参数资料
| 型号： | AD813ANZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/19页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP TRIPLE VIDEO LP 14DIP |
| 标准包装： | 25 |
| 应用： | 电流反馈 |
| 电路数： | 3 |
| -3db带宽： | 100MHz |
| 转换速率： | 250 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： | 通孔 |
| 封装/外壳： | 14-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 14-PDIP |
| 包装： | 管件 |
AD813
REV. B
–18–
Single Supply Differential Line Driver
Due to its outstanding overall performance on low supply volt-
ages, the AD813 makes possible exceptional differential trans-
mission on very low power. The circuit of Figure 59 will convert
a single-ended, ground referenced signal to a differential signal
whose common-mode reference is set to one half the supply
voltage. This allows for a greater than 2 V peak-to-peak signal
swing on a single 3 V power supply. A bandwidth over 30 MHz
is achieved with 20 mA of output drive on only 30 mW of quies-
cent power (excluding load current).
+3V
715
1 F
2
11
1 F
715
3
715
1 F
VIN
715
RL2
VOUT–
1
4
715
10k
9k
1k
+3V
1 F
RL1
VOUT+
Figure 59. Single 3 V Supply Differential Line Driver
with 2 V Swing
10
90
100
0%
1V
50ns
VIN
VOUT+ – VOUT–
Figure 60. Differential Driver Pulse Response (VS = 3 V,
RL1 = RL2 = 200 )
3:1 Video Multiplexer
Wiring the amplifier outputs together will form a 3:1 mux with
outstanding gain flatness. Figure 55 shows a recommended
configuration which results in –0.1 dB bandwidth of 20 MHz
and OFF channel isolation of 60 dB at 10 MHz on
±5 V sup-
plies. The time to switch between channels is about 180 ns.
Switching time is only slightly affected by signal level.
10
90
100
0%
5V
500mV
500ns
Figure 56. Channel Switching Characteristic for the
3:1 Mux
100k
1M
100M
10M
FREQUENCY – Hz
–50
–30
–40
–60
–70
–80
–90
FEEDTHROUGH
–
dB
–20
–10
–100
–110
Figure 57. 3:1 Mux OFF Channel Feedthrough vs.
Frequency
1
10
100
FREQUENCY – MHz
–0.5
–3.0
0.5
0
–1.0
–1.5
–2.0
–2.5
CLOSED-LOOP
GAIN
–
dB
0
–45
–90
–135
PHASE
SHIFT
–
Degrees
–180
GAIN
PHASE
Figure 58. 3:1 Mux ON Channel Gain and Phase vs.
Frequency
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