參數(shù)資料
型號： ADS8517IDWR
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO28
封裝： GREEN, PLASTIC, SOIC-28
文件頁數(shù)： 9/38頁
文件大?。?/td> 948K
代理商： ADS8517IDWR
Serial Output
Internal Data Clock (During a Conversion)
www.ti.com ................................................................................................................................................. SLAS527A – SEPTEMBER 2008 – REVISED JUNE 2009
Parallel Output (During a Conversion)
After conversion N has been initiated, valid data from conversion N–1 can be read and are valid up to 2.2
s
after the start of conversion N. Do not attempt to read data beyond 2.2
s after the start of conversion N until
BUSY (pin 24) goes high; doing so may result in reading invalid data. Refer to Table 5, Figure 30, and Figure 31
for timing constraints.
Table 5. Conversion and Data Timing with Parallel Interface at TA = –40°C to +85°C
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
t1
Convert pulse width
0.04
5
s
t2
Data valid delay after R/C low
2.3
2.5
s
t3
BUSY delay from start of conversion
20
85
ns
t4
BUSY low
2.3
2.5
s
t5
BUSY delay after end of conversion
90
ns
t6
Aperture delay
40
ns
t7
Conversion time
1.8
2.2
s
t8
Acquisition time
2.7
s
t9
Bus relinquish time
10
83
ns
t10
BUSY delay after data valid
20
60
ns
t11
Previous data valid after start of conversion
1.8
2.2
s
t21
R/C to CS setup time
10
ns
t7 + t8
Throughput time
5
s
Data can be clocked out with the internal data clock or an external data clock. When using the serial output, be
careful with the parallel outputs, D7-D0 (pins 9-13 and 15-17), because these pins come out of a High-Z state
whenever CS (pin 23) is low and R/C (pin 22) is high. The serial output cannot be 3-stated and is always active.
Refer to the Applications Information section for specific serial interfaces. If an external clock is used, the TAG
input can be used to daisy-chain multiple ADS8517 data pins together.
To use the internal data clock, tie EXT/INT (pin 8) low. The combination of R/C (pin 22) and CS (pin 23) low
initiates conversion N and activates the internal data clock (typically, a 900-kHz clock rate). The ADS8517
outputs 16 bits of valid data, MSB first, from conversion N–1 on SDATA (pin 19), synchronized to 16 clock pulses
output on DATACLK (pin 18). The data are valid on both the rising and falling edges of the internal data clock.
The rising edge of BUSY (pin 24) can be used to latch the data. After the 16th clock pulse, DATACLK remains
low until the next conversion is initiated, while SDATA returns to the state of the TAG pin input sensed at the
start of transmission. Refer to Table 6 and Figure 33 for more information.
Copyright 2008–2009, Texas Instruments Incorporated
17
Product Folder Link(s): ADS8517
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ADS8517IDWRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16B,5V,125KSPS,ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS8517IPW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Lo Pwr 16B 200kSPS +/-10V Bip InSAR ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS8517IPWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Lo Pwr 16B 200kSPS +/-10V Bip InSAR ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS8517W 制造商:TI 制造商全稱:Texas Instruments 功能描述:16-Bit, 200-kSPS, Low-Power, Sampling ANALOG-TO-DIGITAL CONVERTER with Internal Reference and Parallel/Serial Interface
ADS8519 制造商:TI 制造商全稱:Texas Instruments 功能描述:16-BIT 250-KSPS SERIAL CMOS SAMPLING ANALOG-TO-DIGITAL CONVERTER
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