- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383491 > MAX7032 (Maxim Integrated Products, Inc.) Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX7032 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL |
| 中文描述： | 低成本、基于晶振的可編程ASK/FSK收發(fā)器，帶有N分頻PLL |
| 文件頁數(shù)： | 18/32頁 |
| 文件大?。?/td> | 449K |
| 代理商： | MAX7032 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
M
Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
18
______________________________________________________________________________________
Crystal Oscillator (XTAL)
The XTAL oscillator in the MAX7032 is designed to pre-
sent a capacitance of approximately 3pF between the
XTAL1 and XTAL2 pins. In most cases, this corre-
sponds to a 4.5pF load capacitance applied to the
external crystal when typical PC board parasitics are
added.
It is very important to use a crystal with a
load capacitance that is equal to the capacitance of
the MAX7032 crystal oscillator plus PC board para-
sitics.
If a crystal designed to oscillate with a different
load capacitance is used, the crystal is pulled away
from its stated operating frequency, introducing an
error in the reference frequency. Crystals designed to
operate with higher differential load capacitance
always pull the reference frequency higher.
In actuality, the oscillator pulls every crystal. The crys-
tal’s natural frequency is really below its specified fre-
quency, but when loaded with the specified load
capacitance, the crystal is pulled and oscillates at its
specified frequency. This pulling is already accounted
for in the specification of the load capacitance.
Additional pulling can be calculated if the electrical
parameters of the crystal are known. The frequency
pulling is given by:
where:
f
p
is the amount the crystal frequency is pulled in ppm.
C
m
is the motional capacitance of the crystal.
C
CASE
is the case capacitance.
C
SPEC
is the specified load capacitance.
C
LOAD
is the actual load capacitance.
When the crystal is loaded as specified, i.e., C
LOAD
=
C
SPEC
, the frequency pulling equals zero.
Serial Control Interface
Communication Protocol
The MAX7032 programs through a 3-wire interface. The
data input must follow the timing diagrams shown in
Figures 7, 8, and 9.
Note that the DIO line must be held LOW while
CS
is
high. This is to prevent the MAX7032 from entering dis-
continuous receive mode if the DRX bit is high. The
data is latched on the rising edge of SCLK, and there-
fore must be stable before that edge. The data
sequencing is MSB first, the command (C[1:0] see
Table 2), the register address (A[5:0] see Table 3), and
the data (D[7:0] see Table 4).
f
C
C
C
C
C
P
m
2
CASE
LOAD
CASE
SPEC
=
+
+
×
1
1
10
6
C[1:0]
0x0
0x1
0x2
0x3
DESCRIPTION
No operation
Write data
Read data
Master reset
Table 2. Command Bits
HI-Z
DATA OUT
CS
t
CSS
t
DS
t
DH
t
CH
t
CL
t
TH
DATA IN
t
DV
HI-Z
t
DO
t
CSH
t
TR
HI-Z
SCLK
DIO
t
CS
t
SC
D7
D0
Figure 7. Serial Interface Timing Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX7032ATJ | Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL |
| MAX708CUA-T | Analog IC |
| MAX707CUA-T | Analog IC |
| MAX707ESA-T | Analog IC |
| MAX708T | +3V Voltage Monitoring.Low-Cost.µ.P Supervisory Circuits |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7032_09 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL |
| MAX7032_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL |
| MAX7032ATJ | 制造商:Maxim Integrated Products 功能描述:LOW-COST,CRYSTAL-BASED,308MHZ,315MHZ,&433.92M - Rail/Tube |
| MAX7032ATJ+ | 功能描述:射頻收發(fā)器 Crystal-Based Prog ASK/FSK Transceiver RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| MAX7032ATJ+T | 功能描述:射頻收發(fā)器 Crystal-Based Prog ASK/FSK Transceiver RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。