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参数资料
| 型号： | MAX1042BETX+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/39页 |
| 文件大小： | 0K |
| 描述： | IC ADC/DAC 10BIT W/FIFO 36TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | ADC，DAC |
| 分辨率（位）： | 10 b |
| 采样率（每秒）： | 225k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 电压电源： | 模拟和数字 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 包装： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1042BETX+ | 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 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX1042BETX+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 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX1042BETX-T | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX1043 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports |
| MAX1043BETX | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
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