MAX2370ETM+ Maxim Integrated Products, MAX2370ETM+ Datasheet

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MAX2370ETM+

Manufacturer Part Number
MAX2370ETM+
Description
RF Transmitter IC TRANSMITTER QUAD-EP
Manufacturer
Maxim Integrated Products
Type
Transmitterr
Datasheet

Specifications of MAX2370ETM+

Package / Case
TQFN-48 EP
Operating Frequency
450 MHz
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX2370 integrated quadrature transmitter is
designed for 450MHz applications. The device takes a
differential I/Q baseband input and converts it up to
intermediate frequency (IF) through a quadrature modu-
lator and IF variable-gain amplifier (VGA). The signal is
then routed to an external IF filter and upconverted to RF
through an image-reject mixer and RF VGA. The signal
is further amplified with an on-chip power amplifier (PA)
driver. An IF synthesizer, an RF synthesizer, a local
oscillator buffer, and an SPI™/QSPI™/MICROWIRE™-
compatible, 3-wire programmable bus complete the
basic functional blocks of this IC.
The MAX2370 is available in a 48-pin TQFN package
with exposed paddle and is specified for the extended
temperature range (-40°C to +85°C).
19-0222; Rev 0; 5/05
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
450MHz CDMA/WCDMA Phones
OFDM, cdma2000
Wireless Data Links
Complete 450MHz Quadrature Transmitter
________________________________________________________________ Maxim Integrated Products
General Description
®
, WCDMA, NMT
Applications
o 450MHz Operating Frequency
o +8dBm Output Power
o 100dB Power-Control Range
o Dual Synthesizer for RF and IF Local Oscillators
o SPI/QSPI/MICROWIRE-Compatible 3-Wire
o Single-Sideband Upconverter
o Directly Drives External Power Amplifier
*EP = Exposed paddle.
+Denotes lead-free package.
MAX2370ETM
MAX2370ETM+ -40°C to +85°C
TOP VIEW
Interface Bus
TXGATE
V
RFOUT
CCDRV
RBIAS
PART
LOCK
IFIN+
-64dBc Typical ACPR at ±885kHz Offset
-66dBc Typical ACPR at ±1.125MHz Offset
IFIN-
IDLE
N.C.
N.C.
N.C.
V
CC
10
11
12
1
2
3
4
5
6
7
8
9
INTERFACE
-40°C to +85°C
TEMP RANGE PIN-PACKAGE
SPI
+45
90°
Σ
Ordering Information
-45
Functional Diagram
Pin Configuration/
MAX2370
48 Thin QFN-EP*
(7mm x 7mm)
48 Thin QFN-EP*
(7mm x 7mm)
RF PLL
Σ
EP
90°
/2
IF PLL
Features
36
35
34
33
32
31
30
29
28
27
26
25
T4877+3
T4877-3
CODE
REF
N.C.
N.C.
N.C.
N.C.
TANK+
TANK-
IFLO
V
SHDN
I-
I+
PKG
CC
1

Related parts for MAX2370ETM+

MAX2370ETM+ Summary of contents

Page 1

... Typical ACPR at ±1.125MHz Offset o 100dB Power-Control Range o Dual Synthesizer for RF and IF Local Oscillators o SPI/QSPI/MICROWIRE-Compatible 3-Wire Interface Bus o Single-Sideband Upconverter o Directly Drives External Power Amplifier Applications PART MAX2370ETM MAX2370ETM+ -40°C to +85°C *EP = Exposed paddle. +Denotes lead-free package. TOP VIEW RFOUT N.C. LOCK V CCDRV IDLE ...

Page 2

Complete 450MHz Quadrature Transmitter ABSOLUTE MAXIMUM RATINGS V , RFOUT CCIFCP CCRFCP V to GND.................................................-0.3V to +3.6V CCDRV CS, GC, SHDN, TXGATE, IDLE, DI, SCLK, LOCK to GND.........................................-0. Input Pins (IFIN_, Q_, ...

Page 3

Complete 450MHz Quadrature Transmitter AC ELECTRICAL CHARACTERISTICS = +2.7V to +3.3V, SHDN = IDLE = TXGATE = high, V (MAX2370 EV kit SHDN = IDLE = TXGATE = CS = 3.0V, f +85°C. Typical values are at ...

Page 4

Complete 450MHz Quadrature Transmitter AC ELECTRICAL CHARACTERISTICS (continued) = +2.7V to +3.3V, SHDN = IDLE = TXGATE = high, V (MAX2370 EV kit SHDN = IDLE = TXGATE = CS = 3.0V, f +85°C. Typical values are ...

Page 5

Complete 450MHz Quadrature Transmitter = SHDN = IDLE = TXGATE = CS = 3.0V, f (MAX2370 EV kit, V CC_ 455MHz 120MHz 10kΩ BIAS T = +25°C, unless otherwise noted OUTPUT POWER ...

Page 6

Complete 450MHz Quadrature Transmitter = SHDN = IDLE = TXGATE = CS = 3.0V, f (MAX2370 EV kit, V CC_ 455MHz 120MHz 10kΩ BIAS +25°C, unless otherwise noted OUTPUT ...

Page 7

Complete 450MHz Quadrature Transmitter PIN NAME CMOS Inputs from the 3-Wire Serial Bus (SPI/QSPI/MICROWIRE Compatible). A small RC CLK, DI, CS 13, 14, 15 lowpass filter on each of these pins can be used to reduce noise on these lines. ...

Page 8

Complete 450MHz Quadrature Transmitter PIN NAME High-Impedance RF Charge-Pump Output. Connect to the tune input of the RF VCO through the 40 RFCP RF PLL loop filter. Keep the connection from RFCP to the tune input as short as possible ...

Page 9

Complete 450MHz Quadrature Transmitter current consumption and linearity performance. The power-control range of the RF VGA is typically 44dB. The MAX2370 includes a PA driver that is optimized for the 410MHz to 500MHz RF frequency range. The PA driver is ...

Page 10

Complete 450MHz Quadrature Transmitter Internal to the IC, the charge pump has a leakage of less than 10nA. This is equivalent to a 300MΩ shunt resistor. The charge-pump output must see an extremely high DC resistance of greater than 300MΩ. ...

Page 11

Complete 450MHz Quadrature Transmitter MSB B19 RFM-DIVIDE REGISTER X RFR-DIVIDE REGISTER X IFM-DIVIDE REGISTER X IFR-DIVIDE REGISTER X CONTROL REGISTER X CONFIGURATION REGISTER X CURRENT-CONTROL REGISTER X TEST REGISTER X Figure 1. Register Configuration ______________________________________________________________________________________ 24-BIT REGISTER DATA 20 BITS ...

Page 12

Complete 450MHz Quadrature Transmitter Table 1. Register Settings for Typical Operation TYPICAL REGISTER NAME SETTINGS RFM[17:0] 23000 DEC RFR[12:0] 384 DEC IFM[13:0] 4800 DEC IFR[10:0] 384 DEC OPCTRL[15:0] 090F hex CONFIG[15:0] D03F hex I CTRL[15:0] 0C38 CC hex TEST[8:0] 100 ...

Page 13

Complete 450MHz Quadrature Transmitter Table 2. Operation Control Register (OPCTRL, Address: 0100 BIT BIT NAME LOCATION (0 = LSB) RESERVED 15 RCP_TURBO1 14 ICP_MAX 13 RESERVED 12, 11 RESERVED 10, 9 IFG RESERVED 5 BUF_EN 4 MOD_TYPE ...

Page 14

Complete 450MHz Quadrature Transmitter Table 3. Configuration Register (CONFIG, Address: 0101 BIT BIT NAME LOCATION (0 = LSB) IF_PLL_SHDN 15 RF_PLL_SHDN 14 RESERVED 13 IQ_LEVEL 12 RESERVED 11, 10 ICP 9, 8 RCP 7, 6 RESERVED 5, 4 IF_TURBO_CHARGE 3 ...

Page 15

Complete 450MHz Quadrature Transmitter Table 5. Typical Current Scale Factors Set By I_MULT Bits BIT NAME BITS 0011 0100 0101 0110 0111 I_MULT 1000 (default) 1001 1010 1011 1100 Table 7. RF Turbo Charge-Pump Current Setting RCP_TURBO1 RCP_TURBO2 0 0 ...

Page 16

Complete 450MHz Quadrature Transmitter V CC 47nH 100pF PA DUPLEXER V CC 51kΩ LOCK V CC 100pF IDLE V CC 100pF TXGATE 100pF 100pF 400Ω 120MHz 100nH BPF 9.1pF 9.1pF Figure 2. MAX2370 Typical Application Circuit 16 ______________________________________________________________________________________ MAX2335 RX ...

Page 17

Complete 450MHz Quadrature Transmitter B19 (MSB) B18 DI CLK Figure 3. 3-Wire Interface Timing Diagram ______________________________________________________________________________________ CWL CWH t > 50ns CS A0 (LSB) t > 10ns CH t > ...

Page 18

Complete 450MHz Quadrature Transmitter (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) D D/2 18 ______________________________________________________________________________________ k E/2 (NE- DETAIL A e ...

Page 19

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2005 Maxim Integrated Products ...

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