参数资料
型号: LTC6420IUDC-20#PBF
厂商: Linear Technology
文件页数: 9/14页
文件大小: 0K
描述: IC DIFF AMP/ADC DRIVER DL 20QFN
标准包装: 91
类型: ADC 驱动器
应用: 数据采集
安装类型: 表面贴装
封装/外壳: 20-WFQFN 裸露焊盘
供应商设备封装: 20-QFN(3x4)
包装: 管件
LTC6420-20
4
642020fb
AC ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. V+ = 3V, V= 0V, VOCM = 1.25V, ENABLE = 0V, No RL unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ΔG
Gain Matching
f = 100MHz (Note 9)
l
±0.1
±0.25
dB
ΔP
Phase Matching
f = 100MHz
±0.1
deg
Channel Separation (Note 8)
f = 100MHz
80
dB
–3dBBW
–3dB Bandwidth
200mVP-P,OUT (Note 6)
1.8
GHz
0.5dBBW
Bandwidth for 0.5dB Flatness
200mVP-P,OUT (Note 6)
0.7
GHz
0.1dBBW
Bandwidth for 0.1dB Flatness
200mVP-P,OUT (Note 6)
0.3
GHz
NF
Noise Figure
RL = 375Ω (Note 5), f = 100MHz
6.2
dB
eIN
Input Referred Voltage Noise Density
Includes Resistors (Short Inputs), f = 100MHz
2.2
nV/√Hz
eON
Output Referred Voltage Noise Density Includes Resistors (Short Inputs), f = 100MHz
22
nV/√Hz
1/f
1/f Noise Corner
10
kHz
SR
Slew Rate
Differential (Note 6)
4500
V/μs
tS1%
1% Settling Time
2VP-P,OUT (Note 6)
0.8
ns
tOVDR
Overdrive Recovery Time
1.9VP-P,OUT (Note 6): Single Ended
4
ns
P1dB
1dB Compression Point
RL = 375Ω (Notes 5, 7), f = 100MHz
18
dBm
tON
Turn-On Time
+OUT, –OUT Within 10% of Final Values
82
ns
tOFF
Turn-Off Time
ICC Falls to 10% of Nominal
190
ns
–3dBBWVOCM VOCM Pin Small Signal –3dB BW
0.1VP-P at VOCM, Measured Single-Ended at
Output (Note 6)
15
MHz
IMD3
3rd Order Intermodulation Distortion
f = 100MHz (1MHz Spacing)
VOUT = 2VP-P Composite
–84
dBc
OIP3
3rd Order Output Intercept
f = 100MHz (Note 7)
46
dBm
IIP3
3rd Order Input Intercept
f = 100MHz (ZIN = 50Ω)
f = 100MHz (ZIN = 200Ω)
26
20
dBm
HD2
2nd Order Harmonic Distortion
f = 100MHz; VOUT = 2VP-P
–80
dBc
HD3
3rd Order Harmonic Distortion
f = 100MHz; VOUT = 2VP-P
–88
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 LTC6420C and LTC6420I are guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 4: The LTC6420C 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 to 85°C but is not tested or QA sampled at these
temperatures. The LTC6420I is guaranteed to meet specied 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. RL = 87.5Ω on each output.
Note 7: Since the LTC6420-20 is a feedback amplier 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
LTC6420-20 with ampliers that require 50Ω output load, the output
voltage swing driving a given RL is converted to OIP3 and P1dB as if it were
driving a 50Ω load. Using this modied convention, 2VP-P is by denition
equal to 10dBm, regardless of actual RL.
Note 8: Channel separation (the inverse of crosstalk) is measured by
driving a signal into one input, while terminating the other input. Channel
separation is the ratio of the resulting output signal at the driven channel
to the channel that is not driven.
Note 9: Not production tested. Guaranteed by design and by correlation to
production tested parameters.
Note 10: The output swing range is at least 2VP-P differential even when
sourcing or sinking 20mA. Tested at VOCM = 1.5V.
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