LT1228

所属类别：高速放大器（大于等于 50MHz）
产品名称：100MHz Current Feedback Amplifier with DC Gain Control
厂商：LT
生产批号：10+
封装：DIP-8,SO-8
库存状态：有库存
库存量：2000
最低订购量：1
详细资料：

Product Introduction

LT1228100MHz Current Feedback Amplifier with DC Gain Control

peculiarity

Very Fast Transconductance Amplifier Bandwidth: 75MHz
Outputs Swing Within 0.8V of Supplies
gm = 10 x I_SET
Low THD: 0.2% at 30mV_RMS Input
Wide I_SET Range: 1µA to 1mA
Very Fast Current Feedback Amplifier
Bandwidth: 100MHz
Slew Rate: 1000V/µs
Output Drive Current: 30mA
Differential Gain: 0.04%
Differential Phase: 0.1°
High Input Impedance: 25M Ohm, 6pF
Wide Supply Range: ±2V to ±15V
Inputs Common Mode to Within 1.5V of Supplies
Supply Current: 7mA
Available in 8-Lead PDIP and SOIC Packages

description

TheLT®1228 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.

apply

Video DC Restore (Clamp) Circuits
Video Differential Input Amplifiers
Video Keyer/Fader Amplifiers
AGC Amplifiers
Tunable Filters
Oscillators

The ICs associated with the LT1228 include:

Model	Manufacturers	lot number	encapsulation	illustrate
ADP5030ACBZ-1228R7	Analog Devices	15+	WLCSP -16	Dual-channel, 200 mA, high-performance RF LDO with built-in load switch
ADP222ACPZ-1228-R7	Analog Devices	15+	8 ld LFCSP	300 mA adjustable dual output voltage regulator
ADP2140ACPZ1228R7	ADI	14+	0-pin, 3 mm × 3 mm small LFCSP packages	3 MHz, 600 mA, low quiescent current buck converter and 300 mA LDO regulator
V42-12288-Z1048-PF	LITTELFUSE	11+	DIP	connector
LT1228	LT	10+	DIP-8,SO-8	100MHz Current Feedback Amplifier with DC Gain Control
12289	Intersil	02+	N／A	N／A
X1228S14I-4.5A	XICOR	04+	SOP-14	Brand new original
LT1228CN8	LINEAR	04+	DIP	Brand new original
MAX1228AEEP	MAXIM	05+	QSOP	Brand new original
X1228-SKT	PS	N／A	N／A	broker
X1228V14I	XICOR	N／A	N／A	Real-time clock/calendar, 1/100 accuracy dual alarms, on-chip oscillator compensation circuit, programmable watchdog + power-up/low-level reset, 256K bits
X1228	Xicor	N／A	N／A	N／A
X1228S14I-2.7A	XICOR	04+	SOP-14	Brand new original
X1228S14I-2.7	XICOR	N／A	N／A	Real-time clock/calendar, 1/100 accuracy dual alarms, on-chip oscillator compensation circuit, programmable watchdog + power-up/low-level reset, 256K bits

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