FEATURES
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LTC5588-1
200MHz to 6000MHz
Quadrature Modulator
with Ultrahigh OIP3
DESCRIPTION
The LTC
®
5588-1 is a direct conversion I/Q modulator
designed for high performance wireless applications. It
allows direct modulation of an RF signal using differential
baseband I and Q signals. It supports LTE, GSM, EDGE,
TD-SCDMA, CDMA, CDMA2000, W-CDMA, WiMax and
other communication standards. It can also be config-
ured as an image reject upconverting mixer, by applying
90° phase-shifted signals to the I and Q inputs. The I/Q
baseband inputs drive double-balanced mixers. An on-
chip balun converts the differential mixer signals to a 50Ω
single-ended RF output. Four balanced I and Q baseband
input ports are DC-coupled with a common mode volt-
age level of 0.5V. The LO path consists of an LO buffer
with single-ended or differential inputs and precision
quadrature generators to drive the mixers. The supply
voltage range is 3.15V to 3.45V. An external voltage can
be applied to the LINOPT pin to further improve 3rd-order
linearity performance. Accurate temperature dependent
calibrations can be performed using the on-chip thermistor.
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.
*Contact LTC Marketing for other common mode voltage versions.
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Frequency Range: 200MHz to 6000MHz
Output IP3: +31dBm Typical at 2140MHz (Uncalibrated)
+35dBm Typical (User Optimized)
Single Pin Calibration to Optimize OIP3
Low Output Noise Floor at 6MHz Offset:
No RF: –160.6dBm/Hz
P
OUT
= 5dBm: –155.5dBm/Hz
Integrated LO Buffer and LO Quadrature Phase
Generator
High Impedance DC Interface to Baseband Inputs
with 0.5V Common Mode Voltage*
50Ω Single-Ended LO and RF Ports
3.3V Operation
Fast Turn-Off/On: 10ns/17ns
Temperature Sensor (Thermistor)
24-Lead UTQFN 4mm
×
4mm Package
APPLICATIONS
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LTE, GSM/EDGE, W-CDMA, TD-SCDMA, CDMA2K,
WiMax Basestations
Image Reject Upconverters
Point-to-Point Microwave Links
Broadcast Modulator
Military Radio
TYPICAL APPLICATION
200MHz to 6000MHz Direct Conversion Transmitter Application
3.3V
1nF + 4.7μF
2
RF = 200MHz
TO 6000MHz
PA
0
EN
Q-CHANNEL
Q-DAC
BASEBAND
GENERATOR
V I
LINOPT
1nF
50Ω
VCO/SYNTHESIZER
1nF
LTC2630
55881 TA01a
ACPR, AltCPR and ACPR, AltCPR
with Optimized LINOPT Voltage vs RF
Output Power at 2.14GHz for
W-CDMA 1, 2 and 4 Carriers
–40
ACPR
ACPR (OPT)
AltCPR
–50
AltCPR (OPT)
DOWNLINK TEST
MODEL 64 DPCH
–60
f
BB
= 140MHz,
f
LO
= 2280MHz
–70
4C
2C
1C
V
CC
I-DAC
V I
I-CHANNEL
90
LTC5588-1
6.8pF
0.2pF
ACPR, AltCPR (dBc)
–80
–90
–20
–15
–5
0
5
–10
RF OUTPUT POWER PER CARRIER (dBm)
55881 TA01b
55881fb
1
LTC5588-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
GNDRF
18 V
CC2
G
N
D
R
F
26
17 GNDRF
16 RF
15 NC
14 GNDRF
13 NC
7
LINOPT
8
GND
9 10 11 12
BBPQ
GNDRF
BBMQ
GND
TOP VIEW
BBMI
BBPI
V
CC1
GND
GND
Supply Voltage .........................................................3.8V
Common Mode Level of BBPI, BBMI,
and BBPQ, BBMQ...................................................0.55V
Voltage on Any Pin...........................–0.3V to V
CC
+ 0.3V
T
JMAX
.................................................................... 150°C
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
24 23 22 21 20 19
EN 1
GND 2
LOP 3
LOM 4
GND 5
NC 6
GND
25
PF24 PACKAGE
VARIATION: PF24MA
24-LEAD (4mm 4mm) PLASTIC UTQFN
T
JMAX
= 150°C,
θ
JA
= 43°C/W,
θ
JC
= 7°C/W (AT EXPOSED PAD)
EXPOSED PADS (PINS 25, 26) ARE GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC5588IPF-1#PBF
TAPE AND REEL
LTC5588IPF-1#TRPBF
PART MARKING
5881T
PACKAGE DESCRIPTION
24-Lead (4mm
×
4mm) Plastic UTQFN
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
SYMBOL
f
RF(MATCH)
f
LO(MATCH)
G
V
P
OUT
OP1dB
OIP2
OIP3
NFloor
IR
LOFT
PARAMETER
RF Match Frequency Range
LO Match Frequency Range
Conversion Voltage Gain
Absolute Output Power
Output 1dB Compression
Output 2nd-Order Intercept
Output 3rd-Order Intercept
RF Output Noise Floor
Image Rejection
Carrier Leakage (LO Feedthrough)
(Notes 4, 5)
(Notes 4, 6)
CONDITIONS
V
CC
= 3.3V, EN = 3.3V, T
A
= 25°C, LOP AC-terminated with 50Ω to ground,
BBPI, BBMI, BBPQ, BBMQ common mode DC voltage V
CMBB
= 0.5V
DC
, I and Q baseband input signal = 100kHz CW, 1V
P-P(DIFF)
each, I
and Q 90° shifted, lower sideband selection, LINOPT pin floating, unless otherwise noted. Test circuit is shown in Figure 8.
MIN
TYP
200 to 244
200 to 1500
–5.9
–1.9
5.1
77.3
28
–168.3
–27
–53
MAX
UNITS
MHz
MHz
dB
dBm
dBm
dBm
dBm
dBm/Hz
dBc
dBm
,
f
LO
= 240MHz, f
RF
= 239.9MHz, P
LO
= 10dBm, C7 = 4.7nH, C8 = 33pF Using U2 = Anaren P/N B0310J50100A00 Balun
S22 < –10dB (Note 10)
S11 < –10dB
20 • Log (V
RF(OUT)(50Ω)
/V
IN(DIFF)(I or Q)
)
1V
P-P(DIFF)
CW Signal, I and Q
No Baseband AC Input Signal (Note 3)
(Note 7)
(Note 7)
55881fb
2
LTC5588-1
ELECTRICAL CHARACTERISTICS
SYMBOL
f
RF(MATCH)
f
LO(MATCH)
G
V
P
OUT
OP1dB
OIP2
OIP3
NFloor
IR
LOFT
f
RF(MATCH)
f
LO(MATCH)
G
V
P
OUT
OP1dB
OIP2
OIP3
NFloor
IR
LOFT
PARAMETER
RF Match Frequency Range
LO Match Frequency Range
Conversion Voltage Gain
Absolute Output Power
Output 1dB Compression
Output 2nd-Order Intercept
Output 3rd-Order Intercept
RF Output Noise Floor
Image Rejection
Carrier Leakage (LO Feedthrough)
RF Match Frequency Range
LO Match Frequency Range
Conversion Voltage Gain
Absolute Output Power
Output 1dB Compression
Output 2nd-Order Intercept
Output 3rd-Order Intercept
RF Output Noise Floor
Image Rejection
Carrier Leakage (LO Feedthrough)
(Notes 4, 5)
(Notes 4, 6)
Optimized (Notes 4, 6, 11)
No Baseband AC Input Signal (Note 3)
P
OUT
= 5dBm (Note 3) P
LOM
= 10dBm
(Note 7)
(Note 7)
EN = Low (Note 7)
S22 < –10dB
S11 < –10dB
20 • Log (V
RF(OUT)(50Ω)
/V
IN(DIFF)(I or Q)
)
1V
P-P(DIFF)
CW Signal, I and Q
(Notes 4, 5)
(Notes 4, 6)
Optimized (Notes 4, 6, 11)
No Baseband AC Input Signal (Note 3)
(Note 7)
(Note 7)
(Notes 4, 5)
(Notes 4, 6)
No Baseband AC Input Signal (Note 3)
P
OUT
= 1dBm (Note 3)
(Note 7)
(Note 7)
S22 < –10dB
S11 < –10dB
20 • Log (V
RF(OUT)(50Ω)
/V
IN(DIFF)(I or Q)
)
1V
P-P(DIFF)
CW Signal, I and Q
CONDITIONS
S22 < –10dB (Note 10)
S11 < –10dB
20 • Log (V
RF(OUT)(50Ω)
/V
IN(DIFF)(I or Q)
)
1V
P-P(DIFF)
CW Signal, I and Q
V
CC
= 3.3V, EN = 3.3V, T
A
= 25°C, LOP AC-terminated with 50Ω to ground,
BBPI, BBMI, BBPQ, BBMQ common mode DC voltage V
CMBB
= 0.5V
DC
, I and Q baseband input signal = 100kHz CW, 1V
P-P(DIFF)
each, I
and Q 90° shifted, lower sideband selection, LINOPT pin floating, unless otherwise noted. Test circuit is shown in Figure 8.
MIN
TYP
350 to 468
200 to 1500
–2.6
1.4
8.6
72
30
–165.2
–159.8
–53
–45
700 to 5000
600 to 6000
0
4.0
12.1
73.6
31.3
35.1
–161.6
–155.1
–45.5
–43.1
–68.9
700 to 5000
600 to 6000
0.4
4.4
12.4
58.8
30.3
32.7
–160.6
–54.4
–40.9
MAX
UNITS
MHz
MHz
dB
dBm
dBm
dBm
dBm
dBm/Hz
dBm/Hz
dBc
dBm
MHz
MHz
dB
dBm
dBm
dBm
dBm
dBm
dBm/Hz
dBm/Hz
dBc
dBm
dBm
MHz
MHz
dB
dBm
dBm
dBm
dBm
dBm
dBm/Hz
dBc
dBm
,
f
LO
= 450MHz, f
RF
= 449.9MHz, P
LO
= 10dBm, C7 = 2.7nH, C8 = 10pF U2 = Anaren P/N B0310J50100A00 Balun
,
f
LO
= 900MHz, f
RF
= 899.9MHz, P
LOM
= 0dBm, C7 = 6.8pF C8 = 0.2pF
,
f
LO
= 1900MHz, f
RF
= 1899.9MHz, P
LOM
= 0dBm, C7 = 6.8pF C8 = 0.2pF
f
RF(MATCH)
f
LO(MATCH)
G
V
P
OUT
OP1dB
OIP2
OIP3
NFloor
IR
LOFT
RF Match Frequency Range
LO Match Frequency Range
Conversion Voltage Gain
Absolute Output Power
Output 1dB Compression
Output 2nd-Order Intercept
Output 3rd-Order Intercept
RF Output Noise Floor
Image Rejection
Carrier Leakage (LO Feedthrough)
55881fb
3
LTC5588-1
ELECTRICAL CHARACTERISTICS
SYMBOL
f
RF(MATCH)
f
LO(MATCH)
G
V
P
OUT
OP1dB
OIP2
OIP3
NFloor
IR
LOFT
f
RF(MATCH)
f
LO(MATCH)
G
V
P
OUT
OP1dB
OIP2
OIP3
NFloor
IR
LOFT
f
RF(MATCH)
f
LO(MATCH)
G
V
P
OUT
OP1dB
OIP2
OIP3
NFloor
IR
LOFT
PARAMETER
RF Match Frequency Range
LO Match Frequency Range
Conversion Voltage Gain
Absolute Output Power
Output 1dB Compression
Output 2nd Order Intercept
Output 3rd Order Intercept
RF Output Noise Floor
Image Rejection
Carrier Leakage (LO Feedthrough)
RF Match Frequency Range
LO Match Frequency Range
Conversion Voltage Gain
Absolute Output Power
Output 1dB Compression
Output 2nd-Order Intercept
Output 3rd-Order Intercept
RF Output Noise Floor
Image Rejection
Carrier Leakage (LO Feedthrough)
RF Match Frequency Range
LO Match Frequency Range
Conversion Voltage Gain
Absolute Output Power
Output 1dB Compression
Output 2nd-Order Intercept
Output 3rd-Order Intercept
RF Output Noise Floor
Image Rejection
Carrier Leakage (LO Feedthrough)
(Notes 4, 5)
(Notes 4, 6)
Optimized (Notes 4, 6, 11)
No Baseband AC Input Signal (Note 3)
(Note 7)
(Note 7)
(Notes 4, 5)
(Notes 4, 6)
Optimized (Notes 4, 6, 11)
No Baseband AC Input Signal (Note 3)
(Note 7)
(Note 7)
S22 < –10dB
S11 < –10dB
20 • Log (V
RF(OUT)(50Ω)
/V
IN(DIFF)(I or Q)
)
1V
P-P(DIFF)
CW Signal, I and Q
(Notes 4, 5)
(Notes 4, 6)
Optimized (Notes 4, 6, 11)
No Baseband AC Input Signal (Note 3)
P
OUT
= 5dBm (Note 3) P
LOM
= 10dBm
(Note 7)
(Note 7)
S22 < –10dB
S11 < –10dB
20 • Log (V
RF(OUT)(50Ω)
/V
IN(DIFF)(I or Q)
)
1V
P-P(DIFF)
CW Signal, I and Q
CONDITIONS
S22 < –10dB
S11 < –10dB
20 • Log (V
RF(OUT)(50Ω)
/V
IN(DIFF)(I or Q)
)
1V
P-P(DIFF)
CW Signal, I and Q
V
CC
= 3.3V, EN = 3.3V, T
A
= 25°C, LOP AC-terminated with 50Ω to ground,
BBPI, BBMI, BBPQ, BBMQ common mode DC voltage V
CMBB
= 0.5V
DC
, I and Q baseband input signal = 100kHz CW, 1V
P-P(DIFF)
each, I
and Q 90° shifted, lower sideband selection, LINOPT pin floating, unless otherwise noted. Test circuit is shown in Figure 8.
MIN
TYP
700 to 5000
600 to 6000
0.2
4.2
12.0
58.5
30.9
35.1
–160.6
–155.5
–56.6
–39.6
700 to 5000
600 to 6000
–0.2
3.8
11.4
61.1
29.2
39.5
–160.5
–48.8
–35.5
700 to 5000
600 to 6000
–1.0
3.0
10.5
67.6
23.5
27.5
–160.1
–36.8
–37.5
700 to 5000
600 to 6000
–9.1
–5.1
MAX
UNITS
MHz
MHz
dB
dBm
dBm
dBm
dBm
dBm
dBm/Hz
dBm/Hz
dBc
dBm
MHz
MHz
dB
dBm
dBm
dBm
dBm
dBm
dBm/Hz
dBc
dBm
MHz
MHz
dB
dBm
dBm
dBm
dBm
dBm
dBm/Hz
dBc
dBm
MHz
MHz
dB
dBm
55881fb
,
f
LO
= 2140MHz, f
RF
= 2139.9MHz, P
LOM
= 0dBm, C7 = 6.8pF C8 = 0.2pF
,
f
LO
= 2600MHz, f
RF
= 2599.9MHz, P
LOM
= 0dBm, C7 = 6.8pF C8 = 0.2pF
,
f
LO
= 3500MHz, f
RF
= 3499.9MHz, P
LOM
= 0dBm, C7 = 6.8pF C8 = 0.2pF
f
LO
= 5800MHz, f
RF
= 5799.9MHz, P
LOM
= 0dBm, C7 = 6.8pF C8 = 0.2pF
,
S22, < –10dB
f
RF(MATCH)
RF Match Frequency Range
S11, < –10dB
f
LO(MATCH)
LO Match Frequency Range
Conversion Voltage Gain
20 • Log (V
RF(OUT)(50Ω)
/V
IN(DIFF)(I or Q)
)
G
V
Absolute Output Power
1V
P-P(DIFF)
CW Signal, I and Q
P
OUT
4
LTC5588-1
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
(Notes 4, 5)
(Notes 4, 6)
No Baseband AC Input Signal (Note 3)
(Note 7)
(Note 7)
–1dB Bandwidth, R
SOURCE
= 25Ω, Single Ended
Single Ended
Single Ended
Externally Applied
No Hard Clipping, Single Ended
3.15
275
OP1dB
Output 1dB Compression
OIP2
Output 2nd-Order Intercept
OIP3
Output 3rd-Order Intercept
NFloor
RF Output Noise Floor
IR
Image Rejection
LOFT
Carrier Leakage (LO Feedthrough)
Baseband Inputs (BBPI, BBMI, BBPQ, BBMQ)
Baseband Bandwidth
BW
BB
Baseband Input Current
I
b(BB)
Input Resistance
R
IN(SE)
DC Common Mode Voltage
V
CMBB
Amplitude Swing
V
SWING
Power Supply (V
CC1
, V
CC2
)
Supply Voltage
V
CC
Supply Current
I
CC(ON)
Supply Current, Sleep Mode
I
CC(OFF)
Turn-On Time
t
ON
Turn-Off Time
t
OFF
Image Rejection Settling
t
ON(IR)
LO Suppression Settling
t
ON(LO)
t
ON(PHASE)
Phase Settling
V
LINOPT(ON)
LINOPT Voltage
V
LINOPT(OFF)
LINOPT Voltage, Sleep Mode
Enable Pin
Enable
Input High Voltage
Input High Current
Sleep
Input Low Voltage
Input Low Current
Temperature Sensor (Thermistor) (Note 14)
Thermistor Resistance
R
T
Temperature Slope
V
CC
= 3.3V, EN = 3.3V, T
A
= 25°C, LOP AC-terminated with 50Ω to ground,
BBPI, BBMI, BBPQ, BBMQ common mode DC voltage V
CMBB
= 0.5V
DC
, I and Q baseband input signal = 100kHz CW, 1V
P-P(DIFF)
each, I
and Q 90° shifted, lower sideband selection, LINOPT pin floating, unless otherwise noted. Test circuit is shown in Figure 8.
MIN
TYP
1.9
35.4
17.9
–156.7
–32.3
–30.2
430
–136
–3
0.5
0.86
3.3
303
33
17
10
80
85
70
2.56
3.3
2
80
1
33
1.385
11
3.45
325
900
MAX
UNITS
dBm
dBm
dBm
dBm/Hz
dBc
dBm
MHz
μA
kΩ
V
V
P-P
V
mA
μA
ns
ns
ns
ns
ns
V
V
V
nA
V
μA
kΩ
Ω/°C
EN = High
EN = 0V
EN = Low to High (Notes 8, 13)
EN = High to Low (Notes 9, 13)
EN = Low to High, <–60dBc (Note 13)
EN = Low to High, <–60dBm (Note 13)
EN = Low to High, Phase < 0.5°, f
LOM
= f
RF
= 2.14GHz,
Constant Board Temperature
Floating LINOPT Pin, EN = High
Floating LINOPT Pin, EN = Low
EN = High
EN = 3.3V
EN = Low
EN = 0V
EN = Low, I
RT
= 100μA
EN = Low, I
RT
= 100μA
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 LTC5588-1 is guaranteed functional over the operating
temperature range from –40°C to 85°C.
Note 3:
At 6MHz offset from the LO signal frequency. 100nF between BBPI
and BBMI, 100nF between BBPQ and BBMQ.
Note 4:
Baseband inputs are driven with 4.5MHz and 5.5MHz tones.
Note 5:
IM2 is measured at f
LO
– 10MHz.
Note 6:
IM3 is measured at f
LO
– 3.5MHz and f
LO
– 6.5MHz.
OIP3 = lowest of (1.5 • P{f
LO
-5.5MHz} – 0.5 • P{f
LO
-6.5MHz})
and (1.5 • P{f
LO
-4.5MHz} – 0.5 • P{f
LO
-3.5MHz}).
Note 7:
Without image or LO feedthrough nulling (unadjusted).
Note 8:
RF power is within 10% of final value.
Note 9:
RF power is at least 30dB down from its ON state.
Note 10:
RF matching center frequency is set below band center
frequency in order to align RF passband center frequency with band center
frequency.
Note 11:
An external voltage is optimally set at the LINOPT pin for best
output 3rd-order intercept.
Note 12:
I and Q baseband Input signal = 10MHz CW, 0.8V
P-P, DIFF
each,
I and Q 0° shifted.
Note 13:
f
LOM
= 2.14GHz, P
LOM
= 0dBm, f
BB
= 134MHz; LO feedthrough
and image rejection is nulled during previous EN = high cycles, C5 = C6 =
10pF; C13 = 0; Extra 680μF capacitors (SANYO 6SEPC680M) from TP1 to
ground and TP2 to ground, RF noise filter with 93MHz bandwidth is used.
Note 14:
Thermistor performance is guaranteed by Design.
55881fb
5
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