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 378-2777
製造零件編號INA145UA
TWD112.00
單位
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 1mV 0.08MΩ 60dB - 76dB - 1 Surface Mount SOIC 8 -
RS庫存編號 160-1726
製造零件編號AD8216WYRZ
TWD114.10
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
TWD140.00
/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 709-7070
製造零件編號AD8216YRZ
TWD121.00
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
TWD100.60
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 921-2883
製造零件編號INA149AID
TWD182.90
毎管:75 個
單位
Dual, Single 4 → 36 V ±2 → ±18V 1100µV - 1V/V - 90dB - 1 Surface Mount SOIC 8 -
RS庫存編號 813-6542
製造零件編號INA149AID
TWD219.00
單位
Dual, Single 4 → 36 V ±2 → ±18V 1100µV - 1V/V - 90dB - 1 Surface Mount SOIC 8 -
RS庫存編號 100-0744
製造零件編號INA105KP
TWD252.80
毎管:50 個
單位
Dual - ±15V 0.5mV 0.05MΩ 0dB - 72dB - 1 Through Hole PDIP 8 -
RS庫存編號 851-6859
製造零件編號LTC6362IMS8#PBF
TWD103.00
/個 (每包:5個)
單位
Single 2.8 → 5.25 V - ±30mV 230kΩ 95dB 180MHz 75dB - 1 Surface Mount MSOP 8 Rail to Rail Input/Output
RS庫存編號 806-7935
製造零件編號AD8274ARZ
TWD93.00
/個 (每包:2個)
單位
Dual - ±2.5 → ±18V 1100µV - - 20MHz 83dB - 1 Surface Mount SOIC 8 -
RS庫存編號 160-1733
製造零件編號AD8274ARZ
TWD67.70
毎管:98 個
單位
Dual - ±2.5 → ±18V 1100µV - - 20MHz 83dB - 1 Surface Mount SOIC 8 -
RS庫存編號 647-659
製造零件編號INA105KP
TWD237.00
單位
Dual - ±15V 0.5mV 0.05MΩ 0dB - 72dB - 1 Through Hole PDIP 8 -
RS庫存編號 912-6237
製造零件編號AD8275ARMZ
TWD101.30
毎管:50 個
單位
Dual, Single 5 V ±3 V, ±5 V - 0.108MΩ 13.98dB - 80dB - 1 Surface Mount MSOP 8 Rail to Rail Output
RS庫存編號 661-2397
製造零件編號INA159AIDGKT
TWD124.00
單位
Single 3 V, 5 V - 0.5mV 0.24MΩ 13.98dB - 80dB - 1 Surface Mount MSOP 8 Rail to Rail Input
RS庫存編號 145-1135
製造零件編號LTC1992CMS8#PBF
TWD93.00
毎管:50 個
單位
Dual, Single 2.7 → 11 V ±1.35 → ±5V ±2.5mV 500MΩ 80dB 3MHz - - 1 Surface Mount MSOP 8 Rail to Rail Output
RS庫存編號 697-7252
製造零件編號AD8275ARMZ
TWD124.00
單位
Dual, Single 5 V ±3 V, ±5 V - 0.108MΩ 13.98dB - 80dB - 1 Surface Mount MSOP 8 Rail to Rail Output
RS庫存編號 796-9151
製造零件編號AD8476BCPZ-WP
TWD168.00
單位
Dual, Single 3 → 18 V ±1.5 → ±9V 200µV - - 6MHz 90dB - 1 Surface Mount LFCSP 16 Rail to Rail Output
RS庫存編號 159-9369
製造零件編號AD8476BCPZ-WP
TWD161.80
Each (In a Tray of 50)
單位
Dual, Single 3 → 18 V ±1.5 → ±9V 200µV - - 6MHz 90dB - 1 Surface Mount LFCSP 16 Rail to Rail Output
RS庫存編號 912-7362
製造零件編號AMP03GPZ
TWD189.70
毎管:50 個
單位
Dual - ±6 → ± 18V 0.75mV - - - 80dB - 1 Through Hole PDIP 8 -
RS庫存編號 759-0042
製造零件編號AD8276ARMZ
TWD73.00
單位
Dual, Single 2 → 36 V ±2 → ±18V 0.5mV 0.08MΩ - 550kHz 80dB - 1 Surface Mount MSOP 8 Rail to Rail Output