MAX2620EUA Datasheet Download

Part No.:
MAX2620EUA
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Download Datasheet
Description:
[10MHz to 1050MHz Integrated RF Oscillator with Buffered Outputs]
File Size:
235 K
Page:
11 Pages
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Manufacturer:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
PCB Prototype
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19-1248; Rev 2; 2/02
IT
TION K
VALUA
E
BLE
AVAILA
10MHz to 1050MHz Integrated
RF Oscillator with Buffered Outputs
____________________________Features
Low-Phase-Noise Oscillator: -110dBc/Hz
(25kHz offset from carrier) Attainable
Operates from Single +2.7V to +5.25V Supply
Low-Cost Silicon Bipolar Design
Two Output Buffers Provide Load Isolation
Insensitive to Supply Variations
Low, 27mW Power Consumption (V
CC
= 3.0V)
Low-Current Shutdown Mode: 0.1µA (typ)
_________________General Description
The MAX2620 combines a low-noise oscillator with two
output buffers in a low-cost, plastic surface-mount,
ultra-small µMAX package. This device integrates func-
tions typically achieved with discrete components. The
oscillator exhibits low-phase noise when properly
mated with an external varactor-tuned resonant tank
circuit. Two buffered outputs are provided for driving
mixers or prescalers. The buffers provide load isolation
to the oscillator and prevent frequency pulling due to
load-impedance changes. Power consumption is typi-
cally just 27mW in operating mode (V
CC
= 3.0V), and
drops to less than 0.3µW in standby mode. The MAX2620
operates from a single +2.7V to +5.25V supply.
MAX2620
________________________Applications
Analog Cellular Phones
Digital Cellular Phones
900MHz Cordless Phones
900MHz ISM-Band Applications
Land Mobile Radio
Narrowband PCS (NPCS)
_______________Ordering Information
PART
MAX2620EUA
MAX2620E/D
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
Dice*
*Dice
are tested at T
A
= +25°C, DC parameters only.
Pin Configuration appears at end of data sheet.
____________________________________________________Typical Operating Circuit
V
CC
10Ω
1000pF
10nH
1000pF
C17
1.5pF
V
TUNE
1kΩ
D1
ALPHA
SMV1204-34
CERAMIC
RESONATOR
L1
C6
C4
1pF
4 SHDN
BIAS
SUPPLY
C3
2.7pF
C5
1.5pF
1 V
CC
1
OUT 8
1.5pF
V
CC
MAX2620
2 TANK
3 FDBK
V
CC
2 7
GND
6
0.1µF
OUT TO MIXER
V
CC
OUT 5
1000pF
OUT TO SYNTHESIZER
51Ω
SHDN
1000pF
V
CC
900MHz BAND OSCILLATOR
________________________________________________________________
Maxim Integrated Products
1
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.