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LT1251 Datasheet(PDF) 4 Page - Linear Technology |
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LT1251 Datasheet(HTML) 4 Page - Linear Technology |
4 / 24 page 4 LT1251/LT1256 SIG AL A PLIFIER DC CHARACTERISTICS 0 °C ≤ TA ≤ 70°C, VS = ±5V, VCM = 0V, VFS = 2.5V, IC = IFS = NULL = Open, Pins 5,10 = GND, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS AVOL Large-Signal Voltage Gain VO = – 3V to 3V, RL = 150Ω 83 93 dB VO = – 2.75V to 2.75V, RL = 150Ω q 83 dB ROL Transresistance, ∆VOUT/∆IIN– VO = – 3V to 3V, RL = 150Ω 0.75 1.8 M Ω VO = – 2.75V to 2.75V, RL = 150Ω q 0.75 M Ω VOUT Maximum Output Voltage Swing No Load q ±4.0 ±4.2 V RL = 150Ω ±3.0 ±3.5 V q ±2.75 V VS = ±15V, No Load q ±14.0 ±14.2 V VS = 5V, VCM = 2.5V, (Note 6) q 1.2 3.8 V IO Maximum Output Current VS = ±5V q ±30 ±40 mA VS = 5V, VCM = VO = 2.5V q ±20 ±30 mA IS Supply Current VC = VFS = 2.5V q 13.5 17.0 mA VC = VFS = 1.25V q 7.5 9.5 mA VC = VFS = 0V q 1.3 1.8 mA VC = VFS = 2.5V, VS = ±15V q 14.5 18.5 mA VC = VFS = 0V, VS = ±15V q 1.4 2.0 mA CO TROL A D FULL SCALE A PLIFIER CHARACTERISTICS 0 °C ≤ TA ≤ 70°C, VS = ±5V, VFS = 2.5V, IC = IFS = NULL = Open, Pins 5,10 = GND, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Control Amplifier Input Offset Voltage Pin 4 to Pin 3 q 515 mV Full-Scale Amplifier Input Offset Voltage Pin 11 to Pin 12 q 515 mV Control Amplifier Input Resistance q 25 100 M Ω Full-Scale Amplifier Input Resistance q 25 100 M Ω Control Amplifier Input Bias Current q – 750 – 300 nA Full-Scale Amplifier Input Bias Current q – 750 – 300 nA RC Internal Control Resistor TA = 25°C 3.75 5 6.25 k Ω RFS Internal Full-Scale Resistor TA = 25°C 456 k Ω Resistor Temperature Coefficient 0.2 %/ °C Control Path Bandwidth Small Signal, VC = 100mV, (Note 7) 10 MHz Control Path Rise and Fall Time Small Signal, VC = 100mV, (Note 7) 35 ns Control Path Transition Time 0% to 100% 150 ns Control Path Propagation Delay Small Signal, ∆VC = 100mV 50 ns VC from 0% or 100% 90 ns The q denotes specifications which apply over the specified operating temperature range. Note 1: A heat sink may be required depending on the power supply voltage. Note 2: Commercial grade parts are designed to operate over the temperature range of – 40 °C to 85°C but are neither tested nor guaranteed beyond 0 °C to 70°C. Industrial grade parts specified and tested over –40 °C to 85°C are available on special request. Consult factory. Note 3: TJ is calculated from the ambient temperature TA and the power dissipation PD according to the following formulas: LT1251CN/LT1256CN: TJ = TA + (PD • 70°C/W) LT1251CS/LT1256CS: TJ = TA + (PD • 100°C/W) Note 4: Differential gain and phase are measured using a Tektronix TSG120YC/NTSC signal generator and a Tektronix 1780R Video Measurement Set. The resolution of this equipment is 0.1% and 0.1 °. Five identical amplifier stages were cascaded giving an effective resolution of 0.02% and 0.02 °. Note 5: Differential gain and phase are best when the control is set at 0% or 100%. See the Typical Performance Characteristics curves. Note 6: Tested with RL = 150Ω to 2.5V to simulate an AC coupled load. Note 7: Small-signal control path response is measured driving RC (Pin 5) to eliminate peaking caused by stray capacitance on Pin 4. |
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