Differential Amplifiers

What is a Differential Amplifier?
A differential amplifier is a type of electronic amplifier that increases the difference between 2 input voltages. Differential amplifiers also suppress and voltage common to the two inputs. A digital amplifier is one on the most used and important components within integrated circuits.

Differential Amplifier 2 inputs
• One inverting
• One non-inverting

Why use a Differential Amplifier?
Differential amplifiers are used to amplify balanced differential signals which are used to communicate small signals in electrically noisy environments. The signal wires should be close or wired together and most of the induced noise with be “common mode”, affecting both wires in the same way.

Differential Amplifier Applications.
The main application of a differential amplifier is to get rid of any noise and voltages that are present in both of the voltage inputs. This noise is present in common mode fluctuating voltage. Differential amplifiers are used in circuits that utilise negative feedback, controlling motors and signal amplification.

Various electronic devices use differential amplifiers.
• FM/Am Radio signal recovery
• Audio pre-amplifiers
• Microphone pre-amplifiers
• TV Signal recovery
• Digital to analogue converters

A Differential amplifier can be configured to operate as single ended amplifier by grounding one of the inputs.
Modern differential amplifiers normally sit on a single microchip. Inside the microchip, positive and negative signals are added and become a single output.

What is CMRR and PSRR?
CMRR – Common mode rejection ratio
PSSR – Power supply rejection ratio

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Beskrivning Pris 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 Output Configuration Number of Channels per Chip Mounting Type Package Type Pin Count Rail to Rail
RS-artikelnummer 923-2271
Tillv. art.nrINA105KU
VarumärkeTexas Instruments
63,981 kr
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Dual - ±15V 0.5mV 0.05MΩ 0dB - 72dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 288-733
Tillv. art.nrINA105KU
VarumärkeTexas Instruments
75,07 kr
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Dual - ±15V 0.5mV 0.05MΩ 0dB - 72dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 100-3830
Tillv. art.nrINA146UA
VarumärkeTexas Instruments
44,476 kr
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Dual, Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V ±12 V, ±15 V, ±3 V, ±5 V, ±9 V 10mV 0.11MΩ 40dB - 70dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 378-2783
Tillv. art.nrINA146UA
VarumärkeTexas Instruments
48,80 kr
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Dual, Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V ±12 V, ±15 V, ±3 V, ±5 V, ±9 V 10mV 0.11MΩ 40dB - 70dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 661-2551
Tillv. art.nrTL592B-8D
VarumärkeTexas Instruments
14,89 kr
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Dual - ±6V - 0.004MΩ - - 60dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 162-5551
Tillv. art.nrTL592B-8D
VarumärkeTexas Instruments
12,764 kr
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Dual - ±6V - 0.004MΩ - - 60dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 218-8382
Tillv. art.nrINA117KU
VarumärkeTexas Instruments
74,97 kr
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Dual - ±15V 2mV 0.8MΩ 0dB - 66dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 914-2982
Tillv. art.nrLMH3401IRMST
VarumärkeTexas Instruments
106,31 kr
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Single 5 V - - 29(Differential) Ω, 55 (Single) Ω 16dB 4 (Small Signal) GHz, 7 (Large Signal) GHz - - 1 Surface Mount UQFN 14 -
RS-artikelnummer 162-5521
Tillv. art.nrTHS4141ID
VarumärkeTexas Instruments
76,589 kr
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Dual, Single 5 V ±15V 7mV 14.4MΩ 67dB - 75dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 100-3838
Tillv. art.nrINA148UA
VarumärkeTexas Instruments
47,195 kr
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Dual, Single 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V ±12 V, ±15 V, ±3 V, ±5 V, ±9 V 5mV 2MΩ 0dB - 70dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 162-5517
Tillv. art.nrTHS4130CD
VarumärkeTexas Instruments
63,355 kr
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Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 814-4013
Tillv. art.nrTHS4531AID
VarumärkeTexas Instruments
27,504 kr
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Single 2.5 → 5.5 V - ±2000µV - 113dB 27MHz 90dB - 1 Surface Mount SOIC 8 Rail to Rail Output
RS-artikelnummer 162-5020
Tillv. art.nrINA143U
VarumärkeTexas Instruments
30,987 kr
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Dual, Single 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V ±15V 0.5mV 0.055MΩ 20dB - 86dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 178-9225
Tillv. art.nrLM9044V/NOPB
VarumärkeTexas Instruments
35,277 kr
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Single 3 V - - 4MΩ 4.64V/V 909Hz 50dB - 1 Surface Mount PLCC 20 -
RS-artikelnummer 162-8618
Tillv. art.nrLMP8350MA/NOPB
VarumärkeTexas Instruments
46,14 kr
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Single 4.5 → 12 V - ±2.52mV 0.48MΩ 130dB 118MHz - - 1 Surface Mount SOIC 8 No
RS-artikelnummer 814-4004
Tillv. art.nrTHS4524IDBT
VarumärkeTexas Instruments
76,10 kr
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Dual, Single 2.5 → 5.5 V ±1.25 → ±2.75V ±2mV 110kΩ 116dB 93MHz 80dB - 1 Surface Mount TSSOP 38 Rail to Rail Output
RS-artikelnummer 661-2514
Tillv. art.nrTHS4130CD
VarumärkeTexas Instruments
75,48 kr
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Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 162-5026
Tillv. art.nrINA157U
VarumärkeTexas Instruments
35,133 kr
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Dual - ±15V 0.5mV 0.024MΩ 6.02dB - 86dB - 1 Surface Mount SOIC 8 -
RS-artikelnummer 162-5519
Tillv. art.nrTHS4131CDGK
VarumärkeTexas Instruments
62,535 kr
Each (In a Tube of 80)
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Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount MSOP 8 -
RS-artikelnummer 921-2924
Tillv. art.nrTHS4524IDBT
VarumärkeTexas Instruments
63,423 kr
Each (In a Tube of 50)
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Dual, Single 2.5 → 5.5 V ±1.25 → ±2.75V ±2mV 110kΩ 116dB 93MHz 80dB - 1 Surface Mount TSSOP 38 Rail to Rail Output