參數(shù)資料
型號(hào): AD9251BCPZRL7-40
廠商: Analog Devices Inc
文件頁(yè)數(shù): 26/36頁(yè)
文件大?。?/td> 0K
描述: IC ADC 14BIT 40MSPS 64LFCSP
標(biāo)準(zhǔn)包裝: 750
位數(shù): 14
采樣率(每秒): 40M
數(shù)據(jù)接口: 串行,SPI?
轉(zhuǎn)換器數(shù)目: 2
功率耗散(最大): 105.5mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 64-LFCSP-VQ(9x9)
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 4 個(gè)單端,單極;2 個(gè)差分,單極
AD9251
Rev. A | Page 32 of 36
MEMORY MAP REGISTER TABLE
All address and bit locations that are not included in Table 16 are not currently supported for this device.
Table 16.
Address
(Hex)
Register
Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Value
(Hex)
Comments
Chip Configuration Registers
0x00
SPI port
configuration
(global)
0
LSB
first
Soft reset
1
Soft
reset
LSB first
0
0x18
The nibbles are
mirrored so
that LSB- or
MSB-first mode
registers
correctly,
regardless of
shift mode
0x01
Chip ID (global)
8-bit chip ID bits [7:0]
AD9251 = 0x23
Unique chip ID
used to diffe-
rentiate
devices; read
only
0x02
Chip grade
(global)
Open
Speed grade ID 6:4
20 MSPS = 000
40 MSPS = 001
65 MSPS = 010
80 MSPS = 011
Open
Unique speed
grade ID used
to differentiate
devices; read
only
Device Index and Transfer Registers
0x05
Channel index
Open
ADC B
default
ADC A
default
0x03
Bits are set to
determine
which device
on chip
receives the
next write
command; the
default is all
devices on chip
0xFF
Transfer
Open
Transfer
0x00
Synchronously
transfers data
from the
master shift
register to the
slave
Program Registers (May or May Not Be Indexed by Device Index)
0x08
Modes
External
power-
down
enable
(local)
External pin function
0x00 full power-
down
0x01 standby
(local)
Open
00 = chip run
01 = full power-
down
10 = standby
11 = chip wide
digital reset
(local)
0x80
Determines
various generic
modes of chip
operation
0x09
Clock (global)
Open
Duty
cycle
stabilize
0x00
0x0B
Clock divide
(global)
Open
Clock divider [2:0]
Clock divide ratio
000 = divide by 1
001 = divide by 2
010 = divide by 3
011 = divide by 4
100 = divide by 5
101 = divide by 6
110 = divide by 7
111 = divide by 8
0x00
The divide ratio
is the value
plus 1
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