Datasheet LT5554 (Analog Devices) - 6

LT5554
DC ELECTRICAL CHARACTERISTICS Specifi cations are at TA = 25°C. VCC = 5V, VCCO = 5V, ENB = 3V, MODE = 5V, unless otherwise noted. (Note 3) (Test circuit shown in Figure 16), unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT DEC External Capacitor Charge/Discharge CURRENT
IIH(DEC) DEC Pin Source Current VDEC = 4V 27 50 70 mA IIL(DEC) DEC Pin Sink Current VDEC = 1.8V –70 –38 –14 mA
Mode Input Three-State DC Characteristics
VIL(MODE) MODE Input LOW Voltage for AC-Couple PGx AC-Coupled, STROBE AC-Coupled 0 0.6 V VOPEN(MODE) MODE Input OPEN PGx AC-Coupled, STROBE DC-Coupled 1.7 OPEN 2.3 V VIH(MODE) MODE Input HIGH Voltage PGx DC-Coupled, STROBE DC-Coupled VCC – 0.4 VCC V IIL(MODE) MODE Input Current VMODE = 0V –42 –31 –23 μA IIH(MODE) MODE Input Current VMODE = 5V 43 72 100 μA
PGx (MODE = VCC) and STROBE (MODE = OPEN or MODE = VCC) INPUTS for DC-Coupled
VIL Input LOW Voltage 0.6 V VIH Input HIGH Voltage 2.2 V IIL(DC) Input Current VIN = 0.6V 30 μA IIH(DC) Input Current VIN = 5V 125 170 220 μA
PGx (MODE = 0V or MODE = OPEN) and STROBE (MODE = 0V) INPUTS for AC-Coupled
VIN(AC) Input Pulse Range Instantaneous Input Voltage 0 4.6 V VIN(AC)P-P Input Pulse Amplitude Rise and Fall Time <5ns 600 mVP-P Rise and Fall Time >80ns 300 mVP-P VIN(AC)MAX Maximum Input Noise Amplitude No LT5554 Gain Update 100 mVP-P IIL(AC) Input Current VIN = 0V –210 –155 –100 μA IIH(AC) Input Current VIN = 5V 310 420 530 μA
Amplifi er DC Characteristics
VIN(DEC) DEC GMAX 1.85 2 2.25 V VIN(BIAS) IN+, IN– Bias Voltage GMAX 1.8 2.04 2.2 V RIN INPUT Differential Resistance GMAX 48 Ω GMIN 50 Ω GM Amplifi er Transconductance GMAX 0.15 S IODC OUT+, OUT– Quiescent Current VOUT = 5V 33 47 57 mA IOUT(OFFSET) Output Current Mismatch IN+, IN– Open 200 μA ICC VCC Supply Current GMAX, MODE = 0V 78 110 132 mA GMIN, MODE = 0V 77 109 131 mA GMAX, MODE = 5V 75 106 127 mA GMIN, MODE = 5V 75 106 127 mA ICC(TOTAL) Total Supply Current ICC + 2 • IODC (GMAX) 200 mA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings load resistance as seen at OUT+, OUT– pins. may cause permanent damage to the device. Exposure to any Absolute All dBm fi gures are with respect to 50Ω. Specifi cations refer to differential Maximum Rating condition for extended periods may affect device inputs and differential outputs. reliability and lifetime.
Note 4:
An external power supply equal to VCCO is used for choke
Note 2
: All voltage values are with respect to GND ground. inductors or center-tap transformer output interfaces. Whenever OUT+,
Note 3
: RS = RIN = 50Ω Input matching is assumed. PIN is the available OUT– pins are biased via resistors, the voltage drop produced by the DC- input power. POUT is the power into ROUT. ROUT = RO || RLOAD is the total output current (IODC = 45mA typical) may require a larger output external output resistance at amplifi er open-collectors outputs (used in GV, GP gain power supply. However, care must be taken not to exceed the OUT+, calculation). RO = 400Ω is LT5554 internal output impedance. RLOAD is OUT– absolute maximum rating when the LT5554 is disabled. 5554f 6