IC OPAMP CHOP R-R 350KHZ 8MSOP

OPA2333AIDGKTG4

Manufacturer Part NumberOPA2333AIDGKTG4
DescriptionIC OPAMP CHOP R-R 350KHZ 8MSOP
ManufacturerTexas Instruments
OPA2333AIDGKTG4 datasheet
 


Specifications of OPA2333AIDGKTG4

Amplifier TypeChopper (Zero-Drift)Number Of Circuits2
Output TypeRail-to-RailSlew Rate0.16 V/µs
Gain Bandwidth Product350kHzCurrent - Input Bias70pA
Voltage - Input Offset2µVCurrent - Supply17µA
Current - Output / Channel5mAVoltage - Supply, Single/dual (±)1.8 V ~ 5.5 V, ±0.9 V ~ 2.75 V
Operating Temperature-40°C ~ 125°CMounting TypeSurface Mount
Package / Case8-MSOP, Micro8™, 8-uMAX, 8-uSOP,Number Of Channels2
Voltage Gain Db130 dBCommon Mode Rejection Ratio (min)106 dB
Input Offset Voltage0.01 mVOperating Supply Voltage3 V, 5 V
Maximum Operating Temperature+ 125 CMounting StyleSMD/SMT
Maximum Dual Supply Voltage+/- 2.75 VMinimum Operating Temperature- 40 C
Lead Free Status / RoHS StatusLead free / RoHS Compliant-3db Bandwidth-
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ACHIEVING OUTPUT SWING TO THE OP
AMP NEGATIVE RAIL
Some applications require output voltage swings
from 0V to a positive full-scale voltage (such as
+2.5V)
with
excellent
accuracy.
single-supply op amps, problems arise when the
output signal approaches 0V, near the lower output
swing limit of a single-supply op amp. A good
single-supply
op
amp
may
single-supply ground, but will not reach ground. The
output of the OPA333 and OPA2333 can be made to
swing to ground, or slightly below, on a single-supply
power source. To do so requires the use of another
resistor and an additional, more negative, power
supply than the op amp negative supply. A pull-down
resistor may be connected between the output and
the additional negative supply to pull the output down
below the value that the output would otherwise
achieve, as shown in
Figure
19.
V+ = +5V
OPA333
V
IN
R = 20kW
Op Amp V = GND
-
-5V
Additional
Negative
Supply
Figure 19. For V
Range to Ground
OUT
The OPA333 and OPA2333 have an output stage
that allows the output voltage to be pulled to its
negative supply rail, or slightly below, using the
technique previously described. This technique only
+5V
+
0.1 F
m
- -
+ +
K-Type
Thermocouple
40.7 V/ C
m °
works with some types of output stages. The
OPA333 and OPA2333 have been characterized to
perform with this technique; the recommended
resistor value is approximately 20k . Note that this
configuration will increase the current consumption
With
most
by several hundreds of microamps. Accuracy is
excellent down to 0V and as low as –2mV. Limiting
and nonlinearity occurs below –2mV, but excellent
accuracy returns as the output is again driven above
swing
close
to
–2mV. Lowering the resistance of the pull-down
resistor will allow the op amp to swing even further
below the negative rail. Resistances as low as 10k
can be used to achieve excellent accuracy down to
–10mV.
GENERAL LAYOUT GUIDELINES
Attention to good layout practices
recommended.
possible, use a printed circuit board (PCB) ground
plane with surface-mount components placed as
close to the device pins as possible. Place a 0.1μF
capacitor closely across the supply pins. These
guidelines should be applied throughout the analog
circuit to improve performance and provide benefits
V
OUT
such
(electromagnetic-interference) susceptibility.
P
Operational amplifiers vary in their susceptibility to
radio frequency interference (RFI). RFI can generally
be identified as a variation in offset voltage or dc
signal levels with changes in the interfering RF
signal. The OPA333 has been specifically designed
to minimize susceptibility to RFI and demonstrates
remarkably low sensitivity compared to previous
generation devices. Strong RF fields may still cause
varying offset levels.
4.096V
REF3140
R
1
6.04kW
R
5
31.6kW
D1
R
R
2
2
2.94kW
549W
R
6
200W
R
R
Zero Adj.
4
3
6.04kW
60.4W
Figure 20. Temperature Measurement
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OPA333
OPA2333
SBOS351C – MARCH 2006 – REVISED MAY 2007
is always
Keep
traces
short
and,
as
reducing
the
R
9
150kW
+5V
0.1 F
m
V
OPA333
O
when
EMI
9