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參數資料
| 型號： | OP777AR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Precision Micropower Single Supply Operational Amplifier |
| 中文描述： | OP-AMP, 200 uV OFFSET-MAX, 0.7 MHz BAND WIDTH, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數： | 10/12頁 |
| 文件大小： | 162K |
| 代理商： | OP777AR |
OP777
–10–
REV. 0
BASIC OPERATION
The OP777 amplifier uses a precision Bipolar PNP input stage
coupled with a high-voltage CMOS output stage. This enables
this amplifier to feature an input voltage range which includes the
negative supply voltage (often ground-in single-supply applications)
and also swing to within 1 mV of the output rails. Additionally, the
input voltage range extends to within 1 V of the positive supply rail.
The epitaxial PNP input structure provides high breakdown voltage,
high gain, and input bias current figure comparable to that obtained
with “Darlington” input stage amplifier but without the drawbacks
(i.e., severe penalties for input voltage range, offset, drift and noise).
PNP input structure also greatly lowers the noise and reduces the dc
input error terms.
Supply Voltage
The amplifiers are fully specified with a single 5 V supply and, due
to design and process innovations, can also operate with a supply
voltage from 2.7 V up to 30 V. This allows operation from most
split supplies used in current industry practice, with the advantage
of substantially increased input and output voltage ranges over
conventional split-supply amplifiers. The OP777 series is specified
with (V
SY
= 5 V, V– = 0 V and V
CM
= 2.5 V which is most suitable
for single supply application. With PSRR of 130 dB (0.3
μ
V/V) and
CMRR of 110 dB (3
μ
V/V) offset is minimally affected by power
supply or common-mode voltages. Dual supply,
±
15 V operation
is also fully specified.
Input Common-Mode Voltage Range
The OP777 is rated with an input common-mode voltage which
extends from minus supply to 1 V of the Positive supply. However,
the amplifier can still operate with input voltages slightly below
V
EE
. In Figure 43, OP777 is configured as a difference amplifier
with a single supply of 2.7 V and negative dc common-mode volt-
ages applied at the inputs terminals. A 400 mV p-p input is then
applied to the noninverting input. It can be seen from the graph
below that the output does not show any distortion. Micropower
operation is maintained by using large input and feedback resistors.
TIME
–
0.2ms/DIV
V
–
V
IN
V
OUT
0V
Figure 42. Input and Output Signals with V
CM
< 0 V
+3V
OP777
100k
100k
100k
100k
0.1V
V
IN
= 1kHz at 400mV p-p
0.27V
Figure 43. OP777 Configured as a Difference Amplifier
Operating at V
CM
< 0 V
Input Over Voltage Protection
When the input of an amplifier is more than a diode drop below
V
EE
, large currents will flow from the substrate (V– pin) to the
input pins which can destroy the device. In the case of OP777,
differential voltage equal to the supply voltage will not cause any
problem (see Figure 44). OP777 has built in 500
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 context 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 precision op amps. Unfortunately, such
clamp diodes greatly interfere with many application circuits such
as precision rectifiers and comparators. The OP777 series is free
from such limitations.
30V
V p-p = 32 V
OP777
Figure 44a. Unity Gain Follower
TIME
–
400 s/DIV
V
–
V
SY
= 15V
V
IN
V
OUT
Figure 44b. Input Voltage Can Exceed the Supply Voltage
Without Damage
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PDF描述 |
|---|---|
| OP777ARM | Precision Micropower Single Supply Operational Amplifier |
| OP777 | Precision Micropower Single Supply Operational Amplifier |
| OP77GS | NEXT GENERATION OP07, ULTRALOW OFFSET VOLTAGE OPERATIONAL AMPLIFIER |
| OP77FJ | NEXT GENERATION OP07, ULTRALOW OFFSET VOLTAGE OPERATIONAL AMPLIFIER |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| OP777ARM | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision Micropower Single-Supply Operational Amplifiers |
| OP777ARM-R2 | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R O/P ±15V/30V 8-Pin MSOP T/R 制造商:Rochester Electronics LLC 功能描述:SINGLE PRECISION RAIL-RAIL OP AMP - Bulk |
| OP777ARM-REEL | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R O/P ±15V/30V 8-Pin MSOP T/R |
| OP777ARMZ | 功能描述:IC OPAMP GP R-R 700KHZ 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產品培訓模塊:Differential Circuit Design Techniques for Communication Applications 標準包裝:1 系列:- 放大器類型:RF/IF 差分 電路數:1 輸出類型:差分 轉換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤，CSP 供應商設備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT |
| OP777ARMZ-R2 | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R O/P ±15V/30V 8-Pin MSOP T/R 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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