- 您现在的位置：买卖IC网 > PDF目录9466 > MAX1342BETX+T (Maxim Integrated Products)IC ADC/DAC 12BIT W/FIFO 36WQFN PDF资料下载
参数资料
| 型号： | MAX1342BETX+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 26/39页 |
| 文件大小： | 0K |
| 描述： | IC ADC/DAC 12BIT W/FIFO 36WQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | ADC，DAC |
| 分辨率（位）： | 12 b |
| 采样率（每秒）： | 225k |
| 数据接口： | 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： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页当前第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页
MAX1340/MAX1342/MAX1346/MAX1348
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
32
______________________________________________________________________________________
Externally Clocked Acquisitions and
Conversions Using the Serial Interface
ADC Conversions in Clock Mode 11
In clock mode 11, acquisitions and conversions are ini-
tiated by writing a command byte to the conversion
register and are performed one at a time using the
SCLK as the conversion clock. Scanning, averaging
and the FIFO are disabled, and the conversion result is
available at DOUT during the conversion. Output data
is updated on the rising edge of SCLK in clock mode
11. See Figure 9 for clock mode 11 timing.
Initiate a conversion by writing a command byte to the
conversion register followed by 16 SCLK cycles. If
CS
is pulsed high between the eighth and ninth cycles, the
pulse width must be less than 100s. To continuously
convert at 16 cycles per conversion, alternate 1 byte of
zeros (NOP byte) between each conversion byte. If 2
NOP bytes follow a conversion byte, the analog cells
power down at the end of the second NOP. Set the
FBGON bit to one in the reset register to keep the inter-
nal bias block powered.
If reference mode 00 is requested, or if an external refer-
ence is selected but a temperature measurement is being
requested, wait 45s with
CS high after writing the con-
version byte to extend the acquisition and allow the inter-
nal reference to power up. To perform a temperature
measurement, write 24 bytes (192 cycles) of zeros after
the conversion byte. The temperature result appears on
DOUT during the last 2 bytes of the 192 cycles.
Conversion-Time Calculations
The conversion time for each scan is based on a num-
ber of different factors: conversion time per sample,
samples per result, results per scan, if a temperature
measurement is requested, and if the external refer-
ence is in use. Use the following formula to calculate
the total conversion time for an internally timed conver-
sion in clock mode 00 and 10 (see the
Electrical
Characteristics, as applicable):
Total conversion time =
tCNV x nAVG x nSCAN + tTS + tINT-REF,SU
where:
tCNV = tDOV (where tDOV is dependent from the clock
and reference mode selected)
nAVG = samples per result (amount of averaging)
nSCAN = number of times each channel is scanned; set
to one unless [SCAN1, SCAN0] = 10
tTS = time required for temperature measurement
(58.1s); set to zero if temperature measurement is not
requested
tINT-REF,SU = tWU (external-reference wake-up); if a
conversion using the external reference is requested
In clock mode 01, the total conversion time depends on
how long
CNVST is held low or high. Conversion time in
externally clocked mode (CKSEL1, CKSEL0 = 11)
depends on the SCLK period and how long
CS is held
high between each set of eight SCLK cycles. In clock
mode 01, the total conversion time does not include the
time required to turn on the internal reference.
SCLK
DOUT
MSB1
LSB1
MSB2
(ACQUISITION1)
(ACQUISITION2)
(CONVERSION1)
DIN
(CONVERSION BYTE)
CS
EOC
X = DON'T CARE.
Figure 9. Clock Mode 11—Externally Timed Acquisition, Sampling, and Conversion without
CNVST
相关PDF资料 |
PDF描述 |
|---|---|
| VI-21Y-MW-S | CONVERTER MOD DC/DC 3.3V 66W |
| MAX127BCAI+T | IC DAS 12BIT 2-WIRE 28-SSOP |
| VI-27L-MY-S | CONVERTER MOD DC/DC 28V 50W |
| V375B28M300B3 | CONVERTER MOD DC/DC 28V 300W |
| VI-210-MY-S | CONVERTER MOD DC/DC 5V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX13430EETB+ | 制造商:Maxim Integrated Products 功能描述:RS-485 TRANSCEIVERS WITH LOW-VOLTAGE LOGIC INTERFACE - Rail/Tube |
| MAX13430EETB+T | 功能描述:RS-485接口IC Txrx RS-485 0.5Mbps Half RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX13430EEUB+ | 功能描述:RS-485接口IC Txrx RS-485 0.5Mbps Half RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX13430EEUB+T | 功能描述:RS-485接口IC Txrx RS-485 0.5Mbps Half RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX13431EETB+ | 制造商:Maxim Integrated Products 功能描述:LINE TRNSCVR 1TR 1TX 1RX 10TDFN EP - Rail/Tube 制造商:Maxim Integrated Products 功能描述:RS-485 TRANSCEIVERS WITH LOW-VOLTAGE LOG |
发布紧急采购，3分钟左右您将得到回复。