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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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庫存編號 709-7070
製造零件編號AD8216YRZ
HK$35.00
單位
Single 5 V - 0.5mV 0.4MΩ 9.54dB - 80dB - 1 Surface Mount SOIC 8 -
RS庫存編號 159-7869
製造零件編號AD8216YRZ
HK$22.912
毎管:98 個
單位
Single 5 V - 0.5mV 0.4MΩ 9.54dB - 80dB - 1 Surface Mount SOIC 8 -
RS庫存編號 160-1726
製造零件編號AD8216WYRZ
HK$26.731
毎管:98 個
單位
Single 4.5 → 5.5 V - ±0.5 (Typical)mV 200 (Common Mode) kΩ, 400 (Differential) kΩ 3 (Typical)V/V 3MHz - - 1 Surface Mount SOIC 8 -
RS庫存編號 806-7903
製造零件編號AD8216WYRZ
HK$37.31
/個 (每包:2個)
單位
Single 4.5 → 5.5 V - ±0.5 (Typical)mV 200 (Common Mode) kΩ, 400 (Differential) kΩ 3 (Typical)V/V 3MHz - - 1 Surface Mount SOIC 8 -
RS庫存編號 759-1297
製造零件編號AD8276ARZ
HK$21.81
單位
Dual, Single 2 → 36 V ±2 → ±18V 0.5mV 0.08MΩ - 550kHz 80dB - 1 Surface Mount SOIC 8 Rail to Rail Output
RS庫存編號 178-8879
製造零件編號LME49724MR/NOPB
HK$35.189
毎管:95 個
單位
- - - - - - - - - - - - - -
RS庫存編號 824-7020
製造零件編號LME49724MR/NOPB
HK$23.87
/個 (每包:2個)
單位
Dual - ±2.5 → ±18V - - - 50MHz - - 1 Surface Mount SOIC 8 -
RS庫存編號 761-8582
製造零件編號LT1994CMS8#PBF
HK$33.78
單位
Single 3 V - ±3mV .0045MΩ 100dB 70MHz 55dB - 2 Surface Mount MSOP 8 Rail to Rail Input/Output
RS庫存編號 912-9945
製造零件編號AD8476BRMZ
HK$39.717
毎管:50 個
單位
Dual 3 → 18 V ±1.5 → ±9V - 500kΩ 1V/V 6MHz 90dB - 1 Surface Mount MSOP 8 Rail to Rail Output
RS庫存編號 807-1665
製造零件編號ADA4927-1YCPZ-R2
HK$84.03
單位
Dual, Single 5 V ±5V 5.2mV 7.5kΩ 1V/V 2GHz -70dB - 1 Surface Mount LFCSP 16 -
RS庫存編號 100-0744
製造零件編號INA105KP
HK$55.565
毎管:50 個
單位
Dual - ±15V 0.5mV 0.05MΩ 0dB - 72dB - 1 Through Hole PDIP 8 -
RS庫存編號 778-5118
製造零件編號AD8476BRMZ
HK$47.84
單位
Dual 3 to 18 V ±1.5 to ±9V - 500kΩ 1V/V 6MHz 90dB - 1 Surface Mount MSOP 8 Rail to Rail Output
RS庫存編號 814-4013
製造零件編號THS4531AID
HK$23.844
/個 (每包:5個)
單位
Single 2.5 → 5.5 V - ±2000µV - 113dB 27MHz 90dB - 1 Surface Mount SOIC 8 Rail to Rail Output
RS庫存編號 162-8363
製造零件編號THS4531AID
HK$22.919
毎管:75 個
單位
Single 2.5 → 5.5 V - ±2000µV - 113dB 27MHz 90dB - 1 Surface Mount SOIC 8 Rail to Rail Output
RS庫存編號 647-659
製造零件編號INA105KP
HK$72.43
單位
Dual - ±15V 0.5mV 0.05MΩ 0dB - 72dB - 1 Through Hole PDIP 8 -
RS庫存編號 121-6909
製造零件編號ADA4927-1YCPZ-R2
HK$58.044
個 (在毎卷:250)
單位
Dual, Single 5 V ±5V 5.2mV 7.5kΩ 1V/V 2GHz -70dB - 1 Surface Mount LFCSP 16 -
RS庫存編號 820-9454
製造零件編號AD8274ARMZ
HK$19.992
/個 (每包:5個)
單位
Dual - ±2.5 → ±18V 1100µV 9kΩ - 10MHz 83dB - 1 Surface Mount MSOP 8 -
RS庫存編號 496-7165
製造零件編號AD8137YRZ
HK$19.934
/個 (每包:5個)
單位
Dual, Single 3 V, 5 V, 9 V ±3 V, ±5 V 2.7mV 0.8MΩ 0.172dB - 62dB - 1 Surface Mount SOIC 8 Rail to Rail Output
RS庫存編號 811-5771
製造零件編號LMH6881SQE/NOPB
HK$76.50
單位
Single 5 V - - 100Ω 26dB 2.4GHz -40dB - 1 Surface Mount WQFN 24 -
RS庫存編號 822-5783
製造零件編號LTC6406IUD#PBF
HK$59.82
單位
Single 2.7 → 3.5 V - ±5mV 3 (Differential Mode) kΩ, 130 (Common Mode) kΩ 90dB 3GHz - - 1 Surface Mount QFN 16 Rail to Rail Input