- 您現在的位置：買賣IC網 > PDF目錄383321 > MAX149BMJP (MAXIM INTEGRATED PRODUCTS INC) +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs PDF資料下載
參數資料
| 型號： | MAX149BMJP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs |
| 中文描述： | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20 |
| 封裝： | CERDIP-20 |
| 文件頁數： | 10/24頁 |
| 文件大?。?/td> | 221K |
| 代理商： | MAX149BMJP |
M
+2.7V to +5.25V, Low-Power, 8-Channel,
S erial 10-Bit ADCs
10
______________________________________________________________________________________
How to S tart a Conversion
Start a conversion by clocking a control byte into DIN.
With
CS
low, each rising edge on SCLK clocks a bit from
DIN into the MAX148/MAX149’s internal shift register.
After
CS
falls, the first arriving logic “1” bit defines the
control byte’s MSB. Until this first “start” bit arrives, any
number of logic “0” bits can be clocked into DIN with no
effect. Table 1 shows the control-byte format.
The MAX148/MAX149 are compatible with SPI/
QSPI and MICROWIRE devices. For SPI, select the cor-
rect clock polarity and sampling edge in the SPI control
registers: set CPOL = 0 and CPHA = 0. MICROWIRE,
SPI, and QSPI all transmit a byte and receive a byte at
the same time. Using the Typical Operating Circuit, the
simplest software interface requires only three 8-bit
transfers to perform a conversion (one 8-bit transfer to
configure the ADC, and two more 8-bit transfers to clock
out the conversion result). See Figure 20 for MAX148/
MAX149 QSPI connections.
BIT
NAME
DESCRIPTION
7(MSB)
START
The first logic “1” bit after
CS
goes low defines the beginning of the control byte.
6
5
4
SEL2
SEL1
SEL0
These three bits select which of the eight channels are used for the conversion (Tables 2 and 3).
3
UNI/BIP
1 = unipolar, 0 = bipolar. Selects unipolar or bipolar conversion mode. In unipolar mode, an
analog input signal from 0V to VREF can be converted; in bipolar mode, the signal can range
from -VREF/2 to +VREF/2.
2
SGL/DIF
1 = single ended, 0 = differential. Selects single-ended or differential conversions. In single-
ended mode, input signal voltages are referred to COM. In differential mode, the voltage
difference between two channels is measured (Tables 2 and 3).
1
0(LSB)
PD1
PD0
Selects clock and power-down modes.
PD1
PD0
0
0
0
1
1
0
1
1
Mode
Full power-down
Fast power-down (MAX149 only)
Internal clock mode
External clock mode
Table 1. Control-Byte Format
BIT 7
(MSB)
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
(LSB)
START
SEL2
SEL1
SEL0
UNI/BIP
SGL/DIF
PD1
PD0
SEL2
0
SEL1
0
SEL0
0
CH0
+
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
–
1
0
0
+
–
0
0
1
+
–
1
0
1
+
–
0
1
0
+
–
1
1
0
+
–
0
1
1
+
–
1
1
1
+
–
Table 2. Channel Selection in Single-Ended Mode (SGL/
DIF
= 1)
相關PDF資料 |
PDF描述 |
|---|---|
| MAX149AMJP | +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs |
| MAX148BMJP | +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs |
| MAX148AMJP | +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs |
| MAX148AEAP | +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs |
| MAX148BEAP | +2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX14G | 制造商:Aavid Thermalloy 功能描述: |
| MAX14NG | 功能描述:散熱片 Max Clip TO220 4.5lb 14.5x13mm RoHS:否 制造商:Ampro By ADLINK 產品:Heat Sink Accessories 安裝風格:Through Hole 散熱片材料: 散熱片樣式: 熱阻: 長度: 寬度: 高度: 設計目的:Express-HRR |
| MAX-14-SEPA | 制造商:Misc 功能描述: |
| MAX15 | 功能描述:MAX CLIP RoHS:否 類別:風扇，熱管理 >> 熱敏 - 配件 系列:Max Clip System™ 標準包裝:1 系列:- 附件類型:基礎組件 適用于相關產品:Intel Pentium II Xeon 其它名稱:073974-0004073974-0004-E07397400040739740004-E73974-0004-E739740004739740004-E |
| MAX15000AEUB+ | 功能描述:電流型 PWM 控制器 w/Programmable Switching Frequency RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
發(fā)布緊急采購，3分鐘左右您將得到回復。