- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄68811 > 71M6531D-IM/F (TERIDIAN SEMICONDUCTOR CORP) 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68 PDF資料下載
參數(shù)資料
| 型號(hào)： | 71M6531D-IM/F |
| 廠商： | TERIDIAN SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68 |
| 封裝： | LEAD FREE, QFN-68 |
| 文件頁數(shù)： | 83/120頁 |
| 文件大小： | 2477K |
| 代理商： | 71M6531D-IM/F |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁當(dāng)前第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁
FDS 6531/6532 005
Data Sheet 71M6531D/F-71M6532D/F
v1.3
2005-2010 TERIDIAN Semiconductor Corporation
65
Figure 31: Error Band for VREF over Temperature
3.4.2
Temperature Compensation for VREF
The bandgap temperature is used to digitally compensate the power outputs for the temperature dependence
of VREF, using the CE register GAIN_ADJ. Since the band gap amplifier is chopper-stabilized, the most
significant long-term drift mechanism in the voltage reference is removed.
The following formula is used to determine the GAIN_ADJ value of the CE. In this formula, TEMP_X is the
deviation from nominal or calibration temperature expressed in multiples of 0.1 °C:
23
2
14
2
_
2
_
16385
_
PPMC
X
TEMP
PPMC
X
TEMP
ADJ
GAIN
+
+
=
3.4.3
System Temperature Compensation
In a production electricity meter, the 71M6531 or 71M6532D/F is not the only component contributing to
temperature dependency. A whole range of components (e.g. current transformers, resistor dividers,
power sources, filter capacitors) will contribute temperature effects.
Since the output of the on-chip temperature sensor is accessible to the MPU, temperature compensation
mechanisms with great flexibility are possible. MPU access to GAIN_ADJ permits a system-wide temperature
correction over the entire meter rather than local to the chip.
3.4.4
Temperature Compensation for the RTC
In order to obtain accurate readings from the RTC, the following procedure is recommended:
1.
At the time of meter calibration, the crystal oscillator is calibrated using the RTCA_ADJ register in I/O
RAM to be as close to 32768 Hz as possible. The recommended procedure is to connect a high-
precision frequency counter to the TMUXOUT pin and select 0x11 for TMUX[4:0]. This will generate
a 4-second pulse at TMUXOUT that can be used to trim RTCA_ADJ to the best value.
2.
When the meter is in service, the MPU takes frequent temperature readings. If the temperature
characteristics of the crystal are known, the temperature readings can be used to modify the settings
for the I/O RAM registers PREG[16:0] and QREG[1:0] in order to keep the crystal frequency close to
32768 Hz.
3.
After periods of operation under battery power, the temperature for the time the meter was not powered
can be estimated by averaging the temperatures before and after battery operation. Based on this, the
overall correction for the RTC time can be calculated and applied to the RTC after main power returns
to the meter.
-2800
-2400
-2000
-1600
-1200
-800
-400
0
400
800
1200
1600
2000
2400
2800
-40
-20
0
20
40
60
80
Error Band (PPM) over Temperature (°C)
±40 PPM/°C
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 71M6532F-IGTR/F | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP100 |
| 71M6534-IGT/F | SPECIALTY ANALOG CIRCUIT, PQFP120 |
| 71M6534H-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP120 |
| 71M6533H-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 71M6534-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP120 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 71M6531D-IMR/F | 功能描述:計(jì)量片上系統(tǒng) - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型:Metering SoC 最大時(shí)鐘頻率:70 Hz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數(shù)量:12 片上 ADC: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6531D-IMR/F1 | 功能描述:計(jì)量片上系統(tǒng) - SoC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型:Metering SoC 最大時(shí)鐘頻率:70 Hz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數(shù)量:12 片上 ADC: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6531D-IMR/F2 | 功能描述:計(jì)量片上系統(tǒng) - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型:Metering SoC 最大時(shí)鐘頻率:70 Hz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數(shù)量:12 片上 ADC: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6531F | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Energy Meter IC |
| 71M6531F-DB | 功能描述:開發(fā)板和工具包 - 8051 71M6531F Demo Brd RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。