OPA363

Manufacturer Part NumberOPA363
ManufacturerTexas Instruments
OPA363 datasheet
 


Specifications of OPA363

Number Of Channels1Total Supply Voltage(min)(+5v=5, +/-5v=10)1.8
Total Supply Voltage(max)(+5v=5, +/-5v=10)5.5Iq Per Channel(max)(ma)0.75
Gbw(typ)(mhz)7Slew Rate(typ)(v/us)5
Vio (25c)(max)(mv)0.5Offset Drift(typ)(uv/c)3
Vn At 1khz(typ)(nv/rthz)17Iib(max)(pa)10
Cmrr(min)(db)74Rail-railIn/Out
Operating Temperature Range(c)-40 to 125Pin/package6SOT-23, 8SOIC
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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.
V+
V+
R
1
10k
OPAx363
OPAx364
0.9V
R
2
10k
FIGURE 6. The OPA363 and OPA364 Provide a Stable
Reference Voltage.
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.
One of Right or Left Channel
FIGURE 9. OPA2363 Configured as Half of a Dual Stereo Headphone Driver.
10
V
IN
FIGURE 7. The OPA363 and OPA364 Directly Drive the
C
= 1 F
L
V
IN
FIGURE 8. Driving the 12-Bit A/D Converter on the MSP430.
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.
20k
V+
1 F
20k
20k
1/2
OPA2363
10k
V–
47pF
V–
10k
www.ti.com
V+ = 1.8V
V+ = 1.8V
100
OPA363
ADS8324
OPA364
1nF
ADS8324.
V+
100
OPA363
MSP430
OPA364
1nF
20k
One of Right or Left
V+
Headphone Out
1/2
TPS6100
Internally
Biased
V–
OPA363, 2363, 364, 2364, 4364
SBOS259B
V+