LTC5582
40MHz to 10GHz
RMS Power Detector with
57dB Dynamic Range
FeaTures
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DescripTion
The LTC
®
5582 is a 40MHz to 10GHz RMS responding power
detector. It is capable of accurate power measurement
of an AC signal with wide dynamic range, from –60dBm
to 2dBm depending on frequency. The power of the AC
signal in an equivalent decibel-scaled value is precisely
converted into DC voltage on a linear scale, independent of
the crest factor of the input signal waveforms. The LTC5582
is suitable for precision RF power measurement and level
control for a wide variety of RF standards, including LTE,
WiMAX, W-CDMA, CDMA2000, TD-SCDMA, and EDGE.
The DC output is buffered with a low output impedance
amplifier capable of driving a high capacitance load. Con-
sult factory for more information. The part is packaged in
a 10-lead 3mm
×
3mm DFN. It is pin-to-pin compatible
with the LT5570.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 7262661, 7317357, 7622981.
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Frequency Range: 40MHz to 10GHz
Linear Dynamic Range: Up to 57dB
Accurate RMS Power Measurement of High Crest
Factor Modulated Waveforms
Exceptional Accuracy Over Temperature: ±0.5dB (Typ)
Low Linearity Error within Dynamic Range
Single-Ended or Differential RF Inputs
Fast Response Time: 90ns Rise Time
Low Supply Current: 41.6mA at 3.3V (Typ)
Small 3mm
×
3mm DFN10
applicaTions
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RMS Power Measurement
PA Power Control
Receive and Transmit Gain Control
LTE, WiMAX, W-CDMA, CDMA2K, TD-SCDMA,
EDGE Basestations
Point-to-Point Microwave Links
RF Instrumentation
Typical applicaTion
40MHz to 6GHz RMS Power Detector
3.3V
1µF
1nF
V
CC
IN
+
270pF
68
DEC
IN
–
1nF
GND
LTC5582
100nF
LINEARITY ERROR (dB)
FLTR
EN
RT1
RT2
OUT
5582 TA01a
Linearity Error vs RF Input Power
2140MHz Modulated Waveforms
3
2
1
0
–1
–2
–3
–65
4-CARRIER WCDMA
CW
3-CARRIER CDMA2K
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
T
A
= 25°C
ENABLE
V
OUT
5582 TAO1b
5582f
LTC5582
absoluTe MaxiMuM raTings
(Note 1)
pin conFiguraTion
TOP VIEW
V
CC
IN
+
DEC
IN
–
GND
1
2
3
4
5
11
GND
10 FLTR
9 EN
8 RT1
7 RT2
6 OUT
Supply Voltage .........................................................3.8V
Enable Voltage ................................ –0.3V to V
CC
+ 0.3V
Input Signal Power (Single-Ended, 50Ω) .............18dBm
Input Signal Power (Differential, 50Ω) .................24dBm
T
JMAX
.................................................................... 150°C
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range .................. –65°C to 125°C
DD PACKAGE
10-LEAD (3mm 3mm) PLASTIC DFN
T
JMAX
= 150°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC5582IDD#PBF
TAPE AND REEL
LTC5582IDD#TRPBF
PART MARKING
LFGZ
PACKAGE DESCRIPTION
10-Lead 3mm
×
3mm Plastic DFN
TEMPERATURE RANGE
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, EN = 3.3V. Test circuit is shown in Figure 1. (Notes 2 and 3).
PARAMETER
AC Input
Input Frequency Range (Note 4)
Input Impedance
f
RF
= 450MHz
RF Input Power Range
Linear Dynamic Range
Output Slope
Logarithmic Intercept
Output Variation vs Temperature
Deviation from CW Response
2nd Order Harmonic Distortion
3rd Order Harmonic Distortion
Normalized to Output at 25°C, Pin = –50dBm to 0dBm
11dB Peak to Average Ratio (3-Carrier CDMA2K)
12dB Peak to Average Ratio (4-Carrier WCDMA)
At RF Input; CW Input; PIN = 0dBm
At RF Input; CW Input; PIN = 0dBm
l
elecTrical characTerisTics
CONDITIONS
MIN
TYP
40 to 10000
MAX
UNITS
MHz
Ω//pF
dBm
dB
mV/dB
dBm
dB
dB
dB
dBc
dBc
Differential
CW; Single-Ended, 50Ω
±1dB Linearity Error
400//0.5
–57 to 2
59
29.5
–86.2
±0.5
0.1
0.1
67
62
5582f
LTC5582
elecTrical characTerisTics
PARAMETER
f
RF
= 880MHz
RF Input Power Range
Linear Dynamic Range
Output Slope
Logarithmic Intercept
Output Variation vs Temperature
Deviation from CW Response
2nd Order Harmonic Distortion
3rd Order Harmonic Distortion
f
RF
= 2140MHz
RF Input Power Range
Linear Dynamic Range (Note 5)
Output Slope
Logarithmic Intercept
Output Variation vs Temperature
Deviation from CW Response
f
RF
= 2700MHz
RF Input Power Range
Linear Dynamic Range
Output Slope
Logarithmic Intercept
Output Variation vs Temperature
Deviation from CW Response
f
RF
= 3800MHz
RF Input Power Range
Linear Dynamic Range
Output Slope
Logarithmic Intercept
Output Variation vs Temperature
Deviation from CW Response
f
RF
= 5800MHz
RF Input Power Range
Linear Dynamic Range
Output Slope
Logarithmic Intercept
Output Variation vs Temperature
Deviation from CW Response
Normalized to Output at 25°C, Pin = –46dBm to 2dBm
12dB Peak to Average Ratio (WiMAX OFDM)
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, EN = 3.3V. Test circuit is shown in Figure 1. (Notes 2 and 3).
CONDITIONS
CW; Single-Ended, 50Ω
±1dB Linearity Error
MIN
TYP
–57 to 2
59
29.3
–86.4
Normalized to Output at 25°C, Pin = –50dBm to 0dBm
11dB Peak to Average Ratio (3-Carrier CDMA2K)
12dB Peak to Average Ratio (4-Carrier WCDMA)
At RF Input; CW Input; PIN = 0dBm
At RF Input; CW Input; PIN = 0dBm
CW; Single-Ended, 50Ω
±1dB Linearity Error
50
26
–98
Normalized to Output at 25°C, Pin = –47dBm to 0dBm
11 dB Peak to Average Ratio (3-Carrier CDMA2K)
12dB Peak to Average Ratio (4-Carrier WCDMA)
CW; Single-Ended, 50Ω
±1dB Linearity Error
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MAX
UNITS
dBm
dB
mV/dB
dBm
dB
dB
dB
dBc
dBc
dBm
dB
±0.5
0.1
0.1
69
59
–56 to 1
57
29.5
–85
±0.5
0.1
0.1
–55 to 1
56
29.8
–83.8
33
–72
mV/dB
dBm
dB
dB
dB
dBm
dB
mV/dB
dBm
dB
dB
dBm
dB
mV/dB
dBm
dB
dB
dBm
dB
mV/dB
dBm
dB
dB
Normalized to Output at 25°C, Pin = –47dBm to 0dBm
12dB Peak to Average Ratio (WiMAX OFDM)
CW; Single-Ended, 50Ω
±1dB Linearity Error
l
±0.5
0.2
–51 to 2
53
30.3
–81
Normalized to Output at 25°C, Pin = –51dBm to 2dBm
12dB Peak to Average Ratio (WiMAX OFDM)
CW; Single-Ended, 50Ω
±1dB Linearity Error
l
±1
0.2
–46 to 3
49
30.9
–74.7
±1
0.2
5582f
LTC5582
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, EN = 3.3V. Test circuit is shown in Figure 1. (Notes 2 and 3).
PARAMETER
Output Interface
Output DC Voltage
Output Impedance
Output Current
Rise Time, 10% to 90%
Fall Time, 90% to 10%
Enable (EN) Low = Off, High = On
EN Input High Voltage (On)
EN Input Low Voltage (Off)
Enable Pin Input Current
Turn ON Time
Turn OFF Time
Power Supply
Supply Voltage
Supply Current
Shutdown Current
EN = 0V, V
CC
= 3.5V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTC5582 is guaranteed functional over the temperature range
–40°C to 85°C.
Note 3:
Logarithmic Intercept is an extrapolated input power level from the
best fitted log-linear straight line, where the output voltage is 0V.
3.1
3.3
41.6
0.1
3.5
52
10
V
mA
μA
EN = 3.3V
V
OUT
within 10% of Final Value, C3 = 8nF
V
OUT
< 0.8V, C3 = 8nF
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elecTrical characTerisTics
CONDITIONS
No RF Signal Present
Maximum
MIN
TYP
0.69
100
±5
90
5
MAX
UNITS
V
Ω
mA
nS
μS
V
0.8V to 2.4V, C3 = 8nF f
RF
= 100MHz
,
2.4V to 0.8V, C3 = 8nF f
RF
= 100MHz
,
1
0.4
125
2.8
40
200
V
μA
μs
μs
Note 4:
Operation over a wider frequency range is possible with reduced
performance. Consult the factory for information and assistance.
Note 5:
The linearity error is calculated by the difference between the
incremental slope of the output and the average output slope from
–50dBm to –5dBm. The dynamic range is defined as the range over which
the linearity error is within ±1dB.
noted. Test circuits shown in Figure 1.
Typical perForMance characTerisTics
Output Voltage vs RF Input Power
2.8
2.4
2.0
1.6
1.2
0.8
0.4
–65
450MHz
880MHz
2140MHz
2700MHz
3800MHz
5800MHz
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G01
V
CC
= 3.3V, EN = 3.3V, T
A
= 25°C unless otherwise
Linearity Error vs RF Input Power
3
2
1
0
–1
–2
–3
–65
450MHz
880MHz
2140MHz
2700MHz
3800MHz
5800MHz
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G02
Supply Current vs Supply Voltage
60
55
SUPPLY CURRENT (mA)
50
45
40
35
30
25
20
3.0
3.1
3.3
3.2
3.4
SUPPLY VOLTAGE (V)
3.5
3.6
5582 G27
T
A
= 25°C
T
A
= 25°C
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
LINEARITY ERROR (dB)
OUTPUT VOLTAGE (V)
5582f
LTC5582
noted. Test circuits shown in Figure 1.
Typical perForMance characTerisTics
Output Voltage, Linearity Error vs
RF Input Power, 450MHz
2.8
2.4
R
t1
= 12k
R
t2
= 2k
3
2
LINEARITY ERROR (dB)
V
OUT
VARIATION (dB)
1
0
–1
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G03
V
CC
= 3.3V, EN = 3.3V, T
A
= 25°C unless otherwise
Linear Error vs RF Input Power,
Modulated Waveforms, 450MHz
3
2
LINEARITY ERROR (dB)
1
0
–1
–2
–3
–65
4-CARRIER WCDMA
CW
3-CARRIER CDMA2K
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G05
Output Voltage Temperature
Variation from 25°C, 450MHz
3
2
1
0
T
A
= –40°C
–1
–2
–3
–65
R
t1
= 12k
R
t2
= 2k
T
A
= 25°C
OUTPUT VOLTAGE (V)
2.0
1.6
1.2
0.8
0.4
–65
T
A
= 85°C
–2
–3
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G04
Output Voltage, Linearity Error vs
RF Input Power, 880MHz
2.8
2.4
OUTPUT VOLTAGE (V)
2.0
1.6
1.2
0.8
0.4
–65
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G06
Output Voltage Temperature
Variation from 25°C, 880MHz
3
2
LINEARITY ERROR (dB)
V
OUT
VARIATION (dB)
1
0
–1
–2
–3
3
2
1
0
–1
–2
–3
–65
R
t1
= 12k
R
t2
= 2k
LINEARITY ERROR (dB)
3
2
1
0
–1
–2
Linear Error vs RF Input Power,
Modulated Waveforms, 880MHz
T
A
= 25°C
R
t1
= 12k
R
t2
= 2k
T
A
= 85°C
T
A
= –40°C
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G07
–3
–65
4-CARRIER WCDMA
CW
3-CARRIER CDMA2K
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G08
Output Voltage, Linearity Error vs
RF Input Power, 2140MHz
2.8
2.4
OUTPUT VOLTAGE (V)
2.0
1.6
1.2
0.8
0.4
–65
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G09
Output Voltage Temperature
Variation from 25°C, 2140MHz
3
2
LINEARITY ERROR (dB)
1
0
–1
–2
–3
V
OUT
VARIATION (dB)
3
2
1
0
–1
–2
–3
–65
R
t1
= 0
R
t2
= 2k
LINEARITY ERROR (dB)
3
2
1
0
–1
–2
Linear Error vs RF Input Power,
Modulated Waveforms, 2140MHz
T
A
= 25°C
R
t1
= 0
R
t2
= 2k
T
A
= 85°C
T
A
= –40°C
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G10
–3
–65
4-CARRIER WCDMA
CW
3-CARRIER CDMA2K
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G11
5582f
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