LTC6400-14_15 Datasheet, PDF (6/16 Pages) Linear Technology – 2.4GHz Low Noise, Low Distortion Differential ADC Driver for 300MHz IF

LTC6400-14
AC ELECTRICAL CHARACTERISTICS _{ENABLE = 0V, No RL unless otherwise noted.}
Specifications are at T_A = 25°C. V⁺ = 3V, V^– = 0V, V_OCM = 1.25V,
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
300MHz Input Signal
HD2,300M/HD3,300M Second/ Third-Order Harmonic
Distortion
2V_{P-P, OUT}, R_L = 200Ω
2V_{P-P, OUT}, No R_L
– 61/–51
dBc
– 61/–55
dBc
IMD3,300M
OIP3,300M
Third-Order Intermodulation
(f1 = 299.5MHz f2 = 300.5MHz)
Third-Order Output Intercept Point
(f1 = 299.5MHz f2 = 300.5MHz)
2V_{P-P, OUT} Composite, R_L = 200Ω
2V_{P-P, OUT} Composite, No R_L
2V_{P-P, OUT} Composite, No R_L (Note 7)
– 62
dBc
– 66
dBc
36.9
dBm
P1dB,300M
NF300M
e_{N, 300M}
e_{ON, 300M}
1dB Compression Point
Noise Figure
Input Referred Voltage Noise Density
R_L = 375Ω (Notes 5, 7)
R_L = 375Ω (Note 5)
Includes Resistors (Short Inputs)
Output Referred Voltage Noise Density Includes Resistors (Short Inputs)
17.4
dBm
8.2
dB
2.5
nV/√Hz
13.9
nV/√Hz
IMD3,280M/320M
Third-Order Intermodulation
(f1 = 280MHz f2 = 320MHz)
Measured at 360MHz
2V_{P-P, OUT} Composite, R_L = 375Ω
– 63
– 55
dBc
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Input pins (+IN, –IN) are protected by steering diodes to either
supply. If the inputs go beyond either supply rail, the input current should
be limited to less than 10mA.
Note 3: The LTC6400C and LTC6400I are guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 4: The LTC6400C is guaranteed to meet specified performance from
0°C to 70°C. It is designed, characterized and expected to meet specified
performance from –40 to 85°C but is not tested or QA sampled at these
temperatures. The LTC6400I is guaranteed to meet specified performance
from –40°C to 85°C.
Note 5: Input and output baluns used. See Test Circuit A.
Note 6: Measured using Test Circuit B.
Note 7: Since the LTC6400-14 is a feedback amplifier with low output
impedance, a resistive load is not required when driving an AD converter.
Therefore, typical output power is very small. In order to compare the
LTC6400-14 with amplifiers that require 50Ω output load, the LTC6400-14
output voltage swing driving a given R_L is converted to OIP3 and P_1dB as
if it were driving a 50Ω load. Using this modified convention, 2V_P-P is by
definition equal to 10dBm, regardless of actual R_L.
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