FEATURES
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LTC5564
UltraFast™ 7ns Response
Time 15GHz RF Power
Detector with Comparator
DESCRIPTION
The LTC
®
5564 is a precision, RF power detector for ap-
plications in the 600MHz to 15GHz frequency range. The
LTC5564 operates with input power levels from –24dBm
to 16dBm.
A temperature compensated Schottky diode peak detector,
gain-selectable operational amplifier, and fast comparator
are combined in a small 16-lead 3mm
×
3mm QFN package.
The RF input signal is peak detected and then sensed by
both a comparator and amplifier. The comparator provides
a 9ns response time to input levels exceeding V
REF
along
with a latch enable/disable function. The gain selectable
operational amplifier provides a 350V/µs slew rate and
75MHz of demodulation bandwidth to the analog output.
V
OUTADJ
and V
REF
pins allow for the adjustment of V
OUT
offset and V
COMP
switch point voltages, respectively.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
UltraFast is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
†
Higher frequency operation is achievable with reduced performance. Consult the factory for
more information.
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Temperature Compensated Schottky RF Peak Detector
Wide Input Frequency Range: 600MHz to 15GHz
†
Wide Input Power Range: –24dBm to 16dBm
7ns Typical Response Time
75MHz Demodulation Bandwidth
Programmable Gain Settings for Improved Sensitivity
Adjustable Amplifier Output Offset Voltage
High Speed Comparator with Latch Enable: 9ns
Typical Response Time
16-Lead 3mm
×
3mm QFN Package
RF Signal Presence Detectors for: 802.11a, 802.11b,
802.11g, 802.15, Optical Data Links, Wireless Data
Modems, Wireless and Cable Infrastructure
5.8GHz ISM Band Radios
MMDS Microwave Links
PA Power Supply Envelope Tracking Control
Fast Alarm
RF Power Monitor
Envelope Detector
Ultra-Wideband Radio
Radar Detector
APPLICATIONS
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TYPICAL APPLICATION
Demo Board Schematic Optimized for 15GHz
V
CC
1000pF
17
2.2pF
0.5pF
1
2
3
4
10pF
16
15
14
100pF
13
V
REF
V
COMP
V
CC
12
11
10
68
10pF
1000pF
V
OUT
V
OUT
OUTPUT VOLTAGE (mV)
V
OUT
vs Input Power 2.7GHz
3400
3200 V
CC
= 5V
3000 T
A
= 25°C
2800
2600
GAIN8
2400
2200
GAIN4
2000
1800
1600
1400
GAIN1
1200
1000
800
600
GAIN2
400
200
0
–24 –20 –16 –12 –8 –4 0 4 8 12 16
RFIN POWER (dBm)
5564 TA01b
15GHz
RFIN
NC V
CCRF
V
REF
V
COMP
RFIN
NC
GND
GND
LEN V
OUTADJ
G0
5
6
7
LTC5564
V
CCA
V
CCP
V
OUT
NC
G1
8
9 100pF
LEN
V
OUTADJ
10k
G1
G0
10k
10k
5564 F05
5564fa
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LTC5564
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
V
COMP
12 V
CCA
17
GND
11 V
CCP
10 V
OUT
9 NC
5
LEN
6
V
OUTADJ
7
G0
8
G1
V
CCRF
V
REF
NC
RFIN 1
NC 2
GND 3
GND 4
Supply Voltages
V
CCRF
= V
CCA
= V
CCP
............................................5.8V
RFIN Voltage for V
CCRF
≤ 5.5V ....................(V
CCRF
± 2V)
RFIN Power .........................................................16dBm
I
COMP
, I
VOUT
......................................................... ±10mA
V
OUTADJ
, V
REF
, V
COMP
, V
OUT
, G0, G1, LEN ...–0.3V to V
CC
Operating Temperature Range (Note 2)....–40°C to 85°C
Max Junction Temperature .................................. 125°C
Storage Temperature Range .................. –65°C to 150°C
16 15 14 13
UD PACKAGE
16-LEAD (3mm
×
3mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 68°C/W,
θ
JC
= 7.5°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC5564IUD#PBF
TAPE AND REEL
LTC5564IUD#TRPBF
PART MARKING
LFRF
PACKAGE DESCRIPTION
16-Lead (3mm
×
3mm) Plastic QFN
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/
ELECTRICAL CHARACTERISTICS
PARAMETER
Supply Voltage
Supply Current
Amplifier Characteristics
V
OUT
Output Offset
CONDITIONS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Supply voltage = V
CCRF
= V
CCA
= V
CCP
= 5V, GAIN1, C
LOAD
= 10pF
,
no RF input signal, unless otherwise noted.
MIN
l
TYP
44
MAX
5.5
UNITS
V
mA
3.0
Supply Voltage = 5V, No RFIN
GAIN1
GAIN2
GAIN4
GAIN8
Supply Voltage = 3.3V, No RFIN
GAIN1
GAIN2
GAIN4
GAIN8
l
l
195
195
290
295
315
360
280
280
290
315
395
395
mV
mV
mV
mV
mV
mV
mV
mV
l
l
185
185
385
385
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LTC5564
ELECTRICAL CHARACTERISTICS
PARAMETER
V
OUT
Slew Rate Rise/Fall
CONDITIONS
Supply Voltage = 5V, V
OUT
10% to 90%,
∆V
OUT
= 1.1V (Note 3)
GAIN1, Pin = 10dBm to 16dBm
GAIN2, Pin = 4dBm
GAIN4, Pin = –2dBm
GAIN8, Pin = –8dBm
Supply Voltage = 3.3V, V
OUT
10% to 90%,
∆V
OUT
= 1.1V (Note 3)
GAIN1, Pin = 10dBm to 16dBm
GAIN2, Pin = 4dBm
GAIN4, Pin = –2dBm
GAIN8, Pin = –8dBm
Demodulation Bandwidth
(Notes 4, 5)
GAIN1, V
OUT
= 500mV
GAIN2, V
OUT
= 500mV
GAIN4, V
OUT
= 500mV
GAIN8, V
OUT
= 500mV
GAIN1
∆V
OUT
= ±100mV (Note 5)
(Note 5)
Sourcing, R
L
= 2k
Supply Voltage = 5V, RFIN Step to 50% V
OUT
(Note 3)
GAIN1, Pin = 10dBm to 16dBm
GAIN2, Pin = 4dBm
GAIN4, Pin = –2dBm
GAIN8, Pin = –8dBm
Supply Voltage = 3.3V, RFIN Step to 50% V
OUT
(Note 3)
GAIN1, Pin = 10dBm to 16dBm
GAIN2, Pin = 4dBm
GAIN4, Pin = –2dBm
GAIN8, Pin = –8dBm
V
OUT
Output Voltage Swing
Comparator Characteristics
Comparator Response Time
Comparator Hysteresis
I
VREF
Input Current
RF Characteristics
RFIN Frequency Range
RFIN AC Input Resistance
RFIN Input Shunt Capacitance
RFIN Input Power Range
Digital I/O
LEN V
IL
/V
IH
G0 V
IL
/V
IH
G1 V
IL
/V
IH
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 LTC5564 is guaranteed functional within the operating
temperature range from –40°C to 85°C.
0.8
0.8
0.8
V
CCA
– 0.8
V
CCA
– 0.8
V
CCA
– 0.8
V
V
V
(Note 6)
Frequency = 1000MHz, Power Level = 0dBm
Frequency = 1000MHz, Power Level = 0dBm
(Note 6)
0.6 to 15
135
0.77
–24 to 16
GHz
Ω
pF
dBm
10dBm to 16dBm RFIN Step to V
COMP
50% (Note 3)
9
10
–2.3
ns
mV
µA
Supply Voltage = 3V
1.4
1.7
7.0
9.0
11.0
14.0
7.1
9.0
11.0
14.0
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Supply voltage = V
CCRF
= V
CCA
= V
CCP
= 5V, GAIN1, C
LOAD
= 10pF
,
no RF input signal, unless otherwise noted.
MIN
TYP
350/70
185/70
120/70
50/50
325/70
185/70
120/70
50/50
75
52
35
15
0/225
10
MAX
UNITS
V/µs
V/µs
V/µs
V/µs
V/µs
V/µs
V/µs
V/µs
MHz
MHz
MHz
MHz
mV
pF
mA
ns
ns
ns
ns
ns
ns
ns
ns
V
V
OUTADJ
Input Range
V
OUT
Load Capacitance
V
OUT
Output Current
V
OUT
Response Time
Note 3:
RFIN step from no power to stated level.
Note 4:
See typical curve for bandwidth vs output voltage.
Note 5:
See Applications Information section.
Note 6:
Specification is guaranteed by design and not 100% tested in
production.
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LTC5564
TYPICAL PERFORMANCE CHARACTERISTICS
Demodulation Bandwidth
30 V
OUT
= 500mV
V
OUT
–3dB CROSSOVER (MHz)
20
10
GAIN (dB)
0
–10
–20
–30
–40
–50
0.01
GAIN8
GAIN4
GAIN2
GAIN1
0.1
1
10
FREQUENCY (MHz)
100
1000
5564 G01
Demodulation Bandwidth vs V
OUT
80
70
60
50
40
30
20
10
0
200
85°C
250
300
350
V
OUT
(mV)
5564 G02
V
OUT
Pulse Response, P
IN
= 8dBm
GAIN1
GAIN2
GAIN4
V
OUT
500mV/DIV
ASK MODULATED RF
INPUT SIGNAL START
GAIN8
V
CC
= 5V
ASK MODULATION FREQUENCY 2.7GHz
GAIN1
10ns/DIV
5564 G03
25°C
400
–40°C
450
500
V
OUT
Pulse Response = –10dBm
400
V
OUT
Offset vs Supply Voltage
GAIN8
GAIN4
GAIN2
GAIN1
V
OUT
(mV)
V
OUT
Offset vs Temperature
GAIN1
350
330
310
AVERAGE
290
270
250
–3 STDEV
V
CC
= 5V
3 STDEV
350
V
OUT
50mV/DIV
ASK MODULATED RF
INPUT SIGNAL START
V
CC
= 5V
ASK MODULATION FREQUENCY 2.7GHz
GAIN1
10ns/DIV
5564 G04
V
OUT
(mV)
300
250
3
3.5
4
4.5
V
CC
(V)
5
5.5
5564 G05
230
–40
–20
20
40
0
TEMPERATURE (°C)
60
80
5565 G06
V
OUT
Offset vs Temperature
GAIN2
350
V
CC
= 5V
3 STDEV
330
410
390
370
350
V
OUT
(mV)
V
OUT
(mV)
AVERAGE
290
330
310
290
270
–3 STDEV
250
60
80
5565 G07
V
OUT
Offset vs Temperature
GAIN4
V
CC
= 5V
590
3 STDEV
540
490
440
V
OUT
(mV)
AVERAGE
390
340
290
–3 STDEV
240
190
–20
20
40
0
TEMPERATURE (°C)
60
80
5565 G08
V
OUT
Offset vs Temperature
GAIN8
V
CC
= 5V
3 STDEV
310
AVERAGE
270
–3 STDEV
250
–40
–20
20
40
0
TEMPERATURE (°C)
230
–40
140
–40
–20
20
40
0
TEMPERATURE (°C)
60
80
5565 G09
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LTC5564
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Supply Voltage
48
46
44
I
CC
(mA)
42
40
38
36
34
GAIN1, GAIN2
GAIN4, GAIN8
4000
3600
V
OUT
OUTPUT VOLTAGE (mV)
3200
V
OUT
vs Input Power 700MHz
V
CC
= 5V
GAIN1
V
OUT
OUTPUT VOLTAGE (mV)
4800
4400
4000
3600
3200
2800
2400
2000
1600
1200
800
400
V
OUT
vs Input Power 1.9GHz
V
CC
= 5V
GAIN1
T
A
= 25°C
2800
2400
2000
1600
1200
800
400
–40°C
25°C
85°C
3
3.5
4
4.5
V
CC
(V)
5
5.5
5564 G10
0
–10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16
RFIN INPUT POWER (dBm)
5564 G24
0
–10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16
RFIN POWER (dBm)
5564 G25
3400
3200 V
CC
= 5V
3000 T
A
= 25°C
2800
2600
GAIN8
2400
2200
GAIN4
2000
1800
1600
1400
GAIN1
1200
1000
800
600
GAIN2
400
200
0
–24 –20 –16 –12 –8 –4 0 4 8 12 16
RFIN POWER (dBm)
5564 G11
V
OUT
vs Input Power 2.7GHz
V
OUT
vs Input Power 2.7GHz
3600
V
CC
= 5V
3200 GAIN1
2800
2400
2000
1600
1200
800
400
0
–10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16
RFIN POWER (dBm)
5564 G12
3200
2800
V
OUT
OUTPUT VOLTAGE (mV)
V
OUT
vs Input Power 5.8GHz
V
CC
= 5V
GAIN1
V
OUT
OUTPUT VOLTAGE (mV)
V
OUT
OUTPUT VOLTAGE (mV)
–40°C
25°C
2400
2000
1600
1200
800
400
0
–10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16
RFIN POWER (dBm)
5564 G13
–40°C
25°C
85°C
85°C
V
OUT
vs Input Power 8GHz
2400
V
OUT
OUTPUT VOLTAGE (mV)
2000
1600
1200
800
400
0
–10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16
RFIN INPUT POWER (dBm)
5564 G26
V
OUT
vs Input Power 10GHz
1600
1400
V
OUT
OUTPUT VOLTAGE (mV)
1200
1000
800
600
400
200
0
–24 –20 –16 –12 –8 –4 0 4
RFIN POWER (dBm)
8
12 16
5564 G27
V
CC
= 5V
GAIN1
T
A
= 25°C
V
CC
= 5V
GAIN1
T
A
= 25°C
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