LTC5532EDC#TRMPBF [Linear]
LTC5532 - Precision 300MHz to 7GHz RF Detector with Gain and Offset Adjustment; Package: DFN; Pins: 6; Temperature Range: -40°C to 85°C;
| 型号： | LTC5532EDC#TRMPBF |
| 厂家： | 
Linear |
| 描述： | LTC5532 - Precision 300MHz to 7GHz RF Detector with Gain and Offset Adjustment; Package: DFN; Pins: 6; Temperature Range: -40°C to 85°C |
| 文件： | 总14页 (文件大小：222K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC5564
UltraFast™ 7ns Response
Time 15GHz RF Power
Detector with Comparator
DESCRIPTION
FEATURES
Temperature Compensated Schottky RF Peak Detector The LTC®5564 is a precision, RF power detector for ap-
n
†
n
n
n
n
n
n
n
Wide Input Frequency Range: 600MHz to 15GHz
Wide Input Power Range: –24dBm to 16dBm
7ns Typical Response Time
plications in the 600MHz to 15GHz frequency range. The
LTC5564 operates with input power levels from –24dBm
to 16dBm.
75MHz Demodulation Bandwidth
AtemperaturecompensatedSchottkydiodepeakdetector,
gain-selectableoperationalamplifier,andfastcomparator
arecombinedinasmall16-lead3mm× 3mmQFNpackage.
Programmable Gain Settings for Improved Sensitivity
Adjustable Amplifier Output Offset Voltage
High Speed Comparator with Latch Enable: 9ns
Typical Response Time
The RF input signal is peak detected and then sensed by
bothacomparatorandamplifier.Thecomparatorprovides
n
16-Lead 3mm × 3mm QFN Package
a 9ns response time to input levels exceeding V along
REF
APPLICATIONS
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.
n
RF Signal Presence Detectors for: 802.11a, 802.11b,
802.11g, 802.15, Optical Data Links, Wireless Data
Modems, Wireless and Cable Infrastructure
V
and V
pins allow for the adjustment of V
switch point voltages, respectively.
OUTADJ
offset and V
REF
OUT
n
5.8GHz ISM Band Radios
COMP
n
MMDS Microwave Links
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.
n
PA Power Supply Envelope Tracking Control
n
†
Fast Alarm
Higher frequency operation is achievable with reduced performance. Consult the factory for
more information.
n
RF Power Monitor
n
Envelope Detector
n
Ultra-Wideband Radio
n
Radar Detector
TYPICAL APPLICATION
Demo Board Schematic Optimized for 15GHz
V
CC
VOUT vs Input Power 2.7GHz
V
REF
3400
1000pF
10pF
100pF
13
V
COMP
V
T
= 5V
3200
3000
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
CC
= 25°C
A
17 16
NC
RFIN
15
14
15GHz
RFIN
V
CC
GAIN8
GAIN4
V
CCRF
V
V
REF COMP
2.2pF
1
2
3
4
12
V
V
V
CCA
CCP
10pF
1000pF
0.5pF
11
10
9
NC
LTC5564
68Ω
GAIN1
V
GND
OUT
OUT
100pF
GND
NC
600
GAIN2
LEN V
G0
G1
OUTADJ
6
400
200
5
7
8
0
LEN
G1
G0
–24 –20 –16 –12 –8 –4
0
4
8
12 16
V
OUTADJ
RFIN POWER (dBm)
10k
10k
10k
5564 TA01b
5564 F05
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LTC5564
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Note 1)
TOP VIEW
Supply Voltages
V
= V
= V ............................................5.8V
CCRF
CCA CCP
RFIN Voltage for V
≤ 5.5V....................(V
2V)
RFIN Power .........................................................16dBm
, I ......................................................... 10mA
16 15 14 13
CCRF
CCRF
RFIN
NC
1
2
3
4
12 V
11 V
CCA
CCP
OUT
I
17
GND
COMP VOUT
GND
GND
V
10
9
V
, V , V
, V , G0, G1, LEN...–0.3V to V
OUTADJ REF COMP OUT CC
NC
Operating Temperature Range (Note 2)....–40°C to 85°C
Max Junction Temperature .................................. 125°C
Storage Temperature Range .................. –65°C to 150°C
5
6
7
8
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
T
= 125°C, θ = 68°C/W, θ = 7.5°C/W
JA JC
JMAX
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
16-Lead (3mm × 3mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
LTC5564IUD#PBF
LTC5564IUD#TRPBF
LFRF
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 The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. Supply voltage = VCCRF = VCCA = VCCP = 5V, GAIN1, CLOAD = 10pF,
no RF input signal, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
l
Supply Voltage
3.0
5.5
Supply Current
44
mA
Amplifier Characteristics
V
Output Offset
Supply Voltage = 5V, No RFIN
OUT
l
l
GAIN1
GAIN2
GAIN4
GAIN8
195
195
290
295
315
360
395
395
mV
mV
mV
mV
Supply Voltage = 3.3V, No RFIN
l
l
GAIN1
GAIN2
GAIN4
GAIN8
185
185
280
280
290
315
385
385
mV
mV
mV
mV
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LTC5564
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. Supply voltage = VCCRF = VCCA = VCCP = 5V, GAIN1, CLOAD = 10pF,
no RF input signal, unless otherwise noted.
PARAMETER
Slew Rate Rise/Fall
CONDITIONS
MIN
TYP
MAX
UNITS
V
Supply Voltage = 5V, V
10% to 90%, ∆V
= 1.1V (Note 3)
OUT
OUT
OUT
GAIN1, Pin = 10dBm to 16dBm
GAIN2, Pin = 4dBm
350/70
185/70
120/70
50/50
V/µs
V/µs
V/µs
V/µs
GAIN4, Pin = –2dBm
GAIN8, Pin = –8dBm
Supply Voltage = 3.3V, V
10% to 90%, ∆V
= 1.1V (Note 3)
OUT
OUT
GAIN1, Pin = 10dBm to 16dBm
GAIN2, Pin = 4dBm
325/70
185/70
120/70
50/50
V/µs
V/µs
V/µs
V/µs
GAIN4, Pin = –2dBm
GAIN8, Pin = –8dBm
Demodulation Bandwidth
(Notes 4, 5)
GAIN1, V
= 500mV
= 500mV
= 500mV
= 500mV
75
52
35
15
MHz
MHz
MHz
MHz
OUT
OUT
OUT
OUT
GAIN2, V
GAIN4, V
GAIN8, V
V
V
V
V
Input Range
GAIN1 ∆V
=
100mV (Note 5)
0/225
mV
pF
OUTADJ
OUT
Load Capacitance
Output Current
Response Time
(Note 5)
10
OUT
OUT
OUT
Sourcing, R = 2k
1.7
mA
L
Supply Voltage = 5V, RFIN Step to 50% V
GAIN1, Pin = 10dBm to 16dBm
GAIN2, Pin = 4dBm
(Note 3)
OUT
7.0
9.0
11.0
14.0
ns
ns
ns
ns
GAIN4, Pin = –2dBm
GAIN8, Pin = –8dBm
Supply Voltage = 3.3V, RFIN Step to 50% V
GAIN1, Pin = 10dBm to 16dBm
GAIN2, Pin = 4dBm
(Note 3)
OUT
7.1
9.0
11.0
14.0
ns
ns
ns
ns
GAIN4, Pin = –2dBm
GAIN8, Pin = –8dBm
V
Output Voltage Swing
Supply Voltage = 3V
1.4
V
OUT
Comparator Characteristics
Comparator Response Time
Comparator Hysteresis
10dBm to 16dBm RFIN Step to V
50% (Note 3)
9
ns
mV
µA
COMP
10
I
Input Current
–2.3
VREF
RF Characteristics
RFIN Frequency Range
RFIN AC Input Resistance
RFIN Input Shunt Capacitance
RFIN Input Power Range
Digital I/O
(Note 6)
0.6 to 15
135
GHz
Ω
Frequency = 1000MHz, Power Level = 0dBm
Frequency = 1000MHz, Power Level = 0dBm
(Note 6)
0.77
pF
–24 to 16
dBm
LEN V /V
0.8
0.8
0.8
V
CCA
V
CCA
V
CCA
– 0.8
V
V
V
IL IH
G0 V /V
– 0.8
– 0.8
IL IH
G1 V /V
IL 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.
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
V
OUT Pulse Response, PIN = 8dBm
Demodulation Bandwidth
Demodulation Bandwidth vs VOUT
80
70
60
50
40
30
20
10
0
V
= 500mV
OUT
30
20
GAIN1
GAIN2
10
0
GAIN4
GAIN8
V
OUT
–10
–20
–30
–40
–50
500mV/DIV
ASK MODULATED RF
INPUT SIGNAL START
GAIN8
GAIN4
GAIN2
GAIN1
V
= 5V
CC
ASK MODULATION FREQUENCY 2.7GHz
GAIN1
85°C
350
25°C
400
–40°C
450
500
5564 G03
10ns/DIV
0.01
0.1
1
10
100
1000
300
200
250
FREQUENCY (MHz)
V
(mV)
OUT
5564 G01
5564 G02
VOUT Offset vs Temperature
GAIN1
VOUT Offset vs Supply Voltage
VOUT Pulse Response = –10dBm
400
350
300
250
350
330
310
290
270
250
230
V
= 5V
CC
GAIN8
GAIN4
GAIN2
GAIN1
3 STDEV
AVERAGE
V
OUT
50mV/DIV
ASK MODULATED RF
INPUT SIGNAL START
–3 STDEV
20
V
= 5V
CC
ASK MODULATION FREQUENCY 2.7GHz
GAIN1
5564 G04
3
3.5
4
4.5
(V)
5
5.5
10ns/DIV
–40
40
60
80
–20
0
V
TEMPERATURE (°C)
CC
5564 G05
5565 G06
V
OUT Offset vs Temperature
VOUT Offset vs Temperature
GAIN8
VOUT Offset vs Temperature
GAIN2
GAIN4
350
330
310
290
270
250
410
390
370
350
330
310
290
270
250
230
590
540
490
440
390
340
290
240
190
140
V
= 5V
V
= 5V
CC
V
= 5V
CC
CC
3 STDEV
3 STDEV
3 STDEV
AVERAGE
AVERAGE
AVERAGE
–3 STDEV
20
–3 STDEV
20
–3 STDEV
20
–40
40
60
80
–40
–20
0
40
60
80
–20
0
–40
40
60
80
–20
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
5565 G07
5565 G08
5565 G09
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LTC5564
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Supply Voltage
V
OUT vs Input Power 700MHz
VOUT vs Input Power 1.9GHz
48
46
44
42
40
38
36
34
4000
3600
3200
2800
2400
2000
1600
1200
800
4800
4400
4000
3600
3200
2800
2400
2000
1600
1200
800
V
= 5V
GAIN1, GAIN2
GAIN4, GAIN8
V
= 5V
CC
CC
GAIN1
GAIN1
= 25°C
T
A
–40°C
25°C
85°C
400
400
0
0
3
3.5
4
4.5
(V)
5
5.5
–10 –8 –6 –4
0
2
4
6
8
10
–10 –8
–2
0
2
4
6
8
10 12 14 16
–2
12 14 16
–6 –4
RFIN POWER (dBm)
V
RFIN INPUT POWER (dBm)
CC
5564 G10
5564 G24
5564 G25
V
OUT vs Input Power 2.7GHz
V
OUT vs Input Power 2.7GHz
VOUT vs Input Power 5.8GHz
3200
2800
2400
2000
1600
1200
800
3400
3200
3000
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
3600
3200
2800
2400
2000
1600
1200
800
V
= 5V
V
T
= 5V
CC
V
= 5V
CC
A
CC
GAIN1
= 25°C
GAIN1
–40°C
GAIN8
GAIN4
–40°C
85°C
25°C
25°C
85°C
GAIN1
600
GAIN2
400
400
400
200
0
0
0
8
12 16
–10
–2
0
2
4
6
8
10 12 14
16
–24 –20 –16 –12 –8 –4
0
4
–8 –6 –4
–10 –8 –6 –4 –2
0
2
4
6
8
10 12 14 16
RFIN POWER (dBm)
RFIN POWER (dBm)
RFIN POWER (dBm)
5564 G11
5564 G12
5564 G13
VOUT vs Input Power 8GHz
VOUT vs Input Power 10GHz
1600
1400
1200
1000
800
600
400
200
0
2400
2000
V
= 5V
V
= 5V
CC
CC
GAIN1
= 25°C
GAIN1
= 25°C
T
A
T
A
1600
1200
800
400
0
2
4
6
8
10 12
–24 –20 –16 –12 –8 –4
0
4
8
12 16
–10 –8 –6 –4 –2
0
14 16
RFIN INPUT POWER (dBm)
RFIN POWER (dBm)
5564 G26
5564 G27
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LTC5564
TYPICAL PERFORMANCE CHARACTERISTICS
VOUT vs Input Power 10GHz
VOUT vs Input Power 12GHz
V
OUT vs Input Power 15GHz
4800
4400
4000
3600
3200
2800
2400
2000
1600
1200
800
1000
800
600
400
0
1800
1600
1400
1200
1000
800
600
400
200
0
V
T
= 5V
V
= 5V
V
= 5V
CC
CC
A
CC
= 25°C
GAIN1
GAIN1
= 25°C
T
A
GAIN8
GAIN4
–40°C
85°C
GAIN2
GAIN1
25°C
400
0
2
4 6 8 10 12
14 16
–24 –20 –16 –12 –8 –4
0
4
8
12 16
–10 –8 –6 –4 –2
0
–10 –8 –6 –4 –2
0
2
4
6
8
10 12 14 16
RFIN POWER (dBm)
RFIN POWER (dBm)
RFIN INPUT POWER (dBm)
5564 G28
5564 G29
5564 G14
Comparator Threshold Voltage
vs RF Input Power
Comparator Rising Edge
Threshold vs Frequency
3600
3200
2800
2400
2000
1600
1200
800
2000
1800
1600
1400
1200
1000
800
V
T
= 5V
V
A
= 5V
= 25°C
CC
A
CC
= 25°C
T
FREQUENCY = 2.7GHz
RFIN = 10dBm
V
RISING
REF
600
400
0
400
–10 –6
–2
2
6
0
10
14
18
4000
8000
12000
16000
RFIN POWER (dBm)
FREQUENCY (MHz)
5564 G15
5564 G16
GAIN1 VOUT/RFIN Histogram
GAIN2 VOUT/RFIN Histogram
35
30
25
20
15
10
5
25
20
15
10
5
0
0
1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.40 1.41
2.710 2.750 2.790 2.830 2.870 2.910
GAIN (V/V)
GAIN (V/V)
5564 G17
5564 G18
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LTC5564
TYPICAL PERFORMANCE CHARACTERISTICS
GAIN4 VOUT/RFIN Histogram
GAIN8 VOUT/RFIN Histogram
GAIN2/GAIN1 Histogram
20
15
10
5
45
40
35
30
25
20
15
10
5
12
10
8
6
4
2
0
0
0
5.52
5.6
5.68
5.76
5.84
5.92
1.925 1.945 1.965 1.985 2.005 2.025
GAIN2/GAIN1
11.425 11.625 11.825 12.025 12.225 12.425
GAIN (V/V)
GAIN (V/V)
5564 G19
5564 G21
5564 G20
GAIN8/GAIN4 Histogram
GAIN4/GAIN2 Histogram
40
35
30
25
20
15
10
5
15
10
5
0
0
1.980 2.005 2.030 2.055 2.080 2.105
GAIN4/GAIN2
2.045 2.065 2.085 2.105 2.125 2.145
GAIN8/GAIN4
5564 G22
5564 G23
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LTC5564
PIN FUNCTIONS
RFIN (Pin 1): RF Input Voltage. A coupling capacitor must
be used to connect to the RF signal source. This pin has
an internal 250Ω termination, an internal Schottky diode
detector and an internal 8pF reservoir capacitor.
G0, G1 (Pins 7, 8): Amplifier Gain Selection. Logic low or
high levels on the G0 and G1 pins will change the internal
amplifiergain,bandwidthandslewratecharacteristics.See
theApplicationsInformationsectionforgainsettingcodes.
NC (Pins 2, 9, 16): No Connect. These pins should be left
V
V
V
V
V
(Pin 10): Detector Amplifier Output.
(Pin 11): High Current Power Supply Pin.
(Pin 12): Analog Power Supply Pin.
(Pin 13): Comparator Output.
OUT
CCP
CCA
unconnected by the user for best RF performance.
GND (Pins 3, 4, Exposed Pad Pin 17): These pins should
be tied to system ground. See Applications Information
for best practices.
COMP
(Pin 14): Comparator Negative Input. Apply an ex-
ternal reference voltage to this pin.
LEN(Pin5):ComparatorLatchEnableInput.V
willbe
REF
COMP
latchedwhenLENishighandtransparentwhenLENislow.
V
(Pin 15): RF Power Supply Pin.
V
(Pin 6): Amplifier Output Offset Adjust. When left
CCRF
OUTADJ
floating, the V
pin of the amplifier will be at its nominal
OUT
quiescent output offset value. See the Applications Infor-
mation section for adjustment range.
SIMPLIFIED BLOCK DIAGRAM
V
CCRF
V
V
CCP
CCA
250Ω
1.2k
RFIN
80µA
8pF
LEN
–
+
V
P
+
–
V
COMP
V
BIAS
V
V
REF
1.6k
V
+
–
OUTADJ
1.7k
OUT
PROGRAMMABLE
FEEDBACK ARRAY
200Ω
200Ω
5564 F01
PINS 3, 4,
EXPOSED PAD PIN 17
G1
G0
Figure 1. Simplified Block Diagram
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LTC5564
APPLICATIONS INFORMATION
Operation
typical V
voltage for the desired V
DC output
OUT
OUTADJ
offset in each gain setting.
The LTC5564 is a fast RF detector with a high speed
amplifier and comparator. This product integrates these
functionstoprovideRFdetectionoverfrequenciesranging
from 600MHz to 15GHz. These functions include an RF
Schottkypeakdetector,internallycompensatedoperational
amplifier, and a comparator as shown in Figure 1. The
LTC5564 has selectable amplifier gains, amplifier output
offsetadjustmentandcomparatorlatchenablecapabilities.
RF Detector
The internal temperature compensated Schottky diode
peak detector converts the RF input signal to a low
frequency signal. The detector demonstrates excellent
efficiency and linearity over a wide range of input power
levels. The Schottky diode is nominally biased at 180µA
and drives a parallel reservoir capacitor-resistor network
of 8pF and 1.2k.
Amplifier
The high speed amplifier offers four gain settings and
is capable of driving a 1.7mA load with an output swing
Comparator
The high speed comparator compares the external refer-
range of approximately 295mV to V – 1.6V. See Table 1
CC
ence voltage on the V pin to the internal signal voltage
for gain setting operation.
REF
V from the peak detector and produces the output logic
P
The V
pin provides output DC offset adjustment
OUTADJ
signal V
. V is the internal comparator positive input
COMP
P
to satisfy various interface requirements. Setting V
OUT
as shown in Figure 1.
to 500mV also provides the maximum demodulation
bandwidth in each gain mode. See Electrical and Typical
Performance Characteristics curve. See Table 1 for the
LEN provides latch enable/disable functionality as shown
in Figure 2.
Table 1. Gain Mode and Typical VOUTADJ Operation
PIN
G1
G0
GAIN MODE
GAIN1
DESCRIPTION
Minimum Gain Setting (V /RFIN ≈ 1.5dB)
REQUIRED V
FOR A GIVEN DC OUTPUT OFFSET
OUTADJ
GND
GND
GND
V
V
V
V
= 0.95 • V
– 0.174
OUT
OUTADJ
OUTADJ
OUTADJ
OUTADJ
OUT
V
CCA
GAIN2
V
OUT
V
OUT
V
OUT
/RFIN Increased 6dB
/RFIN Increased 12dB
/RFIN Increased 18dB
= (V
= (V
= (V
– 0.07)/2.10
+ 0.05)/3.16
+ 0.25)/5.26
OUT
OUT
OUT
V
V
GND
GAIN4
CCA
CCA
V
GAIN8
CCA
Note: Valid range for V
≈ 0.195V ≤ V
≤ V – 1.6
OUT
OUT
CC
LEN
V
REF
V
P
V
COMP
5564 F02
V
V
V
OUT
TRANSPARENT
OUT
OUT
TRANSPARENT
LATCHED
Figure 2. LTC5564 Comparator Latch Enable Function
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LTC5564
APPLICATIONS INFORMATION
Propagation Delay, Slew Rate and Response Time
Loading, Bypass Capacitors and Board Layout
The LTC5564 has been designed for high slew rate op-
eration. For RF input power levels of 10dBm to 16dBm
and a GAIN1 setting, the internal amplifier will slew at
350V/µs.Inagivengainsettingslewratewillbemaximized
for larger input power levels. Slew rate will degrade with
smallerRFINamplitudesignalsorwhentheamplifiergain
is increased. See Electrical Characteristics.
The LTC5564 has been designed to directly drive a capaci-
tive load of 10pF at V . When driving a capacitive load
OUT
greater than 10pF a series resistance should be added
between V
and the load to maintain good stability. This
OUT
resistance should be placed as close to V
as possible.
OUT
See Table 2 for typical series resistor values for various
capacitive loads.
The LTC5564 has been designed to function as a positive
peak detector. Consequently, the device responds to a
rising signal at the RF detector input much more rapidly
than a falling signal. Correspondingly, the rising edge of
Table 2. Typical Series Resistor Values for VOUT
Capacitive Loading
C
R SERIES
0Ω
LOAD
Up to 10pF
11pF to 20pF
40Ω
V
transitions much more rapidly than the falling edge
OUT
transitions as shown in Figure 3.
21pF to 100pF
Greater Than 100pF
68Ω
100Ω
When operating in unity gain with a 10dBm to 16dBm RF
input signal, the propagation delay to fifty percent ∆V
is approximately 7.0ns.
Good layout practice and proper use of bypass capacitors
willimprovecircuitperformanceandreducethepossibility
of measurement error. Bypass capacitors should be used
OUT
Theoperationalamplifierhasbeeninternallycompensated
for pins V
, V , V , V
and V . Bypass
CCRF CCA CCP OUTADJ REF
to provide 75MHz bandwidth with V
= 500mV and a
OUT
capacitors should be connected as close to the LTC5564
as possible. All ground return path lengths and ohmic
losses should be minimized. See Figure 5 in the Applica-
tions Information section for the demo board schematic
showing these bypass capacitances.
GAIN1 mode setting. With no RF input the output offset
will be approximately 290mV. Lowering the output offset
will degrade bandwidth performance. See the Typical
Performance Characteristics.
The LTC5564 return path for all supply currents is through
the Pin 17 exposed pad. A high resistance path from the
Pin 17 exposed pad to power supply ground will cause
a V
output offset error. Board layout and connections
OUT
V
that minimize ohmic losses from the Pin 17 exposed pad
to power supply ground will reduce this error. Measure-
ments being made relative to LTC5564 ground should be
made as close to the Pin 17 exposed pad to reduce errors.
OUT
500mV/DIV
ASK MODULATED RF
INPUT SIGNAL START
V
= 5V
CC
ASK MODULATION FREQUENCY 2.7GHz
GAIN1
5564 F03
10ns/DIV
Figure 3. VOUT Pulse Response, PIN = 8dBm
5564fa
10
LTC5564
APPLICATIONS INFORMATION
Applications
In addition to power detection, the LTC5564 may be used
as a demodulator for AM and ASK modulated signals.
Depending on the application the RSSI may be split into
twobranchestoprovideAC-coupleddata(e.g., audio)and
a DC-coupled RSSI output for signal strength measure-
ment and AGC.
TheLTC5564canbeusedasaself-standingsignalstrength
measurement receiver for a wide range of input signals
from –24dBm to 16dBm and frequencies from 600MHz
to 15GHz.
47pF
1
FROM RF MATCHING
NETWORK/ANTENNA
RFIN
10
8
11
15
DETECT
VOLTAGE
V
CCP
V
CCRF
V
CCA
V
OUT
V
CC
LTC5564
12
1000pF
10pF
3, 4, 17
GND
G1
V
LEN V
5
G0
COMP
13
REF
14
7
+
µC
DETECT
OVERVOLTAGE
EVENT
5564 F04
Figure 4. 600MHz to 15GHz Power Detector
V
CC
V
REF
1000pF
10pF
100pF
13
V
COMP
17 16
NC
RFIN
15
14
15GHz
RFIN
V
CC
V
CCRF
V
V
REF COMP
2.2pF
1
2
3
4
12
V
V
V
CCA
CCP
10pF
1000pF
0.5pF
11
10
9
NC
LTC5564
68Ω
V
GND
OUT
OUT
100pF
GND
NC
LEN V
G0
G1
OUTADJ
6
5
7
8
LEN
G1
G0
V
OUTADJ
10k
10k
10k
5564 F05
Figure 5. Demo Board Schematic Optimized for 15GHz
5564fa
11
LTC5564
PACKAGE DESCRIPTION
UD Package
16-Lead Plastic QFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1691)
0.70 ±0.05
3.50 ± 0.05
2.10 ± 0.05
1.45 ± 0.05
(4 SIDES)
PACKAGE OUTLINE
0.25 ±0.05
0.50 BSC
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
BOTTOM VIEW—EXPOSED PAD
PIN 1 NOTCH R = 0.20 TYP
OR 0.25 × 45° CHAMFER
R = 0.115
TYP
0.75 ± 0.05
3.00 ± 0.10
(4 SIDES)
15 16
PIN 1
TOP MARK
(NOTE 6)
0.40 ± 0.10
1
2
1.45 ± 0.10
(4-SIDES)
(UD16) QFN 0904
0.200 REF
0.25 ± 0.05
0.00 – 0.05
0.50 BSC
NOTE:
1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION (WEED-2)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
5564fa
12
LTC5564
REVISION HISTORY
REV
DATE
DESCRIPTION
PAGE NUMBER
A
02/11 Replaced and renamed Typical Application drawing
Added new curves to Typical Performance Characteristics
Revised Figure 5
1
5, 6
11
5564fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
13
LTC5564
TYPICAL APPLICATION
600MHz to 15GHz RF Power Detector
33pF
RF INPUT
RFIN
V
OUTADJ
V
CCA
V
CCRF
V
CCP
V
OUT
V
CC
LTC5564
1000pF
10pF
GND
G1
V
LEN
V
G0
COMP
REF
+
µC
5564 TA02
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
Schottky Peak Detectors
LTC5505
LTC5507
LTC5508
LTC5509
LTC5530
LTC5531
LTC5532
LTC5536
RF Power Detectors with >40dB Dynamic Range
100kHz to 1000MHz RF Power Detector
300MHz to 7GHz RF Power Detector
300MHz to 3GHz, Temperature Compensated, 2.7V to 6V Supply
100kHz to 1GHz, Temperature Compensated, 2.7V to 6V Supply
44dB Dynamic Range, Temperature Compensated, SC70 Package
36dB Dynamic Range, Low Power Consumption, SC70 Package
300MHz to 3GHz RF Power Detector
300MHz to 7GHz Precision RF Power Detector
300MHz to 7GHz Precision RF Power Detector
300MHz to 7GHz Precision RF Power Detector
Precision 600MHz to 7GHz RF Power Detector
with Fast Comparator Output
Precision V
Precision V
Precision V
Offset Control, Shutdown, Adjustable Gain
Offset Control, Shutdown, Adjustable Offset
Offset Control, Adjustable Gain and Offset
OUT
OUT
OUT
25ns Response Time, Comparator Reference Input, Latch Enable Input,
–26dBm to +12dBm Input Range
RF Log Detectors
LT5534
50MHz to 3GHz Log RF Power Detector with
60dB Dynamic Range
Wide Dynamic Range Log RF/IF Detector
1dB Output Variation Over Temperature, 38ns Response Time,
Log Linear Response
Low Frequency to 1GHz, 83dB Log Linear Dynamic Range
0.8dB Accuracy Over Temperature
LT®5537
LT5538
75dB Dynamic Range 3.8GHz Log RF Power Detector
RMS Detectors
LT5570
60dB Dynamic Range RMS Detector
40MHz to 2.7GHz, 0.5dB Accuracy Over Temperature
LTC5581
LTC5587
6GHz RMS Power Detector, 40dB Dynamic Range
10MHz to 6GHz RMS Detector with Digitized Output
1dB Accuracy Over Temperature, Log Linear Response, 1.4mA at 3.3V
40dB Dynamic Detection Range, Integrated 12-Bit Serial Output ADC,
1dB Accuracy Over Temperature
LTC5582
LTC5583
10GHz, 57dB Dynamic Range RMS Detector
40MHz to 10GHz Operation, 0.5dB Linearity Single-Ended RF Outputꢀ
Requires No External Balun Transformer
Up to 60dB Dynamic Range, 0.5dB Accuracy Over Temperature,
40dB Channel-to-Channel Isolation with Single-Ended RF Inputs
6GHz, Matched Dual RMS Detector Measures VSWR
5564fa
LT 0311 REV A • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
14
●
●
LINEAR TECHNOLOGY CORPORATION 2010
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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