Datasheet LT1251, LT1256 (Analog Devices) - 4

LT1251/LT1256
U W 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 ● 83 dB R – OL Transresistance, ∆VOUT/∆IIN VO = – 3V to 3V, RL = 150Ω 0.75 1.8 MΩ VO = – 2.75V to 2.75V, RL = 150Ω ● 0.75 MΩ VOUT Maximum Output Voltage Swing No Load ● ±4.0 ±4.2 V RL = 150Ω ±3.0 ±3.5 V ● ±2.75 V VS = ±15V, No Load ● ±14.0 ±14.2 V VS = 5V, VCM = 2.5V, (Note 6) ● 1.2 3.8 V IO Maximum Output Current VS = ±5V ● ±30 ±40 mA VS = 5V, VCM = VO = 2.5V ● ±20 ±30 mA IS Supply Current VC = VFS = 2.5V ● 13.5 17.0 mA VC = VFS = 1.25V ● 7.5 9.5 mA VC = VFS = 0V ● 1.3 1.8 mA VC = VFS = 2.5V, VS = ±15V ● 14.5 18.5 mA VC = VFS = 0V, VS = ±15V ● 1.4 2.0 mA
U U W 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 ● 5 15 mV Full-Scale Amplifier Input Offset Voltage Pin 11 to Pin 12 ● 5 15 mV Control Amplifier Input Resistance ● 25 100 MΩ Full-Scale Amplifier Input Resistance ● 25 100 MΩ Control Amplifier Input Bias Current ● – 750 – 300 nA Full-Scale Amplifier Input Bias Current ● – 750 – 300 nA RC Internal Control Resistor TA = 25°C 3.75 5 6.25 kΩ RFS Internal Full-Scale Resistor TA = 25°C 4 5 6 kΩ 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 ● denotes specifications which apply over the specified operating
Note 4:
Differential gain and phase are measured using a Tektronix temperature range. TSG120YC/NTSC signal generator and a Tektronix 1780R Video
Note 1:
A heat sink may be required depending on the power supply Measurement Set. The resolution of this equipment is 0.1% and 0.1°. Five voltage. identical amplifier stages were cascaded giving an effective resolution of
Note 2:
Commercial grade parts are designed to operate over the 0.02% and 0.02°. temperature range of – 40°C to 85°C but are neither tested nor guaranteed
Note 5:
Differential gain and phase are best when the control is set at 0% beyond 0°C to 70°C. Industrial grade parts specified and tested over or 100%. See the Typical Performance Characteristics curves. – 40°C to 85°C are available on special request. Consult factory.
Note 6:
Tested with RL = 150Ω to 2.5V to simulate an AC coupled load.
Note 3:
TJ is calculated from the ambient temperature TA and the power
Note 7:
Small-signal control path response is measured driving RC (Pin 5) dissipation PD according to the following formulas: to eliminate peaking caused by stray capacitance on Pin 4. LT1251CN/LT1256CN: TJ = TA + (PD • 70°C/W) LT1251CS/LT1256CS: TJ = TA + (PD • 100°C/W) 4