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INA330AIDGST Datasheet

  • INA330AIDGST

  • THERMISTOR SIGNAL AMPLIFIER FOR TEMPERATURE CONTROL

  • 244.65KB

  • 14頁(yè)

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INA330
INA3
30
SBOS260 鈥?NOVEMBER 2002
THERMISTOR SIGNAL AMPLIFIER
FOR TEMPERATURE CONTROL
FEATURES
q
OPTIMIZED FOR PRECISION 10k
鈩?/div>
THERMISTOR APPLICATIONS
q
LOW OFFSET OVER TEMPERATURE:
0.009
擄
C Temperature Error, 鈥?0
擄
C to +85
擄
C
q
q
DESCRIPTION
The INA330 is a precision amplifier designed for thermoelec-
tric cooler (TEC) control in optical networking applications. It
is optimized for use in 10k鈩?thermistor-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 (R
THERM
)
and precision resistor (R
SET
), creating currents I
1
and I
2
. The
current conveyor circuit produces an output current, I
O
, equal
to I
1
鈥?I
2
, which flows through the external gain-setting
resistor. A buffered voltage output proportional to I
O
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擄C temperature error from 鈥?0擄C to +85擄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, 鈥?0擄C to +85擄C, with operation from
鈥?0擄C to +125擄C.
Enable High = On
Low = Off
PID CONTROLLER
9
V
EXCITE
1V
V
2
V
1
2
3
5
6
V
O
EXCELLENT LONG-TERM STABILITY
VERY LOW 1/f NOISE: (0.01Hz to 10Hz)
(Peak-to-Peak Equivalent to 0.0001
擄
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
V+
8
V
REF
2.5V
10
I
1
1
4
C
FILTER
500pF
7
I
O
= I
1
鈥?I
2
I
2
Thermistor
R
THERM
= 10k鈩?/div>
R
SET
10k鈩?/div>
R
G
200k鈩?/div>
D/A
Converter
V
ADJUST
= +2.5V
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.
Copyright 漏 2002, Texas Instruments Incorporated
www.ti.com

INA330AIDGST 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

  • -

  • 通用

  • 1

  • 滿(mǎn)擺幅

  • -

  • -

  • 1kHz

  • 200pA

  • 60µV

  • 2.6mA

  • 25mA

  • 2.7 V ~ 5.5 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）

  • 10-MSOP

  • Digi-Reel®

  • 296-13861-6

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