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LT1228 Datasheet(PDF) 4 Page - Linear Technology |
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LT1228 Datasheet(HTML) 4 Page - Linear Technology |
4 / 20 page LT1228 4 ELECTRICAL C C HARA TERISTICS Transconductance Amplifier, Pins 1, 2, 3, 5. ±5V ≤ VS ≤ ±15V, ISET = 100µA, VCM = 0V unless otherwise noted. CMRR Common-Mode Rejection Ratio VS = ±15V, VCM = ±13V, TA = 25°C 60 100 dB VS = ±15V, VCM = ±12V q 60 dB VS = ±5V, VCM = ±3V, TA = 25°C 60 100 dB VS = ±5V, VCM = ±2V q 60 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±15V, TA = 25°C 60 100 dB VS = ±3V to ±15V q 60 dB gm Transconductance ISET = 100µA, IOUT = ±30µA, TA = 25°C 0.75 1.00 1.25 µA/mV Transconductance Drift q –0.33 %/ °C IOUT Maximum Output Current ISET = 100µA q 70 100 130 µA IOL Output Leakage Current ISET = 0µA (+IIN of CFA), TA = 25°C 0.3 3 µA q 10 µA VOUT Maximum Output Voltage Swing VS = ±15V , R1 = ∞ q ±13 ±14 V VS = ±5V , R1 = ∞ q ±3 ±4V RO Output Resistance VS = ±15V, VOUT = ±13V q 28 M Ω VS = ±5V, VOUT = ±3V q 28 M Ω Output Capacitance (Note 2) VS = ±5V 6 pF IS Supply Current, Both Amps ISET = 1mA q 915 mA THD Total Harmonic Distortion VIN = 30mVRMS at 1kHz, R1 = 100k 0.2 % BW Small-Signal Bandwidth R1 = 50 Ω, ISET = 500µA 80 MHz tr Small-Signal Rise Time R1 = 50 Ω, ISET = 500µA, 10% to 90% 5 ns Propagation Delay R1 = 50 Ω, ISET = 500µA, 50% to 50% 5 ns SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS The q denotes specifications which apply over the operating temperature range. Note 1: A heat sink may be required depending on the power supply voltage. Note 2: This is the total capacitance at pin 1. It includes the input capacitance of the current feedback amplifier and the output capacitance of the transconductance amplifier. Note 3: Slew rate is measured at ±5V on a ±10V output signal while operating on ±15V supplies with RF = 1k, RG = 110Ω and RL = 400Ω. The slew rate is much higher when the input is overdriven, see the applications section. Note 4: Rise time is measured from 10% to 90% on a ±500mV output signal while operating on ±15V supplies with RF = 1k, RG = 110Ω and RL = 100Ω. This condition is not the fastest possible, however, it does guarantee the internal capacitances are correct and it makes automatic testing practical. Note 5: AC parameters are 100% tested on the ceramic and plastic DIP packaged parts (J and N suffix) and are sample tested on every lot of the SO packaged parts (S suffix). Note 6: NTSC composite video with an output level of 2V. Note 7: Back to back 6V Zener diodes are connected between pins 2 and 3 for ESD protection. |
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