- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383491 > MAX7032ATJ (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： | MAX7032ATJ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, QCC32 |
| 封裝： | 5 X 5 MM, TQFN-32 |
| 文件頁數(shù)： | 25/32頁 |
| 文件大?。?/td> | 449K |
| 代理商： | MAX7032ATJ |
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頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當前第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
The AGC dwell time is dependent on the crystal fre-
quency and the bit settings of the AGC dwell timer. To
calculate the dwell time, use the following equation:
where K is an odd integer in decimal from 9 to 23; see
Table 11.
To calculate the value of K, use the following equation
and use the next odd integer higher than the calculated
result:
K
≥
3.3 x log
10
(Dwell Time x f
XTAL
)
For Manchester Code (50% duty cycle), set the dwell
time to at least twice the bit period. For NRZ data, set
the dwell to greater than the period of the longest string
of zeros or ones. For example, using Manchester Code
at 315MHz (f
XTAL
= 12.679MHz) with a data rate of
4kbps (bit period = 125μs), the dwell time needs to be
greater than 250μs:
K
≥
3.3 x log
10
(250μs x 12.679MHz)
≈
11.553
Choose the register value to be the next odd integer value
higher than 11.553, which is K = 13. The default value of
the AGC dwell timer on power-up or rest is zero (K = 9).
Calibration
The MAX7032 must be calibrated to ensure accurate
timing of the off timer in discontinuous receive mode or
when receiving FSK signals. The first step in calibration
is ensuring that the oscillator frequency register (regis-
ter: 0x05) has been programmed with the correct divi-
sor value (see the
Oscillator Frequency Register
section). Next, enable the mixer to turn the crystal dri-
ver on.
Calibrate the polling timer by setting PCAL = 1 in the
control register (register 0x01, bit 3). Upon completion,
the PCALD bit in the status register (register 0x1A,
bit 1) is 1, and the PCAL bit is reset to zero. If using the
MAX7032 in continuous receive mode, polling timer
calibration is not needed.
To calibrate the FSK receiver, set FCAL = 1. Upon
completion, the FCALD bit in the status register (regis-
ter 0x08) is one, and the FCAL bit is reset to zero.
When in continuous receive mode and receiving FSK
data, recalibrate the FSK receiver after a significant
change in temperature or supply voltage. An autocal fea-
ture is provided that performs a calibration every minute
(ACAL bit, Table 8). When in discontinuous receive
mode, the polling timer and FSK receiver (if enabled) are
automatically calibrated every wake-up cycle.
Off Timer (t
OFF
)
The off timer, t
OFF
(see Figure 10), is a 16-bit timer that
is configured using register 0x06 for the upper byte,
register 0x07 for the lower byte, and bits OFPS1 and
OFPS0 in the configuration 0 register (register 0x02, bit
3 and bit 2, respectively). Table 12 summarizes the
configuration of the t
OFF
timer. The OFPS1 and OFPS0
bits set the size of the shortest time possible (t
OFF
time
base). The data written to the t
OFF
registers (register
0x06 and register 0x07) are multiplied by the time base
to give the total t
OFF
time. See the example below. On
power-up, the off-timer registers are reset to zero and
must be written before using DRX mode.
Dwell Time
f
K
XTAL
=
2
M
Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
______________________________________________________________________________________
25
DT2
0
0
0
0
1
1
1
1
DT1
0
0
1
1
0
0
1
1
DT0
0
1
0
1
0
1
0
1
DESCRIPTION
K = 9
K = 11
K = 13
K = 15
K = 17
K = 19
K = 21
K = 23
Table 11. AGC Dwell Timer Configuration
(Address 0x03)
OFPS1
OFPS0
t
OFF
TIME BASE
MIN t
OFF
REG 0x06 = 0x00;
REG 0x07 = 0x01
120μs
480μs
1.92ms
7.68ms
MAX t
OFF
REG 0x06 = 0xFF;
REG 0x07 = 0xFF
7.86s
31.46s
2 min 6s
8 min 23s
0
0
1
1
0
1
0
1
120μs
480μs
1920μs
7680μs
Table 12. Off-Timer (t
OFF
) Configuration
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX708CUA-T | Analog IC |
| MAX707CUA-T | Analog IC |
| MAX707ESA-T | Analog IC |
| MAX708T | +3V Voltage Monitoring.Low-Cost.µ.P Supervisory Circuits |
| MAX708TCUA-T | Analog IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| MAX7032ATJ+TWC6L | 功能描述:射頻接收器 Low-CostCrystal-Based308MHz315MHz&433.92MHz FSK Trans w Fractional-N PLL RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| MAX7032ATJ+WC6L | 功能描述:射頻接收器 LINX CUSTOM PART WITH INCORRECT MARKING RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| MAX7032ATJ-T | 制造商:Maxim Integrated Products 功能描述:LOW-COST,CRYSTAL-BASED,308MHZ,315MHZ,&433.92M - Tape and Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。