参数资料
型号: AD813AR-14
厂商: Analog Devices Inc
文件页数: 10/19页
文件大小: 0K
描述: IC TRPL VIDEO AMP SNGL LP 14SOIC
标准包装: 56
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: 表面贴装
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
供应商设备封装: 14-SOICN
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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