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參數資料
| 型號： | MAX2745 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Single-Chip Global Positioning System Receiver Front-End |
| 中文描述： | 單芯片、全球定位系統前端下變頻器 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 410K |
| 代理商： | MAX2745 |
General Description
The MAX2745 complete single-chip global positioning
system (GPS) RF front-end downconverter utilizes many
innovative and leading-edge RF CMOS design tech-
niques. This high-performance, state-of-the-art device
consumes extremely low power and eliminates the
need for costly SAW and bulky discrete IF filters. The
MAX2745 incorporates a fully integrated low-noise
amplifier (LNA) and mixer, IF section, digital sampler,
and local oscillator synthesizer. The MAX2745 also pro-
vides a voltage supply for an external LNA. In addition,
the MAX2745 features a voltage booster, which can
extend the power-supply voltage to as low as 1.6V.
The MAX2745 supports both 3rd overtone crystal
designs in 32MHz and fundamental frequency crystal
designs in 16MHz, as well as a TCXO implementation.
In addition, the MAX2745 incorporates an on-chip tem-
perature sensor and crystal oscillator with trimmed
capacitors, resulting in a very accurate frequency and
additional system cost savings.
The MAX2745 is available in a space-saving 48-pin
TQFP package and is specified for the extended (-40°C
to +85°C) temperature range. The power consumption
of this device is as low as 41mW at 2.4V.
Applications
In-Vehicle Navigation Systems (IVNSs)
Location-Based Services (PDAs and
Accessories)
Telematics (Vehicle/Asset Tracking and
Inventory Management)
Recreational Handheld/Walkie Talkies
Geographical Information Systems (GISs)
Emergency Roadside Assistance
Emergency Response Systems
Digital Cameras/Camcorders
Consumer Electronics
Features
o
Complete Single-Chip GPS Radio for 16.368MHz
and 32.736MHz Floorplans
o
Single-Ended or Differential Outputs at 4.092MHz
o
Low 3.5dB Typical Noise Figure
o
No External IF SAW or Discrete Filters Required
o
On-Chip Temperature Sensor
o
2.4V to 3.6V Operational Supply Voltage Range
o
Power Consumption as Low as 41mW at 2.4V
o
Wide -40°C to +85°C Operational Temperature
Range
M
Single-Chip Global Positioning System
Receiver Front-End
________________________________________________________________
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
Ordering Information
19-3425; Rev 0; 10/04
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
-40
°
C to +85
°
C
PIN-PACKAGE
48 TQFP-EP*
MAX2745ECM
*
EP = Exposed paddle.
Block Diagram/
Pin Configuration
VCXO
BIAS
LNA/MIXER
PFD
DIVIDER
CHG
VCO
TESENSOR
VSPORT
BANDPASS FILTER
FILTER AUTOMATIC TUNING
AGC
QUANTIZER
VOLTAGE
BOOSTER
48
X
11
V
DD
12
AGC_FIL
25 V
DD
10
IEXT_LNA
7
RFIN
9
V
DD
47
X
2
CBIAS
4
30 GND
27 V
DD
20
C
19
V
1
RBIAS
3
V
DD
V
DD
5
GND
13
V
14
G
15
X
16
X
17
B
18
T
21
D
23
V
24
V
O
22
V
28 VOUT-
29 VOUT+
31 SCLK
32 V
DD
33 COE
34 CFS
35 ODS
36 BPF_CTRL
37
S
38
V
T
39
V
D
40
V
41
G
42
C
43
V
D
44
G
46
V
D
6
GND
8
GND
GND
26
45
S
MAX2745
Typical Operating Circuit appears at end of data sheet
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX2745ECM+ | 制造商:Maxim Integrated Products 功能描述:RCVR FRONT-END 48TQFP EP - Rail/Tube |
| MAX2745ECM+D | 功能描述:上下轉換器 GPS Front End Downconverter RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| MAX2745ECM+T | 制造商:Maxim Integrated Products 功能描述:RCVR FRONT-END 48TQFP EP - Tape and Reel |
| MAX2745ECM+TD | 功能描述:上下轉換器 GPS Front End Downconverter RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| MAX2745EVKIT | 功能描述:射頻開發工具 RoHS:否 制造商:Taiyo Yuden 產品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
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