LTC5532
Precision 300MHz to 7GHz
RF Detector with Gain
and Offset Adjustment
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Temperature Compensated Internal Schottky
Diode RF Detector
Wide Input Frequency Range: 300MHz to 7GHz*
Wide Input Power Range: –32dBm to 10dBm
Buffered Detector Output with External Gain Control
Precision V
OUT
Offset Control
Low Starting Voltage: 120mV
±35mV
for Gain = 2x
Wide V
CC
Range of 2.7V to 6V
Low Operating Current: 500µA
Available in a Low Profile (1mm) SOT-23 Package
and Tiny 6-Lead (2mm
×
2mm) DFN Package
The LTC
®
5532 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 ThinSOT
TM
or (2mm
×
2mm) DFN package. The supply voltage range is opti-
mized for operation from a single lithium-ion cell or 3×
NiMH.
The RF input voltage is peak detected using an on-chip
Schottky diode. The detected voltage is buffered and
supplied to the V
OUT
pin.
The LTC5532 output buffer gain is set via external resis-
tors. The initial starting voltage of 120mV
±35mV
can be
precisely adjusted using the V
OS
pin.
The LTC5532 operates with RF 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.
APPLICATIO S
s
s
s
s
s
s
s
802.11a, 802.11b, 802.11g, 802.15
Multimode Mobile Phone Products
Optical Data Links
Wireless Data Modems
Wireless and Cable Infrastructure
RF Power Alarm
Envelope Detector
TYPICAL APPLICATIO
Output Voltage vs RF Input Power
(SOT-23 Package)
300MHz to 7GHz RF Power Detector
(SOT-23 Package)
33pF
RF
INPUT
1
RF
IN
V
CC
6
100pF
5
R
A
V
OS
V
M
4
R
B
5532 TA01
3600
V
OUT
OUTPUT VOLTAGE (mV)
V
CC
= 3.6V
T
A
= 25°C
3200
GAIN = 2
2800 V
OS
= 0V
2400
2000
1600
1200
800
400
2000MHz
3000MHz
V
CC
0.1µF
LTC5532ES6
2
GND
V
OUT
V
OS
REFERENCE
3
0
–32 –27 –22 –17 –12 –7
–2
RF INPUT POWER (dBm)
U
1000MHz
300MHz
4000MHz
5000MHz
6000MHz
7000MHz
3
8
5532 TA02
U
U
5532f
1
LTC5532
ABSOLUTE
AXI U RATI GS
(Note 1)
Maximum Junction Temperature ......................... 125°C
Storage Temperature Range ................ – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
SOT-23 Only ......................................................... 300°C
V
CC
, V
OUT
, V
M
, V
OS
.................................. –0.3V to 6.5V
RF
IN
Voltage ......................................(V
CC
±
1.5V) to 7V
RF
IN
Power (RMS) ............................................. 12dBm
I
VOUT
...................................................................... 5mA
Operating Temperature Range (Note 2) .. – 40°C to 85°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
CC
1
V
OUT
2
V
M
3
7
6 RF
IN
5 GND
4 V
OS
ORDER PART
NUMBER
LTC5532EDC
DC6 PART MARKING
LAFR
RF
IN
1
GND 2
V
OS
3
DC6 PACKAGE
6-LEAD (2mm
×
2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 85°C/W
EXPOSED PAD (PIN 7) IS GND,
MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.6V, RF Input Signal is Off, R
A
= R
B
= 1k, V
OS
= 0V unless
otherwise noted (Note 2).
PARAMETER
V
CC
Operating Voltage
I
VCC
Operating Current
V
OUT
V
OL
(No RF Input)
V
OUT
Output Current
V
OUT
Bandwidth
V
OUT
Load Capacitance
V
OUT
Slew Rate
V
OUT
Noise
V
OS
Voltage Range
V
OS
Input Current
V
M
Voltage Range
V
M
Input Current
RF
IN
Input Frequency Range
RF
IN
Input Power Range
RF
IN
AC Input Resistance
RF
IN
Input Shunt Capacitance
CONDITIONS
q
ELECTRICAL CHARACTERISTICS
I
VOUT
= 0mA
R
LOAD
= 2k, V
OS
= 0V
V
OUT
= 1.75V, V
CC
= 2.7V,
∆V
OUT
< 10mV
C
LOAD
= 33pF, R
LOAD
= 2k (Note 4)
(Note 6)
V
RFIN
= 1V Step, C
LOAD
= 33pF, Total R
LOAD
= 2k (Note 3)
V
CC
= 3V, Noise BW = 1.5MHz, 50Ω RF Input Termination,
50Ω AC Output Termination
V
OS
= 1V
V
M
= 3.6V
q
(Note 7)
RF Frequency = 300MHz to 7GHz (Note 5, 6) V
CC
= 2.7V to 6V
F = 1000MHz, Pin = –25dBm
F = 1000MHz, Pin = –25dBm
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 V
OUT
is measured between 1.3V and 2.3V.
2
U
U
W
W W
U
W
TOP VIEW
6 V
CC
5 V
OUT
4 V
M
ORDER PART
NUMBER
LTC5532ES6
S6 PART MARKING
LTAFS
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C,
θ
JA
= 250°C/W
MIN
2.7
85
2
TYP
0.5
100 to 140
4
2
3
1
q
q
q
q
MAX
6
0.7
155
33
UNITS
V
mA
mV
mA
MHz
pF
V/µs
mV
P-P
V
µA
V
µA
MHz
dBm
Ω
pF
q
q
q
0
–0.5
0
–0.5
300 to 7000
–32 to 10
220
0.65
1
0.5
V
CC
-1. 8
0.5
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:
Higher frequency operation is achievable with reduced
performance. Consult factory for more information.
5532f
LTC5532
TYPICAL PERFOR A CE CHARACTERISTICS
unless otherwise indicated.
Output Voltage vs Supply Voltage
(RF Input Signal Off)
130
V
OS
= 0V
GAIN = 2
500
V
OUT
OUTPUT VOLTAGE (mV)
SUPPLY CURRENT (µA)
125
T
A
= 85°C
T
A
= 25°C
OUTPUT DELAY (ns)
120
T
A
= –40°C
115
110
2.5
3.0
3.5
5.0
SUPPLY VOLTAGE (V)
4.0
4.5
Typical Detector Characteristics,
300MHz, Gain = 2, V
OS
= 0V
3600
3200
V
OUT
OUTPUT VOLTAGE (mV)
V
OUT
OUTPUT VOLTAGE (mV)
2800
2400
2000
1600
1200
800
400
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
V
CC
= 3.6V
3600
3200
2800
2400
2000
1600
1200
800
400
4
8
V
OUT
OUTPUT VOLTAGE (mV)
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
Typical Detector Characteristics,
3000MHz, Gain = 2, V
OS
= 0V
3600
3200
V
OUT
OUTPUT VOLTAGE (mV)
V
OUT
OUTPUT VOLTAGE (mV)
2800
2400
2000
1600
1200
800
400
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
V
CC
= 3.6V
3600
3200
2800
2400
2000
1600
1200
800
400
8
V
OUT
OUTPUT VOLTAGE (mV)
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
U W
5.5
5532 G01
5532 G04
(R
LOAD
= 20k) Characteristics are for both packages
Supply Current vs Supply Voltage
(RF Input Signal Off)
1000
Output Delay vs RF Input Power
V
CC
= 3.6V
T
A
= 25°C
V
OS
= 0V
GAIN = 2
480
800
T
A
= –40°C
600
460
T
A
= 25°C
T
A
= 85°C
400
90% SWITCHING
440
200
50% SWITCHING
6.0
420
2.5
3.0
3.5
5.0
SUPPLY VOLTAGE (V)
4.0
4.5
5.5
6.0
0
–10
0
–5
5
RF INPUT POWER (dBm)
10
5532 G03
5532 G02
Typical Detector Characteristics,
1000MHz, Gain = 2, V
OS
= 0V
V
CC
= 3.6V
T
A
= –40°C
3600
3200
2800
2400
2000
1600
1200
800
400
4
8
Typical Detector Characteristics,
2000MHz, Gain = 2, V
OS
= 0V
V
CC
= 3.6V
T
A
= –40°C
T
A
= 25°C
T
A
= 25°C
T
A
= 85°C
T
A
= 85°C
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
8
5532 G05
5532 G06
Typical Detector Characteristics,
4000MHz, Gain = 2, V
OS
= 0V
V
CC
= 3.6V
3600
3200
2800
2400
2000
1600
1200
800
400
4
8
T
A
= –40°C
Typical Detector Characteristics,
5000MHz, Gain = 2, V
OS
= 0V
(SOT-23 Package)
V
CC
= 3.6V
T
A
= –40°C
T
A
= 25°C
T
A
= 25°C
T
A
= 85°C
T
A
= 85°C
4
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
8
5532 G07
5532 G08
5532 G09
5532f
3
LTC5532
TYPICAL PERFOR A CE CHARACTERISTICS
unless otherwise indicated.
Typical Detector Characteristics,
6000MHz, Gain = 2, V
OS
= 0V
(SOT-23 Package)
3600
3200
V
OUT
OUTPUT VOLTAGE (mV)
V
OUT
OUTPUT VOLTAGE (mV)
2800
2400
2000
1600
1200
800
400
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
V
CC
= 3.6V
3600
3200
2800
2400
2000
1600
1200
800
400
8
T
A
= 85°C
3
8
T
A
= –40°C
T
A
= 25°C
V
OUT
OUTPUT VOLTAGE (mV)
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
Typical Detector Characteristics,
1000MHz, Gain = 4, V
OS
= 0V
3600
3200
V
OUT
OUTPUT VOLTAGE (mV)
2800
2400
2000
1600
1200
800
400
T
A
= 85°C
T
A
= 25°C
V
OUT
OUTPUT VOLTAGE (mV)
T
A
= –40°C
V
CC
= 3.6V
3600
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
V
OUT
vs RF Input Power and V
OS
,
1000MHz, Gain = 2
3600
V
CC
= 3.6V
3200 T
A
= 25°C
V
OUT
OUTPUT VOLTAGE (mV)
V
OUT
OUTPUT VOLTAGE (mV)
2800
2400
2000
1600
1200
800
400
V
OS
= 1V
V
OS
= 0.5V
V
OS
= 0.2V
V
OS
= 0V
4
8
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
U W
4
(R
LOAD
= 20k) Characteristics are for both packages
Typical Detector Characteristics,
7000MHz, Gain = 2, V
OS
= 0V
(SOT-23 Package)
V
CC
= 3.6V
3600
3200
Typical Detector Characteristics,
300MHz, Gain = 4, V
OS
= 0V
V
CC
= 3.6V
T
A
= –40°C
2800
2400
2000
1600
1200
800
400
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
8
T
A
= 25°C
T
A
= 85°C
0
–32 –27 –22 –17 –12 –7
–2
RF INPUT POWER (dBm)
5532 G07
5532 G11
5532 G12
V
OUT
vs RF Input Power and V
OS
,
300MHz, Gain = 2
V
CC
= 3.6V
3200 T
A
= 25°C
2800
2400
2000
1600
1200
800
400
V
OS
= 1V
V
OS
= 0.5V
V
OS
= 0.2V
4
8
V
OS
= 0V
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
8
5532 G13
5532 G14
V
OUT
vs RF Input Power, 300MHz
and 1000MHz, Gain = 2 and 4,
V
OS
= 0V
3600
V
CC
= 3.6V
3200 T
A
= 25°C
2800
2400
2000
1600
1200
800
400
1000MHz
GAIN = 2
300MHz
GAIN = 2
300MHz
GAIN = 4
1000MHz
GAIN = 4
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
5532 G16
8
5532 G15
5532f
LTC5532
TYPICAL PERFOR A CE CHARACTERISTICS
unless otherwise indicated.
V
OUT
Slope vs RF Input Power
at 300MHz
1000
V
CC
= 3.6V
GAIN = 2
V
OS
= 0V
1000
V
OUT
SLOPE (mV/dB)
V
OUT
SLOPE (mV/dB)
100
100
V
OUT
SLOPE (mV/dB)
T
A
= –40°C
10
T
A
= 85°C
T
A
= 25°C
1
–30
–25
–20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
5532 G17
V
OUT
Slope vs RF Input Power
at 3000MHz
1000
V
CC
= 3.6V
GAIN = 2
V
OS
= 0V
1000
V
OUT
SLOPE (mV/dB)
V
OUT
SLOPE (mV/dB)
100
100
V
OUT
SLOPE (mV/dB)
T
A
= –40°C
10
T
A
= 85°C
T
A
= 25°C
1
–30
–25
–20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
5532 G20
V
OUT
Slope vs RF Input Power
at 6000MHz (SOT-23 Package)
1000
V
CC
= 3.6V
GAIN = 2
V
OS
= 0V
1000
V
OUT
SLOPE (mV/dB)
V
OUT
SLOPE (mV/dB)
100
T
A
= –40°C
10
T
A
= 85°C
1
–30
–25
–20 –15 –10 –5
RF INPUT POWER (dBm)
U W
(R
LOAD
= 20k) Characteristics are for both packages
V
OUT
Slope vs RF Input Power
at 2000MHz
1000
V
CC
= 3.6V
GAIN = 2
V
OS
= 0V
V
OUT
Slope vs RF Input Power
at 1000MHz
V
CC
= 3.6V
GAIN = 2
V
OS
= 0V
100
T
A
= –40°C
10
T
A
= 85°C
T
A
= –40°C
10
T
A
= 85°C
T
A
= 25°C
1
–30
–25
–20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
5532 G18
T
A
= 25°C
1
–30
–25
–20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
5532 G19
V
OUT
Slope vs RF Input Power
at 4000MHz
V
CC
= 3.6V
GAIN = 2
V
OS
= 0V
1000
V
OUT
Slope vs RF Input Power
at 5000MHz (SOT-23 Package)
V
CC
= 3.6V
GAIN = 2
V
OS
= 0V
100
T
A
= –40°C
10
T
A
= 85°C
T
A
= –40°C
10
T
A
= 85°C
T
A
= 25°C
1
–30
–25
–20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
5532 G21
T
A
= 25°C
1
–30
–25
–20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
5532 G22
V
OUT
Slope vs RF Input Power
at 7000MHz (SOT-23 Package)
V
CC
= 3.6V
GAIN = 2
V
OS
= 0V
100
T
A
= –40°C
10
T
A
= 85°C
T
A
= 25°C
1
–30
T
A
= 25°C
0
5
5532 G23
–25
–20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
5532 G22
5532f
5
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