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參數(shù)資料
| 型號： | OPA727 |
| 英文描述： | 20MHz, High Precision CMOS Operational Amplifier |
| 中文描述： | 為20MHz，高精度CMOS運算放大器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 537K |
| 代理商： | OPA727 |
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SBOS314B SEPTEMBER 2004 REVISED DECEMBER 2004
www.ti.com
11
APPLICATIONS INFORMATION
The OPA727 and OPA728 family of op amps use
e-trim
,
an adjustment to offset voltage and temperature drift made
during the final steps of manufacturing after the plastic
molding is completed. This compensates for performance
shifts that can occur during the molding process. Through
e-trim
, the OPA727 and OPA728 deliver excellent offset
voltage (150
μ
V max) and extremely low offset voltage drift
(1.5
μ
V/
°
C). Additionally, these 20MHz CMOS op amps
have a fast slew rate, low noise, and excellent PSRR,
CMRR, and A
OL
. They can operate on typically 4.3mA
quiescent current from a single (or split) supply in the range
of 4V to 12V (
±
2V to
±
6V), making them highly versatile
and easy to use. They are stable in a unity-gain
configuration.
Power-supply pins should be bypassed with 1nF ceramic
capacitors in parallel with 1
μ
F tantalum capacitors.
OPERATING VOLTAGE
OPA727 series op amps are specified from 4V to 12V
supplies over a temperature range of 40
°
C to +125
°
C.
They will operate well in
±
5V or +5V to +12V power-supply
systems. Parameters that vary significantly with operating
voltage or temperature are shown in the Typical
Characteristics.
ENABLE/SHUTDOWN
OPA727 series op amps require approximately 4.3mA
quiescent current. The enable/shutdown feature of the
OPA728 allows the op amp to be shut off to reduce this
current to approximately 6
μ
A.
The enable/shutdown input is referenced to the Enable
Reference Pin, DGND (see
Pin Configurations
). This pin
can be connected to logic ground in dual-supply op amp
configurations to avoid level-shifting the enable logic
signal, as shown in Figure 1.
The Enable Reference Pin voltage, V
DGND
, must not
exceed (V+) 2V. It may be set as low as V. The amplifier
is enabled when the Enable Pin voltage is greater than
V
DGND
+ 2V. The amplifier is disabled (shutdown) if the
Enable Pin voltage is less than V
DGND
+ 0.8V. The Enable
Pin is connected to internal pull-up circuitry and will enable
the device if left unconnected.
COMMON-MODE VOLTAGE RANGE
The input common-mode voltage range of the OPA727
and OPA728 series extends from V to (V+) 2.5V.
Common-mode rejection is excellent throughout the input
voltage range from V to (V+) 3V. CMRR decreases
somewhat as the common-mode voltage extends to
(V+) 2.5V, but remains very good and is tested
throughout this range. See the
Electrical Characteristics
table for details.
DGND
Digital
Logic
Enable
OPA728
+12V
a) SingleSupply Configuration
b) DualSupply Configuration
DGND
Ref
Ref
Digital
Logic
Enable
OPA728
+5V
5V
V
O
V
O
Figure 1. Enable Reference Pin Connection for
Single- and Dual-Supply Configurations
INPUT OVER-VOLTAGE PROTECTION
Device inputs are protected by ESD diodes that will
conduct if the input voltages exceed the power supplies by
more than approximately 300mV. Momentary voltages
greater than 300mV beyond the power supply can be
tolerated if the current is limited to 10mA. This is easily
accomplished with an input resistor in series with the op
amp, as shown in Figure 2. The OPA727 series features
no phase inversion when the inputs extend beyond
supplies, if the input is current limited.
R
OPA727
V+
V
V
IN
V
OUT
10mA max
I
OVERLOAD
Figure 2. Input Current Protection for Voltages
Exceeding the Supply Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA727AIDGKR | 功能描述:運算放大器 - 運放 e-trim 20MHz High Precision CMOS RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA727AIDGKRG4 | 功能描述:運算放大器 - 運放 e-trim 20MHz High Precision CMOS RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA727AIDGKT | 功能描述:運算放大器 - 運放 e-trim 20MHz High Precision CMOS RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA727AIDGKT | 制造商:Texas Instruments 功能描述:IC OP-AMP GP 20MHZ SGL PREC 8MSOP 制造商:Texas Instruments 功能描述:IC, OP-AMP GP 20MHZ SGL PREC 8MSOP 制造商:Texas Instruments 功能描述:IC, OP-AMP GP 20MHZ SGL PREC 8MSOP; Op Amp Type:CMOS; No. of Amplifiers:1; Slew Rate:30V/s; Supply Voltage Range:4V to 12V; Amplifier Case Style:MSOP; No. of Pins:8; Bandwidth:20MHz; Operating Temperature Min:-40C; Operating ;RoHS Compliant: Yes |
| OPA727AIDGKTG4 | 功能描述:運算放大器 - 運放 e-trim 20MHz High Precision CMOS RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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