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OPA2334 데이터시트 PDF




Burr-Brown에서 제조한 전자 부품 OPA2334은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 OPA2334 자료 제공

부품번호 OPA2334 기능
기능 0.05UV/C max / SINGLE-SUPPLY CMOS OPERATIONAL AMPLIFIERS
제조업체 Burr-Brown
로고 Burr-Brown 로고


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OPA2334 데이터시트, 핀배열, 회로
OPA335
OPA2335
OPA2334
OPA2335
OPA334
OPA2334
OPA335
OPA2335
SBOS245D – JUNE 2002 – REVISED JULY 2003
0.05µV/°C max, SINGLE-SUPPLY
CMOS OPERATIONAL AMPLIFIERS
Zerø-Drift Series
FEATURES
q LOW OFFSET VOLTAGE: 5µV (max)
q ZERO DRIFT: 0.05µV/°C (max)
q QUIESCENT CURRENT: 285µA
q SINGLE-SUPPLY OPERATION
q SINGLE AND DUAL VERSIONS
q SHUTDOWN
q MicroSIZE PACKAGES
APPLICATIONS
q TRANSDUCER APPLICATIONS
q TEMPERATURE MEASUREMENT
q ELECTRONIC SCALES
q MEDICAL INSTRUMENTATION
q BATTERY-POWERED INSTRUMENTS
q HANDHELD TEST EQUIPMENT
DESCRIPTION
The OPA334 and OPA335 series of CMOS operational
amplifiers use auto-zeroing techniques to simultaneously
provide very low offset voltage (5µV max), and near-zero drift
over time and temperature. These miniature, high-precision,
low quiescent current amplifiers offer high input impedance
and rail-to-rail output swing. Single or dual supplies as low as
+2.7V (±1.35V) and up to +5.5V (±2.75V) may be used.
These op amps are optimized for low-voltage, single-supply
operation.
The OPA334 family includes a shutdown mode. Under logic
control, the amplifiers can be switched from normal operation
to a standby current of 2µA. When the Enable pin is con-
nected high, the amplifier is active. Connecting Enable low
disables the amplifier, and places the output in a high-
impedance state.
The OPA334 (single version with shutdown) comes in
MicroSIZE SOT23-6. The OPA335 (single version without
shutdown) is available in SOT23-5, and SO-8. The OPA2334
(dual version with shutdown) comes in MicroSIZE MSOP-10.
The OPA2335 (dual version without shutdown) is offered in
the MSOP-8 and SO-8 packages. All versions are specified
for operation from –40°C to +125°C.
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION
Absolute Value;
Centered Around Zero
Offset Voltage (µV)
Offset Voltage Drift (µV/°C)
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2002-2003, Texas Instruments Incorporated




OPA2334 pdf, 반도체, 판매, 대치품
TYPICAL CHARACTERISTICS
At TA = +25°C, VS = +5V, RL = 10kconnected to VS /2, and VOUT = VS /2, unless otherwise noted.
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION
Absolute Value;
Centered Around Zero
Offset Voltage (µV)
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
(V+)
5.5V
2.7V
(V+) 1
+125°C
+25°C
40°C
(V) + 1
+25°C
+125°C
40°C
(V)
0
2 46
Output Current (mA)
8
10
1000
INPUT BIAS CURRENT vs TEMPERATURE
100
10
40 20
0
20 40 60 80
Temperature (°C)
100 120
Offset Voltage Drift (µV/°C)
1200
1000
INPUT BIAS CURRENT vs COMMON-MODE VOLTAGE
+125°C
800
600
400
40°C
200
+25°C
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Common-Mode Voltage (V)
QUIESCENT CURRENT (per channel)
vs TEMPERATURE
400
350
VS = +5.5V
300
250
200
VS = +2.7V
150
100
50
0
40 20
0
20 40 60 80
Temperature (°C)
100 120
4 OPA334, OPA2334, OPA335, OPA2335
www.ti.com
SBOS245D

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OPA2334 전자부품, 판매, 대치품
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VS = +5V, RL = 10kconnected to VS /2, and VOUT = VS /2, unless otherwise noted.
SETTLING TIME vs CLOSED-LOOP GAIN
100
Unity-gain
requires one
complete Auto-Zero
Cyclesee text.
0.01%
10
0.1%
1
1 10 100
Gain (V/V)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.5
2.7
COMMON-MODE RANGE vs SUPPLY VOLTAGE
Maximum Common-Mode
Minimum Common-Mode
3.2 3.7 4.2 4.7 5.2
Supply Voltage (V)
5.5
APPLICATIONS INFORMATION
The OPA334 and OPA335 series op amps are unity-gain
stable and free from unexpected output phase reversal. They
use auto-zeroing techniques to provide low offset voltage
and very low drift over time and temperature.
Good layout practice mandates use of a 0.1µF capacitor
placed closely across the supply pins.
For lowest offset voltage and precision performance, circuit
layout and mechanical conditions should be optimized. Avoid
temperature gradients that create thermoelectric (Seebeck)
effects in thermocouple junctions formed from connecting
dissimilar conductors. These thermally-generated potentials
can be made to cancel by assuring that they are equal on
both input terminals.
Use low thermoelectric-coefficient connections (avoid dis-
similar metals).
Thermally isolate components from power supplies or
other heat-sources.
Shield op amp and input circuitry from air currents, such as
cooling fans.
Following these guidelines will reduce the likelihood of junc-
tions being at different temperatures, which can cause ther-
moelectric voltages of 0.1µV/°C or higher, depending on
materials used.
OPERATING VOLTAGE
The OPA334 and OPA335 series op amps operate over a
power-supply range of +2.7V to +5.5V (±1.35V to ±2.75V).
Supply voltages higher than 7V (absolute maximum) can
permanently damage the amplifier. Parameters that vary
over supply voltage or temperature are shown in the Typical
Characteristics section of this data sheet.
OPA334 ENABLE FUNCTION
The enable/shutdown digital input is referenced to the V
supply voltage of the amp. A logic high enables the op amp. A
valid logic high is defined as > 75% of the total supply voltage.
The valid logic high signal can be up to 5.5V above the negative
supply, independent of the positive supply voltage. A valid
logic low is defined as < 0.8V above the Vsupply pin. If dual
or split power supplies are used, be sure that logic input signals
are properly referred to the negative supply voltage. The
Enable pin must be connected to a valid high or low voltage, or
driven, not left open circuit.
The logic input is a high-impedance CMOS input, with sepa-
rate logic inputs provided on the dual version. For battery-
operated applications, this feature can be used to greatly
reduce the average current and extend battery life.
The enable time is 150µs, which includes one full auto-zero
cycle required by the amplifier to return to VOS accuracy.
Prior to this time, the amplifier functions properly, but with
unspecified offset voltage.
Disable time is 1µs. When disabled, the output assumes a
high-impedance state. This allows the OPA334 to be oper-
ated as a gated amplifier, or to have the output multiplexed
onto a common analog output bus.
INPUT VOLTAGE
The input common-mode range extends from (V) 0.1V to
(V+) 1.5V. For normal operation, the inputs must be limited
to this range. The common-mode rejection ratio is only valid
within the valid input common-mode range. A lower supply
voltage results in lower input common-mode range; there-
fore, attention to these values must be given when selecting
the input bias voltage. For example, when operating on a
single 3V power supply, common-mode range is from 0.1V
below ground to half the power-supply voltage.
OPA334, OPA2334, OPA335, OPA2335
SBOS245D
www.ti.com
7

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