MAX1470EUI+ Maxim Integrated Products, MAX1470EUI+ Datasheet

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MAX1470EUI+

Manufacturer Part Number
MAX1470EUI+
Description
RF Receiver IC RECEIVER 315MHZ S superheterodyne AS
Manufacturer
Maxim Integrated Products
Type
Receiverr
Datasheet

Specifications of MAX1470EUI+

Operating Frequency
500 MHz
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Supply Current
5.5 mA
Supply Voltage (max)
3.6 V
Supply Voltage (min)
3 V
Package / Case
TSSOP-28
Frequency Range
250MHz To 500MHz
Modulation Type
ASK
Sensitivity (dbm)
-115dBm
Data Rate
100Kbps
Supply Voltage Range
3V To 3.6V
Rf Ic Case Style
TSSOP
No. Of Pins
28
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1470 is a fully integrated low-power CMOS
superheterodyne receiver for use with amplitude-shift-
keyed (ASK) data in the 315MHz band. With few
required external components, and a low-current
power-down mode, it is ideal for cost- and power-sensi-
tive applications in the automotive and consumer mar-
kets. The chip consists of a 315MHz low-noise amplifier
(LNA), an image rejection mixer, a fully integrated
315MHz phase-lock-loop (PLL), a 10.7MHz IF limiting
amplifier stage with received-signal-strength indicator
(RSSI) and an ASK demodulator, and analog baseband
data-recovery circuitry.
The MAX1470 is available in a 28-pin TSSOP package.
19-2135; Rev 1; 8/02
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.
Remote Keyless Entry
Garage Door Openers
Remote Controls
Wireless Sensors
Wireless Computer Peripherals
Security Systems
Toys
Video Game Controllers
Medical Systems
315MHz Low-Power, +3V Superheterodyne
LNASRC
LNAIN
DGND
AGND
DV
AV
________________________________________________________________ Maxim Integrated Products
DD
DD
5,10
2,7
14
13
3
4
General Description
XTAL1
DETECTOR
LNA
CRYSTAL
DIVIDE
PHASE
DRIVER
1
BY 64
XTAL2
28
MAX1470
Applications
SHUTDOWN
PWRDN
FILTER
LOOP
LNAOUT
VCO
27
6
DATAOUT
MIXIN1
25
8
SLICER
DATA
MIXIN2
9
Q
I
DSN
20
DSP
o Operates from a Single +3.0V to +3.6V Supply
o Built-In 53dB RF Image Rejection
o -115dBm Receive Sensitivity*
o 250µs Startup Time
o Low 5.5mA Operating Supply Current
o 1.25µA Low-Current Power-Down Mode for
o 250MHz to 500MHz Operating Band (Image
o Integrated PLL with On-Board Voltage-Controlled
o Selectable IF Bandwidth Through External Filter
o Complete Receive System from RF to Digital Data
*See Note 2, AC Electrical Characteristics.
Typical Application Circuit appears at end of data sheet.
Pin Configuration appears at end of data sheet.
19
90°
Efficient Power Cycling
Rejection Optimized at 315MHz)
Oscillator (VCO) and Loop Filter
Out
MAX1470EUI
DETECTOR
PART
PEAK
PDOUT
MIXOUT
26
12
IFIN1
17
OPP
-40°C to +85°C
TEMP RANGE
21
Ordering Information
100kΩ
R
Functional Diagram
DF2
IFIN2
RSSI
FILTER
DATA
18
DF
22
100kΩ
R
DF1
LIMITING
AMPS
IF
Receiver
PIN-PACKAGE
28 TSSOP
Features
1

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MAX1470EUI+ Summary of contents

Page 1

... AGND 1 28 XTAL1 XTAL2 ________________________________________________________________ Maxim Integrated Products 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. o Operates from a Single +3.0V to +3.6V Supply o Built-In 53dB RF Image Rejection o -115dBm Receive Sensitivity* o 250µs Startup Time o Low 5.5mA Operating Supply Current o 1.25µ ...

Page 2

Low-Power, +3V Superheterodyne Receiver ABSOLUTE MAXIMUM RATINGS AV to AGND ......................................................-0.3V to +4. DGND......................................................-0.3V to +4.0V DD All Other Pins Referenced to AGND...........-0. Continuous Power Dissipation (T = +70°C) A 28-Pin TSSOP (derate 13mW/°C ...

Page 3

Low-Power, +3V Superheterodyne AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, all RF inputs and outputs are referenced to 50Ω, V erwise noted.) (Note 1) PARAMETER SYMBOL Noise Figure Power Gain MIXER Input Impedance Input-Referred 3rd-Order Intercept Output Impedance Z ...

Page 4

Low-Power, +3V Superheterodyne Receiver (V = +3.3V +25°C, unless otherwise noted. Typical Application Circuit SUPPLY CURRENT vs. SUPPLY VOLTAGE 6.1 5 +85°C 5 +25°C A 5.3 5 ...

Page 5

Low-Power, +3V Superheterodyne (V = +3.3V +25°C, unless otherwise noted. Typical Application Circuit NORMALIZED IF GAIN vs. IF FREQUENCY 5 3dB BANDWIDTH = 11.7MHz 0 -5 -10 -15 - FREQUENCY (MHz) S11 ...

Page 6

Low-Power, +3V Superheterodyne Receiver PIN NAME 1 XTAL1 1st Crystal Input Positive Analog Supply Voltage for RF Sections. Decouple to AGND with 0.01µF capacitors LNAIN Low-Noise Amplifier Input Low-Noise Amplifier Source. Connect inductor to ...

Page 7

Low-Power, +3V Superheterodyne 1 ƒ = × 2π TOTAL TOTAL where TOTAL PARASITICS = + TOTAL PARASITICS L and C include inductance and PARASITICS PARASITICS capacitance of ...

Page 8

Low-Power, +3V Superheterodyne Receiver When the crystal is loaded as specified, i.e the frequency pulling equals zero. spec The data filter is implemented as a 2nd-order lowpass Sallen-Key filter. The pole locations are set by the ...

Page 9

Low-Power, +3V Superheterodyne MAX1470 DATA SLICER 25 20 DSN DATA OUT R1 C4 Figure 2. Generating Data Slicer Threshold peak detector to dynamically follow peak changes of the data filter output voltage. For faster receiver startup, the circuit shown ...

Page 10

Low-Power, +3V Superheterodyne Receiver C12 0.01µF ANTENNA (RFIN 100pF 100nH L3 15nH +3.3V L1 27nH C9 2.2pF C11 100pF C8 100pF C10 220pF 10 ______________________________________________________________________________________ +3.3V Y1 4.7547MHz 1 XTAL1 XTAL2 2 AV PWRDN DD 3 LNAIN ...

Page 11

Low-Power, +3V Superheterodyne Pin Configuration TOP VIEW XTAL1 LNAIN 3 26 LNASRC 4 25 AGND 5 24 MAX1470 LNAOUT MIXIN1 8 21 MIXIN2 9 20 AGND 10 ...

Page 12

... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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