LTC5582IDD View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC5582IDD' PDF : 16 Pages View PDF
LTC5582
Typical Performance Characteristics VCC = 3.3V, EN = 3.3V, TA = 25°C unless otherwise
noted. Test circuits shown in Figure 1.
Output Transient Response,
C3 = 1µF
4.8
RF PULSE ON
4.4
fRF = 100MHz
4.0
3.6
3.2 RF PULSE OFF
2.8
2.4
2.0
1.6
RF PULSE OFF
PIN = 0dBm
PIN = –10dBm
PIN = –20dBm
PIN = –30dBm
PIN = –40dBm
PIN = –50dBm
1.2
0.8
0.4
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
TIME (ms)
5582 G26
Supply Current vs RF Input Power
60
TA = 85°C
55
TA = 25°C
TA = –40°C
50
45
40
35
30
25
20
–65
–55 –45 –35 –25 –15
RF INPUT POWER (dBm)
–5 5
5582 G28
RF Input Return Loss vs
Frequency
0
–5
–10
–15
–20
–25
0
1
2
3
4
5
6
FREQUENCY (GHz)
5582 G22
Pin Functions
VCC (Pin 1): Power Supply Pin. Typical current consump-
tion is 41.6mA at room temperature. This pin should be
externally bypassed with 1nF and 1µF chip capacitors.
IN+, IN– (Pins 2, 4): Differential Input Signal Pins. Either
one can be driven with a single-ended signal while the
other is AC-coupled to ground. These pins can also be
driven with a differential signal. The pins are internally
biased to 1.585V and should be DC blocked externally. The
differential impedance is typically 400Ω. The impedance
of each pin to the DEC pin is 200Ω.
DEC (Pin 3): Input Common Mode Decoupling Pin. This
pin is internally biased to 1.585V and connected to an on-
chip 50pF capacitor to ground. The impedance between
DEC and IN+ (or IN–) is 200Ω. The pin can be connected
to the center tap of an external balun when terminated
differentially. The pin can be floating or connected to
ground via an AC-decoupling capacitor when driven either
in single-ended or differential input configuration.
GND (Pin 5, Exposed Pad Pin 11): Circuit Ground Return
for the Entire IC. This must be soldered to the printed
circuit board ground plane.
OUT (Pin 6): DC Output Pin. The output impedance is mainly
determined by an internal 100Ω series resistance which
provides protection if the output is shorted to ground.
RT2 (Pin 7): Optional Control Pin for 2nd-Order Output
Temperature Compensation. Connect this pin to ground to
disable it. The output voltage will decrease with respect to
the room temperature (25°C) by connecting it to ground
via an off-chip resistor when the ambient temperature is
either higher or lower.
RT1 (Pin 8): Optional Control Pin for 1st-Order Output
Temperature Compensation. Connect this pin to ground
to disable it. The output voltage will increase inversely
proportional to ambient temperature.
EN (Pin 9): Enable Pin. An applied voltage above 1V will
activate the bias for the IC. For an applied voltage below
0.4V, the circuits will be shut down (disabled) with a reduc-
tion in power supply current. If the enable function is not
required, then this pin can be connected to VCC. Typical
enable pin input current is 100μA for EN = 3.3V. Note that
at no time should the Enable pin voltage be allowed to
exceed VCC by more than 0.3V.
FLTR (Pin 10): Connection for an External Filtering Capaci-
tor C3. A minimum of 8nF capacitance is required for stable
AC average power measurement. This capacitor should
be connected to VCC.
5582f
Share Link: 
