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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Omschrijving Prijs 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-stocknr. 786-3362
FabrikantnummerAD8476ARMZ
FabrikantAnalog Devices
€ 4,64
Each
Aantal stuks
Dual 3 → 18 V ±1.5 → ±9V 900µV - 1V/V 6MHz - - 1 Surface Mount MSOP 8 Rail to Rail Output
RS-stocknr. 779-9561
FabrikantnummerLT1990CS8#PBF
FabrikantAnalog Devices
€ 2,86
Each (In a Pack of 2)
Aantal stuks
Dual, Single 2.7 → 36 V ±250V 4.5mV 2MΩ - 105kHz 58dB - 2 Surface Mount SOIC 8 Rail to Rail Output
RS-stocknr. 145-6212
FabrikantnummerLT1990CS8#PBF
FabrikantAnalog Devices
€ 1,747
Each (In a Tube of 100)
Aantal stuks
Dual, Single 2.7 → 36 V ±250V 4.5mV 2MΩ - 105kHz 58dB - 2 Surface Mount SOIC 8 Rail to Rail Output
RS-stocknr. 912-8810
FabrikantnummerAD8139ARDZ
FabrikantAnalog Devices
€ 5,94
Each (In a Tube of 98)
Aantal stuks
Dual, Single 5 V, 9 V ±3 V, ±5 V 0.5mV 1.5MΩ 0.009dB - 75dB - 1 Surface Mount SOIC 8 Rail to Rail Output
RS-stocknr. 496-7171
FabrikantnummerAD8139ARDZ
FabrikantAnalog Devices
€ 7,46
Each
Aantal stuks
Dual, Single 5 V, 9 V ±3 V, ±5 V 0.5mV 1.5MΩ 0.009dB - 75dB - 1 Surface Mount SOIC 8 Rail to Rail Output
RS-stocknr. 912-7684
FabrikantnummerAD598JRZ
FabrikantAnalog Devices
€ 38,334
Each (In a Tube of 37)
Aantal stuks
- - - - - - - - - - Surface Mount SOIC W 20 -
RS-stocknr. 697-6953
FabrikantnummerAD598JRZ
FabrikantAnalog Devices
€ 42,86
Each
Aantal stuks
- - - - - - - - - - Surface Mount SOIC W 20 -
RS-stocknr. 697-6988
FabrikantnummerAD698APZ
FabrikantAnalog Devices
€ 33,14
Each
Aantal stuks
- 17.5 V 13V - - - - - - - Surface Mount PLCC 28 -
RS-stocknr. 912-6145
FabrikantnummerAD698APZ
FabrikantAnalog Devices
€ 29,634
Each (In a Tube of 39)
Aantal stuks
- 17.5 V 13V - - - - - - - Surface Mount PLCC 28 -
RS-stocknr. 111-2244
FabrikantnummerAD8205YRZ
FabrikantAnalog Devices
€ 2,329
Each (In a Tube of 98)
Aantal stuks
Single 5 V - 2mV 0.4MΩ 33.98dB - 76dB - 1 Surface Mount SOIC 8 -
RS-stocknr. 159-8118
FabrikantnummerAD8276BRMZ
FabrikantAnalog Devices
€ 2,576
Each (In a Tube of 50)
Aantal stuks
Dual, Single 2 → 36 V ±2 → ±18V 0.5mV 0.08MΩ - 550kHz 80dB - 1 Through Hole MSOP 8 Rail to Rail Output
RS-stocknr. 912-7387
FabrikantnummerAD626ARZ
FabrikantAnalog Devices
€ 6,63
Each (In a Tube of 98)
Aantal stuks
Dual, Single 5 V ±5V 2.5mV 0.02MΩ - - 55dB - 1 Surface Mount SOIC 8 -
RS-stocknr. 912-7362
FabrikantnummerAMP03GPZ
FabrikantAnalog Devices
€ 6,543
Each (In a Tube of 50)
Aantal stuks
Dual - ±6 → ± 18V 0.75mV - - - 80dB - 1 Through Hole PDIP 8 -
RS-stocknr. 522-8455
FabrikantnummerAMP03GPZ
FabrikantAnalog Devices
€ 8,23
Each
Aantal stuks
Dual - ±6 → ± 18V 0.75mV - - - 80dB - 1 Through Hole PDIP 8 -
RS-stocknr. 497-0032
FabrikantnummerAD628ARZ
FabrikantAnalog Devices
€ 4,68
Each
Aantal stuks
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 SOIC 8 -
RS-stocknr. 912-8845
FabrikantnummerAD628ARZ
FabrikantAnalog Devices
€ 3,579
Each (In a Tube of 98)
Aantal stuks
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 SOIC 8 -
RS-stocknr. 538-8434
FabrikantnummerAD8205YRZ
FabrikantAnalog Devices
€ 3,03
Each (In a Pack of 5)
Aantal stuks
Single 5 V - 2mV 0.4MΩ 33.98dB - 76dB - 1 Surface Mount SOIC 8 -
RS-stocknr. 160-1735
FabrikantnummerAD8278ARZ
FabrikantAnalog Devices
€ 1,992
Each (In a Tube of 98)
Aantal stuks
Dual, Single 2 → 36 V ±2 → ±18V - - - - 80dB - 1 Surface Mount SOIC 8 -
RS-stocknr. 806-7953
FabrikantnummerAD8279ARZ
FabrikantAnalog Devices
€ 3,72
Each (In a Pack of 2)
Aantal stuks
Dual, Single 2 → 36 V ±2 → ±18V 500µV 120kΩ - 1MHz 74dB - 1 Surface Mount SOIC 14 -
RS-stocknr. 759-0046
FabrikantnummerAD8276BRMZ
FabrikantAnalog Devices
€ 3,37
Each
Aantal stuks
Dual, Single 2 → 36 V ±2 → ±18V 0.5mV 0.08MΩ - 550kHz 80dB - 1 Through Hole MSOP 8 Rail to Rail Output