IC OPAMP GP R-R 5.1MHZ 16SOIC

 

TLV2775CDR

Manufacturer Part NumberTLV2775CDR
DescriptionIC OPAMP GP R-R 5.1MHZ 16SOIC
ManufacturerTexas Instruments
TLV2775CDR datasheets

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Specifications of TLV2775CDR

Amplifier TypeGeneral PurposeNumber Of Circuits4
Output TypeRail-to-RailSlew Rate10.5 V/µs
Gain Bandwidth Product5.1MHzCurrent - Input Bias2pA
Voltage - Input Offset700µVCurrent - Supply1mA
Current - Output / Channel50mAVoltage - Supply, Single/dual (±)2.5 V ~ 5.5 V, ±1.25 V ~ 2.75 V
Operating Temperature0°C ~ 70°CMounting TypeSurface Mount
Package / Case16-SOIC (3.9mm Width)Lead Free Status / RoHS StatusLead free / RoHS Compliant
-3db Bandwidth-Other names296-1908-2
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Page 36/75

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SLOS209G − JANUARY 1998 − REVISED FEBRUARY 2004
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.
3 V
1 Axis ACH04−08−05
R1
100 k
Shock Sensor
1.23 V
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.
36
APPLICATION INFORMATION
C2
1.23 V
R3
2.2 nF
10 k
R4
100 k
R2
1 M
3 V
C1
8
2
+
0.22 F
1
3
_
1/2
4
TLV2772
Signal Conditioning
1.23 V
WWW.TI.COM
R5
1 k
Output to
TLV1544 (ADC)
C3
0.22 F
3 V
R6
2.2 k
C
TLV431
R
A
Voltage Reference

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