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参数资料
| 型号： | AD8648ARZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP R-R 24MHZ LN 14SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 通用 |
| 电路数： | 4 |
| 输出类型： | 满摆幅 |
| 转换速率： | 11 V/µs |
| 增益带宽积： | 24MHz |
| 电流 - 输入偏压： | 0.3pA |
| 电压 - 输入偏移： | 600µV |
| 电流 - 电源： | 1.5mA |
| 电流 - 输出 / 通道： | 120mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V |
| 工作温度： | -40°C ~ 125°C |
| 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-SOIC |
| 包装： | 带卷 (TR) |
Data Sheet
AD8646/AD8647/AD8648
Rev. E | Page 15 of 20
THEORY OF OPERATION
POWER-DOWN OPERATION
The shutdown function of the AD8647 is referenced to the
negative supply voltage of the operational amplifier. A logic
level high (> 2.0 V) enables the device, while a logic level low
(< 0.8 V) disables the device and places the output in a high
impedance condition. Several outputs can be wire-OR’ed, thus
eliminating a multiplexer. The logic input is a high impedance
CMOS input. If dual or split supplies are used, the logic signals
must be properly referred to the negative supply voltage.
MULTIPLEXING OPERATION
Because each op amp has a separate logic input enable pin, the
outputs can be connected together if it can be guaranteed that
only one op amp is active at any time. By connecting the op amps
as shown in Figure 48, a multiplexer can be eliminated. With
the reasonably short turn-on and turn-off times, low frequency
signal paths can be smoothly selected. The turn-off time is
slightly faster than the turn-on time so, even when using
sections from two different packages, the overlap is less than
300 nanoseconds.
06
52
7-
0
49
1/2
AD8647
1/2
AD8647
9
1
10
5V
6
7
8
2
3
4
5
2
13kHz
5kHz
2kHz
Figure 48. AD8647 Output Switching
06
52
7-
0
50
TIME (200s/DIV)
0V
5V
0V
2V
1V
Figure 49. Switching Waveforms
80
70
60
50
40
30
20
10
0
–10
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
VIN_SDA AND VIN_SDB (V)
S
UP
P
L
Y
CURRE
NT
(
A)
06
52
7-
05
1
VSY = 5V
VSY = 2.7V
Figure 50. Supply Current Shutdown Mode, AD8647
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相关代理商/技术参数 |
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|---|---|
| AD8648WARUZ | 制造商:Analog Devices 功能描述: |
| AD8648WARUZ-RL | 制造商:Analog Devices 功能描述: |
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