參數(shù)資料
型號: AD7851ARSZ-REEL
廠商: Analog Devices Inc
文件頁數(shù): 4/36頁
文件大?。?/td> 0K
描述: IC ADC 14BIT SRL 333KSPS 24SSOP
標(biāo)準(zhǔn)包裝: 1,500
位數(shù): 14
采樣率(每秒): 333k
數(shù)據(jù)接口: 8051,QSPI?,串行,SPI? µP
轉(zhuǎn)換器數(shù)目: 2
功率耗散(最大): 89.25mW
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: 24-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 24-SSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 1 個偽差分,單極;1 個偽差分,雙極
AD7851
–12–
REV. B
STATUS REGISTER
The arrangement of the status register is shown below. The status register is a read-only register and contains 16 bits of data. The
status register is selected by first writing to the control register and putting two 1s in RDSLT1 and RDSLT0. The function of the
bits in the status register is described below. The power-up status of all bits is 0.
WRITE TO CONTROL REGISTER
SETTING RDSLT0 = RDSLT1 = 1
READ STATUS REGISTER
START
Figure 6. Flowchart for Reading the Status Register
MSB
ZERO
BUSY
ZERO
PMGT1
PMGT0
RDSLT1
RDSLT0
2/3 MODE
X
CALMD
CALSLT1
CALSLT0
STCAL
LSB
Status Register Bit Function Descriptions
Bit No.
Mnemonic
Comment
15
ZERO
This bit is always 0.
14
BUSY
Conversion/Calibration Busy Bit. When this bit is 1, this indicates that there is a conversion or calibration
in progress. When this bit is 0, there is no conversion or calibration in progress.
13
ZERO
These four bits are always 0.
12
ZERO
11
ZERO
10
ZERO
9PMGT1
Power Management Bits. These bits along with the
SLEEP pin will indicate whether the part is in a power-
8PMGT0
down mode. (See Table VI in the Power-Down Options section for description.)
7
RDSLT1
Both these bits are always 1 indicating it is the status register that is being read. (See Table II.)
6
RDSLT0
52/
3 MODE
Interface Mode Select Bit. With this bit 0, the device is in Interface Mode 2. With this bit 1, the device is in
Interface Mode 1. This bit is reset to 0 after every read cycle.
4X
Don’t care bit.
3
CALMD
Calibration Mode Bit. A 0 in this bit indicates self-calibration is selected, and 1 in this bit indicates a system
calibration is selected (see Table III).
2
CALSLT1
Calibration Selection Bits and Start Calibration Bit. The STCAL bit is read as a 1 if a calibration is in
1
CALSLT0
progress and as a 0 if there is no calibration in progress. The CALSLT1 and CALSLT0 bits indicate which
0
STCAL
of the calibration registers are addressed for reading and writing (see the Calibration Registers section for
more details)
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