1
V+
OUT2
–IN2
+IN2
V–
AD812
+
4
3
2
1
5
6
7
8
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1998
REV. B
FEATURES
Two Video Amplifiers in One 8-Lead SOIC Package
Optimized for Driving Cables in Video Systems
Excellent Video Specifications (RL = 150
):
Gain Flatness 0.1 dB to 40 MHz
0.02% Differential Gain Error
0.02 Differential Phase Error
Low Power
Operates on Single +3 V Supply
5.5 mA/Amplifier Max Power Supply Current
High Speed
145 MHz Unity Gain Bandwidth (3 dB)
1600 V/ s Slew Rate
Easy to Use
50 mA Output Current
Output Swing to 1 V of Rails (150
Load)
APPLICATIONS
Video Line Driver
Professional Cameras
Video Switchers
Special Effects
PRODUCT DESCRIPTION
The AD812 is a low power, single supply, dual video amplifier.
Each of the amplifiers have 50 mA of output current and are
optimized for driving one back-terminated video load (150
)
each. Each amplifier is a current feedback amplifier and fea-
tures gain flatness of 0.1 dB to 40 MHz while offering differen-
tial gain and phase error of 0.02% and 0.02
°. This makes the
AD812 ideal for professional video electronics such as cameras
and video switchers.
–0.1
–0.6
1M
100M
10M
–0.2
–0.3
–0.4
–0.5
0
0.1
NORMALIZED
GAIN
–
dB
100k
FREQUENCY – Hz
0.2
0.3
0.4
G = +2
RL = 150
5V
3V
VS = 15V
5V
Figure 1. Fine-Scale Gain Flatness vs. Frequency, Gain
= +2, RL = 150
The AD812 offers low power of 4.0 mA per amplifier max (VS =
+5 V) and can run on a single +3 V power supply. The outputs
of each amplifier swing to within one volt of either supply rail to
easily accommodate video signals of 1 V p-p. Also, at gains of
+2 the AD812 can swing 3 V p-p on a single +5 V power sup-
ply. All this is offered in a small 8-lead plastic DIP or 8-lead
SOIC package. These features make this dual amplifier ideal
for portable and battery powered applications where size and
power is critical.
The outstanding bandwidth of 145 MHz along with 1600 V/
s
of slew rate make the AD812 useful in many general purpose
high speed applications where a single +5 V or dual power sup-
plies up to
±15 V are available. The AD812 is available in the
industrial temperature range of –40
°C to +85°C.
15
0.06
0.02
6
0.04
5
0.08
14
12
11
10
13
9
8
7
SUPPLY VOLTAGE –
Volts
DIFFERENTIAL
PHASE
–
Degrees
0.06
0.02
0.04
DIFFERENTIAL
GAIN
–
%
0
DIFFERENTIAL GAIN
DIFFERENTIAL PHASE
Figure 2. Differential Gain and Phase vs. Supply Voltage,
Gain = +2, RL = 150
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