5
64026fa
LT6402-6
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: As long as output current and junction temperature are kept below
the Absolute Maximum Ratings, no damage to the part will occur.
Note 3: The LT6402 is guaranteed functional over the operating
temperature range of –40°C to 85°C.
Note 4: The LT6402C is guaranteed to meet specied performance from
0°C to 70°C. It is designed, characterized and expected to meet specied
performance from –40°C and 85°C but is not tested or QA sampled
at these temperatures. The LT6402I is guaranteed to meet specied
performance from –40°C to 85°C.
Note 5: Since the LT6402-6 is a feedback amplier with low output
impedance, a resistive load is not required when driving an ADC.
Therefore, typical output power is very small. In order to compare the
LT6402-6 with typical gm ampliers that require 50Ω output loading, the
LT6402-6 output voltage swing driving an ADC is converted to OIP3 and
P1dB as if it were driving a 50Ω load.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
25MHz Signal
Second/Third Harmonic Distortion
2VP-P Differential (+OUTFILTERED, –OUTFILTERED)
–84
dBc
2VP-P Differential (+OUT, –OUT)
–69
dBc
Third-Order IMD
2VP-P Differential Composite (+OUTFILTERED,
–OUTFILTERED), f1 = 24.5MHz, f2 = 25.5MHz
–88
dBc
2VP-P Differential Composite (+OUT, –OUT),
RL = 400Ω, f1 = 24.5MHz, f2 = 25.5MHz
–67
dBc
OIP325M
Output Third-Order Intercept
Differential (+OUTFILTERED, –OUTFILTERED),
f1 = 24.5MHz, f2 = 25.5MHz (Note 5)
47
dBm
NF
Noise Figure
Measured Using DC954A Demo Board
12.6
dB
en25M
Input Referred Noise Voltage Density
3.9
nV/√Hz
1dB Compression Point
RL = 100Ω (Note 5)
17.2
dBm
TA = 25°C, VCCA = VCCB = VCCC = 5V,VEEA = VEEB = VEEC = 0V,
ENABLE = 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.
Frequency Response,
RLOAD = 400Ω
Frequency Response vs CLOAD,
RLOAD = 400Ω
Frequency Response,
RLOAD = 100Ω
AC ELECTRICAL CHARACTERISTICS
TYPICAL PERFORMANCE CHARACTERISTICS
FREQUENCY (MHz)
1
–5
GAIN
(dB)
5
15
10
100
1000
64026 G01
–15
–10
0
10
–20
–25
UNFILTERED
VIN = 100mVP-P
UNFILTERED: RLOAD = 400Ω
FILTERED: RLOAD = 300Ω
(EXTERNAL) + 100Ω
(INTERNAL, FILTERED OUTPUTS)
FILTERED
FREQUENCY (MHz)
1
0
GAIN
(dB)
5
10
15
20
10
100
1000
64026 G02
–5
–10
–15
–20
25
30
0pF
1.6pF
5pF
10pF
FREQUENCY (MHz)
1
–3
GAIN
(dB)
0
3
6
9
10
100
1000
64026 G03
–6
–9
–12
–15
–18
–21
–24
–27
–30
12
15
UNFILTERED OUTPUTS
FILTERED OUTPUTS
VIN = 100mVP-P
UNFILTERED: RLOAD = 100Ω
FILTERED: RLOAD = 100Ω
(INTERNAL, FILTERED OUTPUTS)