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
Differential Amplifiers
226
Filters
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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RS Stock No.
697-6988
Mfr. Part No.AD698APZ
BrandAnalog Devices
|
SGD50.77
Each
units
|
- | 17.5 V | 13V | - | - | - | - | - | - | - | Surface Mount | PLCC | 28 | - |
|
|
RS Stock No.
912-6145
Mfr. Part No.AD698APZ
BrandAnalog Devices
|
SGD46.01
Each (In a Tube of 39)
units
|
- | 17.5 V | 13V | - | - | - | - | - | - | - | Surface Mount | PLCC | 28 | - |
|
RS Stock No.
759-0042
Mfr. Part No.AD8276ARMZ
BrandAnalog Devices
|
SGD3.40
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.
177-7172
Mfr. Part No.LT6350CMS8#PBF
BrandLinear Technology
|
SGD6.231
Each (In a Tube of 50)
units
|
Single | 2.7 → 12 V | - | 1.5mV | 4MΩ | - | 115MHz | 96dB | - | 2 | Surface Mount | MSOP | 8 | Rail to Rail Input/Output |
|
RS Stock No.
923-2271
Mfr. Part No.INA105KU
BrandTexas Instruments
|
SGD9.804
Each (In a Tube of 75)
units
|
Dual | - | ±15V | 0.5mV | 0.05MΩ | 0dB | - | 72dB | - | 1 | Surface Mount | SOIC | 8 | - |
|
RS Stock No.
230-551
Mfr. Part No.AD629ARZ
BrandAnalog Devices
|
SGD10.94
Each
units
|
Dual | - | ±12 V, ±15 V, ±3 V, ±5 V, ±9 V | 1mV | 0.8MΩ | 0dB | - | 77dB | - | 1 | Surface Mount | SOIC | 8 | - |
|
|
RS Stock No.
851-6821
Mfr. Part No.LT6350CMS8#PBF
BrandLinear Technology
|
SGD7.315
Each (In a Pack of 2)
units
|
Single | 2.7 → 12 V | - | 1.5mV | 4MΩ | - | 115MHz | 96dB | - | 2 | Surface Mount | MSOP | 8 | Rail to Rail Input/Output |
|
|
RS Stock No.
106-6377
Mfr. Part No.AD629ARZ
BrandAnalog Devices
|
SGD7.697
Each (In a Tube of 98)
units
|
Dual | - | ±12 V, ±15 V, ±3 V, ±5 V, ±9 V | 1mV | 0.8MΩ | 0dB | - | 77dB | - | 1 | Surface Mount | SOIC | 8 | - |
|
RS Stock No.
160-3354
Mfr. Part No.AD8207WBRZ
BrandAnalog Devices
|
SGD5.455
Each (In a Tube of 98)
units
|
Single | 3.3 → 5.5 V | - | 100µV | - | 20V/V | 150kHz | 80dB | - | 1 | Surface Mount | SOIC | 8 | No |
|
RS Stock No.
100-0744
Mfr. Part No.INA105KP
BrandTexas Instruments
|
SGD11.239
Each (In a Tube of 50)
units
|
Dual | - | ±15V | 0.5mV | 0.05MΩ | 0dB | - | 72dB | - | 1 | Through Hole | PDIP | 8 | - |
|
RS Stock No.
912-7561
Mfr. Part No.AD628ARMZ
BrandAnalog Devices
|
SGD5.767
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.
288-733
Mfr. Part No.INA105KU
BrandTexas Instruments
|
SGD9.80
Each
units
|
Dual | - | ±15V | 0.5mV | 0.05MΩ | 0dB | - | 72dB | - | 1 | Surface Mount | SOIC | 8 | - |
|
|
RS Stock No.
647-659
Mfr. Part No.INA105KP
BrandTexas Instruments
|
SGD13.33
Each
units
|
Dual | - | ±15V | 0.5mV | 0.05MΩ | 0dB | - | 72dB | - | 1 | Through Hole | PDIP | 8 | - |
|
|
RS Stock No.
809-9288
Mfr. Part No.AD8207WBRZ
BrandAnalog Devices
|
SGD7.97
Each
units
|
Single | 3.3 → 5.5 V | - | 100µV | - | 20V/V | 150kHz | 80dB | - | 1 | Surface Mount | SOIC | 8 | No |
|
RS Stock No.
538-6595
Mfr. Part No.AD628ARMZ
BrandAnalog Devices
|
SGD6.82
Each
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.
162-5026
Mfr. Part No.INA157U
BrandTexas Instruments
|
SGD5.276
Each (In a Tube of 75)
units
|
Dual | - | ±15V | 0.5mV | 0.024MΩ | 6.02dB | - | 86dB | - | 1 | Surface Mount | SOIC | 8 | - |
|
RS Stock No.
121-6909
Mfr. Part No.ADA4927-1YCPZ-R2
BrandAnalog Devices
|
SGD10.464
Each (On a Reel of 250)
units
|
Dual, Single | 5 V | ±5V | 5.2mV | 7.5kΩ | 1V/V | 2GHz | -70dB | - | 1 | Surface Mount | LFCSP | 16 | - |
|
RS Stock No.
661-2527
Mfr. Part No.THS4141CD
BrandTexas Instruments
|
SGD12.09
Each
units
|
Dual, Single | 5 V | ±15V | 7mV | 14.4MΩ | 67dB | - | 75dB | - | 1 | Surface Mount | SOIC | 8 | - |
|
RS Stock No.
923-2433
Mfr. Part No.LMH6552MA/NOPB
BrandTexas Instruments
|
SGD11.314
Each (In a Tube of 95)
units
|
Dual, Single | 5 V, 9 V | ±3 V, ±5 V | 16.5mV | 0.000015MΩ | 0dB | - | - | - | 1 | Surface Mount | SOIC | 8 | - |
|
RS Stock No.
786-3362
Mfr. Part No.AD8476ARMZ
BrandAnalog Devices
|
SGD7.43
Each
units
|
Dual | 3 → 18 V | ±1.5 → ±9V | 900µV | - | 1V/V | 6MHz | - | - | 1 | Surface Mount | MSOP | 8 | Rail to Rail Output |
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