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LTC5587IDD#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC5587
1
5587f
BLOCK DIAGRAM
FEATURES DESCRIPTION
6 GHz RMS Power Detector
with Digital Output
The LTC
®
5587 is a 10MHz to 6GHz, low power monolithic
precision RMS power detector with an integrated 12-bit
serial analog-to-digital converter (ADC). The RMS detec-
tor uses a proprietary technique to accurately measure the
RF power of modulated signals with crest-factor as high
as 12dB. For an input frequency of 2.14GHz the detection
range is from –34dBm to 6dBm. The serial digital output
of the detector is a 12-bit word value that is directly pro-
portional to the RF signal power measured in dBm. The
LTC5587 is suitable for precision power measurement
for a wide variety of RF standards, including LTE, WiMAX,
W-CDMA, TD-SCDMA, CDMA, CDMA2000, EDGE, GSM,
etc. The DC output of the detector is connected in series
with an on-chip 300Ω resistor to the analog output pin
(V
OUT
). This enables further filtering of the output modu-
lation ripple using an off-chip capacitor before analog-to-
digital conversion. The ADC features include no data latency,
no missing codes, and a sampling rate of up to 500ksps. A
dedicated external reference pin (V
REF
) can be tied to V
DD
or other suitable low-impedance voltage reference to set the
ADC full-scale input voltage range. The ADC also features
an automatic power down after each conversion making
the LTC5587 ideal for low-power applications.
APPLICATIONS
n
Frequency Range: 10MHz to 6GHz
n
Accurate Power Measurement of High Crest Factor
(Up to 12dB) Waveforms
n
40dB Log Linear Dynamic Range
n
Exceptional Accuracy Over Temperature
n
Single-Ended RF Input
n
0.014dB/Bit (12-Bit) ADC Resolution (V
REF
= 1.8V)
n
ADC Sample Rate Up to 500ksps
n
SPI/MICROWIRE Serial I/O
n
Compatible with 1V to 3.6V Digital Logic
n
Fast Response Time: 1s Rise, 8s Fall
n
Low Power: 3mA at 3.3V and 500ksps
n
Small 3mm × 3mm 12-pin DFN Package
n
LTE, WiMAX, W-CDMA, TD-SCDMA, CDMA,
CDMA2000, EDGE, GSM
n
Pico-Cells, Femto-Cells RF Power Control
n
Wireless Repeaters
n
CATV/DVB Transmitters
n
MIMO Wireless Access Points
n
Portable RMS Power Measurement
n
Antenna Monitor
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.
5587 BD
EXPOSED
PAD
V
OUT
SDO
V
DD
V
REF
GNDV
CC
ENC
SQ
OV
DD
RF
7
413
150kHz LPF
OUTPUT
BUFFER
300
RMS
DETECTOR
THREE-STATE
SERIAL OUTPUT
PORT
S/H
12-BIT ADC
11
10896
3
1
SCK
2
CONV
12
TIMING
LOGIC
BIAS
5
Linearity Error vs RF Input Power
2140MHz Modulated Waveforms
2
1
0
–2
–1
–3
3
RF INPUT POWER (dBm)
LINEARITY ERROR (dB)
–30
–20
–10
–35
–25
0
10
–15
–5
5
5587 G12
T
A
= 25°C
CW
WCDMA, UL
WCDMA DL 1C
WCDMA DL 4C
LTE DL 1C
LTE DL 4C
LTC5587
2
5587f
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
(Note 1)
TOP VIEW
DFN PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
12
11
8
9
10
4
5
3
2
1
CONV
V
DD
V
REF
EN
V
CC
RF
SDO
SCK
OV
DD
V
OUT
GND
C
SQ
6
7
13
GND
T
JMAX
= 150°C, θ
JA
= 76°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC5587IDD#PBF LTC5587IDD#TRPBF LFRH 12-Lead (3mm × 3mm) Plastic DFN –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/
V
DD
, V
CC
Voltage, (Note 12) ........................................4V
OV
DD
Supply Voltage ......................Min(V
DD
+ 0.3V, 4V)
Maximum Input Signal Power (Average) .............15dBm
Maximum Input Signal Power (Peak) ...................25dBm
DC Voltage at RF .......................................... –0.3V to 2V
V
OUT
Voltage ................................... –0.3V to V
DD
+ 0.3V
EN Voltage ...................................... –0.3V to V
DD
+ 0.3V
SDO, SCK, CONV Voltage ................ –0.3V to V
DD
+ 0.3V
V
REF
Voltage .................................... –0.3V to V
DD
+ 0.3V
Power Dissipation ...............................................100mW
Maximum Junction Temperature, T
JMAX
............... 150°C
Operating Temperature Range (Note 2)....–40°C to 85°C
Storage Temperature Range ................... –65°C to 150°C
Caution: This part is sensitive to electrostatic discharge. It
is very important that proper ESD precautions be observed
when handling the LTC5587.
PARAMETER CONDITIONS MIN TYP MAX UNITS
RF Input
Input Frequency Range (Note 4) 10 to 6000 MHz
Input Impedance 205||1.6 ||pF
f
RF
= 450MHz
RF Input Power Range Externally Matched to 50 Source –34 to 6 dBm
Linear Dynamic Range, CW (Note 3) ±1dB Linearity Error 40 dB
Linear Dynamic Range, CDMA (Note 3) ±1dB Linearity Error; CDMA 4-Carrier 40 dB
Output Slope 73 LSB/dB
Logarithmic Intercept (Note 5) –42 dBm
Output Variation vs Temperature Normalized to Output at 25°C; P
IN
= –34dBm to 6dBm ±1 dB
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
CC
= V
DD
= OV
DD
= 3.3V, V
REF
= 1.8V, EN = 3.3V, f
SMPL
=
f
SMPL(MAX)
and f
SCK
= f
SCK(MAX)
unless otherwise noted. Test circuit is shown in Figure 1.
LTC5587
3
5587f
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Variation vs Temperature Normalized to Output at 25°C; P
IN
= –27dBm to –10dBm ±0.5 dB
Deviation from CW Response;
P
IN
= –34dBm to 0dBm
TETRA π/4 DQPSK
CDMA 4-Carrier 64-Channel Fwd 1.23Mcps
±0.1
±0.5
dB
dB
2nd Order Harmonic Distortion At RF Input; CW Input; P
IN
= 0dBm –57 dBc
3rd Order Harmonic Distortion At RF Input; CW Input; P
IN
= 0dBm –52 dBc
f
RF
= 880MHz
RF Input Power Range CW Input: Externally Matched to 50 Source –34 to 6 dBm
Linear Dynamic Range, CW (Note 3) ±1dB Linearity Error 40 dB
Linear Dynamic Range, EDGE (Note 3) ±1dB Linearity Error; EDGE 3π/8-Shifted 8PSK 40 dB
Output Slope 73 LSB/dB
Logarithmic Intercept (Note 5) –42 dBm
Output Variation vs Temperature Normalized to Output at 25°C; P
IN
= –34dBm to 6dBm ±1 dB
Output Variation vs Temperature Normalized to Output at 25°C; P
IN
= –27dBm to –10dBm ±0.5 dB
Deviation from CW Response;
P
IN
= –34dBm to 6dBm
EDGE 3π/8 Shifted 8PSK ±0.1 dB
f
RF
= 2140MHz
RF Input Power Range CW Input: Externally Matched to 50 Source –34 to 6 dBm
Linear Dynamic Range, CW (Note 3) ±1dB Linearity Error 43 dB
Linear Dynamic Range, WCDMA (Note 3) ±1dB Linearity Error; 4-Carrier WCDMA 37 dB
Output Slope 73 LSB/dB
Logarithmic Intercept (Note 5) –42 dBm
Output Variation vs Temperature Normalized to Output at 25°C; P
IN
= –34dBm to 6dBm ±1 dB
Output Variation vs Temperature Normalized to Output at 25°C; P
IN
= –27dBm to –10dBm ±0.5 dB
Deviation from CW Response;
P
IN
= –34dBm to –4dBm
WCDMA 1-Carrier Uplink
WCDMA 64-Channel 4-Carrier Downlink
±0.1
±0.5
dB
dB
f
RF
= 2600MHz
RF Input Power Range CW Input: Externally Matched to 50 Source –34 to 6 dBm
Linear Dynamic Range, CW (Note 3) ±1dB Linearity Error 40 dB
Output Slope 73 LSB/dB
Logarithmic Intercept (Note 5) –42 dBm
Output Variation vs Temperature Normalized to Output at 25°C; P
IN
= –34dBm to 6dBm ±1 dB
Output Variation vs Temperature Normalized to Output at 25°C; P
IN
= –27dBm to –10dBm ±0.5 dB
Deviation from CW Response;
P
IN
= –34dBm to 2dBm
WiMax OFDMA Preamble
WiMax OFDM Burst
±0.1
±0.5
dB
dB
f
RF
= 3500MHz
RF Input Power Range CW Input: Externally Matched to 50 Source –30 to 6 dBm
Linear Dynamic Range, CW (Note 3) ±1dB Linearity Error 36 dB
Output Slope 73 LSB/dB
Logarithmic Intercept (Note 5) –40 dBm
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
CC
= V
DD
= OV
DD
= 3.3V, V
REF
= 1.8V, EN = 3.3V, f
SMPL
=
f
SMPL(MAX)
and f
SCK
= f
SCK(MAX)
unless otherwise noted. Test circuit is shown in Figure 1.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC5587IDD#TRPBF

Mfr. #:
Buy LTC5587IDD#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
RF Detector 6GHz RMS Power Detector with 12-Bit Serial Output ADC
Lifecycle:
New from this manufacturer.
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