- 您現在的位置：買賣IC網 > PDF目錄373920 > AD7851KN (ANALOG DEVICES INC) 14-Bit 333 kSPS Serial A/D Converter PDF資料下載
參數資料
| 型號： | AD7851KN |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 14-Bit 333 kSPS Serial A/D Converter |
| 中文描述： | 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP24 |
| 封裝： | 0.300 INCH, PLASTIC, MO-095AG, DIP-24 |
| 文件頁數： | 12/36頁 |
| 文件大小： | 435K |
| 代理商： | AD7851KN |
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頁當前第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頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁
AD7851
–12–
REV. A
CALIBRAT ION RE GIST E RS
T he AD7851 has 10 calibration registers in all, 8 for the DAC, 1 for the offset and 1 for gain. Data can be written to or read from all
10 calibration registers. In self and system calibration the part automatically modifies the calibration registers; only if the user needs
to modify the calibration registers should an attempt be made to read from and write to the calibration registers.
Addressing the Calibration Registers
T he calibration selection bits in the control register CALSLT 1 and CALSLT 0 determine which of the calibration registers are ad-
dressed (see T able IV). T he addressing applies to both the read and write operations for the calibration registers. T he user should
not attempt to read from and write to the calibration registers at the same time.
T able IV. Calibration Register Addressing
CALSLT 1 CALSLT 0
Comment
0
0
1
1
0
1
0
1
T his combination addresses the
Gain (1)
,
Offset (1)
and
DAC Registers (8)
. T en registers in total.
T his combination addresses the
Gain (1)
and
Offset (1)
Registers. T wo registers in total.
T his combination addresses the
Offset Register
. One register in total.
T his combination addresses the
Gain Register
. One register in total.
Writing to/Reading from the Calibration Registers
For writing to the calibration registers a write to the control reg-
ister is required to set the CALSLT 0 and CALSLT 1 bits. For
reading from the calibration registers a write to the control reg-
ister is required to set the CALSLT 0 and CALSLT 1 bits, but
also to set the RDSLT 1 and RDSLT 0 bits to 10 (this addresses
the calibration registers for reading). T he calibration register
pointer is reset on writing to the control register setting the
CALSLT 1 and CALSLT 0 bits, or upon completion of all the
calibration register write/read operations. When reset it points
to the first calibration register in the selected write/read
sequence. T he calibration register pointer will point to the gain
calibration register upon reset in all but one case, this case be-
ing where the offset calibration register is selected on its own
(CALSLT 1 = 1, CALSLT 0 = 0). Where more than one cali-
bration register is being accessed, the calibration register
pointer will be automatically incremented after each calibration
register write/read operation. T he order in which the 10 calibra-
tion registers are arranged is shown in Figure 7. T he user may
abort at any time before all the calibration register write/read
operations are completed, and the next control register write
operation will reset the calibration register pointer. T he flow-
chart in Figure 8 shows the sequence for writing to the calibra-
tion registers and Figure 9 for reading.
CAL REGISTER
ADDRESS POINTER
CALIBRATION REGISTERS
GAIN REGISTER
OFFSET REGISTER
DAC 1st MSB REGISTER
DAC 8th MSB REGISTER
(1)
(2)
(3)
(10)
CALIBRATION REGISTER ADDRESS POINTER POSITION IS
DETERMINED BY THE NUMBER OF CALIBRATION REGISTERS
ADDRESSED AND THE NUMBER OF READ/WRITE OPERATIONS.
Figure 7. Calibration Register Arrangement
When reading from the calibration registers there will always be
two leading zeros for each of the registers. When operating in
serial Interface Mode 1, the read operations to the calibration
registers cannot be aborted. T he full number of read operations
must be completed (see section on serial Interface Mode 1 tim-
ing for more detail).
START
WRITE TO CAL REGISTER
(ADDR1 = 1, ADDR0 = 0)
FINISHED
LAST
REGISTER
WRITE
OPERATION
OR
ABORT
YES
NO
CAL REGISTER POINTER IS
AUTOMATICALLY RESET
WRITE TO CONTROL REGISTER SETTING STCAL = 0
AND CALSLT1, CALSLT0 = 00, 01, 10, 11
CAL REGISTER POINTER IS
AUTOMATICALLY INCREMENTED
Figure 8. Flowchart for Writing to the Calibration Registers
相關PDF資料 |
PDF描述 |
|---|---|
| AD7851KR | 14-Bit 333 kSPS Serial A/D Converter |
| AD7853LARS | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs |
| AD7853L* | Single Supply V.35 Transceiver; Package: SO; No of Pins: 28; Temperature Range: -40°C to +85°C |
| AD7853L | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs(單電源,200kSPS 12位采樣A/D轉換器) |
| AD7853 | 3 V to 5 V Single Supply, 200 KSPS 12-Bit Sampling ADCs(單電源,200kSPS 12位采樣A/D轉換器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7851KNZ | 功能描述:IC ADC 14BIT SRL 333KSPS 24-DIP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:12 采樣率（每秒）:300k 數據接口:并聯 轉換器數目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7851KR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD7851KR-REEL | 制造商:Analog Devices 功能描述: |
| AD7851KRZ | 功能描述:IC ADC 14BIT SRL 333KSPS 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:12 采樣率（每秒）:300k 數據接口:并聯 轉換器數目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7851KRZ3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit 333 kSPS Serial A/D Converter |
發布緊急采購，3分鐘左右您將得到回復。