Differential Line Drivers

Differential line drivers are electrical devices that convey analogue signals, audio or otherwise, across distances with minimal noise pick up.

How do differential line drivers work?

Information in differential line drivers is transmitted using two complementary signals. They send the same electrical signal as two different signals, each on a conductor of its own.The conductors can either be traces on a circuit board or wires that are twisted together.

The voltage between the two signals and not the difference between a single wire and earth (a common return path for electric current), prompts a response by the receiving circuit. Differential line drivers resist electromagnetic noise once the difference between wires has been detected by the receiving circuit.

What are differential line drivers used for?

Differential line drivers are utilised in balanced audio circuitry and digital signalling. They are used to reduce electromagnetic noise in applications such as portable and mobile devices where reducing the supply voltage results in reduced noise immunity, and in computers to reduce electromagnetic interference.

They can be built preferably around differential amplifiers fitted with high-speed, high-output current buffers inside the feedback loop.


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Description Price Power Supply Type Typical Single Supply Voltage Typical Dual Supply Voltage Maximum Input Offset Voltage Maximum Input Resistance Maximum Voltage Gain Typical Gain Bandwidth Product Minimum CMRR Number of Channels per Chip Mounting Type Package Type Pin Count Rail to Rail Maximum Supply Current
RS Stock No. 106-7064
Mfr. Part No.SSM2142PZ
$11.844
Each (In a Tube of 50)
units
Dual - ±13 → ± 18V - 0.01MΩ 5.98dB - - 1 Through Hole PDIP 8 - 5.5 mA
RS Stock No. 108-410
Mfr. Part No.AD8131ARZ
$8.01
Each
units
Dual, Single 3 V, 5 V, 9 V ±3 V, ±5 V 12mV 0.002MΩ 6.19dB - 70dB 1 Surface Mount SOIC 8 No -
RS Stock No. 162-6404
Mfr. Part No.SN75113NE4
$4.526
Each (In a Tube of 25)
units
Single 5 V - - - - - - - Through Hole PDIP 16 - 85 mA
RS Stock No. 121-9133
Mfr. Part No.DRV134UA
$8.736
Each (In a Tube of 40)
units
Dual - ±18V - 0.01MΩ 6dB - 46dB 1 Surface Mount SOIC 16 - -
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