- 您现在的位置：买卖IC网 > PDF目录20635 > 71M6531D-IM/F (Maxim Integrated)IC ENERGY METER 128KB 68-QFN PDF资料下载
参数资料
| 型号： | 71M6531D-IM/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/121页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER 128KB 68-QFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 260 |
| 系列： | * |
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页第10页第11页第12页当前第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页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页
FDS 6531/6532 005
Data Sheet 71M6531D/F-71M6532D/F
V inp
V inn
A
B
A
B
+
-
G
A
B
A
B
V outp
V outn
CROSS
Figure 3: General Topology of a Chopped Amplifier
It is assumed that an offset voltage Voff appears at the positive amplifier input. With all switches, as
controlled by CROSS, in the A position, the output voltage is:
Voutp – Voutn = G (Vinp + Voff – Vinn) = G (Vinp – Vinn) + G Voff
With all switches set to the B position by applying the inverted CROSS signal, the output voltage is:
Voutn – Voutp = G (Vinn – Vinp + Voff) = G (Vinn – Vinp) + G Voff, or
Voutp – Voutn = G (Vinp – Vinn) - G Voff
Thus, when CROSS is toggled, e.g. after each multiplexer cycle, the offset will alternately appear on the
output as positive and negative, which results in the offset effectively being eliminated, regardless of its
polarity or magnitude.
When CROSS is high, the connection of the amplifier input devices is reversed. This preserves the overall
polarity of that amplifier gain; it inverts its input offset. By alternately reversing the connection, the
amplifier’s offset is averaged to zero. This removes the most significant long-term drift mechanism in the
voltage reference. The CHOP_E[1:0] field controls the behavior of CROSS. The CROSS signal will reverse
the amplifier connection in the voltage reference in order to negate the effects of its offset. On the first
CK32 rising edge after the last multiplexer state of its sequence, the multiplexer will wait one additional
CK32 cycle before beginning a new frame. At the beginning of this cycle, the value of CROSS will be
updated according to the CHOP_E[1:0] field. The extra CK32 cycle allows time for the chopped VREF to
settle. During this cycle, MUXSYNC is held high. The leading edge of MUXSYNC initiates a pass
through the CE program sequence. The beginning of the sequence is the serial readout of the four RTM
words.
CHOP_E[1:0] has four states: positive, reverse and two toggle states. In the positive state, CHOP_E[1:0]
= 01, CROSS and CHOP_CLK are held low. In the reverse state, CHOP_E[1:0] = 10, CROSS and
CHOP_CLK are held high. In the first toggle state, CHOP_E[1:0] = 00, CROSS is automatically toggled
near the end of each multiplexer frame and an ALT frame is forced during the last multiplexer frame in each
SUM cycle. It is desirable that CROSS take on alternate values during each ALT frame. For this reason,
if CHOP_E[1:0] = 00, CROSS will not toggle at the end of the multiplexer frame immediately preceding
the ALT frame in each accumulation interval.
Figure 4: CROSS Signal with CHOP_E[1:0] = 00
interval, CROSS is low, at the end of the second interval, CROSS is high. The offset error for the two
temperature measurements taken during the ALT multiplexer frames will be averaged to zero. Note that
Rev 2
13
相关PDF资料 |
PDF描述 |
|---|---|
| LQW15AN8N2J00D | INDUCTOR 8.2NH 540MA 0402 |
| RSM40DTBN-S189 | CONN EDGECARD 80POS R/A .156 SLD |
| HBM12DRYS | CONN EDGECARD 24POS DIP .156 SLD |
| EBM10DREI | CONN EDGECARD 20POS .156 EYELET |
| GMM10DSUH | CONN EDGECARD 20POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6531D-IMR/F | 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6531D-IMR/F1 | 功能描述:计量片上系统 - SoC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6531D-IMR/F2 | 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6531F | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Energy Meter IC |
| 71M6531F-DB | 功能描述:开发板和工具包 - 8051 71M6531F Demo Brd RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压: |
发布紧急采购，3分钟左右您将得到回复。