LT6411
4
6411f
ELECTRICAL CHARACTERISTICS
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TA = 25°C. VCC = 5V, VEE = 0V, AV = 2, No RLOAD, VEN = 0.4V, VDGND = 0V,
unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
30MHz Signal
HD Second/Third Harmonic Distortion 2VP-P Differential
2VP-P Differential, RL = 200Ω Differential
–77
–64
dBc
dBc
IMD330M Third-Order IMD 2VP-P Differential Composite, f1 = 29.5MHz,
Differential, f2 = 30.5MHz
–87 dBc
2VP-P Differential Composite, f1 = 29.5MHz,
f2 = 30.5MHz, RL = 200Ω Differential
–75 dBc
OIP330M Output Third-Order Intercept Differential, f1 = 29.5MHz, f2 = 30.5MHz (Note 10) 46.5 dBm
NF Noise Figure Single Ended 24.6 dB
en30M Input Referred Noise Voltage Density 7.6 nV/√Hz
P1dB 1dB Compression Point (Note 10) 19.5 dBm
70MHz Signal
HD Second/Third Harmonic Distortion 2VP-P Differential
2VP-P Differential, RL = 200Ω Differential
–63
–52
dBc
dBc
IMD370M Third-Order IMD 2VP-P Differential Composite, f1 = 69.5MHz,
Differential, f2 = 70.5MHz
–83 dBc
2VP-P Differential Composite, f1 = 69.5MHz,
f2 = 70.5MHz, RL = 200Ω Differential
–64 dBc
OIP370M Output Third-Order Intercept Differential, f1 = 69.5MHz, f2 = 70.5MHz (Note 10) 44.5 dBm
NF Noise Figure Single Ended 24.7 dB
en70M Input Referred Noise Voltage Density 7.7 nV/√Hz
P1dB 1dB Compression Point (Note 10) 19.5 dBm
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: This parameter is guaranteed to meet specifi ed performance
through design and characterization. It is not production tested.
Note 3: As long as output current and junction temperature are kept
below the Absolute Maximum Ratings, no damage to the part will occur.
Depending on the supply voltage, a heat sink may be required.
Note 4: The LT6411C is guaranteed functional over the operating
temperature range of –40°C to 85°C.
Note 5: The LT6411C is guaranteed to meet specifi ed performance from
0°C to 70°C. The LT6411C 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 LT6411I is guaranteed to meet
specifi ed performance from –40°C to 85°C.
Note 6: The two supply voltage settings for power supply rejection
are shifted from the typical ±VS points for ease of testing. The fi rst
measurement is taken at VCC = 3V, VEE = –1.5V to provide the required 3V
headroom for the enable circuitry to function with EN, DGND and all inputs
connected to 0V. The second measurement is taken at VCC = 8V, VEE = –4V.
Note 7: Full power bandwidth is calculated from the slew rate:
FPBW = SR/(π • V
P-P)
Note 8: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R video
measurement set. The resolution of this equipment is better than 0.05%
and 0.05°. Ten identical amplifi er stages were cascaded giving an effective
resolution of better than 0.005% and 0.005°.
Note 9: Slew rate is 100% production tested on channel 1. Slew rate of
channel 2 is guaranteed through design and characterization.
Note 10: Since the LT6411 is a feedback amplifi er 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
LT6411 with typical gm amplifi ers that require 50Ω output loading, the
LT6411 output voltage swing driving an ADC is converted to OIP3 and
P1dB as if it were driving a 50Ω load.