参数资料
型号: MCP4725A3T-E/CH
厂商: Microchip Technology
文件页数: 29/50页
文件大小: 0K
描述: IC DAC 12BIT EE W/I2C SOT23-6
标准包装: 1
设置时间: 6µs
位数: 12
数据接口: EEPROM,I²C,串行
转换器数目: 1
电压电源: 单电源
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: SOT-23-6
供应商设备封装: SOT-23-6
包装: 标准包装
输出数目和类型: 1 电压,单极;1 电压,双极
采样率(每秒): *
产品目录页面: 673 (CN2011-ZH PDF)
配用: MCP4725DM-PTPLS-ND - BOARD DAUGHTER PICTAIL MCP4725
其它名称: MCP4725A3T-E/CHDKR
2009 Microchip Technology Inc.
DS22039D-page 35
MCP4725
8.5.2
DECREASING THE OUTPUT STEP
SIZE
Calibrating the threshold of a diode, transistor or
resistor may require a very small step size in the DAC
output voltage. These applications may require about
200 V of step resolution within 0.8V of range.
One method of achieving this small step resolution is
using a voltage divider at the DAC output. An example
is shown in Example 8-1. The step size of the DAC
output is scaled down by the factor of the ratio of the
voltage divider. Note that the bypass capacitor on the
output of the voltage divider plays a critical function in
attenuating the output noise of the DAC and the
induced noise from the environment.
EXAMPLE 8-1:
Set Point Or Threshold Calibration.
To MCU
(MASTER)
R R
VDD
Comparator
R1
R2
0.1 F
VTRIP
RSENSE
MCP4725
VDD
VOUT A0
SCL
VSS
1
2
3
4
5
6
VDD SDA
10 F
0.1 F
VDD
Dn
Input Code (0 to 4095)
=
V
OUT
V
DD
Dn
4096
------------
×
=
V
TRIP
V
OUT
R
2
R
1
R
2
+
-------------------
=
Light
(Ceramic) (Tantalum)
相关PDF资料
PDF描述
MCP4726A3T-E/CH IC DAC 12BIT NV EEP I2C SOT-23-6
MCP4728T-E/UN IC DAC 12BIT W/I2C 10-MSOP
MCP4822T-E/MS IC DAC 12BIT DUAL W/SPI 8MSOP
MCP4912T-E/SL DAC 10BIT DUAL SPI 14SOIC
MCP4921-E/MC DAC 12BIT SGL W/SPI 8DFN
相关代理商/技术参数
参数描述
MCP4725DM-PTPLS 功能描述:子卡和OEM板 MCP4725 DAC PICTail Plus Daughter Board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
MCP4725EV 功能描述:数据转换 IC 开发工具 MCP4725 Eval Brd 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
MCP4725T-E/CH 功能描述:数模转换器- DAC SNGL 12B NV DAC with I2C interface RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MCP4726A0T-E/CH 功能描述:数模转换器- DAC Sngl 12B NV DAC w/Ex Vref & I2C interface RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MCP4726A0T-E/MAY 功能描述:数模转换器- DAC Sngl 12B NV DAC w/Ex Vref & I2C interface RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube