参数资料
| 型号： | TSSOP20EV |
| 厂商： | Microchip Technology |
| 文件页数： | 10/30页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR MCP43X |
| 标准包装： | 1 |
| 主要目的： | 裸评估板 |
| 嵌入式： | 否 |
| 主要属性： | TSSOP-20/16/14/8 和 SSOP-20 评估板 |
| 次要属性： | 用于 PICmicro? MCU、ADC、DAC 和其它设备 |
| 已供物品： | 5 裸板，文档 |
| 产品目录页面： | 659 (CN2011-ZH PDF) |
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Delta-Sigma ADCs
Voltage and Current Measurment Using
MCP3422 Analog-to-Digital Converter (ADC) Feature Summary
Delta-Sigma ADCs
The MCP342X family devices are easy-to-use high precision
delta sigma ADC devices from Microchip. These devices have
an internal reference (2.048V) with a user programmable
PGA (x1, x2, x4, x8). The ADC resolution is programmable as
12-bit, 14-bit, 16-bit or 18-bit by the user.
This ADC family offers single, dual and four differential
input channels. Because of its simplicity and low price, this
device family can be used for various applications from
simple voltage and current measurement to high precision
temperature measurement.
Voltage Measurement Using MCP3421 Device
R 1
Bit Resolution
Number of Differential Input
Channels
Internal Programmable Gain
Amplifier
INL Error (Typical)
Offset Error (Typical)
Internal Reference Voltage
Output Noise (Typical)
Gain Error (Typical)
Interface
18 bits (User can select 18-, 16-,
14- or 12-bit options)
2
x1, x2, x4 or x8 (user option)
10 PPM of full scale range
15 μV
2.048V
1.5 μVrms
0.05% of full scale range
I 2 C?
+
ADC
V BAT
+
ADC
V BAT
R 2
–
MCP3421
–
MCP3421
(a) If V REF < V BAT
MCU
(b) If V REF > V BAT
MCU
V IN = ( R1 + R2 ) ● ( V BAT )
VMeasured = ADC Output Codes ● LSB ● _________ ● _____
LSB = ________________
LSB of 18-bit ADC = ________________ = ______ = 15.625 μV
R2
________
( R1 + R2 ) 1
R2 PGA
Reference Voltage
2 N –1
Reference Voltage 2.048V
2 N –1 2 17
Current Measurement Using MCP3421 Device
Wireless Temperature Monitoring Solution
Charging
Current Sensor
To Load
Discharging
2.4 GHz
Current
+
–
Current
Heat
18-bit ? ∑ ADC
Battery
ADC
MCP3421
+
MCP3421
MRF24J40
–
(Thermocouple)
MCP9804
10
MCU
Current = (Measured Voltage)/(Known Resistance Value of Current Sensor)
Direction of current is determined by sign bit (MSB bit) of the ADC output code.
Signal Chain Design Guide
Temp Sensor
±1°C
PIC ? MCU
相关PDF资料 |
PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSSOP-28 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:16-BIT CCD/CIS ANALOG SIGNAL PROCESSOR |
| TSSOP-56 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Fairchild Semiconductor Product Package Material Disclosure |
| TSSOP-8 | 制造商:AOSMD 制造商全称:Alpha & Omega Semiconductors 功能描述:Tape and Reel Dimensions |
| TSSOP-8PIN | 制造商:IRF 制造商全称:International Rectifier 功能描述:Package Dimensions |
| TSSOP-B14J | 制造商:ROHM 制造商全称:Rohm 功能描述:IC Packages |
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