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參數(shù)資料
| 型號： | DS1086LU-222+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/17頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CLK GEN 22.1184MHZ AUTO 8USOP |
| 產(chǎn)品培訓(xùn)模塊： | Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 系列： | EconOscillator™ |
| 類型： | 擴(kuò)展頻譜時鐘發(fā)生器 |
| PLL： | 無 |
| 輸入： | 時鐘 |
| 輸出： | 時鐘 |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:1 |
| 差分 - 輸入:輸出： | 無/無 |
| 除法器/乘法器： | 是/無 |
| 電源電壓： | 2.7 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
3.3V Spread-Spectrum EconOscillator
10
Maxim Integrated
DS1086L
The output frequency is determined by the following
equation:
where:
min frequency of selected OFFSET range is the
lowest frequency (shown in Table 2 for the correspond-
ing offset).
DAC value is the value of the DAC register (0 to 1023).
Prescaler is the value of 2x where x = 0 to 8.
See the
Example Frequency Calculations section for a
more in-depth look at using the registers.
________________Register Definitions
The DS1086L registers are used to program the output
frequency, dither percent, dither rate, and 2-wire
address. Table 1 shows a summary of the registers and
detailed descriptions follow below.
PRESCALER (02h)
The PRESCALER word is a two-byte value containing
control bits for the prescaler (P3 to P0), output control
(Lo/HiZ), the jitter rate (JS4 to JS3), as well as control
bits for the jitter percentage (JS2 to JS0). The
PRESCALER word is read and written using two-byte
reads and writes beginning at address 02h.
JS4 to JS3: Jitter Rate. This is the frequency of the tri-
angle wave generator and the modulation frequency
that the output is dithered. It can be programmed to the
master oscillator frequency, fOSC, divided by either
8192, 4096, or 2048.
JS4
JS3
JITTER RATE
00
fOSC/8192
01
fOSC/4096 (default)
10
fOSC/2048
f
OUTPUT
MIN FREQUENCY OF SELECTED OFFSET
(
=
)
()
RANGE
DAC VALUE
kHz STEP SIZE
PRESC
+× 5
A
ALER
OFFSET
FREQUENCY RANGE (MHz)
OS - 6
30.74 to 35.86
OS - 5
33.30 to 38.42
OS - 4
35.86 to 40.98
OS - 3
38.42 to 43.54
OS - 2
40.98 to 46.10
OS - 1
43.54 to 48.66
OS*
46.10 to 51.22
OS + 1
48.66 to 53.78
OS + 2
51.22 to 56.34
OS + 3
53.78 to 58.90
OS + 4
56.34 to 61.46
OS + 5
58.90 to 64.02
OS + 6
61.46 to 66.58
*
Factory default setting. OS is the integer value of the five LSBs
of the RANGE register.
REGISTER
ADDR
MSB
BINARY
LSB
FACTORY
DEFAULT
ACCESS
PRESCALER
02h
JS4
JS3
JS2
JS1
JS0
LO/HiZ
P3
P2
0110000 0
R/W
PRESCALER
—
P1
P0
XX
00XXXXX
R/W
DAC (MSB)
08h
b9
b8
b7
b6
b5
b4
b3
b2
01111101b
R/W
DAC (LSB)
—
b1
b0
X0
00000000b
R/W
OFFSET
0Eh
X1
b4
b3
b2
b1
b0
1 1 1 - - - - - b
R/W
ADDR
0Dh
X1
WC
A2
A1
A0
11110000b
R/W
RANGE
37h
XX
b4
b3
b2
b1
b0
xxx- - - - - b
R
WRITE EE
3Fh
NO DATA
——
Table 1. Register Summary
X0 = Don’t care, reads as zero.
X1 = Don’t care, reads as one.
XX = Don’t care, reads indeterminate.
X = Don’t care.
Table 2. Offset Settings
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| DS1086LU-40S+T | 功能描述:可編程振蕩器 RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負(fù)載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
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