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    參數(shù)資料
    

    


    


    
型號(hào)：
MAX1246BCPE+

    

    
廠商：
Maxim Integrated Products

    

    
文件頁(yè)數(shù)：
4/25頁(yè)

    

    
文件大小：
0K

    

    
描述：
IC ADC 12BIT SERIAL 16-DIP

    

    
產(chǎn)品培訓(xùn)模塊：
Lead (SnPb) Finish for COTS
    
	Obsolescence Mitigation Program
    		

    

    
標(biāo)準(zhǔn)包裝：
25

    

    
位數(shù)：
12
    		

    

    
采樣率（每秒）：
133k
    		

    

    
數(shù)據(jù)接口：
MICROWIRE?，QSPI?，串行，SPI?
    		

    

    
轉(zhuǎn)換器數(shù)目：
1
    		

    

    
功率耗散（最大）：
842mW
    		

    

    
電壓電源：
單電源
    		

    

    
工作溫度：
0°C ~ 70°C
    		

    

    
安裝類型：
通孔
    		

    

    
封裝/外殼：
16-DIP（0.300"，7.62mm）
    		

    

    
供應(yīng)商設(shè)備封裝：
16-PDIP
    		

    

    
包裝：
管件
    		

    

    
輸入數(shù)目和類型：
4 個(gè)單端，單極；4 個(gè)單端，雙極；2 個(gè)差分，單極；2 個(gè)差分，雙極
    		

    

    

    

	
    
    
    

    
    
	
    MAX1246/MAX1247
    +2.7V, Low-Power, 4-Channel,
    Serial 12-Bit ADCs in QSOP-16
    12
    ______________________________________________________________________________________
    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 trans-
    fers to clock out the 12-bit conversion result). See Figure
    19 for MAX1246/MAX1247 QSPI connections.
    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 5 shows the timing for this sequence. Bytes RB2
    and RB3 contain the result of the conversion, padded
    with one leading zero and three trailing zeros. The total
    conversion time is a function of the serial-clock fre-
    quency 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 120s.
    Digital Output
    In unipolar input mode, the output is straight binary
    (Figure 16). For bipolar inputs, the output is two’s com-
    plement (Figure 17). Data is clocked out at the falling
    edge of SCLK in MSB-first format.
    Clock Modes
    The MAX1246/MAX1247 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
    MAX1246/MAX1247. The T/H acquires the input signal
    as the last three bits of the control byte are clocked into
    DIN. Bits PD1 and PD0 of the control byte program the
    clock mode. Figures 6–9 show the timing characteristics
    common to both modes.
    External Clock
    In external clock mode, the external clock not only shifts
    data in and out, but it also drives the analog-to-digital
    conversion steps. SSTRB pulses high for one clock
    period after the last bit of the control byte. Succes-
    sive-approximation bit decisions are made and appear
    at DOUT on each of the next 12 SCLK falling edges
    (Figure 5). SSTRB and DOUT go into a high-impedance
    state when CS goes high; after the next CS falling edge,
    SSTRB outputs a logic low. Figure 7 shows the SSTRB
    timing in external clock mode.
    The conversion must complete in some minimum time,
    or droop on the sample-and-hold capacitors may
    degrade conversion results. Use internal clock mode if
    the serial clock frequency is less than 100kHz, or if
    serial clock interruptions could cause the conversion
    interval to exceed 120s.
    SEL2
    SEL1
    SEL0
    CH0
    CH1
    CH2
    CH3
    COM
    00
    1
    +
    –
    10
    1
    +
    –
    01
    0
    +
    –
    11
    0
    +
    –
    Table 2. Channel Selection in Single-Ended Mode (SGL/D
    DIIF
    F = 1)
    SEL2
    SEL1
    SEL0
    CH0
    CH1
    CH2
    CH3
    00
    1
    +
    –
    01
    0
    +
    –
    10
    1
    –
    +
    11
    0
    –
    +
    Table 3. Channel Selection in Differential Mode (SGL/D
    DIIF
    F = 0)
    
    
    
    
    
    


    


    

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    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
MAX1246BCPE+
功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 4Ch 133ksps 3.6V 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

    

    
MAX1246BEEE
功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 4Ch 133ksps 3.6V 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

    

    
MAX1246BEEE+
功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 4Ch 133ksps 3.6V 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

    

    
MAX1246BEEE+T
功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 4Ch 133ksps 3.6V 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

    

    
MAX1246BEEE-T
功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 4Ch 133ksps 3.6V 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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