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LT5570IDD#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LT5570
1
5570f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Fast Responding, 40MHz
to 2.7GHz Mean-Squared
Power Detector
The LT
®
5570 is a 40MHz to 2.7GHz monolithic Logarithmic
Mean-Squared RF power detector. It is capable of RMS
measurement of an AC signal with wide dynamic range,
from –52dBm to 13dBm 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 waveforms. The
LT5570 is suitable for precision RF power measurement and
level control for a wide variety of RF standards, including
CDMA, W-CDMA, CDMA2000, TD-SCDMA and WiMAX.
The DC output is buffered with a low output impedance
amplifi er capable of driving a high capacitance load.
40MHz to 2.7GHz Mean-Squared Power Detector
n
Frequency Range: 40MHz to 2.7GHz
n
Accurate RMS Power Measurement of High Crest
Factor Modulated Waveforms
n
Linear DC Output vs Input Power in dBm
n
Linear Dynamic Range: Up to 60dB
n
Exceptional Accuracy over Temperature: ±0.3dB
n
Fast Response Time: 0.5μs Rise Time,
8μs Fall Time
n
Low Supply Current: 26.5mA
n
Low Impedance Output Buffer Capable of Driving
High Capacitance Load
n
Small 3mm × 3mm 10-Lead DFN Package
n
RMS Power Measurement
n
RF Power Control
n
Receive and Transmit Gain Control
n
W-CDMA, CDMA2000, TD-SCDMA, WiMAX
n
RF Instrumentation
Output Voltage, Linearity Error vs Input Power, 25°C (2140 MHz)
1
2
4
5
3
10
9
7
6
8
V
CC
IN
+
IN
–
GND
FLTR
EN
DNC
OUT
DNCDECNC
RF
INPUT
22nF
5V
ENABLE
V
OUT
1MF
1:4
5570 TA01a
LT5570
1nF
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 7262661, 7259620, 7268608.
RF INPUT POWER (dBm)
–45
V
OUT
(V)
LINEARITY ERROR (dB)
1.6
2.0
2.4
–25 –5
5570 TA01b
1.2
0.8
–35
–15 5 15
0.4
0
1
2
3
0
–1
–2
–3
CW
4CH WCDMA
3CH CDMA2000
LT5570
2
5570f
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
Supply Voltage .........................................................5.5V
Enable Voltage .................................–0.3V to V
CC
+ 0.3V
Input Signal Power (Differential) ..........................15dBm
T
JMAX
.................................................................... 125°C
Operating Temperature Range.................. –40°C to 85°C
Storage Temperature Range ................... –65°C to 125°C
CAUTION: This part is sensitive to electrostatic discharge. It
is very important that proper ESD precautions be observed
when handling the LT5570.
(Note 1)
TOP VIEW
DD PACKAGE
10-LEAD (3mm s 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
FLTR
EN
DNC
DNC
OUT
V
CC
IN
+
DEC
IN
–
GND
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
PARAMETER CONDITIONS MIN TYP MAX UNITS
AC Input
Input Frequency Range (Note 4)
l
40 to 2700 MHz
Input Impedance 200/1 Ω/pF
f
RF
= 500MHz
RF Input Power Range CW Input; 1:4 Balun Matched into 50Ω Source –52 to 13 dBm
Linear Dynamic Range (Note 5) ±1dB Linearity Error, T
A
= –40°C to 85°C 62 dB
Output Slope 36.9 mV/dB
Logarithmic Intercept –54.8 dBm
Output Variation vs Temperature Normalized to Output at 25°C
–40°C < T
A
< 85°C; P
IN
= –50dBm to 13dBm
±0.5 dB
Deviation from CW Response 11dB Peak to Average Ratio (3-Carrier CDMA2K)
12dB Peak to Average Ratio (4-Carrier WCDMA)
0.4
0.3
dB
dB
2
nd
Order Harmonic Distortion At RF Input; CW Input; P
IN
= 10dBm 61 dBc
3
rd
Order Harmonic Distortion At RF Input; CW Input; P
IN
= 10dBm 66 dBc
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C, V
CC
= 5V, EN = 5V, unless otherwise noted. Test circuits are shown in
Figures 1 and 3. (Notes 2 and 3).
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT5570IDD#PBF LT5570IDD#TRPBF LCJQ
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
LT5570
3
5570f
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
f
RF
= 880MHz
RF Input Power Range CW Input; 1:4 Balun Matched into 50Ω Source –48 to 13 dBm
Linear Dynamic Range (Note 5) ±1dB Linearity Error, T
A
= –40°C to 85°C 61 dB
Output Slope 37.7 mV/dB
Logarithmic Intercept –51.9 dBm
Output Variation vs Temperature Normalized to Output at 25°C
–40°C < T
A
< 85°C; P
IN
= –47dBm to 13dBm
±0.4 dB
Deviation from CW Response 11dB Peak to Average Ratio (3-Carrier CDMA2K)
12dB Peak to Average Ratio (4-Carrier WCDMA)
0.3
0.2
dB
2
nd
Order Harmonic Distortion At RF Input; CW Input; P
IN
= 10dBm 60 dBc
3
rd
Order Harmonic Distortion At RF Input; CW Input; P
IN
= 10dBm 61 dBc
f
RF
= 2140MHz
RF Input Power Range CW Input; 1:4 Balun Matched into 50Ω Source –38 to 13 dBm
Linear Dynamic Range (Note 5) ±1dB Linearity Error, T
A
= –40°C to 85°C 47 51 dB
Output Slope 34.8 36.5 39.0 mV/dB
Logarithmic Intercept –43.6 –40.6 –37.6 dBm
Output Variation vs Temperature Normalized to Output at 25°C
–40°C < T
A
< 85°C; P
IN
= –36dBm to 13dBm
±0.3 dB
Deviation from CW Response 11dB Peak to Average Ratio (3-Carrier CDMA2K)
12dB Peak to Average Ratio (4-Carrier WCDMA)
0.1
0.2
dB
dB
f
RF
= 2700MHz
RF Input Power Range CW Input; 1:4 Balun Matched into 50Ω Source –35 to 13 dBm
Linear Dynamic Range (Note 5) ±1dB Linearity Error, T
A
= –40°C to 85°C 48 dB
Output Slope 36.4 mV/dB
Logarithmic Intercept –38.5 dBm
Output Variation vs Temperature Normalized to Output at 25°C
–40°C < T
A
< 85°C; P
IN
= –31dBm to 13dBm
±0.2 dB
Deviation from CW Response 11dB Peak to Average Ratio (3-Carrier CDMA2K)
12dB Peak to Average Ratio (4-Carrier WCDMA)
0.1
0.5
dB
Output
Output DC Voltage No RF Signal Present 0.1 V
Output Impedance 100 Ω
Sourcing/Sinking 5/2.5 mA
Rise Time 0.2V to 1.6V, 10% to 90%, C1 = 22nF, f
RF
= 2140MHz 0.5 μS
Fall Time 1.6V to 0.2V, 90% to 10%, C1 = 22nF, f
RF
= 2140MHz 8 μS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C, V
CC
= 5V, EN = 5V, unless otherwise noted. Test circuits are shown in
Figures 1 and 3. (Notes 2 and 3).
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LT5570IDD#TRPBF

Mfr. #:
Buy LT5570IDD#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
RF Detector Fast Responding, 40MHz to 2.7GHz Mean-Squared Power Detector
Lifecycle:
New from this manufacturer.
Delivery:
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