參數(shù)資料
型號： LT5514
廠商： Linear Technology Corporation
元件分類： ADC
英文描述： Ultralow Distortion IF Amplifier/ADC Driver with Digitally Controlled Gain
中文描述： 超低失真IF放大器/ ADC的數(shù)字控制增益驅(qū)動(dòng)
文件頁數(shù)： 5/20頁
文件大小： 275K
代理商： LT5514
5
LT5514
5514f
(Low Power Mode)
V
CC
= 5V, V
CCO
= 5V, ENA = 3V, ENB = 0.6V, T
A
= 25
°
C, R
OUT
= 200
. Maximum gain specifications are with respect to differential
inputs and differential outputs, unless otherwise noted. (Note 7) (Test circuits shown in Figures 9 and 10)
AC ELECTRICAL CHARACTERISTICS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2:
All voltage values are with respect to ground.
Note 3:
Default state for open PGA inputs.
Note 4:
V
CC1
and V
CC2
(Pins 2 and 19) are internally connected.
Note 5:
External V
OSUP
is adjusted such that V
CCO
output pin common
mode voltage is as specified when resistors are used. For choke inductors
or transformer, V
OSUP
= V
CCO
= 5V typ.
Note 6:
Internally generated common mode input bias voltage requires
capacitive or transformer coupling to the signal source.
Note 7:
Specifications over the –40
°
C to 85
°
C operating temperature
range are assured by design, characterization and correlation with
statistical process controls. Gain always refers to power gain. Input
matching is assumed. P
IN
is the available input power. P
OUT
is the power
into the external load, R
OUT
, as seen by the LT5514 differential outputs. All
dBm figures are with respect to 50
.
Note 8:
High frequency operation is limited by the RC time constants at
the input and output ports. The low frequency (LF) roll-off is set by I/O
interface choice.
Note 9:
Limited by package and board isolation.
Note 10:
See “Clipping Free Operation” in the Applications Information
section. Refer to Figure 7.
SYMBOL
Dynamic Performance
BW
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Large-Signal –3dB Bandwidth
All Gain Settings (Note 8),
R
OUT
= 100
All Gain Settings, Single Tone,
f
IN
= 100MHz (Note 10)
Max Gain, f
IN
= 100MHz
f
IN
= 100MHz (Note 9)
LF to 540
16
MHz
dBm
P
OUT(MAX)
Clipping Limited Maximum Sinusoidal
Output Power
Amplifier Transconductance
Reverse Isolation
Distortion and Noise
OIP3
Output Third Order Intercept Point for
PGA0 = High (PGA1, PGA2, PGA3 Any State)
Output Third Order Intercept Point for
PGA0 = Low (PGA1, PGA2, PGA3 Any State)
HD2
Second Harmonic Distortion
HD3
Third Harmonic Distortion
N
FLOOR
Output Noise Floor
(PGAO, PGA2, PGA3 Any State)
NF
Noise Figure
Amplifier Power Gain and Gain Step
G
MAX
Maximum Gain
G
MIN
Minimum Gain
G
STEP
Gain Step Size
Gain Step Accuracy
Amplifier I/O Impedance
R
IN
Input Resistance
g
m
S12
0.15
–92
S
dB
P
OUT
= 4dBm (Each Tone), 200kHz Tone Spacing,
f
IN
= 100MHz
P
OUT
= 4dBm (Each Tone), 200kHz Tone Spacing,
f
IN
= 100MHz
P
OUT
= 5dBm (Single Tone), f
IN
= 50MHz
P
OUT
= 5dBm (Single Tone), f
IN
= 50MHz
PGA1 = High, f
IN
= 100MHz
PGA1 = Low, f
IN
= 100MHz
Max Gain Setting, f
IN
= 100MHz
+40
dBm
+36
–76
–72
–138
–140
8.6
dBm
dBc
dBc
dBm/Hz
dBm/Hz
dB
f
IN
= 20MHz and 200MHz
f
IN
= 20MHz and 200MHz
f
IN
= 20MHz and 200MHz
f
IN
= 20MHz and 200MHz
27
4.5
1.5
±
0.1
dB
dB
dB
dB
1.05
1.95
f
IN
= 100MHz, Parallel Values Specified
Differentially
f
IN
= 100MHz, Parallel Values Specified
Differentially
f
IN
= 100MHz, Parallel Values Specified
Differentially
f
IN
= 100MHz, Parallel Values Specified
Differentially
122
C
IN
Input Capacitance
2
pF
R
O
Output Resistance
5
k
C
O
Output Capacitance
1.7
pF
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