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OPA2364IDGKR Datasheet(PDF) 10 Page - Texas Instruments

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Part # OPA2364IDGKR
Description  1.8V, 7MHz, 90dB CMRR, SINGLE-SUPPLY, RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

OPA2364IDGKR Datasheet(HTML) 10 Page - Texas Instruments

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OPA363, 2363, 364, 2364, 4364
SBOS259B
10
www.ti.com
FIGURE 7. The OPA363 and OPA364 Directly Drive the
ADS8324.
FIGURE 9. OPA2363 Configured as Half of a Dual Stereo Headphone Driver.
FIGURE 8. Driving the 12-Bit A/D Converter on the MSP430.
BUFFERED REFERENCE VOLTAGE
Many single-supply applications require a mid-supply refer-
ence voltage. The OPA363 and OPA364 offer excellent
capacitive load drive capability, and can be configured to
provide a 0.9V reference voltage, as can be seen in Figure 6.
For appropriate loading considerations, see the “Capacitive
Load” section.
AUDIO APPLICATIONS
The OPA363 and OPA364 op amp family has linear offset
voltage over the entire input common-mode range. Com-
bined with low-noise, this feature makes the OPA363 and
OPA364 suitable for audio applications. Single supply 1.8V
operation allows the OPA2363 and OPA2364 to be optimal
candidates for dual stereo-headphone drivers and micro-
phone pre-amplifiers in portable stereo equipment, see Fig-
ures 9 and 10.
FIGURE 6. The OPA363 and OPA364 Provide a Stable
Reference Voltage.
V+
R
1
10k
R
2
10k
0.9V
OPAx363
OPAx364
V+
C
L = 1µF
ADS8324
V+ = 1.8V
V+ = 1.8V
OPA363
OPA364
V
IN
100
1nF
MSP430
V+
V+
V
IN
100
1nF
OPA363
OPA364
V+
V–
20k
1/2
OPA2363
One of Right or Left Channel
One of Right or Left
Headphone Out
10k
20k
V+
V–
Internally
Biased
20k
1/2
TPS6100
20k
10k
1
µF
47pF
V–
DIRECTLY DRIVING THE ADS8324 AND
THE MSP430
The OPA363 and OPA364 series op amps are optimized for
driving medium speed (up to 100kHz) sampling A/D convert-
ers. However, they also offer excellent performance for
higher speed converters. The no crossover input stage of the
OPA363 and OPA364 directly drive A/D converters without
degradation of differential linearity and THD. They provide an
effective means of buffering the A/D converters input capaci-
tance and resulting charge injection while providing signal
gain. Figure 7 and Figure 8 show the OPA363 and OPA364
configured to drive the ADS8324 and the 12-bit
A/D converter on the MSP430.


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