MODEL 140A
INLINE AMPLIFIER

Low Noise Inline Amplifier
User Selectable Gain Settings
Small Rugged Package
Includes Auto-Zero Function

The Model 140A is a remote in-line DC amplifier designed to be
used with bridge-type mV output transducers. The amplifierfeatures five user selectable gain settings with a gain accuracy of±0.5% and offers a wide bandwidth to 100kHz. The model 140A
offers a unique patented auto-zero function that allows theoperator to zero the transducer offset voltage to within ±1.5mV
either remotely or by pressing the on-board push button at theuser’s command, usually right before the taking of data. Thisfeature removes any offset drift from the sensor for a moreaccurate measurement.

APPLICATIONSFEATURES

 Static Acceleration Testing ±1.5mV Auto-Zero Function

 Pressure and Level Indication
 Instrumentation Labs

 Load Monitoring Strain Measurement

 Interface with mV Output Sensors
 x10, x25, x50, x100 & x200 Gain Settings
 Wide Bandwidth to 100kHz

5 to 30Vdc Excitation Voltage

US Patent No. 8.823,364 B2 applies

TE CONNECTIVITY SENSORS /// MODEL 140A INLINE AMPLIFIER

11/2018

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MODEL 140A
INLINE AMPLIFIERPERFORMANCE SPECIFICATIONS
All values are typical at ±24°C and 12Vdc excitation unless otherwise stated. TE reserves the right to update and changethese specifications without notice.
PARAMETERS
DYNAMIC
Input Type

Differential

Input Range (V)

0.5 to (Vexc – 0.6), each input referenced to ground

User Selectable Gain Settings

x10, x25, x50, x100, x200

Bandwidth (-3dB)

DC to 100kHz

Noise (µVrms/√Hz)

0.03 RTI + 2 RTO

Zero Output After Auto-Zero Actuation1±1.5mV, referenced to 2.5V reference out

Input Range Limit for Auto-Zero Function±10Volts/gain

ELECTRICAL
Excitation Voltage (Vdc)

5 to 30

Reverse Polarity Protection-20V, on excitation line

Quiescent Current (mA)

15

Reference Out (Vdc)

2.5 ±0.05, referenced to ground

Output Voltage Limit (Vpk)±2, referenced to 2.5V reference out

Gain Accuracy (%)

0.5

Output Impedance (Ω)<50Insulation Resistance (MΩ)>100 @ 50Vdc

ENVIRONMENTAL
Operating Temperature (°C)

-20 to +70

Storage Temperature (°C)

-20 to +70

Environmental Protection

IP50, Silicone Potted

Vibration (g)20 pk from 50Hz to 2000Hz

Shock (g)2000 pk with 3.6ms Haversine pulse

PHYSICAL
Case Material
Electrical Connector, Input
Electrical Connector, Output
Weight (grams)

Anodized Aluminum
Binder Connector P/N 09-0478-00-07(mates with Binder Connector P/N 99-0421-10-07)
Binder Connector P/N 09-0098-00-05(mates with Binder Connector P/N 99-0413-10-05)

34

1

Auto-zero can be actuated using pushbutton or grounding remote auto-zero pin for minimum 2 sec. Multiple actuations may be required to achieve the ±1.5mV limit.
Supply Out: 5.00 ±0.10 Vdc, <150 mamps current source, >5.2 Vdc excitation required.
3
Excitation and common ground are direct connections from instrumentation end to transducer end.
2

SUPPLIED ACCESSORIES
AC-G04393
1x Mating Connector Plug (Binder Connector P/N 99-0413-10-05)
AC-G05314
1x Mating Connector Plug (Binder Connector P/N 99-0421-10-07)
OPTIONAL ACCESSORIES
379-XXX
Cable Assembly, 5x #30 AWG, (XXX designates length in inches, 10ft standard)

TE CONNECTIVITY SENSORS /// MODEL 140A INLINE AMPLIFIER

11/2018

Page 2MODEL 140A
INLINE AMPLIFIERDIMENSIONSSCHEMATICORDERING INFORMATIONPart Number
140A

TE.com/sensor solutions
Measurement Specialties, Inc., a TE Connectivity company.
Measurement Specialties, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein
might be trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes
no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard
Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuseof the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application.
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All Rights Reserved.

TE CONNECTIVITY SENSORS /// MODEL 140A INLINE AMPLIFIER

11/2018

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