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PDF MAX2314EEI Data sheet ( Hoja de datos )
| Número de pieza | MAX2314EEI | |
| Descripción | CDMA IF VGAs and I/Q Demodulators with VCO and Synthesizer | |
| Fabricantes | Maxim Integrated | |
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19-1507; Rev 0a; 8/99
CDMA IF VGAs and I/Q DemodulatorsEVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
with VCO and Synthesizer
General Description
The MAX2310/MAX2312/MAX2314/MAX2316 are IF
receivers designed for dual-band, dual-mode, and sin-
gle-mode N-CDMA and W-CDMA cellular phone sys-
tems. The signal path consists of a variable gain
amplifier (VGA) and I/Q demodulator. The devices fea-
ture guaranteed +2.7V operation, a dynamic range of
over 110dB, and high input IP3 (-33dBm at 35dB gain,
1.7dBm at -35dB).
Unlike similar devices, the MAX2310 family of receivers
includes dual oscillators and synthesizers to form a
self-contained IF subsystem. The synthesizer’s refer-
ence and RF dividers are fully programmable through a
3-wire serial bus, enabling dual-band system architec-
tures using any common reference and IF frequency.
The differential baseband outputs have enough band-
width to suit both N-CDMA and W-CDMA systems, and
offer saturated output levels of 2.7Vp-p at a low +2.75V
supply voltage. Including the low-noise voltage-con-
trolled oscillator (VCO) and synthesizer, the MAX2310
draws only 26mA from a +2.75V supply in CDMA (dif-
ferential IF) mode.
The MAX2310/MAX2312/MAX2314/MAX2316 are avail-
able in 28-pin QSOP packages.
Applications
Single/Dual/Triple-Mode CDMA Handsets
Globalstar Dual-Mode Handsets
Wireless Data Links
Tetra Direct-Conversion Receivers
Wireless Local Loop (WLL)
Features
o Complete IF Subsystem Includes VCO and
Synthesizer
o Supports Dual-Band, Triple-Mode Operation
o VGA with >110dB Gain Control
o Quadrature Demodulator
o High Output Level (2.7V)
o Programmable Charge-Pump Current
o Supports Any IF Frequency Between 40MHz and
300MHz
o 3-Wire Programmable Interface
o Low Supply Voltage (+2.7V)
Ordering Information
PART
MAX2310EEI
MAX2312EEI
MAX2314EEI
MAX2316EEI
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 QSOP
28 QSOP
28 QSOP
28 QSOP
Pin Configurations appear at end of data sheet.
Block Diagram appears at end of data sheet.
Selector Guide
PART
MAX2310
MAX2312
MAX2314
MAX2316
MODE
AMPS,
Cellular CDMA,
PCS CDMA
PCS CDMA
AMPS,
Cellular CDMA
Cellular CDMA
DESCRIPTION
Dual Band, Triple Mode
Single Band, Single Mode
Single Band, Dual Mode
Single Band, Single Mode or
Single Band, Dual Mode with
External Discriminator
INPUT RANGE
40MHz to 300MHz
67MHz to 300MHz
40MHz to 150MHz
40MHz to 150MHz
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
Typical Operating Characteristics
(MAX2310/MAX2314 or MAX2312/MAX2316 EV kit, VCC = +2.75V, registers set to default power-up states, fIN = 210.88MHz for
CDMA, fIN = 85.88MHz for FM, fREF = 19.68MHz, synthesizer locked with passive 2nd-order lead-lag loop filter, SHDN = high, VGC
set for +35dB voltage gain, differential output load = 10kΩ, all power levels referred to 50Ω, TA = +25°C, unless otherwise noted.)
RECEIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
35.00
32.50
30.00
27.50
TA = +85°C
TA = +25°C
25.00
22.50
TA = -40°C
20.00
2.5
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
GAIN vs. INPUT FREQUENCY
60
55
VGC = 2.5V
50
45
40
35
30
25
20
15
0 100 200 300 400
FREQUENCY (MHz)
500
NOISE FIGURE vs. GAIN
70
60
50
40
30
20
10
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70
GAIN (dB)
RECEIVE SHUTDOWN CURRENT vs.
SUPPLY VOLTAGE
0.014
0.012
0.010
TA = +85°C
0.008
0.006
TA = +25°C
0.004
0.002
TA = -40°C
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
GAIN vs. BASEBAND FREQUENCY
60.0
59.5
59.0
58.5
58.0
57.5
57.0
56.5
56.0
0 2 4 6 8 10 12 14 16 18 20
FREQUENCY (MHz)
NOISE FIGURE vs. TEMPERATURE
7.4
7.2
7.0
6.8
6.6
6.4
6.2
6.0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
GAIN vs. VGC
80
60
40
20
0 TA = +25°C
-20 TA = -40°C
-40
TA = +85°C
-60
-80
0.5
10
0
1.0 1.5 2.0 2.5
VGC (V)
THIRD-ORDER INPUT
INTERCEPT vs. GAIN
TA = -40°C
3.0
-10
TA = +85°C
-20
-30 TA = +25°C
-40
-50
-60
-60 -40 -20 0 20 40 60 80
GAIN (dB)
VCO VOLTAGE vs. TIME
MAX2310 toc09
SHDN
VCO
VOLTAGE
LOCK
LOCK TIME
1.83ms
TIME (500µs/div)
_______________________________________________________________________________________ 5
5 Page 
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
0.033µF
10k
47pF
3300pF
0.01µF
10k 17pF
5pF 68nH
10k 18pF
DISCRIMINATOR
455kHz
VCC
47pF
LIMITER
FM
I
10k
BYP BYP
CP_OUT
GND
DIVSEL
TANKL+
BYP
STBY
CDMA+
MAX2316
TANKL- CDMA-
BUFEN
VGC
LOOUT
VCC
GND
REF
SHDN
VCC
DATA
EN
CLK
IOUT+
QOUT+
IOUT-
QOUT-
LOCK
0.01µF
0.01µF
VCC
VCC
680Ω
47pF
3-WIRE
10k
47k
Figure 2b. MAX2316 Typical Operating Circuit
VCC
CDMA
DAC
VCC
Q
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet MAX2314EEI.PDF ] | |
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