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| 型號： | TLV2453IDRG4 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FAMILY OF 23-mA 220-kHz RAIL-TO-RAIL INPUT/OUTPUT OPERATIONAL AMPLIFIERS WITH SHUTDOWN |
| 中文描述： | 家庭的23 mA的220 - kHz的軌到軌輸入/輸出運算放大器，具有關(guān)斷 |
| 文件頁數(shù)： | 26/45頁 |
| 文件大小： | 1055K |
| 代理商： | TLV2453IDRG4 |
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μ
SLOS218F DECEMBER 1998 REVISED JANUARY 2005
26
POST OFFICE BOX 14WWW.TI.COM
HOUSTON, TEXAS 772511443
APPLICATION INFORMATION
shutdown function
Three members of the TLV245x family (TLV2450/3/5) have a shutdown terminal for conserving battery life in
portable applications. When the shutdown terminal is pulled to the voltage level on the GND terminal of the
device, the supply current is reduced to 16 nA/channel, the amplifier is disabled, and the outputs are placed in
a high impedance mode. To enable the amplifier, the shutdown terminal must be pulled high. The shutdown
terminal should never be left floating. The shutdown terminal threshold is always referenced to the GND terminal
of the device. Therefore, when operating the device with split supply voltages (e.g.
±
2.5 V), the shutdown
terminal needs to be pulled to V
DD
(not system ground) to disable the operational amplifier.
The amplifier’s output with a shutdown pulse is shown in Figures 42, 43, 44, and 45. The amplifier is powered
with a single 5-V supply and configured as a noninverting configuration with a gain of 5. The amplifier turnon
and turnoff times are measured from the 50% point of the shutdown pulse to the 50% point of the output
waveform. The times for the single, dual, and quad are listed in the data tables.
Figures 46 and 47 show the amplifier’s forward and reverse isolation in shutdown. The operational amplifier is
powered by
±
1.35-V supplies and configured as a voltage follower (A
V
= 1). The isolation performance is plotted
across frequency using 0.1-V
PP
, 1.5-V
PP
, and 2.5-V
PP
input signals. During normal operation, the amplifier
would not be able to handle a 2.5-V
PP
input signal with a supply voltage of
±
1.35 V since it exceeds the
common-mode input voltage range (V
ICR
). However, this curve illustrates that the amplifier remains in shutdown
even under a worst case scenario.
driving a capacitive load
When the amplifier is configured in this manner, capacitive loading directly on the output will decrease the
device’s phase margin leading to high frequency ringing or oscillations. Therefore, for capacitive loads of greater
than 10 pF, it is recommended that a resistor be placed in series (R
NULL
) with the output of the amplifier, as
shown in Figure 49. A minimum value of 20
should work well for most applications.
CLOAD
RF
Input
Output
RG
RNULL
+
Figure 49. Driving a Capacitive Load
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TLV2455INE4 | FAMILY OF 23-mA 220-kHz RAIL-TO-RAIL INPUT/OUTPUT OPERATIONAL AMPLIFIERS WITH SHUTDOWN |
| TLV2450IP | FAMILY OF 23-mA 220-kHz RAIL-TO-RAIL INPUT/OUTPUT OPERATIONAL AMPLIFIERS WITH SHUTDOWN |
| TLV2450CDBV | FAMILY OF 23-mA 220-kHz RAIL-TO-RAIL INPUT/OUTPUT OPERATIONAL AMPLIFIERS WITH SHUTDOWN |
| TLV2450IDBV | FAMILY OF 23-mA 220-kHz RAIL-TO-RAIL INPUT/OUTPUT OPERATIONAL AMPLIFIERS WITH SHUTDOWN |
| TLV2453CN | FAMILY OF 23-mA 220-kHz RAIL-TO-RAIL INPUT/OUTPUT OPERATIONAL AMPLIFIERS WITH SHUTDOWN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLV2453IN | 功能描述:運算放大器 - 運放 Dual Rail-Rail 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 |
| TLV2453INE4 | 功能描述:運算放大器 - 運放 Dual Mcpwr R-to-R I/O Op Amp w/Shutdwn 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 |
| TLV2454AID | 功能描述:運算放大器 - 運放 Quad Rail-Rail 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 |
| TLV2454AIDG4 | 功能描述:運算放大器 - 運放 Quad Mcrpwr R-to-R Input/Output Op Amp 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 |
| TLV2454AIDR | 功能描述:運算放大器 - 運放 Quad Mcrpwr R-to-R Input/Output Op Amp 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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