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| 型號： | TLV2775AIPWRG4 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FAMILY OF 2.7-HIGH-SLEW-RATE RAIL-TO-RAIL OUTPUT OPERATIONAL AMPLIFIERS WITH SHUTDOWN |
| 中文描述： | 2.7家庭，高擺率軌到軌輸出運算放大器具有關(guān)斷 |
| 文件頁數(shù)： | 36/65頁 |
| 文件大小： | 1483K |
| 代理商： | TLV2775AIPWRG4 |
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SLOS209G JANUARY 1998 REVISED FEBRUARY 2004
36
WWW.TI.COM
APPLICATION INFORMATION
using the TLV2772 as an accelerometer interface
The schematic, shown in Figure 62, shows the ACH04-08-05 interfaced to the TLV1544 10-bit analog-to-digital
converter (ADC).
The ACH04-08-05 is a shock sensor designed to convert mechanical acceleration into electrical signals. The
sensor contains three piezoelectric sensing elements oriented to simultaneously measure acceleration in three
orthogonal, linear axes (x, y, z). The operating frequency is 0.5 Hz to 5 kHz. The output is buffered with an
internal JFET and has a typical output voltage of 1.80 mV/g for the x and y axis and 1.35 mV/g for the z axis.
Amplification and frequency shaping of the shock sensor output is done by the TLV2772 rail-to-rail operational
amplifier. The TLV2772 is ideal for this application as it offers high input impedance, good slew rate, and
excellent dc precision. The rail-to-rail output swing and high output drive are perfect for driving the analog input
of the TLV1544 ADC.
_
+
1 Axis ACH040805
Shock Sensor
3 V
1.23 V
R1
100 k
C1
0.22
μ
F
R2
1 M
R3
10 k
1.23 V
C2
2.2 nF
R4
100 k
3 V
R5
1 k
C3
0.22
μ
F
1/2
TLV2772
Signal Conditioning
Output to
TLV1544 (ADC)
R6
2.2 k
1.23 V
3 V
TLV431
C
R
A
4
8
1
2
3
Voltage Reference
Figure 62. Accelerometer Interface Schematic
The sensor signal must be amplified and frequency-shaped to provide a signal the ADC can properly convert
into the digital domain. Figure 62 shows the topology used in this application for one axis of the sensor. This
system is powered from a single 3-V supply. Configuring the TLV431 with a 2.2-k
resistor produces a reference
voltage of 1.23 V. This voltage is used to bias the operational amplifier and the internal JFETs in the shock
sensor.
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| TLV2775CDG4 | 功能描述:運算放大器 - 運放 Quad 2.7V 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 |
| TLV2775CDR | 功能描述:IC OPAMP GP R-R 5.1MHZ 16SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品變化通告:Discontinuation 18/May/2012 標準包裝:2,000 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.42 V/µs 增益帶寬積:1.5MHz -3db帶寬:- 電流 - 輸入偏壓:15nA 電壓 - 輸入偏移:1000µV 電流 - 電源:116µA 電流 - 輸出 / 通道:100mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5 V，±0.9 V ~ 2.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 產(chǎn)品目錄頁面:851 (CN2011-ZH PDF) 其它名稱:296-20930-2 |
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