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MAX2370ETM-T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
MAX2370
Complete 450MHz Quadrature Transmitter
4 _______________________________________________________________________________________
Note 1: Guaranteed by production test at T
A
= +25°C to +85°C, design and characterization at T
A
= -40°C.
Note 2: ACPR is met over the specified V
CM
range.
Note 3: V
CM
must be supplied by the I/Q baseband source with ±8µA current capability.
Note 4: Guaranteed by design and characterization to 6σ.
Note 5: When enabled with RCP_TURBO1 and RCP_TURBO2 (see Tables 3 and 4), the total charge-pump current is specified.
For all values of RCP, the total turbolock current is 1.63 times the corresponding nonturbo current value.
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2370 EV kit, V
CC
= +2.7V to +3.3V, SHDN = IDLE = TXGATE = high, V
GC
= 2.5V, R
BIAS
= 10kΩ, 50Ω system, T
A
= -40°C to
+85°C. Typical values are at V
CC_
= SHDN = IDLE = TXGATE = CS = 3.0V, f
REF
= 19.2MHz, LO input power = -15dBm, f
LO
= 575MHz,
f
RFOUT
= 455MHz, f
IF
= 120MHz, registers set according to Table 1, input voltage at I and Q = 130mV
RMS
differential,
cascade specifications assume 400Ω IF filter with 5dB insertion loss, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
Output Power Variation Over
Temperature
Relative to +25°C, T
A
= -40°C to +85°C
0, -2
dB
IF PLL
Reference Frequency 530
MHz
Refer ence Fr eq uency S i g nal Level 0.1 0.6
V
P-P
IF Main-Divide Ratio 256
16,383
IF Reference-Divide Ratio 2
2047
VCO Operating Range 190 to 390
MHz
ICP = 00 96 139 174
ICP = 01 135 192 240
ICP = 10 190 278 348
Charge-Pump Source/Sink
Current
ICP = 11 267 390 488
µA
Turbolock Boost Current ICP = 11, ICP_MAX = 1 533 774 968 µA
Charge-Pump Source/Sink
Current Matching
All values of ICP, over compliance range 6 %
IF Charge-Pump Compliance 0.5
V
C C I FC P
-
0.5V
V
RF PLL
RF PLL Frequency Range RF PLL operated at 2x LO frequency
1300
MHz
Reference Frequency 530
MHz
RF Main-Divide Ratio
4096 262,143
RF Reference-Divide Ratio 2
8191
RCP = 00 220 325 406
RCP = 01 441 650 813
RCP = 10 499 738 923
Charge-Pump Source/Sink
Current
RCP = 11 717
1063 1329
µA
Turbolock Boost Current (Note 5)
1152 1694 2118
µA
Charge-Pump Source/Sink
Current Matching
All values of RCP, over compliance range 6 %
RF Charge-Pump Compliance 0.5
V
C C R FC P
-
0.5V
V
Phase-Detector Noise Floor
RCP = 11, RCP_TURBO1 = RCP_TURBO2 = 0, 50kHz
comparison frequency
-162
dBc/Hz
MAX2370
Complete 450MHz Quadrature Transmitter
_______________________________________________________________________________________ 5
Typical Operating Characteristics
(MAX2370 EV kit, V
CC_
= SHDN = IDLE = TXGATE = CS = 3.0V, f
REF
= 19.2MHz, LO input power = -15dBm, f
LO
= 575MHz, f
RFOUT
=
455MHz, f
IF
= 120MHz, R
BIAS
= 10kΩ, V
GC
= 2.5V, registers set according to Table 1, input voltage at I and Q = 130mV
RMS
differential,
T
A
= +25°C, unless otherwise noted.)
-100
-40
-60
-80
-20
0
20
1.0 1.81.61.2 1.4 2.0 2.2 2.4 2.6 2.8 3.0
RF OUTPUT POWER AND SUPPLY CURRENT
vs. GAIN-CONTROL VOLTAGE
MAX2370 toc01
V
GC
(V)
RF OUTPUT POWER (dBm)
50
110
90
70
130
150
170
SUPPLY CURRENT (mA)
POWER
CURRENT
-90
-70
-80
-40
-50
-60
-10
-20
-30
0
2.1 2.32.2 2.4 2.5 2.6 2.7
IF OUTPUT POWER AND IF ACPR
vs. GAIN-CONTROL VOLTAGE
MAX2370 toc02
V
GC
(V)
IF OUTPUT POWER AND IF ACPR (dBm, dBc)
POWER
ACPR ±885kHz
ACPR ±1.125MHz
ACPR ±1.98MHz
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
2.1 2.2 2.3 2.4 2.5 2.6 2.7
RF OUTPUT POWER AND RF ACPR
vs. GAIN-CONTROL VOLTAGE
MAX2370 toc03
V
GC
(V)
RF OUTPUT POWER AND RF ACPR (dBm/dBc)
POWER
ACPR ±885kHz
ACPR ±1.125MHz
ACPR ±1.98MHz
0
15
10
5
20
25
30
400 440430410 420 450 460 470 480 490 500
RF GAIN, IMAGE SUPPRESSION, AND LO
SUPPRESSION vs. FREQUENCY
MAX2370 toc04
RF FREQUENCY
(MHz)
RF GAIN (dB)
-60
-30
-40
-50
-20
-10
0
SUPPRESSION (dBc)
LO SUPPRESSION
IMAGE SUPPRESSION
GAIN
NORMALIZED IF OUTPUT POWER vs. IFG[2:0]
MAX2370 toc05
-16
-14
-10
-12
-4
-2
-6
-8
0
NORMALIZED IF OUTPUT POWER (dB)
0231
4
567
IFG[2:0] (DECIMAL)
0
0.2
0.1
0.4
0.3
0.6
0.5
0.7
0.9
0.8
1.0
400 420 430 440410 450 460 470 490480 500
RFOUT PORT S22
MAX2370 toc06
FREQUENCY (MHz)
S22 MAGNITUDE
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
S22 PHASE (°)
MAGNITUDE
PHASE
0
0.2
0.1
0.4
0.3
0.6
0.5
0.7
0.9
0.8
1.0
1050 1100 1150 1200 1250 1300
RFPLL PORT S11
MAX2370 toc07
FREQUENCY (MHz)
S11 MAGNITUDE
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
S11 PHASE (°)
MAGNITUDE
PHASE
0
0.2
0.1
0.4
0.3
0.6
0.5
0.7
0.9
0.8
1.0
500 540 560 580520 600 620 640 680660 700
LO PORT S11
MAX2370 toc08
FREQUENCY (MHz)
S11 MAGNITUDE
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
S11 PHASE (°)
MAGNITUDE
PHASE
-100
-110
-80
-90
-60
-70
-40
-50
-30
-10
-20
FREQUENCY
IF OUTPUT SPECTRUM
MAX2370 toc9
POWER (dBm)
CENTER: 120MHz, SPAN: 5MHz, RBW: 30kHz
P
OUT
= -12dBm
MAX2370
Complete 450MHz Quadrature Transmitter
6 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1 RFOUT
Transmitter RF Output. This open-collector output requires a pullup inductor to the supply voltage,
which can be part of the output matching network.
2, 10, 11, 16,
17, 32–35,
43, 47
N.C. No Connection. Leave these pins open-circuit. Some of these pins are internally connected.
3LOCK
Open-Drain Output Indicating LOCK Status of the IF and/or the RF PLLs. Requires an external
pullup resistor. Control using configuration register bits LD_MODE[1:0].
4V
CCDRV
Power Supply for the RF Driver Stage. Bypass to PC board ground with a capacitor placed as
close to the pin as possible. Do not share capacitor ground vias with other ground connections.
5 IDLE
Digital Input. Drive to logic-high for normal operation. Logic-low on IDLE shuts down everything
except the RF PLL. A small RC lowpass filter can be used to filter digital noise.
6V
CC
Power Supply for the Upconverter Stage. Bypass to PC board ground with a capacitor placed as
close to the pin as possible. Do not share capacitor ground vias with other ground connections.
7 TXGATE
D i g i tal Inp ut. D r i ve to logic-high for nor m al op er ati on. Logic-low on TXG ATE shuts d ow n ever ythi ng
excep t the RF P LL, IF P LL, IF V C O. A sm al l RC l ow p ass can b e used to fi l ter d i g i tal noi se.
8, 9 IFIN+, IFIN-
Differential IF Inputs to the RF Upconverter. IFIN+ and IFIN- are internally biased to typically V
CC
-
1.5V. The input impedance for this port is nominally 400Ω differential. AC-couple the output of the
differential IF filter to this port. Keep the differential lines as short as possible to minimize the
effects of stray pickup.
12 RBIAS
Bias Resistor Connection. Internally biased to typically 1.18V. An external resistor must be
connected from RBIAS to ground to set the bias current for the upconverters and PA driver
stages. The nominal resistor value is 10kΩ. This value can be altered to optimize the linearity of
the driver stage.
Typical Operating Characteristics (continued)
(MAX2370 EV kit, V
CC_
= SHDN = IDLE = TXGATE = CS = 3.0V, f
REF
= 19.2MHz, LO input power = -15dBm, f
LO
= 575MHz, f
RFOUT
=
455MHz, f
IF
= 120MHz, R
BIAS
= 10kΩ, V
GC
= 2.5V, registers set according to Table 1, input voltage at I and Q = 130mV
RMS
differential,
T
A
= +25°C, unless otherwise noted.)
-90
-70
-80
-50
-60
-30
-40
-20
0
-10
10
FREQUENCY
RF OUTPUT SPECTRUM
MAX2370 toc10
POWER (dBm)
P
OUT
= +8dBm
CENTER: 455MHz, SPAN: 5MHz, RBW: 30kHz
-100
-80
-90
-60
-70
-50
-40
-20
-30
-10
239.8 239.9 240.0 240.1 240.2 240.3
IF LOCAL OSCILLATOR SPECTRUM
MAX2370 toc11
FREQUENCY
(MHz)
IF LO POWER (dBm)
P
REF
= -10dBm
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

MAX2370ETM-T

Mfr. #:
Buy MAX2370ETM-T
Manufacturer:
Maxim Integrated
Description:
RF TX IC CDMA2000 450MHZ 48WFQFN
Lifecycle:
New from this manufacturer.
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