Datasheet LT6402-20 (Analog Devices) - 5

LT6402-20
AC ELECTRICAL CHARACTERISTICS TA = 25°C, VCCA = VCCB = VCCC = 5V,VEEA = VEEB = VEEC = 0V,
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E = 0.8V, +INA shorted to +INB (+IN), –INA shorted to –INB (–IN), VOCM = 2.2V, Input common mode voltage = 2.2V, no RLOAD unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS 25MHz Signal
Second/Third Harmonic Distortion 2VP-P Differential (+OUTFILTERED, –OUTFILTERED) –80 dBc 2VP-P Differential (+OUT, –OUT) –80 dBc Third-Order IMD 2VP-P Differential Composite (+OUTFILTERED, –86 dBc –OUTFILTERED), f1 = 24.5MHz, f2 = 25.5MHz 2VP-P Differential Composite (+OUT, –OUT), –84 dBc RL = 400Ω, f1 = 24.5MHz, f2 = 25.5MHz OIP325M Output Third-Order Intercept Differential (+OUTFILTERED, –OUTFILTERED), 46 dBm f1 = 24.5MHz, f2 = 25.5MHz (Note 5) NF Noise Figure Measured Using DC954A Demo Board 12.5 dB en25M Input Referred Noise Voltage Density 1.9 nV/√Hz 1dB Compression Point RL = 100Ω (Note 5) 16.6 dBm
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
The LT6402C is guaranteed to meet specifi ed performance from may cause permanent damage to the device. Exposure to any Absolute 0°C to 70°C. It is designed, characterized and expected to meet specifi ed Maximum Rating condition for extended periods may affect device performance from –40°C and 85°C but is not tested or QA sampled reliability and lifetime. at these temperatures. The LT6402I is guaranteed to meet specifi ed
Note 2:
As long as output current and junction temperature are kept below performance from –40°C to 85°C. the Absolute Maximum Ratings, no damage to the part will occur.
Note 5:
Since the LT6402-20 is a feedback amplifi er with low output
Note 3:
The LT6402 is guaranteed functional over the operating impedance, a resistive load is not required when driving an ADC. temperature range of –40°C to 85°C. Therefore, typical output power is very small. In order to compare the LT6402-20 with typical gm amplifi ers that require 50Ω output loading, the LT6402-20 output voltage swing driving an ADC is converted to OIP3 and P1dB as if it were driving a 50Ω load.
TYPICAL PERFORMANCE CHARACTERISTICS Frequency Response Frequency Response vs Frequency Response RLOAD = 400
Ω
C R LOAD, RLOAD = 400
Ω
LOAD = 100
Ω 30 35 30 VIN = 20mVP-P 25 UNFILTERED OUTPUTS 30 25 UNFILTERED UNFILTERED 20 20 25 15 FILTERED 15 20 FILTERED 10 10 GAIN (dB) GAIN (dB) 15 GAIN (dB) 5 5 10 0 0 VIN = 20mVP-P 0pF VIN = 20mVP-P UNFILTERED: R 1.6pF UNFILTERED: R –5 LOAD = 400Ω 5 –5 LOAD = 100Ω FILTERED: RLOAD = 300Ω (EXTERNAL) 5pF FILTERED: RLOAD = 100Ω + 100Ω (INTERNAL, FILTERED OUTPUTS) 10pF (INTERNAL, FILTERED OUTPUTS) –10 0 –10 1 10 100 1000 1 10 100 1000 1 10 100 1000 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) 64022 G01 34022 G02 64022 G03 640220fa 5