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Product Details
The LT1228 makes it easy to electronically control the gain of signals from DC to video frequencies. The LT1228 implements gain control with a transconductance amplifier (voltage to current) whose gain is proportional to an externally controlled current. A resistor is typically used to convert the output current to a voltage, which is then amplified with a current feedback amplifier. The LT1228 combines both amplifiers into an 8-pin package, and operates on any supply voltage from 4V (±2V) to 30V (±15V). A complete differential input, gain controlled amplifier can be implemented with the LT1228 and just a few resistors.
The LT1228 transconductance amplifier has a high impedance differential input and a current source output with wide output voltage compliance. The transconductance, gm, is set by the current that flows into Pin5, ISET. The small signal gm is equal to ten times the value of ISET and this relationship holds over several decades of set current. The voltage at Pin 5 is two diode drops above the negative supply, Pin 4.
The LT1228 current feedback amplifier has very high input impedance and therefore it is an excellent buffer for the output of the transconductance amplifier. The current feedback amplifier maintains its wide bandwidth over a wide range of voltage gains making it easy to interface the transconductance amplifier output to other circuitry. The current feedback amplifier is designed to drive low impedance loads, such as cables, with excellent linearity at high frequencies.
Applications
A range of Current Feedback operational amplifiers from Linear Technology. The current feedback topology employed in these op amps enables better high frequency performance than can be obtained from the more common voltage feedback architecture making these devices ideal for high speed video applications. Typical applications for these high speed op amps include video and RGB amplifiers, . ADSL and cable drivers, test equipment amplifiers and high speed buffers.
Amplifier Type = Current Feedback
Mounting Type = Surface Mount
Package Type = SOIC
Power Supply Type = Dual, Single
Number of Channels per Chip = 1
Pin Count = 8
Typical Single Supply Voltage = 5 - 28 V
Typical Dual Supply Voltage = ±12 V, ±3 V, ±5 V, ±9 V
Typical Slew Rate = 500V/µs
Maximum Operating Temperature = +70 °C
A range of Current Feedback operational amplifiers from Linear Technology. The current feedback topology employed in these op amps enables better high frequency performance than can be obtained from the more common voltage feedback architecture making these devices ideal for high speed video applications. Typical applications for these high speed op amps include video and RGB amplifiers, . ADSL and cable drivers, test equipment amplifiers and high speed buffers.
Amplifier Type = Current Feedback
Mounting Type = Surface Mount
Package Type = SOIC
Power Supply Type = Dual, Single
Number of Channels per Chip = 1
Pin Count = 8
Typical Single Supply Voltage = 5 - 28 V
Typical Dual Supply Voltage = ±12 V, ±3 V, ±5 V, ±9 V
Typical Slew Rate = 500V/µs
Maximum Operating Temperature = +70 °C
Delivery on production packaging - Tube. This product is non-returnable.
IC OPAMP CFA 1 CIRCUIT 8SO
IC OPAMP CFA 1 CIRCUIT 8SO
High Speed Operational Amplifiers 100MHz C F Amp w/ DC Gain Control
IC OPAMP CFA 1 CIRCUIT 8SO
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Current Feedback Amplifier 1 Circuit 8-SO
Current Feedback Amplifier 1 Circuit 8-SO
TRANSCONDUCTANCE AMPLIFIER ROHS COMPLIANT: YES
| Analog Devices, Inc. | RS Components, Ltd. | LIXINC Electronics Co., Limited | Shenzhen Shengyu Electronics Technology Limited | VAST STOCK CO., LIMITED | Lingto Electronic Limited | Richardson RFPD | Quarktwin Technology Ltd. | DigiKey | Newark, An Avnet Company | |
|---|---|---|---|---|---|---|---|---|---|---|
| Product Category | Operational Amplifiers | Operational Amplifiers | Operational Amplifiers | Operational Amplifiers | Operational Amplifiers | Operational Amplifiers | Operational Amplifiers | Operational Amplifiers | Operational Amplifiers | Amplifier and Comparator Chips |
| Product Number | LT1228CS8#PBF | 5455382 | LT1228CS8#PBF | LT1228CS8#PBF | LT1228CS8#PBF | LT1228CS8#PBF | LT1228CS8#PBF | LT1228CS8#PBF | 505-LT1228CS8#PBF-ND | 51AK7920 |
| Product Name | 100MHz Current Feedback Amplifier with DC Gain Control | Integrated Circuits | Integrated Circuits (ICs) - Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps | High Speed Operational Amplifiers | Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps | Amplifier - Op Amps | Instrumentation, OP Amps, Buffer Amps | Instrumentation, OP Amps, Buffer Amps | Transconductance Amplifier Rohs Compliant Analog Devices | |
| Standards | RoHS | RoHS | ||||||||
| Supply Voltage (VS) | 4 to 36 volts | 5 to 28 volts | 4 to 36 volts | 36 volts | ||||||
| VOS | 5 millivolts | 3 millivolts | 3 millivolts | |||||||
| IBIAS | 1 µA | 10 µA | 10 µA | |||||||
| Quiescent Current (IQ) | 9000 microamps |
