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-invertingWhy 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 convertersA 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 ratioPSSR – Power supply rejection ratio

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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 Output Configuration Number of Channels per Chip Mounting Type Package Type Pin Count Rail to Rail
RS Stock No. 160-2828
Mfr. Part No.AD8350ARMZ15
£3.854
Each (In a Tube of 50)
Units
Single 11 V - ±1mV 200Ω 16dB 1.1GHz -67dB - 1 Surface Mount MSOP 8 -
RS Stock No. 697-7221
Mfr. Part No.AD8138AARMZ
£4.73
Each
Units
Dual - ±5V 2.5mV 6MΩ 1.0045V/V 320MHz - - 1 - - - -
RS Stock No. 145-3380
Mfr. Part No.MC10H116FNG
£3.017
Each (In a Tube of 46)
Units
Single -5.2 V - - - - - - - 1 Surface Mount PLCC 20 -
New
RS Stock No. 197-7167
Mfr. Part No.INA149AID
£5.20
Each (In a Pack of 2)
Units
Dual, Single - ±2 to ±18V 1100µV - - 500kHz - - 1 - SOIC 8 -
RS Stock No. 162-5292
Mfr. Part No.THS4131IDGN
£5.683
Each (In a Tube of 80)
Units
Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount MSOP 8 -
RS Stock No. 653-1336
Mfr. Part No.THS4131IDGN
£6.72
Each
Units
Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount MSOP 8 -
RS Stock No. 806-7931
Mfr. Part No.AD8271BRMZ
£3.725
Each (In a Pack of 2)
Units
Dual - ±2.5 → ±18V 1000µV 1GΩ - 20MHz 80dB - 1 Surface Mount MSOP 10 Rail to Rail Input
RS Stock No. 462-0721
Mfr. Part No.THS4130IDGN
£7.00
Each
Units
Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount MSOP 8 -
RS Stock No. 183-1764
Mfr. Part No.AD8475BRMZ
£3.89
Each (In a Tube of 50)
Units
Dual, Single 3 → 10 V ±1.5 to ±5V - 1.75kΩ - 150MHz 86dB Differential 1 Surface Mount MSOP 10 Rail to Rail Input/Output
RS Stock No. 183-1989
Mfr. Part No.AD8475BRMZ
£4.975
Each (In a Pack of 2)
Units
Dual, Single 3 → 10 V ±1.5 to ±5V - 1.75kΩ - 150MHz 86dB Differential 1 Surface Mount MSOP 10 Rail to Rail Input/Output
RS Stock No. 153-3196
Mfr. Part No.AD8390AACPZ-R7
£1.235
Each (In a Pack of 2)
Units
Dual, Single - - +3V - - 45MHz 58dB Differential 2 Surface Mount LFCSP 16 No
RS Stock No. 661-2527
Mfr. Part No.THS4141CD
£7.62
Each
Units
Dual, Single 5 V ±15V 7mV 14.4MΩ 67dB - 75dB - 1 Surface Mount SOIC 8 -
RS Stock No. 100-3878
Mfr. Part No.THS4130IDGN
£5.856
Each (In a Tube of 80)
Units
Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount MSOP 8 -
RS Stock No. 806-7950
Mfr. Part No.AD8278BRZ
£2.905
Each (In a Pack of 2)
Units
Dual, Single 2 → 36 V ±2 → ±18V 500µV 120kΩ - 1MHz 74dB - 1 Surface Mount SOIC 8 -
New
RS Stock No. 197-7140
Mfr. Part No.INA117KU
£5.321
Each (In a Tube of 75)
Units
Dual 12 V ±15V 1000µV - - 200kHz - - 1 - SOIC 8 -
RS Stock No. 858-0683
Mfr. Part No.LT1990IS8#PBF
£3.156
Each (In a Pack of 5)
Units
Single 2.7 36 V - 6.7mV 2MΩ - 105kHz 57dB - 1 Surface Mount SOIC 8 Rail to Rail Output
New
RS Stock No. 193-5524
Mfr. Part No.MCP6D11-E/MS
BrandMicrochip
£1.22
Each (In a Pack of 5)
Units
Single 2.5 V - - - - - - - - SMD - - -
RS Stock No. 162-5520
Mfr. Part No.THS4141CD
£6.377
Each (In a Tube of 75)
Units
Dual, Single 5 V ±15V 7mV 14.4MΩ 67dB - 75dB - 1 Surface Mount SOIC 8 -
RS Stock No. 145-7195
Mfr. Part No.AD8271ARMZ
£1.918
Each (In a Tube of 50)
Units
Dual - ±2.5 → ±18V 1500µV 1GΩ - 20MHz 80dB - 1 Surface Mount MSOP 10 Rail to Rail Input
RS Stock No. 145-7417
Mfr. Part No.AD8278BRZ
£2.225
Each (In a Tube of 98)
Units
Dual, Single 2 → 36 V ±2 → ±18V 500µV 120kΩ - 1MHz 74dB - 1 Surface Mount SOIC 8 -
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Differential Amplifiers are operational amplifiers configured to amplify differential input signals but to supress or reject common-mode signals; they incorporate on-chip resistors to define the differential gain.