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參數(shù)資料
| 型號： | PCF8591T-T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | 7.50 MM, PLASTIC, SOT162-1, SO-16 |
| 文件頁數(shù)： | 28/28頁 |
| 文件大小： | 139K |
| 代理商： | PCF8591T-T |
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2003 Jan 27
9
Philips Semiconductors
Product specication
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.9).
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
twos complement code (see Figs 10 and 11).
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 I2C-bus read cycle is
shown in Chapter 8, Figs 16 and 17.
The maximum A/D conversion rate is given by the actual
speed of the I2C-bus.
handbook, full pagewidth
S
1
A
ADDRESS
DATA BYTE 1
DATA BYTE 2
DATA BYTE 0
12
9
81
91
PROTOCOL
SCL
SDA
conversion of byte 2
conversion of byte 3
conversion of byte 1
transmission
of previously
converted byte
sampling byte 2
sampling byte 3
sampling byte 1
transmission
of byte 1
transmission
of byte 2
MBL829
Fig.9 A/D conversion sequence.
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相關代理商/技術參數(shù) |
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| PCF8593 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low power clock/calendar |
| PCF8593P | 制造商:NXP Semiconductors 功能描述:Clock/Calendar/Alarm/Timer/Interrupt Serial (I2C) Bulk 制造商:NXP Semiconductors 功能描述:IC RTC/CALENDAR 8593 DIP8 制造商:NXP Semiconductors 功能描述:IC, RTC/CALENDAR, 8593, DIP8 制造商:NXP Semiconductors 功能描述:IC, RTC/CALENDAR, 8593, DIP8; Date Format:DD:MM:YYYY; Clock Format:HH:MM:SS; Clock IC Type:Clock, Calendar; Supply Voltage Min:1V; Supply Voltage Max:6V; Digital IC Case Style:DIP; No. of Pins:8; Interface Type:I2C; Operating ;RoHS Compliant: Yes |
| PCF8593P,112 | 功能描述:實時時鐘 CLOCK/CALENDAR LOW PWR RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| PCF8593P112 | 制造商:NXP Semiconductors 功能描述:IC RTC YY-MM-DD-dd DIP-8 制造商:NXP Semiconductors 功能描述:IC RTC/CALENDAR 8593 DIP8 |
| PCF8593T | 制造商:PHILIPS-SEMI 功能描述: 制造商:NXP Semiconductors 功能描述:Real Time Clock, 8 Pin, Plastic, SOP |
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