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參數(shù)資料
| 型號： | PCF8591 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit A/D and D/A converter |
| 中文描述： | 8位A / D和D / A轉(zhuǎn)換器 |
| 文件頁數(shù)： | 10/28頁 |
| 文件大小： | 221K |
| 代理商： | PCF8591 |
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1998 Jul 02
10
Philips Semiconductors
Product specification
8-bit A/D and D/A converter
PCF8591
7.4
A/D conversion
The A/D converter makes use of the successive
approximation conversion technique. The on-chip D/A
converter and a high-gain comparator are used
temporarily during an A/D conversion cycle.
An A/D conversion cycle is always started after sending a
valid read mode address to a PCF8591 device. The A/D
conversion cycle is triggered at the trailing edge of the
acknowledge clock pulse and is executed while
transmitting the result of the previous conversion (see
Fig.8).
Once a conversion cycle is triggered an input voltage
sample of the selected channel is stored on the chip and is
converted to the corresponding 8-bit binary code. Samples
picked up from differential inputs are converted to an 8-bit
two’s complement code (see Figs 9 and 10).
The conversion result is stored in the ADC data register
and awaits transmission. If the auto-increment flag is set
the next channel is selected.
The first byte transmitted in a read cycle contains the
conversion result code of the previous read cycle. After a
Power-on reset condition the first byte read is a
hexadecimal 80. The protocol of an I
2
C-bus read cycle is
shown in Chapter 8, Figs 15 and 16.
The maximum A/D conversion rate is given by the actual
speed of the I
2
C-bus.
Fig.8 A/D conversion sequence.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCF8591_03 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit A/D and D/A converter |
| PCF8591P | 制造商:NXP Semiconductors 功能描述:Codec General Purpose 1-CH 8Bit 3.3V/5V 16-Pin PDIP Bulk 制造商:NXP Semiconductors 功能描述:Codec General Purpose 1-CH 8Bit 3.3V/5V 16-Pin PDIP Bulk Bulk 制造商:NXP Semiconductors 功能描述:IC 8-BIT ADC/DAC 制造商:NXP Semiconductors 功能描述:IC, 8-BIT ADC/DAC 制造商:NXP Semiconductors 功能描述:IC, A/D AND D/A CONVERTER, 8BIT, 16-DIP; IC Function:A/D and D/A Converter; Brief Features:Low Standby Current, Auto Incremented Channel Selection, On Chip Track and Hold Circuit; Supply Voltage Min:2.5V; Supply Voltage Max:6V ;RoHS Compliant: Yes |
| PCF8591P,112 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC ADC/DAC 8-BIT I2C 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| PCF8591P112 | 制造商:NXP Semiconductors 功能描述:IC ADC-DAC 8BIT DIP-16 |
| PCF8591PN | 制造商:NXP Semiconductors 功能描述:Codec General Purpose 1-CH 8bit 3.3V/5V 16-Pin PDIP Bulk |
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