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參數(shù)資料
| 型號： | MAX1046BETX+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 10/39頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC/DAC 10BIT 36-TQFN-EP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | ADC，DAC |
| 分辨率（位）： | 10 b |
| 采樣率（每秒）： | 225k |
| 數(shù)據(jù)接口： | 串行 |
| 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 |
| 供應(yīng)商設(shè)備封裝： | 36-TQFN 裸露焊盤（6x6） |
| 包裝： | 管件 |
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MAX1040/MAX1042/MAX1046/MAX1048
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
18
______________________________________________________________________________________
Celsius (two’s complement), at a resolution of 8 LSB
per degree. See the
Temperature Measurements sec-
tion for details on converting the digital code to a tem-
perature.
10-Bit DAC
In addition to the 10-bit ADC, the MAX1040/MAX1042/
MAX1046/MAX1048 also include four voltage-output,
10-bit, monotonic DACs with less than 1 LSB integral
nonlinearity error and less than 0.5 LSB differential non-
linearity error. Each DAC has a 2s settling time and
ultra-low glitch energy (4nVs). The 10-bit DAC code is
unipolar binary with 1 LSB = VREF / 1024.
DAC Digital Interface
Figure 1 shows the functional diagram of the MAX1042.
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 10-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 MAX1040/MAX1042/MAX1046/MAX1048 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 100kΩ 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 100kΩ 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
MAX1042/MAX1048 also provide four GPIO channels,
GPIOA0, GPIOA1, GPIOC0, and 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.
DAC CONTENTS
MSB
LSB
ANALOG OUTPUT
11
1111
10
0000
0001
10
0000
01
0111
00
0000
0001
00
0000
0
+
VREF
1023
1024
+
=
+
V
REF
512
1024
2
+
VREF
511
1024
+
VREF
1
1024
+
VREF
1023
1024
Table 2. DAC Output Code Table
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1046BETX+ | 功能描述:ADC / DAC多通道 10Bit AD/DACs w/FIFO Temp Sns & GPIO Port RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX1046BETX+T | 功能描述:ADC / DAC多通道 10Bit AD/DACs w/FIFO Temp Sns & GPIO Port RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX1046BETX-T | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX1048 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports |
| MAX1048BETX | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
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