- 您现在的位置：买卖IC网 > PDF目录17050 > MAX544XEVKIT# (Maxim Integrated Products)BOARD EVAL DAC MAX5441 MAX5442 PDF资料下载
参数资料
| 型号： | MAX544XEVKIT# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL DAC MAX5441 MAX5442 |
| 标准包装： | 1 |
| DAC 的数量： | 2 |
| 位数： | 16 |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 设置时间： | 1µs |
| DAC 型： | 电压 |
| 工作温度： | -40°C ~ 85°C |
| 已供物品： | 板，线缆，软件 |
| 已用 IC / 零件： | MAX5441，MAX5442 |
MAX5441–MAX5444
+3V/+5V, Serial-Input,
Voltage-Output, 16-Bit DACs
8
_______________________________________________________________________________________
to a standard R-2R ladder, allowing unbuffered opera-
tion in medium-load applications.
The MAX5442/MAX5444 provide matched bipolar offset
resistors, which connect to an external op amp for bipo-
lar output swings (Figure 2b).
Digital Interface
The MAX5441–MAX5444 digital interface is a standard
3-wire connection compatible with SPI/QSPI/
MICROWIRE interfaces. The chip-select input (CS)
frames the serial data loading at the data-input pin
(DIN). Immediately following CS’s high-to-low transition,
the data is shifted synchronously and latched into the
input register on the rising edge of the serial clock input
(SCLK). After 16 data bits have been loaded into the
serial input register, it transfers its contents to the DAC
latch on CS’s low-to-high transition (Figure 3). Note that
if CS is not kept low during the entire 16 SCLK cycles,
data will be corrupted. In this case, reload the DAC
latch with a new 16-bit word.
Clearing the DAC
A 20ns (min) logic-low pulse on CLR asynchronously
clears the DAC buffer to code 0 in the MAX5441/
MAX5443 and to code 32768 in the MAX5442/ MAX5444.
External Reference
The MAX5441–MAX5444 operate with external voltage
references from 2V to VDD. The reference voltage
determines the DAC’s full-scale output voltage.
Power-On Reset
The power-on reset circuit sets the output of the
MAX5441/MAX5443 to code 0 and the output of the
MAX5442/MAX5444 to code 32768 when VDD is first
applied. This ensures that unwanted DAC output volt-
ages will not occur immediately following a system
power-up, such as after a loss of power.
Applications Information
Reference and Ground Inputs
The MAX5441–MAX5444 operate with external voltage
references from 2V to VDD, and maintain 16-bit perfor-
mance if certain guidelines are followed when selecting
and applying the reference. Ideally, the reference’s
temperature coefficient should be less than
0.1ppm/°C to maintain 16-bit accuracy to within 1LSB
over the -40°C to +85°C extended temperature range.
Since this converter is designed as an inverted R-2R volt-
age-mode DAC, the input resistance seen by the voltage
reference is code-dependent. In unipolar mode, the
worst-case input-resistance variation is from 11.5k
(at
code 8555hex) to 200k
(at code 0000hex). The maxi-
mum change in load current for a 2.5V reference is 2.5V /
11.5k
= 217A; therefore, the required load regulation
is 7ppm/mA for a maximum error of 0.1LSB. This implies
a reference output impedance of less than 18m
. In
addition, the impedance of the signal path from the volt-
age reference to the reference input must be kept low
because it contributes directly to the load-regulation
error.
The requirement for a low-impedance voltage reference
is met with capacitor bypassing at the reference inputs
and ground. A 0.1F ceramic capacitor with short leads
between REF and GND provides high-frequency
bypassing. A surface-mount ceramic chip capacitor is
preferred because it has the lowest inductance. An
;
;;
CS
SCLK
DIN
MSB
LSB
D15
D8
D7 D6 D5 D4 D3 D2
D1 D0
SUB-BITS
DAC
UPDATED
D14 D13 D12 D11 D10 D9
Figure 3. MAX5441–MAX5444 3-Wire Interface Timing Diagram
相关PDF资料 |
PDF描述 |
|---|---|
| 0210490325 | CABLE JUMPER 1.25MM .076M 26POS |
| REC5-0515DRW/H2/C | CONV DC/DC 5W 4.5-9VIN +/-15VOUT |
| 0210391103 | CABLE JUMPER 1MM .102M 39POS |
| EVAL-AD7994EBZ | BOARD EVAL FOR AD7994 |
| REC5-0515DRW/H2/A | CONV DC/DC 5W 4.5-9VIN +/-15VOUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX544XEVKIT# | 功能描述:数据转换 IC 开发工具 MAX5441/42/43/44 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| MAX5450EUB | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5450EUB+ | 功能描述:数字电位计 IC Dual 256-Tap Up/Down Interface RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5450EUB+T | 功能描述:数字电位计 IC Dual 256-Tap Up/Down Interface RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5450EUB-T | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。