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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detalji proizvoda Proizvođač 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 Maximum Supply Current Dimensions Height Width Length Maximum Operating Temperature Minimum Operating Temperature
AD8475BRMZ Analog Devices, Differential Amplifier 150MHz Rail to Rail Input/Output 10-Pin MSOP Analog Devices Dual, Single 3 → 10 V ±1.5 to ±5V - 1.75kΩ - 150MHz 86dB Differential 1 Surface Mount MSOP 10 Rail to Rail Input/Output 3.2 mA 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +85 °C -40 °C
AD8475BRMZ Analog Devices, Differential Amplifier 150MHz Rail to Rail Input/Output 10-Pin MSOP Analog Devices Dual, Single 3 → 10 V ±1.5 to ±5V - 1.75kΩ - 150MHz 86dB Differential 1 Surface Mount MSOP 10 Rail to Rail Input/Output 3.2 mA 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +85 °C -40 °C
LT6350CMS8#PBF Linear Technology, 2-Channel Differential Amplifier 115MHz Rail to Rail Input/Output 8-Pin MSOP Linear Technology Single 2.7 → 12 V - 1.5mV 4MΩ - 115MHz 96dB - 2 Surface Mount MSOP 8 Rail to Rail Input/Output 10.4 mA 3 x 3 x 0.86mm 0.86mm 3mm 3mm +70 °C 0 °C
AD8137YCPZ-REEL7 Analog Devices, Differential Amplifier 110MHz Rail to Rail Output 8-Pin LFCSP WD Analog Devices Single 2.7 → 12 V - 2.6mV 800kΩ 91dB 110MHz 66dB - 1 Surface Mount LFCSP WD 8 Rail to Rail Output 245 μA 3.1 x 3.1 x 0.8mm 0.8mm 3.1mm 3.1mm +125 °C -40 °C
ADA4950-2YCPZ-R7 Analog Devices, 2-Channel Differential Line Driver 750MHz 24-Pin LFCSP VQ Analog Devices Dual, Single 3 → 11 V ±5V 2.5mV 32kΩ 66dB 750MHz -64dB - 2 Surface Mount LFCSP VQ 24 - 10.1 mA 4 x 4 x 0.95mm 0.95mm 4mm 4mm +105 °C -40 °C
AD8390AACPZ-R7 Analog Devices, 2-Channel Differential Amplifier 45MHz No 16-Pin LFCSP Analog Devices Dual, Single - - +3V - - 45MHz 58dB Differential 2 Surface Mount LFCSP 16 No 11 mA 4.1 x 4.1 x 0.75mm 0.75mm 4.1mm 4.1mm +85 °C -40 °C
AD8274ARMZ Analog Devices, Differential Amplifier 10MHz 8-Pin MSOP Analog Devices Dual - ±2.5 → ±18V 1100µV 9kΩ - 10MHz 83dB - 1 Surface Mount MSOP 8 - 2.6 mA 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 3.2mm +85 °C -40 °C
ADA4932-2YCPZ-R7 Analog Devices, 2-Channel Differential Line Driver 1GHz 24-Pin LFCSP VQ Analog Devices Dual, Single 3 → 11 V ±5V 2.2mV 11MΩ 66dB 1GHz -100dB - 2 Surface Mount LFCSP VQ 24 - 10.1 mA 4 x 4 x 0.95mm 0.95mm 4mm 4mm +105 °C -40 °C
ADA4830-1BCPZ-R7 Analog Devices, Differential Amplifier 84MHz Rail to Rail Output 8-Pin LFCSP Analog Devices Single 2.9 → 5.5 V ±1.5 → ±5V - 20kΩ - 84MHz 45dB - 1 Surface Mount LFCSP 8 Rail to Rail Output 4.1 mA 3.1 x 3.1 x 0.75mm 0.75mm 3.1mm 3.1mm +125 °C -40 °C
AD8271BRMZ Analog Devices, Differential Amplifier 20MHz Rail to Rail Input 10-Pin MSOP Analog Devices Dual - ±2.5 → ±18V 1000µV 1GΩ - 20MHz 80dB - 1 Surface Mount MSOP 10 Rail to Rail Input 3.2 mA 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +85 °C -40 °C
AD8278ARMZ Analog Devices, Differential Amplifier 1MHz 8-Pin MSOP Analog Devices Dual, Single 2 → 36 V ±2 → ±18V 500µV 120 (Differential) kΩ, 30 (Common Mode) kΩ - 1MHz 74dB - 1 Surface Mount MSOP 8 - 400 μA 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 3.2mm +85 °C -40 °C
AD8278ARZ Analog Devices, Differential Amplifier 8-Pin SOIC Analog Devices Dual, Single 2 → 36 V ±2 → ±18V - - - - 80dB - 1 Surface Mount SOIC 8 - 250 μA 8.75 x 4 x 1.5mm 1.5mm 4mm 8.75mm +85 °C -40 °C
LMP8350MA/NOPB Texas Instruments, Differential Amplifier 118MHz No 8-Pin SOIC Texas Instruments Single 4.5 → 12 V - ±2.52mV 0.48MΩ 130dB 118MHz - - 1 Surface Mount SOIC 8 No 18 mA 5 x 4 x 1.5mm 1.5mm 4mm 5mm +85 °C -40 °C
ADA4960-1ACPZ-R7 Analog Devices, Differential Line Driver 5GHz 16-Pin LFCSP WQ Analog Devices Single 5 V - - 10kΩ 18dB 5GHz 60dB - 1 Surface Mount LFCSP WQ 16 - 64 mA 3.1 x 3.1 x 0.75mm 0.75mm 3.1mm 3.1mm +85 °C -40 °C
AD8276ARMZ Analog Devices, Differential Amplifier 550kHz Rail to Rail Output 8-Pin MSOP Analog Devices Dual, Single 2 → 36 V ±2 → ±18V 0.5mV 0.08MΩ - 550kHz 80dB - 1 Surface Mount MSOP 8 Rail to Rail Output 0.2 mA 3.2 x 3.2 x 0.95mm 0.95mm 3.2mm 3.2mm +85 °C -40 °C
LMH6881SQE/NOPB Texas Instruments, Differential Amplifier 2.4GHz 24-Pin WQFN Texas Instruments Single 5 V - - 100Ω 26dB 2.4GHz -40dB - 1 Surface Mount WQFN 24 - 135 mA 4 x 4 x 0.8mm 0.8mm 4mm 4mm +85 °C -40 °C
AD629ARZ Analog Devices, Differential Amplifier 8-Pin SOIC Analog Devices Dual - ±12 V, ±15 V, ±3 V, ±5 V, ±9 V 1mV 0.8MΩ 0dB - 77dB - 1 Surface Mount SOIC 8 - - 5 x 4 x 1.5mm 1.5mm 4mm 5mm +85 °C -40 °C
ADA4940-1ACPZ-R2 Analog Devices, Differential Amplifier 260MHz Rail to Rail Output 16-Pin LFCSP Analog Devices Single 7 V - 0.35mV 50MΩ 99dB 260MHz 86dB - 1 Surface Mount LFCSP 16 Rail to Rail Output - 3 x 3 x 0.95mm 0.95mm 3mm 3mm +125 °C -40 °C
LT1990CS8#PBF Linear Technology, 2-Channel Differential Amplifier 105kHz Rail to Rail Output 8-Pin SOIC Linear Technology Dual, Single 2.7 → 36 V ±250V 4.5mV 2MΩ - 105kHz 58dB - 2 Surface Mount SOIC 8 Rail to Rail Output 170 μA 5.004 x 3.988 x 1.498mm 1.498mm 3.988mm 5mm +85 °C -40 °C
AD8205YRZ Analog Devices, Differential Amplifier 8-Pin SOIC Analog Devices Single 5 V - 2mV 0.4MΩ 33.98dB - 76dB - 1 Surface Mount SOIC 8 - - 5 x 4 x 1.5mm 1.5mm 4mm 5mm +125 °C -40 °C
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