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 measure-
ment 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 wave-
forms. 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. Consult factory for more information.
The part is packaged in a 10-lead 3mm × 3mm DFN. It is
pin-to-pin compatible with the LT5570.
All registered trademarks and 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
C
= 25°C
ENABLE
V
OUT
5582 TAO1b
Document Feedback
For more information
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1
Rev A
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
Case Operating Temperature Range (T
C
):
I-Grade (Note 2)................................. –40°C to 105°C
H-Grade (Note 3) ............................... –40°C to 125°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
LTC5582HDD#PBF
TAPE AND REEL
LTC5582IDD#TRPBF
LTC5582HDD#TRPBF
PART MARKING
LFGZ
LFGZ
PACKAGE DESCRIPTION
10-Lead 3mm × 3mm Plastic DFN
10-Lead 3mm × 3mm Plastic DFN
TEMPERATURE RANGE
–40°C to 105°C
–40°C to 125°C
Consult ADI Marketing for parts specified with wider operating temperature ranges.
Consult ADI Marketing for information on non-standard lead based finish parts.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
C
= 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 5)
Input Impedance
f
RF
= 450MHz
RF Input Power Range
Linear Dynamic Range (Note 6)
Output Slope
Logarithmic Intercept (Notes 4, 6)
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
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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
2
Rev A
For more information
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LTC5582
ELECTRICAL CHARACTERISTICS
PARAMETER
f
RF
= 880MHz
RF Input Power Range
Linear Dynamic Range (Note 6)
Output Slope
Logarithmic Intercept (Notes 4, 6)
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 6)
Output Slope
Logarithmic Intercept (Notes 4, 6)
Output Variation vs Temperature
Deviation from CW Response
f
RF
= 2700MHz
RF Input Power Range
Linear Dynamic Range (Note 6)
Output Slope
Logarithmic Intercept (Notes 4, 6)
Output Variation vs Temperature
Deviation from CW Response
f
RF
= 3800MHz
RF Input Power Range
Linear Dynamic Range (Note 6)
Output Slope
Logarithmic Intercept (Notes 4, 6)
Output Variation vs Temperature
Deviation from CW Response
f
RF
= 5800MHz
RF Input Power Range
Linear Dynamic Range (Note 6)
Output Slope
Logarithmic Intercept (Notes 4, 6)
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
C
= 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
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±1
0.2
–46 to 3
49
30.9
–74.7
±1
0.2
For more information
www.analog.com
3
Rev A
LTC5582
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
C
= 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 LTC5582IDD is guaranteed functional over the case
temperature range –40°C to 105°C. All limits at –40°C and 105°C are
guaranteed by design and production sample testing.
Note 3:
The LTC5582HDD is guaranteed functional over the case
temperature range –40°C to 125°C. All limits at –40°C and 125°C are
guaranteed by 100% production testing.
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:
Logarithmic Intercept is an extrapolated input power level from the
best fitted log-linear straight line, where the output voltage is 0V.
Note 5:
Operation over a wider frequency range is possible with reduced
performance. Consult the factory for information and assistance.
Note 6:
The linearity error is calculated by the difference between the
incremental slope of the output and the average output slope from
–50dBm to –5dBm for frequencies up to 5.8GHz, and –25dBm to –5dBm
for 8GHz and 10GHz. The dynamic range is defined as the range over
which the linearity error is within ±1dB.
4
Rev A
For more information
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LTC5582
R
T2
= 0Ω unless otherwise noted. Test circuits shown in Figure 1.
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
TYPICAL PERFORMANCE CHARACTERISTICS
3
2
1
0
–1
–2
–3
–65
450MHz
880MHz
2140MHz
2700MHz
3800MHz
5800MHz
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
V
CC
= 3.3V, EN = 3.3V, T
C
= 25°C, R
T1
= 0Ω,
Linearity Error vs RF Input Power
T
C
= 25°C
60
Supply Current vs Supply Voltage
T
C
= 25°C
SUPPLY CURRENT (mA)
LINEARITY ERROR (dB)
OUTPUT VOLTAGE (V)
50
40
30
–5
5
5582 G02
20
2.6
T
C
= 125°C
T
C
= 105°C
T
C
= 85°C
T
C
= 25°C
T
C
= –40°C
2.8
3.0
3.2
3.4
SUPPLY VOLTAGE (V)
3.6
3.8
5582 G27
Output Voltage, Linearity Error vs
RF Input Power, 450MHz
2.8
2.4
OUTPUT VOLTAGE (V)
2.0
1.6
1.2
0.8
0.4
–65
3.0
TEMPERATURE DRIFT ERROR (dB)
2.0
LINEARITY ERROR (dB)
1.0
0
–1.0
–2.0
–3.0
3.0
2.0
1.0
0
–1.0
–2.0
Output Voltage Temperature
Variation from 25°C, 450MHz
T
C
= 125°C
T
C
= 105°C
T
C
= 85°C
T
C
= –40°C
3
2
LINEARITY ERROR (dB)
1
0
–1
–2
Linear Error vs RF Input Power,
Modulated Waveforms, 450MHz
T
C
= 25°C
T
C
= 125°C
T
C
= 105°C
T
C
= 85°C
T
C
= 25°C
T
C
= –40°C
–55
–45 –35 –25 –15
INPUT POWER (dBm)
–5
5
5582 G3
–3.0
–65
–55
–45 –35 –25 –15
INPUT POWER (dBm)
–5
5
5582 G04
–3
–65
4-CARRIER WCDMA
CW
3-CARRIER CDMA2K
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G05
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
C
= 125°C
T
C
= 105°C
T
C
= 85°C
T
C
= 25°C
T
C
= –40°C
–55
–45 –35 –25 –15
INPUT POWER (dBm)
–5
5
5582 G6
Output Voltage Temperature
Variation from 25°C, 880MHz
3.0
TEMPERATURE DRIFT ERROR (dB)
2.0
LINEARITY ERROR (dB)
1.0
0
–1.0
–2.0
–3.0
3.0
2.0
1.0
0
–1.0
–2.0
–3.0
–65
T
C
= 125°C
T
C
= 105°C
T
C
= 85°C
T
C
= –40°C
3
2
LINEARITY ERROR (dB)
1
0
–1
–2
Linear Error vs RF Input Power,
Modulated Waveforms, 880MHz
T
C
= 25°C
–55
–45 –35 –25 –15
INPUT POWER (dBm)
–5
5
5582 G7
–3
–65
4-CARRIER WCDMA
CW
3-CARRIER CDMA2K
–55
–45 –35 –25 –15
RF INPUT POWER (dBm)
–5
5
5582 G08
For more information
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5
Rev A
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