參數(shù)資料
型號(hào)： AD7854BRZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 2/28頁(yè)
文件大?。?/td> 0K
描述： IC ADC 12BIT PARALLEL LP 28-SOIC
產(chǎn)品變化通告： Product Discontinuance 27/Oct/2011
標(biāo)準(zhǔn)包裝： 27
位數(shù)： 12
采樣率（每秒）： 200k
數(shù)據(jù)接口： 并聯(lián)
轉(zhuǎn)換器數(shù)目： 2
功率耗散（最大）： 30mW
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： 28-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 28-SOIC W
包裝： 管件
輸入數(shù)目和類型： 1 個(gè)偽差分，單極；1 個(gè)偽差分，雙極
AD7854/AD7854L
–10–
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 writing to the control register and putting two 1s in RDSLT1 and RDSLT0. The function of the bits in
the status register are described below. The power-up status of all bits is 0.
START
READ STATUS REGISTER
WRITE TO CONTROL REGISTER
SETTING RDSLT0 = RDSLT1 = 1
Figure 4. Flowchart for Reading the Status Register
MSB
ZERO
PMGT1
PMGT0
ONE
AMODE
BUSY
CALMD
CALSLT1
CALSLT0
STCAL
LSB
Status Register Bit Function Description
Bit
Mnemonic
Comment
15
ZERO
These six bits are always 0.
14
ZERO
13
ZERO
12
ZERO
11
ZERO
10
ZERO
9
PMGT1
Power Management Bits. These bits will indicate if the part is in a power-down mode or not. See Table VI
8
PMGT0
in Power-Down Section for description.
7
ONE
Both these bits are always 1.
6
ONE
5
AMODE
Analog Mode Bit. When this bit is a 0, the device is set up for the unipolar analog input range. When this
bit is a 1, the device is set up for the bipolar analog input range.
4
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.
3
CALMD
Calibration Mode Bit. A 0 in this bit indicates a self-calibration is selected, and a 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
0
STCAL
which of the calibration registers are addressed for reading and writing (see section on the Calibration
Registers for more details).
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AD7854LAR-REEL 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 12-bit Parallel 28-Pin SOIC W T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 100KSPS 12-BIT PARALLEL 28SOIC W - Tape and Reel
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