参数资料
| 型号： | OP777ARZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP R-R 700KHZ 8SOIC |
| 标准包装： | 98 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.2 V/µs |
| 增益带宽积： | 700kHz |
| 电流 - 输入偏压： | 5nA |
| 电压 - 输入偏移： | 30µV |
| 电流 - 电源： | 300µA |
| 电流 - 输出 / 通道： | 30mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 30 V，±1.35 V ~ 15 V |
| 工作温度： | -40°C ~ 85°C |
| 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： | 管件 |
| 产品目录页面： | 774 (CN2011-ZH PDF) |
REV.
OP777/OP727/OP747
–11–
Input Over Voltage Protection
When the input of an amplifier is more than a diode drop below
VEE, or above V CC, large currents will flow from the substrate
(V–) or the positive supply (V+), respectively, to the input pins
which can destroy the device. In the case of OP777/OP727/
OP747, differential voltages equal to the supply voltage will not
cause any problem (see Figure 3). OP777/OP727/OP747 has
built- in 500
Ω internal current limiting resistors, in series with the
inputs, to minimize the chances of damage. It is a good practice to
keep the current flowing into the inputs below 5 mA. In this con-
text it should also be noted that the high breakdown of the input
transistors removes the necessity for clamp diodes between the
inputs of the amplifier, a feature that is mandatory on many preci-
sion op amps. Unfortunately, such clamp diodes greatly interfere
with many application circuits such as precision rectifiers and
comparators. The OP777/OP727/OP747 series is free from such
limitations.
30V
V p-p = 32V
OP777/
OP727/
OP747
Figure 3a. Unity Gain Follower
TIME – 400 s/DIV
VOLTAGE
–
5V/DIV
VSY = 15V
VIN
VOUT
Figure 3b. Input Voltage Can Exceed the Supply Voltage
Without Damage
Phase Reversal
Many amplifiers misbehave when one or both of the inputs are
forced beyond the input common-mode voltage range. Phase
reversal is typified by the transfer function of the amplifier effectively
reversing its transfer polarity. In some cases this can cause lockup in
servo systems and may cause permanent damage or nonrecoverable
parameter shifts to the amplifier. Many amplifiers feature compensa-
tion circuitry to combat these effects, but some are only effective for
the inverting input. Additionally, many of these schemes only work
for a few hundred millivolts or so beyond the supply rails. OP777/
OP727/OP747 has a protection circuit against phase reversal
when one or both inputs are forced beyond their input common-
mode voltage range. It is not recommended that the parts be
continuously driven more than 3 V beyond the rails.
TIME – 400 s/DIV
VOLTAGE
–
5V/DIV
VSY = 15V
VIN
VOUT
Figure 4. No Phase Reversal
Output Stage
The CMOS output stage has excellent (and fairly symmetric) output
drive and with light loads can actually swing to within 1 mV of both
supply rails. This is considerably better than similar amplifiers
featuring (so-called) rail-to-rail bipolar output stages. OP777/
OP727/OP747 is stable in the voltage follower configuration and
responds to signals as low as 1 mV above ground in single supply
operation.
V TO 30V
VIN = 1mV
OP777/
OP727/
OP747
VOUT = 1mV
Figure 5. Follower Circuit
TIME – 10 s/DIV
VOLTAGE
–
25mV/DIV
1.0mV
Figure 6. Rail-to-Rail Operation
Output Short Circuit
The output of the OP777/OP727/OP747 series amplifier is protected
from damage against accidental shorts to either supply voltage,
provided that the maximum die temperature is not exceeded on a
long-term basis (see Absolute Maximum Rating section). Current of
up to 30 mA does not cause any damage.
A Low-Side Current Monitor
In the design of power supply control circuits, a great deal of design
effort is focused on ensuring a pass transistor’s long-term reliability
over a wide range of load current conditions. As a result, monitoring
D
3.0
相关PDF资料 |
PDF描述 |
|---|---|
| LT1636CN8#PBF | IC OPAMP R-R IN/OUT 220KHZ 8-DIP |
| SFML-145-T1-S-D | CONN RCPT .05" 90POS DUAL T/H |
| SFM-140-L2-S-D-A | CONN RECEPT 80POS .050" SMT |
| SMF5.0AT1G | TVS ZENER 200W 5V SOD123FL |
| 68046-233LF | CONN RCPT 66POS .100" DBL SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| OP777ARZ-REEL | 功能描述:IC OPAMP GP R-R 700KHZ 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°C 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-SO 包装:带卷 (TR) |
| OP777ARZ-REEL7 | 功能描述:IC OPAMP GP R-R 700KHZ 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°C 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-SO 包装:带卷 (TR) |
| OP77AJ | 制造商:AD 制造商全称:Analog Devices 功能描述:NEXT GENERATION OP07, ULTRALOW OFFSET VOLTAGE OPERATIONAL AMPLIFIER |
| OP77AJMDA | 制造商:AD 制造商全称:Analog Devices 功能描述:Next Generation OP07 Ultralow Offset Voltage Operational Amplifier |
| OP77AZ | 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述:ULTRA-LOW OFFSET VOLTAGE - Bulk |
发布紧急采购，3分钟左右您将得到回复。