INA330 SIGNAL AMPLIFIER Datasheet

INA330 Datasheet, PDF, Equivalent


Part Number

INA330

Description

THERMISTOR SIGNAL AMPLIFIER

Manufacture

Burr-Brown Corporation

Total Page 19 Pages
Datasheet
Download INA330 Datasheet


INA330
INA330
INA330
SBOS260 – NOVEMBER 2002
THERMISTOR SIGNAL AMPLIFIER
FOR TEMPERATURE CONTROL
FEATURES
q OPTIMIZED FOR PRECISION 10k
THERMISTOR APPLICATIONS
q LOW OFFSET OVER TEMPERATURE:
0.009°C Temperature Error, –40°C to +85°C
q EXCELLENT LONG-TERM STABILITY
q VERY LOW 1/f NOISE: (0.01Hz to 10Hz)
(Peak-to-Peak Equivalent to 0.0001°C)
q WIDE OUTPUT SWING: Within 10mV of Rails
q SUPPLY RANGE: Single +2.7V to +5.5V
q microPACKAGE: MSOP-10
q REQUIRES ONLY ONE PRECISION RESISTOR
APPLICATIONS
q THERMISTOR-BASED TEMPERATURE
CONTROLLERS FOR OPTICAL NETWORKING
q HIGH ACCURACY FOR TEC APPLICATIONS
q LASER TEMPERATURE CONTROL
DESCRIPTION
The INA330 is a precision amplifier designed for thermoelec-
tric cooler (TEC) control in optical networking applications. It
is optimized for use in 10kthermistor-based temperature
controllers. The INA330 provides thermistor excitation and
generates an output voltage proportional to the difference in
resistances applied to the inputs. It uses only one precision
resistor plus the thermistor, thus providing an alternative to
the traditional bridge circuit. This new topology eliminates the
need for two precision resistors while maintaining excellent
accuracy for temperature control applications.
An excitation voltage is applied to the thermistor (RTHERM)
and precision resistor (RSET), creating currents I1 and I2. The
current conveyor circuit produces an output current, IO, equal
to I1 – I2, which flows through the external gain-setting
resistor. A buffered voltage output proportional to IO is also
provided.
The INA330 offers excellent long-term stability, and very low
1/f noise throughout the life of the product. The low offset
results in a 0.009°C temperature error from –40°C to +85°C.
It comes in MSOP-10 packaging and operates with supply
voltages from +2.7V to +5.5V. It is specified over the indus-
trial temperature range, –40°C to +85°C, with operation from
–40°C to +125°C.
VEXCITE
1V
V2 2
V1 3
V+
95
Enable High = On
Low = Off
6
8 VO
PID CONTROLLER
VREF
2.5V
I1
Thermistor
RTHERM = 10k
10
1
I2
RSET
10k
7 IO = I1 I2
4
CFILTER
500pF
RG
200k
VADJUST = +2.5V
D/A
Converter
INA330 In A Temperature Control Loop
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.
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, Texas Instruments Incorporated

INA330
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage .................................................................................. +5.5V
Signal Input Terminals:
(Pins 1, 2, 3, 6, and 10) Voltage(2) ......................... 0.5V to (V+) + 0.5V
Current(2) ............................................... ±10mA
Output Short-Circuit(3) .............................................................. Continuous
Operating Temperature Range ....................................... 40°C to +125°C
Storage Temperature Range .......................................... 65°C to +150°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
NOTES: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability. These are stress ratings only, and functional operation of the
device at these or any other conditions beyond those specified is not implied.
(2) Input terminals are diode clamped to the power-supply rails. Input signals that
can swing more than 0.5V beyond the supply rails should be current limited to
10mA or less. (3) Short-circuit to ground.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
PACKAGE/ORDERING INFORMATION
PRODUCT
INA330
"
PACKAGE-LEAD
MSOP-10
"
PACKAGE
DESIGNATOR(1)
DGS
"
SPECIFIED
TEMPERATURE
RANGE
40°C to +85°C
"
PACKAGE
MARKING
TLB
"
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
ORDERING
NUMBER
INA330AIDGST
INA330AIDGSR
TRANSPORT
MEDIA, QUANTITY
Tape and Reel, 250
Tape and Reel, 2500
PIN CONFIGURATION
Top View
MSOP
I2 (RSET) 1
V2 2
V1 3
GND 4
(Connect to V+) 5
INA330
10 I1 (RTHERM)
9 V+
8 VO
7 IO (RG)
6 Enable
2 INA330
www.ti.com
SBOS260


Features INA330 INA330 SBOS260 – NOVEMBER 2002 THERMISTOR SIGNAL AMPLIFIER FOR TEMPERA TURE CONTROL FEATURES q OPTIMIZED FOR PRECISION 10kΩ THERMISTOR APPLICATION S q LOW OFFSET OVER TEMPERATURE: 0.009 C Temperature Error, –40°C to +85° C q EXCELLENT LONG-TERM STABILITY q VER Y LOW 1/f NOISE: (0.01Hz to 10Hz) (Peak -to-Peak Equivalent to 0.0001°C) q WID E OUTPUT SWING: Within 10mV of Rails q SUPPLY RANGE: Single +2.7V to +5.5V q m icroPACKAGE: MSOP-10 q REQUIRES ONLY ON E PRECISION RESISTOR APPLICATIONS q THE RMISTOR-BASED TEMPERATURE CONTROLLERS F OR OPTICAL NETWORKING q HIGH ACCURACY F OR TEC APPLICATIONS q LASER TEMPERATURE CONTROL DESCRIPTION The INA330 is a p recision amplifier designed for thermoe lectric cooler (TEC) control in optical networking applications. It is optimiz ed for use in 10kΩ thermistor-based t emperature controllers. The INA330 prov ides thermistor excitation and generate s an output voltage proportional to the difference in resistances applied to the inputs. It uses only one precisio.
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