- 您现在的位置：买卖IC网 > PDF目录136955 > TLV2772QPWG4 (TEXAS INSTRUMENTS INC) DUAL OP-AMP, 2700 uV OFFSET-MAX, 4.8 MHz BAND WIDTH, PDSO8 PDF资料下载
参数资料
| 型号： | TLV2772QPWG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 运算放大器 |
| 英文描述： | DUAL OP-AMP, 2700 uV OFFSET-MAX, 4.8 MHz BAND WIDTH, PDSO8 |
| 封装： | GREEN, PLASTIC, TSSOP-8 |
| 文件页数： | 31/75页 |
| 文件大小： | 2088K |
| 代理商： | TLV2772QPWG4 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页当前第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页
TLV277x, TLV277xA
FAMILY OF 2.7V HIGHSLEW RATE RAILTORAIL OUTPUT
OPERATIONAL AMPLIFIERS WITH SHUTDOWN
SLOS209G JANUARY 1998 REVISED FEBRUARY 2004
37
WWW.TI.COM
APPLICATION INFORMATION
gain calculation
Since the TLV2772 is capable of rail-to-rail output using a 3-V supply, VO = 0 (min) to 3 V (max). With no signal
from the sensor, nominal VO = reference voltage = 1.23 V. Therefore, the maximum negative swing from nominal
is 0 V 1.23 V = 1.23 V and the maximum positive swing is 3 V 1.23 V = 1.77 V. By modeling the shock sensor
as a low impedance voltage source with output of 2.25 mV/g (max) in the x and y axis and 1.70 mV/g (max) in
the z axis, the gain of the circuit is calculated by equation 1.
Gain
+
Output Swing
Sensor Signal
Acceleration
(1)
To avoid saturation of the operational amplifier, the gain calculations are based on the maximum negative swing
of 1.23 V and the maximum sensor output of 2.25 mV/g (x and y axis) and 1.70 mV/g (z axis).
Gain (x, y)
+
* 1.23 V
2.25 mV g
* 50 g
+ 10.9
(2)
Gain (z)
+
–1.23 V
1.70 mV g
–50 g
+ 14.5
(3)
and
By selecting R3 = 10 k
and R4 = 100 k, in the x and y channels, a gain of 11 is realized. By selecting
R3 = 7.5 k
and R4 = 100 k, in the z channel, a gain of 14.3 is realized. The schematic shows the configuration
for either the x- or y-axis.
bandwidth calculation
To calculate the component values for the frequency shaping characteristics of the signal conditioning circuit,
1 Hz and 500 Hz are selected as the minimum required 3-dB bandwidth.
To minimize the value of the input capacitor (C1) required to set the lower cutoff frequency requires a large value
resistor for R2 is required. A 1-M
resistor is used in this example. To set the lower cutoff frequency, the required
capacitor value for C1 is:
C1
+
1
2
p f
LOW R2
+ 0.159 F
(4)
Using a value of 0.22
F, a more common value of capacitor, the lower cutoff frequency is 0.724 Hz.
To minimize the phase shift in the feedback loop caused by the input capacitance of the TLV2772, it is best to
minimize the value of the feedback resistor R4. However, to reduce the required capacitance in the feedback
loop a large value for R4 is required. Therefore, a compromise for the value of R4 must be made. In this circuit,
a value of 100 k
has been selected. To set the upper cutoff frequency, the required capacitor value for C2 is:
C2
+
1
2
p f
HIGH R4
+ 3.18 F
(5)
Using a 2.2-nF capacitor, the upper cutoff frequency is 724 Hz.
R5 and C3 also cause the signal response to roll off. Therefore, it is beneficial to design this roll-off point to begin
at the upper cutoff frequency. Assuming a value of 1 k
for R5, the value for C3 is calculated to be
0.22
F.
相关PDF资料 |
PDF描述 |
|---|---|
| TLV2772QPWRG4 | DUAL OP-AMP, 2700 uV OFFSET-MAX, 4.8 MHz BAND WIDTH, PDSO8 |
| TL032CPSRG4 | DUAL OP-AMP, 4500 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDSO8 |
| TLV2264AQDG4 | QUAD OP-AMP, 1500 uV OFFSET-MAX, 0.67 MHz BAND WIDTH, PDSO14 |
| TLV2264AQDRG4 | QUAD OP-AMP, 1500 uV OFFSET-MAX, 0.67 MHz BAND WIDTH, PDSO14 |
| TLV2264QDG4 | QUAD OP-AMP, 3000 uV OFFSET-MAX, 0.67 MHz BAND WIDTH, PDSO14 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV2772QPWR | 功能描述:运算放大器 - 运放 Dual 2.7 V High Slew Rate R To R Output RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| TLV2772QPWRG4 | 功能描述:运算放大器 - 运放 Dual 2.7V Hi-Slew Rate Rail to Rail RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| TLV2772QPWRG4Q1 | 功能描述:运算放大器 - 运放 Dual 2.7V Hi-Slew R to R Out Op Amp RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| TLV2772QPWRQ1 | 功能描述:运算放大器 - 运放 Auto Cat 2.7V Hi-Sle Rate Rail to Rail RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| TLV2773AID | 制造商:Rochester Electronics LLC 功能描述:DUAL OPAMP LOW POWER RAIL TO RAIL I/O - Bulk |
发布紧急采购，3分钟左右您将得到回复。