參數(shù)資料
型號(hào)： MAX1346BETX+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 10/39頁(yè)
文件大?。?/td> 0K
描述： IC ADC/DAC 12BIT W/FIFO 36WQFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
類型： ADC，DAC
分辨率（位）： 12 b
采樣率（每秒）： 225k
數(shù)據(jù)接口： MICROWIRE?，QSPI?，串行，SPI?
電壓電源： 模擬和數(shù)字
電源電壓： 4.75 V ~ 5.25 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 36-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 36-TQFN 裸露焊盤(pán)（6x6）
包裝： 帶卷 (TR)
MAX1340/MAX1342/MAX1346/MAX1348
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
18
______________________________________________________________________________________
12-Bit DAC
In addition to the 12-bit ADC, the MAX1340/MAX1342/
MAX1346/MAX1348 also include four voltage-output,
12-bit, monotonic DACs with less than 4 LSB integral
nonlinearity error and less than 1 LSB differential nonlin-
earity error. Each DAC has a 2s settling time and ultra-
low glitch energy (4nVs). The 12-bit DAC code is
unipolar binary with 1 LSB = VREF / 4096.
DAC Digital Interface
Figure 1 shows the functional diagram of the MAX1342.
The shift register converts a serial 16-bit word to parallel
data for each input register operating with a clock rate
up to 25MHz. The SPI-compatible digital interface to the
shift register consists of
CS, SCLK, DIN, and DOUT.
Serial data at DIN is loaded on the falling edge of SCLK.
Pull
CS low to begin a write sequence. Begin a write to
the DAC by writing 0001XXXX as a command byte. The
last 4 bits of the DAC select register are don’t-care bits.
See Table 10. Write another 2 bytes to the DAC inter-
face register following the command byte to select the
appropriate DAC and the data to be written to it. See
Tables 17 and 18.
The four double-buffered DACs include an input and a
DAC register. The input registers are directly connect-
ed to the shift register and hold the result of the most
recent write operation. The four 12-bit DAC registers
hold the current output code for the respective DAC.
Data can be transferred from the input registers to the
DAC registers by pulling
LDAC low or by writing the
appropriate DAC command sequence at DIN. See
Table 17. The outputs of the DACs are buffered through
four rail-to-rail op amps.
The MAX1340/MAX1342/MAX1346/MAX1348 DAC out-
put-voltage range is based on the internal reference or
an external reference. Write to the setup register (see
Table 5) to program the reference. If using an external
voltage reference, bypass REF1 with a 0.1F capacitor
to AGND. The internal reference is 4.096V. When using
an external reference, the voltage range is 0.7V to AVDD.
DAC Transfer Function
See Table 2 for various analog outputs from the DAC.
DAC Power-On Wake-Up Modes
The state of the RES_SEL input determines the wake-up
state of the DAC outputs. Connect RES_SEL to AVDD or
AGND upon power-up to be sure the DAC outputs
wake up to a known state. Connect RES_SEL to AGND
to wake up all DAC outputs at 000h. While RES_SEL is
low, the 100k internal resistor pulls the DAC outputs to
AGND and the output buffers are powered down.
Connect RES_SEL to AVDD to wake up all DAC outputs
at FFFh. While RES_SEL is high, the 100k pullup
resistor pulls the DAC outputs to VREF1 and the output
buffers are powered down.
DAC Power-Up Modes
See Table 18 for a description of the DAC power-up
and power-down modes.
GPIOs
In addition to the internal ADC and DAC, the
MAX1342/MAX1348 also provide four GPIO channels,
GPIOA0, GPIOA1, GPIOC0, GPIOC1. Read and write to
the GPIOs as detailed in Table 1 and Tables 12–16. Also,
see the
GPIO Command section. See Figures 11 and 12
for GPIO timing.
Write to the GPIOs by writing a command byte to the
GPIO command register. Write a single data byte to the
MAX1342/MAX1348 following the command byte.
DAC CONTENTS
MSB
LSB
ANALOG OUTPUT
1111
1000
0000
0001
1000
0000
0111
0000
0001
0000
0
+
VREF
4095
4096
+
=
+
V
REF
2048
4096
2
+
VREF
2047
4096
+
VREF
1
4096
+
VREF
2049
4096
Table 2. DAC Output Code Table
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參數(shù)描述
MAX1347BETX 制造商:Maxim Integrated Products 功能描述:12-BIT, MULTICHANNEL ADCS/DACS WITH FIFO, TEM - Rail/Tube
MAX1347BETX+ 制造商:Maxim Integrated Products 功能描述:12-BIT MULTICHANNEL ADCS/DACS WITH - Rail/Tube
MAX1347BETX+T 制造商:Maxim Integrated Products 功能描述:12-BIT MULTICHANNEL ADCS/DACS WITH - Tape and Reel
MAX1347BETX-T 制造商:Maxim Integrated Products 功能描述:12-BIT, MULTICHANNEL ADCS/DACS WITH FIFO, TEM - Tape and Reel
MAX13481EETE 功能描述:USB 接口集成電路 RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
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