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. 759-0046
Mfr. Part No.AD8276BRMZ
£2.90
Each
Units
Dual, Single 2 → 36 V ±2 → ±18V 0.5mV 0.08MΩ - 550kHz 80dB - 1 Through Hole MSOP 8 Rail to Rail Output
RS Stock No. 159-8118
Mfr. Part No.AD8276BRMZ
£2.342
Each (In a Tube of 50)
Units
Dual, Single 2 → 36 V ±2 → ±18V 0.5mV 0.08MΩ - 550kHz 80dB - 1 Through Hole MSOP 8 Rail to Rail Output
RS Stock No. 912-7561
Mfr. Part No.AD628ARMZ
£3.091
Each (In a Tube of 50)
Units
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 3mV 0.22MΩ 40dB - 75dB - 2 Surface Mount MSOP 8 -
RS Stock No. 806-7896
Mfr. Part No.AD8208WBRMZ
£3.21
Each (In a Pack of 2)
Units
Single 4.5 → 5.5 V - ±2mV 220 (Common Mode) kΩ, 440 (Differential) kΩ 10V/V 70kHz 80dB - 1 Surface Mount MSOP 8 -
RS Stock No. 160-1725
Mfr. Part No.AD8208WBRMZ
£2.467
Each (In a Tube of 50)
Units
Single 4.5 → 5.5 V - ±2mV 220 (Common Mode) kΩ, 440 (Differential) kΩ 10V/V 70kHz 80dB - 1 Surface Mount MSOP 8 -
RS Stock No. 121-8455
Mfr. Part No.INA106KP
£8.457
Each (In a Tube of 50)
Units
Dual - ±15V 0.5mV 0.11MΩ 20dB - 86dB - 1 Through Hole PDIP 8 -
RS Stock No. 761-9285
Mfr. Part No.LTC1992IMS8#PBF
£3.68
Each
Units
Dual, Single 2.7 V ±5V ±2.5mV 500MΩ 80dB 4MHz 60dB - 2 Surface Mount MSOP 8 Rail to Rail Input/Output
RS Stock No. 162-4336
Mfr. Part No.THS4131CD
£5.287
Each (In a Tube of 75)
Units
Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount SOIC 8 -
RS Stock No. 160-2822
Mfr. Part No.AD8137YCPZ-R2
£2.622
Each (On a Reel of 250)
Units
Dual, Single 12 V ±6V 2.75mV 800kΩ 91dB 110MHz 62dB - 1 Surface Mount LFCSP 8 Rail to Rail Output
RS Stock No. 809-9266
Mfr. Part No.AD8137YCPZ-REEL7
£2.122
Each (In a Pack of 5)
Units
Single 2.7 → 12 V - 2.6mV 800kΩ 91dB 110MHz 66dB - 1 Surface Mount LFCSP WD 8 Rail to Rail Output
RS Stock No. 168-4301
Mfr. Part No.AD8137YCPZ-REEL7
£1.281
Each (On a Reel of 1500)
Units
Single 2.7 → 12 V - 2.6mV 800kΩ 91dB 110MHz 66dB - 1 Surface Mount LFCSP WD 8 Rail to Rail Output
RS Stock No. 877-8824
Mfr. Part No.AD8137YCPZ-R2
£3.85
Each (In a Pack of 2)
Units
Dual, Single 12 V ±6V 2.75mV 800kΩ 91dB 110MHz 62dB - 1 Surface Mount LFCSP 8 Rail to Rail Output
RS Stock No. 527-580
Mfr. Part No.THS4131CD
£6.51
Each
Units
Dual, Single 5 V ±15V 2mV 34MΩ 78dB 225MHz 80dB - 1 Surface Mount SOIC 8 -
RS Stock No. 647-665
Mfr. Part No.INA106KP
£9.69
Each
Units
Dual - ±15V 0.5mV 0.11MΩ 20dB - 86dB - 1 Through Hole PDIP 8 -
RS Stock No. 912-8977
Mfr. Part No.AD8132ARMZ
£2.514
Each (In a Tube of 50)
Units
Dual, Single 3 V, 5 V, 9 V ±3 V, ±5 V 3.5mV 3MΩ 0.129dB - - - 1 Surface Mount MSOP 8 -
RS Stock No. 786-9733
Mfr. Part No.LT6600CS8-5#PBF
£5.41
Each
Units
Dual, Single 5 V ±5V 35mV 7.7kΩ - - - - 1 Surface Mount SOIC 8 -
RS Stock No. 759-0042
Mfr. Part No.AD8276ARMZ
£2.21
Each
Units
Dual, Single 2 → 36 V ±2 → ±18V 0.5mV 0.08MΩ - 550kHz 80dB - 1 Surface Mount MSOP 8 Rail to Rail Output
RS Stock No. 378-2783
Mfr. Part No.INA146UA
£4.13
Each
Units
Dual, Single 12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V ±12 V, ±15 V, ±3 V, ±5 V, ±9 V 10mV 0.11MΩ 40dB - 70dB - 1 Surface Mount SOIC 8 -
RS Stock No. 497-3687
Mfr. Part No.AD8132ARMZ
£3.28
Each
Units
Dual, Single 3 V, 5 V, 9 V ±3 V, ±5 V 3.5mV 3MΩ 0.129dB - - - 1 Surface Mount MSOP 8 -
RS Stock No. 921-2883
Mfr. Part No.INA149AID
£4.329
Each (In a Tube of 75)
Units
Dual, Single 4 → 36 V ±2 → ±18V 1100µV - 1V/V - 90dB - 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.