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參數(shù)資料
| 型號： | AD7858L |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC(單電源,200kSPS 8通道12位采樣A/D轉換器) |
| 中文描述： | 3 V至5 V單電源，200 kSPS的8通道，12位采樣ADC（單電源，速度高達200ksps的8通道12位采樣的A / D轉換器） |
| 文件頁數(shù)： | 29/32頁 |
| 文件大?。?/td> | 299K |
| 代理商： | AD7858L |
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AD7858/AD7858L
REV. A
–29–
A typical sequence of events would be writing to the control
register via the DIN line setting a conversion start and at the
same time reading data from the previous conversion on the
DOUT line (both the read and write operations would each be
two 8-bit operations, one 16-bit operation for the 68HC16),
wait for the conversion to be finished (= 4.6
μ
s for AD7858
with 4 MHz CLKIN), and then repeat the sequence. The maxi-
mum serial frequency will be determined by the data access and
hold times of the
μ
Controllers and the AD7858/AD7858L.
AD7858/AD7858L to ADSP-21xx Interface
Figure 39 shows the AD7858/AD7858L interface to the ADSP-
21xx. The ADSP-21xx is the master and the AD7858/AD7858L
is the slave. The AD7858/AD7858L is in Interface Mode 2.
For the ADSP-21xx the bits in the serial port control register
should be set up as TFSR = RFSR = 1 (need a frame sync for
every transfer), SLEN = 15 (16-bit word length), TFSW =
RFSW = 1 (alternate framing mode for transmit and receive
operations), INVRFS = INVTFS = 1 (active low RFS and
TFS), IRFS = 0, ITFS = 1 (External RFS and internal TFS),
and ISCLK = 1 (internal serial clock). The CLKIN and
CONVST
signals can be supplied from the ADSP-21xx or
from an external source. The serial clock from the ADSP-21xx
must be inverted before the SCLK pin of the AD7858/AD7858L.
This SCLK could also be used to drive the CLKIN input of the
AD7858/AD7858L. The BUSY signal indicates when the con-
version is finished and may not be required. The data access
and hold times of the ADSP-21xx and the AD7858/AD7858L
allow for a serial clock of 4 MHz/1.8 MHz at 5 V and 3.3 MHz/
1.8 MHz at 3 V supplies.
ADSP-21xx
CONVST
CLKIN
DOUT
DIN
SYNC
OPTIONAL
4MHz/1.8MHz
BUSY
IRQ
MASTER
SLAVE
TFS
DT
SCK
SCLK
RFS
DR
OPTIONAL
AD7858/AD7858L
Figure 39. ADSP-21xx Interface
AD7858/AD7858L to DSP56000/1/2/L002 Interface
Figure 40 shows the AD7858/AD7858L to DSP56000/1/2/
L002 interface. Here the DSP5600x is the master and the
AD7858 is the slave. The AD7858/AD7858L is in Interface
Mode 2. The DSP56L002 is used when the AD7858/AD7858L
is being operated at 3 V. The setting of the bits in the registers
of the DSP5600x would be for synchronous operation (SYN =
1), internal frame sync (SCD2 = 1), gated internal clock (GCK
= 1, SCKD = 1), 16-bit word length (WL1 = 1, WL0 = 0). Since
a gated clock is used here the SCLK cannot be tied to the CLKIN
of the AD7858/AD7858L. The SCLK from the DSP5600x
must be inverted before it is applied to the AD7858/AD7858L.
Again the data access and hold times of the DSP5600x and
the AD7858/AD7858L allows for a SCLK of 4 MHz/1.8 MHz.
DSP56000/1/2/L002
SRD
CONVST
CLKIN
SCLK
DIN
SYNC
OPTIONAL
BUSY
IRQ
MASTER
SLAVE
OPTIONAL
DOUT
SC2
STD
SCK
4MHz/1.8MHz
AD7858/AD7858L
Figure 40. DSP56000/1/2 Interface
相關PDF資料 |
PDF描述 |
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| AD7858 | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC(單電源,200kSPS 8通道12位采樣A/D轉換器) |
| AD7859AP | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs |
| AD7859AS | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs |
| AD7859BS | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs |
| AD7859L* | 5V Low Power RS232 Transceiver; Package: PDIP; No of Pins: 16; Temperature Range: 0°C to +70°C |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD7858LAN | 制造商:Analog Devices 功能描述: |
| AD7858LAN3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC |
| AD7858LANZ | 功能描述:IC ADC 12BIT 8CHAN SRL 24DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)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(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7858LAR | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 12-bit Serial 24-Pin SOIC W |
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