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MAX2420EAI+T

P1-P3P4-P6P7-P9P10-P12P13-P14
General Description
The MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
are highly integrated front-end ICs that provide the lowest
cost solution for cordless phones and ISM-band radios
operating in the 900MHz band. All devices incorporate
transmit and receive image-reject mixers to reduce filter
cost. They operate with a +2.7V to +4.8V power supply,
allowing direct connection to a three-cell battery stack.
The receive path incorporates an adjustable-gain LNA
and an image-reject downconverter with 35dB image
suppression. These features yield excellent combined
downconverter noise figure (4dB) and high linearity with
an input third-order intercept point (IP3) of up to +2dBm.
The transmitter consists of a variable-gain IF amplifier
with more than 35dB control range, an image-reject
upconverter with 35dB image rejection, and a power-
amplifier (PA) predriver that produces up to +2dBm (in
some applications serving as the final power stage).
All devices include an on-chip local oscillator (LO),
requiring only an external varactor-tuned LC tank for
operation. The integrated divide-by-64/65 dual-modulus
prescaler can also be set to a direct mode, in which it
acts as an LO buffer amplifier. Four separate power-
down inputs can be used for system power manage-
ment, including a 0.5µA shutdown mode. These parts
are compatible with commonly used modulation
schemes such as FSK, BPSK, and QPSK, as well as fre-
quency hopping and direct sequence spread-spectrum
systems. All devices come in a 28-pin SSOP package.
For applications using direct VCO or BPSK transmit mod-
ulation, as well as receive image rejection, consult the
MAX2424/MAX2426 data sheet. For receive-only devices,
refer to the MAX2440/MAX2441/MAX2442 data sheet.
________________________Applications
Cordless Phones Spread-Spectrum Communications
Wireless Telemetry Two-Way Paging
Wireless Networks
Features
♦ Receive/Transmit Mixers with 35dB Image Rejection
♦ Adjustable-Gain LNA
♦ Up to +2dBm Combined Receiver Input IP3
♦ 4dB Combined Receiver Noise Figure
♦ >35dB of Transmit Power Control Range
♦ PA Predriver Provides up to +2dBm
♦ Low Current Consumption: 23mA Receive
26mA Transmit
9.5mA Oscillator
♦ 0.5µA Shutdown Mode
♦ Operates from Single +2.7V to +4.8V Supply
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
________________________________________________________________ Maxim Integrated Products 1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
GND
GND
GND
TANK
TXON
PREOUT
PREGND
MOD
DIV1
VCOON
RXON
CAP2
N.C.
TXIN
LNAGAIN
TXOUT
GND
GND
RXIN
TXGAIN
RXOUT
CAP1
SSOP
TOP VIEW
MAX2420
MAX2421
MAX2422
MAX2460
MAX2463
TANK
V
CC
V
CC
V
CC
V
CC
V
CC
___________________Pin Configuration
19-1234; Rev 5; 8/03
PART
MAX2420EAI
MAX2421EAI
MAX2422EAI
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE PIN-PACKAGE
28 SSOP
28 SSOP
28 SSOP
_______________Ordering Information
MAX2460EAI
-40°C to +85°C 28 SSOP
Functional Diagram appears on last page.
MAX2463EAI
-40°C to +85°C 28 SSOP
High side
INJECTION
TYPE
f
RF
+ 10.7
LO FREQ
(MHz)
High side
High side
f
RF
+ 70
f
RF
+ 46
MAX2422
MAX2421
70
46
Low side f
RF
- 110MAX2463 110
MAX2420
PART
10.7
IF FREQ
(MHz)
______________________Selector Guide
Low side f
RF
- 10.7MAX2460 10.7
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.
EVALUATION KIT
AVAILABLE
µA
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +4.8V, no RF signals applied, LNAGAIN = TXGAIN = open, VCOON = 2.4V, RXON = TXON = MOD = DIV1 = 0.45V,
PREGND = GND, T
A
= T
MIN
to T
MAX
. Typical values are at T
A
= +25°C, V
CC
= +3.3V, unless otherwise noted.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: ≥25°C guaranteed by production test, <25°C guaranteed through correlation to worst-case temperature testing.
Note 2: Calculated by measuring the combined oscillator and prescaler supply current and subtracting the oscillator supply current.
Note 3: Calculated by measuring the combined oscillator and LO buffer supply current and subtracting the oscillator supply current.
Note 4: Calculated by measuring the combined receive and oscillator supply current and subtracting the oscillator supply current.
With LNAGAIN = GND, the supply current drops by 4.5mA.
Note 5: Calculated by measuring the combined transmit and oscillator supply current and subtracting the oscillator supply current.
V
CC
to GND...........................................................-0.3V to +5.5V
TXIN Input Power (330Ω system) ......................................-8dBm
Voltage on TXOUT......................................-0.3V to (V
CC
+ 1.0V)
Voltage on TXGAIN, LNAGAIN, TXON,
RXON, VCOON, DIV1, MOD ....................-0.3V to (V
CC
+ 0.3V)
RXIN Input Power..............................................................10dBm
TANK, TANK Input Power ...................................................2dBm
Continuous Power Dissipation (T
A
= +70°C)
SSOP (derate 9.50mW/°C above +70°C) ......................762mW
Operating Temperature Range
MAX242_EAI/MAX246_EAI................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
MIN TYP MAX UNITS
Receive Supply Current (Note 4) 23 36 mA
Prescaler Supply Current
(buffer mode) (Note 3)
5.4 8.5 mA
Oscillator Supply Current
Supply-Voltage Range 2.7 4.8 V
9.5 14 mA
Prescaler Supply Current
(divide-by-64/65 mode) (Note 2)
4.2 6 mA
CONDITIONS
RXON = 2.4V, PREGND = floating
DIV1 = 2.4V
PREGND = floating
Digital Input Voltage Low 0.45 V
Transmitter Supply Current (Note 5) 26 42 mA
0.5
RXON, TXON, DIV1, VCOON, MOD
RXON = 0.45V, TXON = 2.4V, PREGND = floating
VCOON = RXON = TXON =
MOD = DIV1 = GND
Digital Input Current ±1 ±10 µAVoltage on any one digital input = V
CC
or GND
Digital Input Voltage High V2.4RXON, TXON, DIV1, VCOON, MOD
Shutdown Supply Current
10
µA
T
A
= +25°C
T
A
= T
MIN
to T
MAX
CAUTION! ESD SENSITIVE DEVICE
LNAGAIN = 1V
AC ELECTRICAL CHARACTERISTICS
(MAX242X/246X EV kit, V
CC
= +3.3V; f
LO
= 925.7MHz (MAX2420), f
LO
= 961MHz (MAX2421), f
LO
= 985MHz (MAX2422),
f
LO
= 904.3MHz (MAX2460); f
LO
= 805MHz (MAX2463); f
RXIN
= 915MHz; P
RXIN
= -35dBm; P
TXIN
= -15dBm (330Ω); LNAGAIN = 2V;
TXGAIN = V
CC
; VCOON = 2.4V; RXON = TXON = MOD = DIV1 = PREGND = GND; T
A
= +25°C; unless otherwise noted.)
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
_______________________________________________________________________________________ 3
CONDITIONS UNITSMIN TYP MAXPARAMETER
MHz800 1000
Input Frequency Range
(Notes 6, 7)
MAX2421 36 46 55
MAX2420/MAX2460 8.5 10.7 12.5
MAX2463
MHz
86 110 132
IF Frequency Range
(Notes 6, 7)
20 22 24.5
MAX2422
dB26 35Image Frequency Rejection
55 70 85
LNAGAIN = V
CC
,
T
A
= +25°C
18 20 22.5
18 24
19.5 25
LNAGAIN = 1V 12
DIV1 = V
CC
45
LNAGAIN = V
CC
,
T
A
= T
MIN
to T
MAX
(Note 6)
LNAGAIN = GND
dB
-16
Conversion Power Gain (Note 8)
17 23
19 21 23.5
dB
12
Noise Figure (Notes 6, 8)
LNAGAIN = 1V
dBm
-8
Input Third-Order Intercept
(Notes 6, 9)
LNAGAIN = V
CC
-19 -17
(Note 10) ns500Receiver Turn-On Time
MHz800 1000
Output Frequency Range
(Notes 6, 7)
Receiver on or off dBm-60LO to RXIN Leakage
MAX2421 36 46 55
MAX2463
MHz
86 110 132
IF Frequency Range
MAX2420/MAX2460
MAX2422 55 70 85
dB
11 13.5 16
91214.5
10 12.5 15
dB26 35Image Frequency Rejection
8.5 10.7 12.5
T
A
= +25°C
81113.5
10 15.5
T
A
= T
MIN
to T
MAX
(Note 6)
814
Conversion Gain
915
10.5 16.5
LNAGAIN = 1V
dBm
-18
Input 1dB Compression
LNAGAIN = V
CC
-26
MAX2420/MAX2421/MAX2460
MAX2422
MAX2463
MAX2420/MAX2421/MAX2460
MAX2422
MAX2463
MAX2420/2460
MAX2421
MAX2422
MAX2463
MAX2420/2460
MAX2421
MAX2422
MAX2463
LNAGAIN = V
CC
LNAGAIN = 1V
RECEIVER (RXON = 2.4V)
TRANSMITTER (TXON = 2.4V)
P1-P3P4-P6P7-P9P10-P12P13-P14

MAX2420EAI+T

Mfr. #:
Buy MAX2420EAI+T
Manufacturer:
Maxim Integrated
Description:
RF Transmitter Integrated Circuits (ICs)
Lifecycle:
New from this manufacturer.
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