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19-1248; Rev 2; 2/02
ATION
EVALU
AVAIL
KIT
ABLE
10MHz to 1050MHz Integrated
RF Oscillator with Buffered Outputs
_________________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.
________________________Applications
____________________________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)
_______________Ordering Information
Analog Cellular Phones
Digital Cellular Phones
900MHz Cordless Phones
PART
MAX2620EUA
MAX2620E/D
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 μMAX
Dice*
900MHz ISM-Band Applications
Land Mobile Radio
Narrowband PCS (NPCS)
* Dice are tested at T A = +25°C, DC parameters only.
Pin Configuration appears at end of data sheet.
____________________________________________________Typical Operating Circuit
V CC
V CC
10 ?
1000pF
10nH
1000pF
1.5pF
V TUNE
1k ?
D1
ALPHA
SMV1204-34
C17
1.5pF
CERAMIC
RESONATOR
L1
C5
1.5pF
C6
C3
2.7pF
C4
1pF
1 V CC 1
2 TANK
3 FDBK
4 SHDN
BIAS
SUPPLY
MAX2620
OUT 8
V CC 2 7
6
GND
OUT 5
0.1 μ F
V CC
1000pF
OUT TO MIXER
OUT TO SYNTHESIZER
51 ?
SHDN
900MHz BAND OSCILLATOR
1000pF
V CC
________________________________________________________________ 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.
1
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MAX2622EUA 功能描述:VCO振荡器 855MHz - 881MHz Mono V Ctrld Osc RoHS:否 制造商:Exar 封装 / 箱体:SOIC-14 频率:300 kHz 负载电容: 封装:Reel 电源电压:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作温度:0 C 最大工作温度:+ 70 C
MAX2622EUA+ 功能描述:VCO振荡器 855MHz - 881MHz Mono V Ctrld Osc RoHS:否 制造商:Exar 封装 / 箱体:SOIC-14 频率:300 kHz 负载电容: 封装:Reel 电源电压:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作温度:0 C 最大工作温度:+ 70 C
MAX2622EUA+T 功能描述:VCO振荡器 855MHz - 881MHz Mono V Ctrld Osc RoHS:否 制造商:Exar 封装 / 箱体:SOIC-14 频率:300 kHz 负载电容: 封装:Reel 电源电压:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作温度:0 C 最大工作温度:+ 70 C
MAX2622EUA-T 功能描述:VCO振荡器 855MHz - 881MHz Mono V Ctrld Osc RoHS:否 制造商:Exar 封装 / 箱体:SOIC-14 频率:300 kHz 负载电容: 封装:Reel 电源电压:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作温度:0 C 最大工作温度:+ 70 C
MAX2622EVKIT 功能描述:时钟和定时器开发工具 MAX2622 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V
MAX2623EUA 功能描述:VCO振荡器 855MHz - 950MHz Mono V Ctrld Osc RoHS:否 制造商:Exar 封装 / 箱体:SOIC-14 频率:300 kHz 负载电容: 封装:Reel 电源电压:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作温度:0 C 最大工作温度:+ 70 C
MAX2623EUA+ 功能描述:VCO振荡器 855MHz - 950MHz Mono V Ctrld Osc RoHS:否 制造商:Exar 封装 / 箱体:SOIC-14 频率:300 kHz 负载电容: 封装:Reel 电源电压:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作温度:0 C 最大工作温度:+ 70 C
MAX2623EUA+T 功能描述:VCO振荡器 855MHz - 950MHz Mono V Ctrld Osc RoHS:否 制造商:Exar 封装 / 箱体:SOIC-14 频率:300 kHz 负载电容: 封装:Reel 电源电压:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作温度:0 C 最大工作温度:+ 70 C