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    參數(shù)資料
    

    


    


    
型號(hào)：
MAX148AEPP

    

    
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, PDIP20

    

    
封裝：
PLASTIC, DIP-20

    

    
文件頁(yè)數(shù)：
11/24頁(yè)

    

    
文件大?。?/td>
221K

    

    
代理商：
MAX148AEPP


    

    

    

	
    
    
    

    
    
	
    M
    +2.7V to +5.25V, Low-Power, 8-Channel, 
    S erial 10-Bit ADCs
    ______________________________________________________________________________________
    11
    Simple Software Interface
    Make sure the CPU’s serial interface runs in master
    mode so the CPU generates the serial clock. Choose a
    clock frequency from 100kHz to 2MHz.
    1) Set up the control byte for external clock mode and
    call it TB1. TB1 should be of the format: 1XXXXX11
    binary, where the Xs denote the particular channel
    and conversion mode selected.
    2) Use a general-purpose I/O line on the CPU to pull 
    CS
     low.
    3) Transmit TB1 and, simultaneously, receive a byte 
    and call it RB1. Ignore RB1.
    4) Transmit a byte of all zeros ($00 hex) and, simulta-
    neously, receive byte RB2.
    5) Transmit a byte of all zeros ($00 hex) and, simulta-
    neously, receive byte RB3.
    6) Pull 
    CS
     high.
    Figure 6 shows the timing for this sequence. Bytes RB2
    and RB3 contain the result of the conversion, padded
    with one leading zero, two sub-LSB bits, and three trail-
    ing zeros. The total conversion time is a function of the
    serial-clock frequency and the amount of idle time
    between 8-bit transfers. To avoid excessive T/H droop,
    make sure the total conversion time does not exceed
    120μs.
    Digital Output
    In unipolar input mode, the output is straight binary
    (Figure 17). For bipolar input mode, the output is twos
    complement (Figure 18). Data is clocked out at the
    falling edge of SCLK in MSB-first format.
    Cloc k Modes
    The MAX148/MAX149 may use either an external 
    serial clock or the internal clock to perform the succes-
    sive-approximation conversion. In both clock modes,
    the external clock shifts data in and out of the
    SSTRB
    CS
    SCLK
    DIN
    DOUT
    1
    4
    8
    12
    16
    20
    24
    START
    SEL2 SEL1 SEL0
    UNI/
    BIP
    DIF
    PD1
    PD0
    B9
    B8
    B7
    B6
    B5
    B4
    B3
    B2
    B1
    S0
    S1
    B0
    ACQUISITION
    1.5
    μ
    s
    (f
    SCLK
     = 2MHz)
    IDLE
    FILLED WITH 
    ZEROS
    IDLE
    CONVERSION
    t
    ACQ
    A/D STATE
    RB1
    RB2
    RB3
    Figure 6. 24-Clock External Clock Mode Conversion Timing (MICROWIRE and SPI-Compatible, QSPI-Compatible with f
    SCLK 
    ≤
     2MHz)
    SEL2
    SEL1
    SEL0
    CH0
    CH1
    CH2
    CH3
    CH4
    CH5
    CH6
    CH7
    0
    0
    0
    +
    –
    0
    0
    1
    +
    –
    0
    1
    0
    +
    –
    0
    1
    1
    +
    –
    1
    0
    0
    –
    +
    1
    0
    1
    –
    +
    1
    1
    0
    –
    +
    1
    1
    1
    –
    +
    Table 3. Channel Selection in Differential Mode (SGL/
    DIF
     = 0) 
    
    
    
    
    
    


    


    

    相關(guān)PDF資料
    		

    PDF描述
    		

    
    

    
MAX148BCAP
+2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs

    

    
MAX148BEPP
+2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs

    

    
MAX149ACAP
+2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs

    

    
MAX149AEPP
+2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs

    

    
MAX149BMJP
+2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs

    

    

    

    


    


    

    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
MAX148AEPP+
功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 8Ch 133ksps 5.25V Precision 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

    

    
MAX148AMJP
功能描述:模數(shù)轉(zhuǎn)換器 - 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

    

    
MAX148BC/D
功能描述:模數(shù)轉(zhuǎn)換器 - ADC +2.7V to +5.25V Low-Power 8-Channel Serial 10-Bit ADCs 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

    

    
MAX148BCAP
功能描述:模數(shù)轉(zhuǎn)換器 - 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

    

    
MAX148BCAP+
功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 8Ch 133ksps 5.25V Precision 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

    

    
    
    
    
	
    	
    
    
     
     
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