LTC6412
7
6412fa
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. RF input power rating is guaranteed by design and
engineering characterization, but not production tested. The absolute
maximum continuous RF input power shall not exceed +15dBm
Note 2: The LTC6412C/LTC6412I are guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 3: The LTC6412C is guaranteed to meet specifi ed performance from
0°C to 70°C. It is designed, characterized and expected to meet specifi ed
performance from –40°C and 85°C but is not tested or QA sampled
at these temperatures. The LT6412I is guaranteed to meet specifi ed
performance from –40°C to 85°C.
Note 4: Power gain is defi ned at Z
SOURCE
= 50Ω and Z
LOAD
= 200Ω.
Voltage gain for this test condition is 6dB higher than the stated power
gain.
Note 5: e
n
can be calculated from 50Ω NF with the formula:
e
n
= √{4kT(50)(10
NF/10
– 1)}
where
e
n
= Input referred voltage noise in V/√Hz
NF = 50Ω noise fi gure in dB
k = Boltzmann’s constant = 1.38 • 10
–23
J/°K
T = Absolute temperature in °K = °C + 273
Note 6: P1dB compression of the output amplifi er cannot be achieved
in the minimum gain state while complying with the absolute maximum
rating for input RF power.
AC ELECTRICAL CHARACTERISTICS
The l denotes specifi cations that apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. Typical AC electrical performance measured in demo board DC1464A
(Figure 3, Test Circuit A) unless otherwise noted. Default operating conditions are V
CC
= 3.3V, EN = 0.8V, SHDN = 2.2V, +V
G
tied to V
REF
(negative gain slope mode), and Z
SOURCE
= Z
LOAD
= 50Ω unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
380MHz Signal
G
MAX
Maximum Gain –V
G
= 0V, Test Circuit B 17 dB
G
MIN
Minimum Gain –V
G
= 1.2V, Test Circuit B –14 dB
G
RANGE
Gain Range G
MAX
-G
MIN
31 dB
IM3 Third-Order Intermodulation f
1
= 379.5MHz, f
2
= 380.5MHz,
P
OUT
= –6dBm/Tone, –V
G
= 0V to 1.0V
–72 dBc
OIP3 Output Third-Order Intercept f
1
= 379.5MHz, f
2
= 380.5MHz,
P
OUT
= –6dBm/Tone, –V
G
= 0V to 1.0V
30 dBm
P1dB
GMAX
Output 1dB Compression Point at Max Gain –V
G
= 0V (Note 6) 11 dBm
NF
GMAX
Noise Figure at Maximum Gain –V
G
= 0V (Note 5) 10.5 dB
NF
GMIN
Noise Figure at Minimum Gain –V
G
= 1.2V (Note 5) 42 dB
