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Linear Technology Electronic Components Datasheet

LTC5531 Datasheet

Precision 300MHz to 7GHz RF Detector

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LTC5531 pdf
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LTC5531
Precision 300MHz to 7GHz
RF Detector with Shutdown
and Offset Adjustment
FEATURES
s Temperature Compensated Internal Schottky
Diode RF Detector
s Wide Input Frequency Range: 300MHz to 7GHz*
s Wide Input Power Range: –32dBm to 10dBm
s Buffered Detector Output
s Precision VOUT Offset Control
s Wide VCC Range of 2.7V to 6V
s Low Operating Current: 500µA
s Low Shutdown Current: <2µA
s Available in a Low Profile (1mm) SOT-23 Package
U
APPLICATIO S
s 802.11a, 802.11b, 802.11g, 802.15, 802.16
s Multimode Mobile Phone Products
s Optical Data Links
s Wireless Data Modems
s Wireless and Cable Infrastructure
s RF Power Alarm
s Envelope Detector
DESCRIPTIO
The LTC®5531 is an RF power detector for RF applications
operating in the 300MHz to 7GHz range. A temperature
compensated Schottky diode peak detector and buffer
amplifier are combined in a small ThinSOTTM package. The
supply voltage range is optimized for operation from a
single lithium-ion cell or 3xNiMH.
The RF input voltage is peak detected using an on-chip
Schottky diode. The detected voltage is buffered and
supplied to the VOUT pin. A power saving shutdown mode
reduces current to less than 2µA. The initial offset voltage
of 120mV ±35mV can be precisely adjusted using the
VOS pin.
The LTC5531 operates with input power levels from
–32dBm to 10dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
*Higher frequency operation is achievable with reduced performance. Consult factory for more
information.
TYPICAL APPLICATIO
300MHz to 7GHz RF Power Detector
RF
INPUT
33pF
1
LTC5531
RFIN
VCC
6
2
GND
5
VOUT
100pF
3
DISABLE ENABLE SHDN
VOS
4
VOS
REFERENCE
5531 TA01
VCC
0.1µF
VOUT Output Voltage vs RF Input Power
3600
VOS = 0V
3200 VCC = 3.6V
TA = 25°C
2800
2400
2000
2000MHz
1000MHz
4000MHz
3000MHz
1600
1200
300MHz
800 5000MHz
6000MHz
400 7000MHz
0
–30 –26 –22 –18 –14 –10 –6 –2 2
RF INPUT POWER (dBm)
6 10
5531 TA02
5531f
1


Linear Technology Electronic Components Datasheet

LTC5531 Datasheet

Precision 300MHz to 7GHz RF Detector

No Preview Available !

LTC5531 pdf
LTC5531www.DataSheet4U.com
ABSOLUTE AXI U RATI GS
(Note 1)
VCC, VOUT, SHDN, VOS .................................... –0.3V to 6.5V
RFIN Voltage ......................................(VCC ± 1.5V) to 7V
RFIN Power (RMS) .............................................. 12dBm
IVOUT ...................................................................... 5mA
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Maximum Junction Temperature ......................... 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RFIN 1
GND 2
SHDN 3
6 VCC
5 VOUT
4 VOS
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 125°C, θJA = 250°C/W
ORDER PART
NUMBER
LTC5531ES6
S6 PART
MARKING
LTBBQ
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 3.6V, SHDN = VCC = HI, SHDN = 0V = LO, RF Input Signal is Off,
VOS = 0V and SHDN = HI unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP
MAX UNITS
VCC Operating Voltage
IVCC Operating Current
IVCC Shutdown Current
VOUT (No RF Input)
IVOUT = 0mA
SHDN = LO
RLOAD = 2k, VOS = 0V
SHDN = LO
q 2.7
6
q 0.5 0.7
q 0.01 2
q 85 100 to 140 155
1
V
mA
µA
mV
mV
VOUT Output Current
VOUT Enable Time
VOUT Bandwidth
VOUT Load Capacitance
VOUT Slew Rate
VOUT Noise
VOS Voltage Range
VOS Input Current
SHDN Voltage, Chip Disabled
SHDN Voltage, Chip Enabled
SHDN Input Current
VOUT = 1.75V, VCC = 2.7V, VOUT < 10mV
SHDN = LO to HI, CLOAD = 33pF, RLOAD = 2k
CLOAD = 33pF, RLOAD = 2k (Note 4)
(Notes 6, 7)
VRFIN = 1V Step, CLOAD = 33pF, RLOAD = 2k (Note 3)
VCC = 3V, Noise BW = 1.5MHz, 50RF Input Termination
VCC = 2.7V to 6V
VCC = 2.7V to 6V
SHDN = 3.6V
q2
q
q
q0
q –0.5
q
q 1.4
q
4
8
2
3
1
22
mA
20 µs
MHz
33 pF
V/µs
mVP-P
1V
0.5 µA
0.35 V
V
36 µA
RFIN Input Frequency Range
RFIN Input Power Range
RFIN AC Input Resistance
RFIN Input Shunt Capacitance
(Note 8)
RF Frequency = 300MHz to 7GHz (Note 5, 6) VCC = 2.7V to 6V
F = 1000MHz, Pin = –25dBm
F = 1000MHz, Pin = –25dBm
300 to 7000
–32 to 10
220
0.65
MHz
dBm
pF
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Specifications over the –40°C to 85°C operating temperature
range are assured by design, characterization and correlation with
statistical process controls.
Note 3: The rise time at VOUT is measured between 1.3V and 2.3V.
Note 4: Bandwidth is calculated based on the 10% to 90% rise time
equation: BW = 0.35/rise time.
Note 5: RF performance is tested at 1800MHz
Note 6: Guaranteed by design.
Note 7: Capacitive loading greater than this value may result in circuit
instability.
Note 8: Higher frequency operation is achievable with reduced
performance. Consult factory for more information.
5531f
2


Part Number LTC5531
Description Precision 300MHz to 7GHz RF Detector
Maker Linear Technology
Total Page 12 Pages
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