INA330:Thermistor Signal Amplifier for Temperature Control

The INA330 is a precision amplifier designed for thermoelectric cooler (TEC) control in optical networking applications. It is optimized for use in 10k 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 (RTHERM) and precision resistor (RSET), creating currents I1 and I2. The current conveyor circuit produces an output current, I0, equal to I1 – I2, which flows through the external gain-setting resistor. A buffered voltage output proportional to I0 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 industrial temperature range, –40°C to +85°C, with operation from –40°C to +125°C.

Features
  • OPTIMIZED FOR PRECISION 10k THERMISTOR APPLICATIONS
    • LOW OFFSET OVER TEMPERATURE:
         0.009°C Temperature Error, –40°C to +85°C
    • EXCELLENT LONG-TERM STABILITY
    • VERY LOW 1/f NOISE: (0.01Hz to 10Hz)
         (Peak-to-Peak Equivalent to 0.0001°C)
  • LOW OFFSET OVER TEMPERATURE:
       0.009°C Temperature Error, –40°C to +85°C
  • EXCELLENT LONG-TERM STABILITY
  • VERY LOW 1/f NOISE: (0.01Hz to 10Hz)
       (Peak-to-Peak Equivalent to 0.0001°C)
  • WIDE OUTPUT SWING: Within 10mV of Rails
  • SUPPLY RANGE: Single +2.7V to +5.5V
  • microPACKAGE: MSOP-10
  • REQUIRES ONLY ONE PRECISION RESISTOR
  • APPLICATIONS
    • THERMISTOR-BASED TEMPERATURE CONTROLLERS FOR OPTICAL NETWORKING
    • HIGH ACCURACY FOR TEC APPLICATIONS
    • LASER TEMPERATURE CONTROL
  • THERMISTOR-BASED TEMPERATURE CONTROLLERS FOR OPTICAL NETWORKING
  • HIGH ACCURACY FOR TEC APPLICATIONS
  • LASER TEMPERATURE CONTROL
Parametrics
keyINA330
Number of Channels (#)1
Vs (Min) (V)2.7
Vs (Max) (V)5.5
Iq (Typ) (mA)2.6
Bandwidth at Min Gain (Typ) (MHz)0.001
Gain (Min) (V/V)1
Gain (Max) (V/V)1
Gain Error (+/-) (Max) (%)0.2
RatingCatalog
Operating Temperature Range (C)-40 to 85
Package GroupVSSOP
Approx. Price (US$)2.20 | 1ku
Package Size: mm2:W x L (PKG)10VSSOP: 15 mm2: 4.9 x 3(VSSOP)
Datasheet?(1)
TitleTypeSize (KB)Date
INA330: Thermistor Signal Amplifier for Temperature ControlPDF87306 Nov 2002
Selection & solution guides?(1)
TitleTypeSize (KB)Date
Analog Signal Chain Guide (Rev. B)PDF600011 Jul 2013
Design kits & evaluation modules?(1)
NamePart#Type
DLP? NIRscan? Evaluation ModuleDLPNIRSCANEVMEvaluation Modules & Boards
Development tools?(2)
NamePart#Type
Calculate Input Common-Mode Range of Instrumentation AmplifiersINA-CMV-CALCCalculation Tools
SPICE-Based Analog Simulation ProgramTINA-TICircuit Design & Simulation
Ordering Information
Part #Preproduction / Production MaterialStatusTemp(oC)Price | QTYPackage | PinsDevice MarkingPackage QTY | Carrier
INA330AIDGSTProductionACTIVE-40 to 852.20 | 1kuVSSOP?(DGS)TLB250 | SMALL T&R
INA330AIDGSTG4ProductionACTIVE-40 to 852.20 | 1kuVSSOP?(DGS)TLB250 | SMALL T&R
INA330: Thermistor Signal Amplifier for Temperature Control INA330
所选封装材料的热学和电学性质 DCP010505B
模拟信号链路产品指南 (Rev. B) BQ24392
INA330
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