- 您现在的位置：买卖IC网 > PDF目录2097 > MCP3221A5T-E/OT (Microchip Technology)IC ADC 12BIT 2.7V 1CH LP SOT23-5 PDF资料下载
参数资料
| 型号： | MCP3221A5T-E/OT |
| 厂商： | Microchip Technology |
| 文件页数： | 10/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 2.7V 1CH LP SOT23-5 |
| 标准包装： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 22.3k |
| 数据接口： | 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： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 标准包装 |
| 输入数目和类型： | 1 个单端，单极 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
| 配用： | VSUPEV2-ND - BOARD EVAL FOR MCP4022,4023,4024 MXSIGDM-ND - BOARD DEMO PICTAIL MIXED SIGNAL |
| 其它名称： | MCP3221A5T-E/OTDKR |
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页当前第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页第26页第27页第28页
MCP3221
DS21732C-page 18
2006 Microchip Technology Inc.
6.0
APPLICATIONS INFORMATION
6.1
Driving the Analog Input
The MCP3221 has a single-ended analog input (AIN).
For proper conversion results, the voltage at the AIN
pin must be kept between VSS and VDD. If the converter
has no offset error, gain error, INL or DNL errors, and
the voltage level of AIN is equal to or less than
VSS + 1/2 LSB, the resultant code will be 000h. Addi-
tionally, if the voltage at AIN is equal to or greater than
VDD - 1.5 LSB, the output code will be FFFh.
The analog input model is shown in Figure 6-1. In this
diagram, the source impedance (RSS) adds to the inter-
nal sampling switch (RS) impedance, directly affecting
the time required to charge the capacitor (CSAMPLE).
Consequently, a larger source impedance increases
the offset error, gain error and integral linearity errors of
the conversion. Ideally, the impedance of the signal
source should be near zero. This is achievable with an
operational amplifier, such as the MCP6022, which has
a closed-loop output impedance of tens of ohms.
FIGURE 6-1:
Analog Input Model, AIN.
6.2
Connecting to the I2C Bus
The I2C bus is an open-collector bus, requiring pull-up
resistors connected to the SDA and SCL lines. This
configuration is shown in Figure 6-2.
FIGURE 6-2:
Pull-up Resistors on I2C
Bus.
The number of devices connected to the bus is limited
only by the maximum bus capacitance of 400 pF. A
possible configuration using multiple devices is shown
in Figure 6-3.
FIGURE 6-3:
Multiple Devices on I2C
Bus.
CPIN
VA
RSS
AIN
7pF
VT = 0.6V
ILEAKAGE
Sampling
Switch
SS
RS = 1 kΩ
CSAMPLE
= DAC capacitance
VSS
VDD
= 20 pF
±1 nA
Legend
VA
=
signal source
RSS = source impedance
AIN = analog input pad
CPIN = analog input pin capacitance
VT = threshold voltage
ILEAKAGE = leakage current at the pin
due to various junctions
SS
=
sampling switch
R
S
=
sampling switch resistor
CSAMPLE = sample/hold capacitance
PICmicro
SDA
SCL
VDD
RPU
RPU is typically: 10 kΩ for fSCL = 100 kHz
2k
Ω for fSCL = 400 kHz
MCP3221
Analog
Input
Signal
Microcon
trol
ler
AIN
SDA SCL
PIC16F876
Microcontroller
MCP3221
12-bit ADC
TC74
Temperature
Sensor
24LC01
EEPROM
相关PDF资料 |
PDF描述 |
|---|---|
| MCP3302-BI/SL | IC ADC 13BIT 2.7V 2CH SPI 14SOIC |
| MCP3421A0T-E/CH | IC ADC 18BIT 3.75SPS 1CH SOT23-6 |
| MCP3421A0T-E/OT | IC ADC 18BIT 3.75SPS 1CH SOT23-6 |
| MCP3424T-E/ST | IC ADC 18BIT 3.75SPS 4CH 14TSSOP |
| MCP3425A0T-E/CH | IC ADC 16BIT I2C PROGBL SOT23-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP3221A5T-I/OT | 功能描述:模数转换器 - ADC 10-bit I2C Sgl Chl RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3221A5T-I/OT | 制造商:Microchip Technology Inc 功能描述:A/D Converter (A-D) IC |
| MCP3221A5T-I/OT-CUT TAPE | 制造商:Microchip 功能描述:Single Channel I2C Interface 2.7 V 12-Bit A/D Converter SMT - SOT-23-5 |
| MCP3221A6-E/OT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low Power 12-Bit A/D Converter With I2C⑩ Interface |
| MCP3221A6-I/OT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low Power 12-Bit A/D Converter With I2C⑩ Interface |
发布紧急采购，3分钟左右您将得到回复。