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| 型号： | AD8532ARMZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP R-R CMOS 3MHZ 8MSOP |
| 标准包装： | 1 |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 5 V/µs |
| 增益带宽积： | 3MHz |
| 电流 - 输入偏压： | 5pA |
| 电压 - 输入偏移： | 25000µV |
| 电流 - 电源： | 750µA |
| 电流 - 输出 / 通道： | 250mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 6 V，±1.35 V ~ 3 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 766 (CN2011-ZH PDF) |
| 其它名称： | AD8532ARMZ-REELDKR |
AD8531/AD8532/AD8534
Rev. F | Page 13 of 20
5V
RS
5
CS
1F
VOUT
VIN
100mV p-p
AD8532
01
09
9-
0
40
CL
47nF
OUTPUT PHASE REVERSAL
Some operational amplifiers designed for single-supply operation
exhibit an output voltage phase reversal when their inputs are
driven beyond their useful common-mode range. The AD8531/
AD8532/AD8534 are free from reasonable input voltage range
restrictions, provided that input voltages no greater than the
supply voltage rails are applied. Although the output of the
device does not change phase, large currents can flow through
internal junctions to the supply rails, which was described in the
Input Overvoltage Protection section. Without limit, these fault
currents can easily destroy the amplifier. The technique
recommended in the Input Overvoltage Protection section
should therefore be applied in those applications where the
possibility of input voltages exceeding the supply voltages exists.
Figure 40. Snubber Network Compensates for Capacitive Loads
The first step is to determine the value of the resistor, RS. A good
starting value is 100 Ω. This value is reduced until the small signal
transient response is optimized. Next, CS is determined; 10 μF is a
good starting point. This value is reduced to the smallest value
for acceptable performance (typically, 1 μF). For the case of a
47 nF load capacitor on the AD8531/AD8532/AD8534, the
optimal snubber network is 5 Ω in series with 1 μF. The benefit
is immediately apparent, as seen in Figure 41. The top trace was
taken with a 47 nF load, and the bottom trace was taken with
the 5 Ω in series with a 1 μF snubber network in place. The
amount of overshoot and ringing is dramatically reduced. Table 5
illustrates a few sample snubber networks for large load
capacitors.
CAPACITIVE LOAD DRIVE
The AD8531/AD8532/AD8534 exhibit excellent capacitive load
driving capabilities. They can drive up to 10 nF directly, as
shown in Figure 25 through Figure 28. However, even though
the device is stable, a capacitive load does not come without a
penalty in bandwidth. As shown in Figure 39, the bandwidth is
reduced to less than 1 MHz for loads greater than 10 nF. A snubber
network on the output does not increase the bandwidth, but it
does significantly reduce the amount of overshoot for a given
capacitive load. A snubber consists of a series RC network (RS,
device to ground. This network operates in parallel with the
load capacitor, CL, to provide phase lag compensation. The
actual value of the resistor and capacitor is best determined
empirically.
Table 5. Snubber Networks for Large Capacitive Loads
Load Capacitance (CL)
Snubber Network (RS, CS)
0.47 nF
300 Ω, 0.1 μF
4.7 nF
30 Ω, 1 μF
47 nF
5 Ω, 1 μF
0
10
99-
041
10
0%
100
47nF LOAD
ONLY
SNUBBER
IN CIRCUIT
90
10s
50mV
CAPACITIVE LOAD (nF)
BANDW
IDI
T
H
(
M
Hz
)
3.5
4.0
3.0
2.5
2.0
1.5
1.0
0.5
0
0.01
0.1
1
10
100
01
099
-03
9
VS = ±2.5V
RL = 1k
TA = 25°C
Figure 41. Overshoot and Ringing Are Reduced by Adding a Snubber
Network in Parallel with the 47 nF Load
Figure 39. Unity-Gain Bandwidth vs. Capacitive Load
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| AD8532AR-REEL | 功能描述:IC OPAMP GP R-R CMOS 3MHZ 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:160 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:10 V/µs 增益带宽积:9MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:250µV 电流 - 电源:730µA 电流 - 输出 / 通道:28mA 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:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 |
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| AD8532ARU | 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R I/O 6V 8-Pin TSSOP 制造商:Rochester Electronics LLC 功能描述:CMOS RAIL/RAIL INPUT/OUTPUT OP AMP - Bulk |
| AD8532ARU-REEL | 功能描述:IC OPAMP GP R-R CMOS 3MHZ 8TSSOP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:160 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:10 V/µs 增益带宽积:9MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:250µV 电流 - 电源:730µA 电流 - 输出 / 通道:28mA 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:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 |
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