LTC5533
300MHz to 11GHz Precision
Dual RF Power Detector
FEATURES
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DESCRIPTIO
Two Independent Temperature Compensated
Schottky Diode RF Peak Detectors
45dB Channel-to-Channel Isolation at 2GHz
Wide Input Frequency Range: 300MHz to 11GHz*
Wide Input Power Range: –32dBm to 12dBm
Buffered Detector Outputs with Gain of 2x
Adjustable V
OUT
Starting Voltage
Wide V
CC
Range of 2.7V to 6V
Low Operating Current: <500µA/Channel
Low Shutdown Current: <2µA/Channel
4mm
×
3mm DFN Package
The LTC
®
5533 is a dual channel RF power detector for RF
applications operating in the 300MHz to 11GHz range.
Two independent temperature compensated Schottky di-
ode peak detectors and buffer amplifiers are combined in
a small 4mm
×
3mm DFN package.
The RF input voltage is peak detected using on-chip
Schottky diodes. The detected voltage is buffered and
supplied to the V
OUT
pins. A power saving shutdown mode
reduces current to less than 2µA/channel. The initial
output starting voltages can be precisely adjusted using
the V
OS
pins.
The LTC5533 operates with input power levels from
–32dBm to 12dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Higher frequency operation is achievable with reduced performance. Consult factory for more
information.
APPLICATIO S
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PA Forward and Reverse Power Monitor
Dual PA Transmit Power Control
802.11a, b, g, 802.15, WiMAX
PA Linearization
Fixed Wireless Access
RF Power Alarm
Envelope Detector
TYPICAL APPLICATIO
300MHz to 11GHz RF Power Detectors
3600
LTC5533
V
CC
100pF
V
OS1
V
CC1
V
OUT1
V
OS1
V
CC2
0.1µF
100pF
V
OS2
V
OUT2
V
OS2
RF
IN1
GND1
SHDN1
RF
IN2
GND2
SHDN2
5533 TA01
Output Voltage vs RF Input Power
3200
V
CC
= 3.6V
V
OS
= 0V
T
A
= 25°C
39pF
V
OUT
OUTPUT VOLTAGE (mV)
RF1 INPUT
2800
2400
2000
1600
1200
800
400
39pF
RF2 INPUT
DISABLE ENABLE
(EXPOSED PAD)
0
–28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
U
4GHz
1GHz
5GHz
500MHz
6GHz
8GHz
11GHz
10GHz
9GHz
8
12
5533 TA02
U
U
5533f
1
LTC5533
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
CC1
V
OUT1
V
OS1
V
CC2
V
OUT2
V
OS2
1
2
3
13
4
5
6
9
8
7
RF
IN2
GND2
SHDN2
12 RF
IN1
11 GND1
10 SHDN1
V
CC1
, V
CC2
, V
OUT1
, V
OUT2
, V
OS1
, V
OS2
....... –0.3V to 6.5V
RF
IN1
, RF
IN2
Voltage ........................(V
CC
±
1.25V) to 7V
RF
IN1
, RF
IN2
Power (RMS) ................................. 12dBm
SHDN1, SHDN2 Voltage to GND .. –0.3V to (V
CC
+ 0.3V)
I
VOUT1
, I
VOUT2
........................................................ 5mA
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Maximum Junction Temperature ......................... 125°C
Storage Temperature Range ................ – 65°C to 150°C
ORDER PART
NUMBER
LTC5533EDE
DFN PART
MARKING
5533
DE12 PACKAGE
12-LEAD (4mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 40°C/W
EXPOSED PAD IS GND (PIN 13)
MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.6V, SHDN = V
CC
= HI, SHDN = 0V = LO, RF Input Signal is Off,
V
OS
= 0V and SHDN = HI unless otherwise noted. Limits below are for one channel unless otherwise noted.
PARAMETER
V
CC
Operating Voltage
I
VCC
Operating Current
I
VCC
Shutdown Current
V
OUT
Start Voltage (No RF Input)
V
OUT
Output Current
V
OUT
Enable Time
V
OUT
Bandwidth
V
OUT
Load Capacitance
V
OUT
Slew Rate
V
OUT
Noise
V
OUT
Shutdown Resistance
V
OS
Voltage Range
V
OS
Input Current
SHDN Voltage, Chip Disabled
SHDN Voltage, Chip Enabled
SHDN Input Current
RF
IN
Input Frequency Range
RF
IN
Input Power Range
RF
IN
AC Input Resistance
RF
IN
Input Shunt Capacitance
Channel to Channel Isolation
RF Frequency = 300MHz to 7GHz (Note 5, 6) V
CC
= 2.7V to 6V
f = 1000MHz, Pin = –25dBm
f = 1000MHz, Pin = –25dBm
f = 2GHz
V
OS
= 1V
V
CC
= 2.7V to 6V
V
CC
= 2.7V to 6V
SHDN = 3.6V
I
VOUT
= 0mA
SHDN = LO
R
LOAD
= 2k, V
OS
= 0V
SHDN = LO
V
OUT
= 1.75V, V
CC
= 2.7V,
∆V
OUT
< 10mV
SHDN = LO to HI, C
LOAD
= 33pF, R
LOAD
= 2k
C
LOAD
= 33pF, R
LOAD
= 2k (Note 4)
(Note 6)
V
RFIN
= 1V Step, C
LOAD
= 33pF, R
LOAD
= 2k (Note 3)
V
CC
= 3V, Noise BW = 1.5MHz, 50Ω RF Input Termination
Resistance Measured to Ground
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
●
●
●
●
●
●
TYP
0.45
0.01
MAX
6
0.7
2
170
UNITS
V
mA
µA
mV
mV
mA
µs
MHz
pF
V/µs
mV
P-P
Ω
2.7
85
2
110 to 150
1
4
8
2
20
33
3
1
280
0
–0.5
1.4
22
300 to 11000
–32 to 12
220
0.65
45
36
1
0.5
0.35
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.
Note 4:
Bandwidth is calculated based on the 10% to 90% rise time
equation: BW = 0.35/rise time.
Note 5:
RF performance is production tested at 1800MHz
Note 6:
Guaranteed by design.
5533f
2
U
V
µA
V
V
µA
MHz
dBm
Ω
pF
dB
W
U
U
W W
W
LTC5533
TYPICAL PERFOR A CE CHARACTERISTICS
(For one channel. SHDN = V
CC
, unless
otherwise specified.)
Output Starting Voltage vs Supply
Voltage (RF Input Signal Off,
V
OS
= 0V)
140
500
V
OUT
OUTPUT VOLTAGE (mV)
T
A
= 85°C
130
T
A
= 25°C
T
A
= –40°C
125
SUPPLY CURRENT (µA)
135
480
T
A
= –40°C
460
SHUTDOWN CURRENT (nA)
120
2.5
3
5
3.5
4
4.5
SUPPLY VOLTAGE (V)
5.5
6
Typical Detector Characteristics,
300MHz
3600
3200
V
OUT
OUTPUT VOLTAGE (mV)
V
CC
= 3.6V
V
OS
= 0V
V
OUT
OUTPUT VOLTAGE (mV)
2800
2400
2000
1600
1200
800
400
0
–32 –28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
8 12
5533 G04
T
A
= –40°C
T
A
= 25°C
2800
2400
2000
1600
1200
800
400
0
–32 –28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
8 12
5533 G05
V
OUT
OUTPUT VOLTAGE (mV)
T
A
= 85°C
Typical Detector Characteristics,
3GHz
3600
3200
V
CC
= 3.6V
V
OS
= 0V
3600
3200
V
OUT
OUTPUT VOLTAGE (mV)
V
OUT
OUTPUT VOLTAGE (mV)
2800
2400
2000
1600
1200
800
400
0
–32 –28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
8 12
5533 G07
2800
2400
2000
1600
1200
800
T
A
= 85°C
400
0
–32 –28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
8 12
5533 G08
V
OUT
OUTPUT VOLTAGE (mV)
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
U W
5533 G01
Supply Current vs Supply Voltage
(RF Input Signal Off, V
OS
= 0V)
3.0
2.5
2.0
1.5
1.0
0.5
Shutdown Current vs Supply
Voltage (RF Input Signal Off,
V
OS
= 0V, SHDN = 0V)
T
A
= 85°C
T
A
= 25°C
T
A
= 85°C
440
T
A
= 25°C
T
A
= –40°C
3
4.5
4
5
3.5
SUPPLY VOLTAGE (V)
5.5
6
420
2.5
3
5
3.5
4
4.5
SUPPLY VOLTAGE (V)
5.5
6
0
2.5
5533 G02
5533 G03
Typical Detector Characteristics,
1GHz
3600
3200
V
CC
= 3.6V
V
OS
= 0V
T
A
= –40°C
3600
3200
2800
2400
2000
1600
1200
800
400
Typical Detector Characteristics,
2GHz
V
CC
= 3.6V
V
OS
= 0V
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 4
RF INPUT POWER (dBm)
8 12
5533 G06
Typical Detector Characteristics,
5GHz
V
CC
= 3.6V
V
OS
= 0V
3600
3200
2800
2400
Typical Detector Characteristics,
7GHz
V
CC
= 3.6V
V
OS
= 0V
T
A
= –40°C
T
A
= 25°C
T
A
= –40°C
2000
1600
T
A
= 25°C
1200
800
400
T
A
= 85°C
0
–32 –28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
8 12
5533 G09
5533f
3
LTC5533
TYPICAL PERFOR A CE CHARACTERISTICS
(For one channel. SHDN = V
CC
, unless
otherwise specified.)
V
OUT
Slope vs RF Input Power
at 300MHz
1000
V
CC
= 3.6V
V
OS
= 0V
1000
V
OUT
SLOPE (mV/dB)
V
OUT
SLOPE (mV/dB)
V
OUT
SLOPE (mV/dB)
100
T
A
= –40°C
10
T
A
= 85°C
T
A
= 25°C
1
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
V
OUT
Slope vs RF Input Power
at 3GHz
1000
V
CC
= 3.6V
V
OS
= 0V
1000
V
OUT
SLOPE (mV/dB)
100
T
A
= –40°C
T
A
= 85°C
10
T
A
= 25°C
V
OUT
SLOPE (mV/dB)
V
OUT
SLOPE (mV/dB)
1
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
V
OUT
Variation Relative to 25°C
vs RF Input Power at 300MHz
3
2
V
OUT
VARIATION (dB)
1
0
–1
–2
–3
–30 –26 –22 –18 –14 –10 –6 –2
RF INPUT POWER (dBm)
T
A
= 85°C
V
CC
= 3.6V
V
OS
= 0V
V
OUT
VARIATION (dB)
3
2
1
0
–1
–2
T
A
= –40°C
T
A
= –40°C
V
OUT
VARIATION (dB)
4
U W
4
8
5533 G10
V
OUT
Slope vs RF Input Power
at 1GHz
V
CC
= 3.6V
V
OS
= 0V
1000
V
OUT
Slope vs RF Input Power
at 2GHz
V
CC
= 3.6V
V
OS
= 0V
100
T
A
= –40°C
T
A
= 85°C
10
T
A
= 25°C
100
T
A
= –40°C
T
A
= 85°C
10
T
A
= 25°C
1
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
8
1
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
8
5533 G11
5533 G12
V
OUT
Slope vs RF Input Power
at 5GHz
V
CC
= 3.6V
V
OS
= 0V
1000
V
OUT
Slope vs RF Input Power
at 7GHz
V
CC
= 3.6V
V
OS
= 0V
100
T
A
= –40°C
T
A
= 85°C
10
T
A
= 25°C
100
T
A
= –40°C
T
A
= 85°C
10
T
A
= 25°C
4
8
1
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
8
1
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
4
8
5533 G13
5533 G14
5533 G15
V
OUT
Variation Relative to 25°C
vs RF Input Power at 1GHz
V
CC
= 3.6V
V
OS
= 0V
3
2
1
0
–1
–2
V
OUT
Variation Relative to 25°C
vs RF Input Power at 2GHz
V
CC
= 3.6V
V
OS
= 0V
T
A
= –40°C
T
A
= 85°C
T
A
= 85°C
2
6
–3
–30 –26 –22 –18 –14 –10 –6 –2
RF INPUT POWER (dBm)
2
6
–3
–30 –26 –22 –18 –14 –10 –6 –2
RF INPUT POWER (dBm)
2
6
5533 G16
5533 G17
5533 G18
5533f
LTC5533
TYPICAL PERFOR A CE CHARACTERISTICS
(For one channel. SHDN = V
CC
, unless
otherwise specified.)
V
OUT
Variation Relative to 25°C
vs RF Input Power at 3GHz
3
2
V
OUT
VARIATION (dB)
1
0
–1
–2
–3
–30 –26 –22 –18 –14 –10 –6 –2
RF INPUT POWER (dBm)
T
A
= 85°C
V
CC
= 3.6V
V
OS
= 0V
V
OUT
VARIATION (dB)
T
A
= –40°C
V
OUT
VARIATION (dB)
Example V
OUT1
– V
OUT2
Mismatch
with No RF Signal Input
25
PERCENTAGE DISTRIBUTION (%)
PERCENTAGE DISTRIBUTION (%)
V
CC
= 3.6V
V
OS
= 0V
T
A
= 25°C
25
20
V
OUT
OUTPUT VOLTAGE (mV)
15
10
5
0
–25 –20 –15 –10 –5 0 5 10 15 20 25
V
OUT1
– V
OUT2
MISMATCH (mV)
5533 G22
V
OUT
vs RF Input Power and V
OS
,
f
RF
= 2GHz
3600
3200
V
OUT
OUTPUT VOLTAGE (mV)
V
CC
= 3.6V
T
A
= 25°C
2800
V
OS
= 1V
V
OS
= 0.75V
V
OS
= 0.5V
800
400
V
OS
= 0V
V
OS
= 0.25V
ISOLATION (dB)
2400
2000
1600
1200
OUTPUT DELAY (ns)
0
–32 –28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
U W
2
5533 G19
V
OUT
Variation Relative to 25°C
vs RF Input Power at 5GHz
3
2
1
0
–1
–2
–3
–28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
V
CC
= 3.6V
V
OS
= 0V
T
A
= –40°C
3
2
1
0
–1
V
OUT
Variation Relative to 25°C
vs RF Input Power at 7GHz
V
CC
= 3.6V
V
OS
= 0V
T
A
= –40°C
T
A
= 85°C
T
A
= 85°C
–2
–3
–26 –22 –18 –14 –10 –6 –2 2
RF INPUT POWER (dBm)
6
4
8
6
10
5533 G20
5533 G21
Example V
OUT1
– V
OUT2
Mismatch
with –14dBm RF Signal Input at
1.8GHz
V
CC
= 3.6V
V
OS
= 0V
T
A
= 25°C
V
OUT
vs RF Input Power and V
CC
Supply Voltage, f
RF
= 2GHz
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
–32 –28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
V
CC
= 3V
V
CC
= 4V
V
OS
= 0V
T
A
= 25°C
V
CC
= 6V
V
CC
= 5V
20
15
10
5
0
–1 –0.8–0.6–0.4–0.2 0 0.2 0.4 0.6 0.8 1
V
OUT1
– V
OUT2
MISMATCH (dB)
5533 G23
8
12
5533 G24
Channel-to-Channel Isolation vs
RF Input Frequency
–20
CH. 2
–30
CH. 1
1000
900
800
700
600
500
400
Output Delay vs RF Input Power
V
CC
= 3.6V
V
OS
= 0V
T
A
= 25°C
–40
CH. 1
CH. 2
–50
V
CC
= 3.6V
V
OS
= 0V
T
A
= 25°C
RF P
IN
= +10dBm
0
2000 4000 6000 8000 10000 12000
RF INPUT FREQUENCY (MHz)
5533 G26
90% SWITCHING
300
200
50% SWITCHING
100
–20
–16
–12 –8
–4
0
RF INPUT POWER (dBm)
4
8
–60
–70
8 12
5533 G25
5533 G27
5533f
5
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