收藏本站
ADT7476
Table 8. VOLTAG E LIMIT REGISTERS
Register Description
Default
and 12 V inputs. This allows the user to directly connect
external sensors or rescale the analog voltage measurement
inputs for other applications. The input range of the ADC
0x44
0x45
0x46
0x47
0x48
0x49
0x4A
0x4B
2.5 V Low Limit
2.5 V High Limit
V CCP Low Limit
V CCP High Limit
V CC Low Limit
V CC High Limit
5.0 V Low Limit
5.0 V High Limit
0x00
0xFF
0x00
0xFF
0x00
0xFF
0x00
0xFF
without the attenuators is 0 V to 2.25 V.
Bypass Individual Voltage Input Attenuators
Bits [7:4] of Configuration Register 4 (0x7D) can be used
to bypass individual voltage channel attenuators.
Table 10. BYPASSING INDIVIDUAL VOLTAGE INPUT
ATTENUATORS
Configuration Register 4 (0x7D)
0x4C
0x4D
12 V Low Limit
12 V High Limit
0x00
0xFF
Bit No.
[4]
Channel Attenuated
Bypass 2.5 V Attenuator
Table 13 shows the input ranges of the analog inputs and
output codes of the 10-bit ADC.
When the ADC is running, it samples and converts a
[5]
[6]
[7]
Bypass V CCP Attenuator
Bypass 5.0 V Attenuator
Bypass 12 V Attenuator
voltage input in 0.7 ms and averages 16 conversions to
reduce noise; a measurement takes nominally 11 ms.
Table 11. CONFIGURATION REGISTER 2 (REG. 0X73)
Bit Description
Extended Resolution Registers
Voltage measurements can be made with higher accuracy
using the extended resolution registers (0x76 and 0x77).
Whenever the extended resolution registers are read, the
[4]
[5]
[6]
1: Averaging Off
1: Bypass Input Attenuators
1: Single-channel Convert Mode
corresponding data in the voltage measurement registers
(0x20 to 0x24) is locked until their data is read. That is, if
extended resolution is required, then the extended resolution
register must be read first, immediately followed by the
appropriate voltage measurement register.
Additional ADC Functions for Voltage Measurements
A number of other functions are available on the
ADT7476 to offer the system designer increased flexibility.
Turn-off Averaging
For each voltage/temperature measurement read from a
value register, 16 readings have been made internally and
the results averaged before being placed into the value
register. When faster conversions are needed, setting Bit 4
of Configuration Register 2 (0x73) turns averaging off. This
effectively gives a reading 16 times faster but the reading
can be noisier. The default round robin cycle time takes
146.5 ms.
TACH1 Minimum High Byte (0x55)
[7:5] Selects ADC channel for single-channel convert mode.
Single-channel ADC Conversion
While single-channel mode is intended as a test mode that
can be used to increase sampling times for a specific
channel, and therefore helps to analyze that channel’s
performance in greater detail, it can also have other
applications.
Setting Bit 6 of Configuration Register 2 (0x73) places
the ADT7476 into single-channel ADC conversion mode. In
this mode, the ADT7476 can only read a single voltage
channel. The selected voltage input is read every 0.7 ms. The
appropriate ADC channel is selected by writing to Bits [7:5]
of the TACH1 minimum high byte register (0x55).
Table 12. PROGRAMMING SINGLE-CHANNEL ADC
MODE
Table 9. CONVERSION TIME WITH AVERAGING
DISABLED
Bits [7:4], Register 0x55
000
Channel Selected (Note 1)
2.5 V
Channel
Voltage Channels
Remote Temperature 1
Remote Temperature 2
Local Temperature
Measurement Time (ms)
0.7
7
7
1.3
001
010
011
100
101
V CCP
V CC
5.0 V
12 V
Remote 1 temperature
When Bit 7 of Configuration Register 6 (0x10) is set, the
default round robin cycle time increases to 240 ms.
Bypass All Voltage Input Attenuators
Setting Bit 5 of Configuration Register 2 (0x73) removes
the attenuation circuitry from the 2.5 V, V CCP , V CC , 5.0 V,
110 Local temperature
111 Remote 2 temperature
1. In the process of configuring single-channel ADC conversion
mode, the TACH1 minimum high byte is also changed, possibly
trading off TACH1 minimum high byte functionality with
single-channel mode functionality.
http://onsemi.com
13
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ADT7490ZEVB BOARD EVALUATION FOR ADT7490
ADZS-21262-1-EZEXT BOARD DAUGHTER FOR ADSP-21262
ADZS-BF-EZEXT-1 BOARD DAUGHTER ADSP-BF533/561KIT
ADZS-BFAV-EZEXT BOARD DAUGHT ADSP-BF533,37,61KIT
ADZS-BFSHUSB-EZEXT BOARD DAUGHTER EZ EXTENDER
ADZS-BRKOUT-EX3 ADZS-BRKOUT-EX3
ADZS-SHAUDIO-EZEXT SHARC AUDIO EZ-EXTENDER
ADZS-WVGALCD-EX3 BOARD EXTENDER WVGA/LCD EI3
相关代理商/技术参数
ADT7481 制造商:AD 制造商全称:Analog Devices 功能描述:Dual Channel Temperature Sensor and Over Temperature Alarm
ADT7481ARMZ 功能描述:板上安装温度传感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
ADT7481ARMZ-001 功能描述:板上安装温度传感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
ADT7481ARMZ-1 功能描述:IC SENSOR TEMP 2CH ALARM 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADT7481ARMZ-1R7 功能描述:板上安装温度传感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
ADT7481ARMZ-1REEL 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:
ADT7481ARMZ-1REEL7 制造商:AD 制造商全称:Analog Devices 功能描述:Dual Channel Temperature Sensor and Over Temperature Alarm
ADT7481ARMZ-1RL 功能描述:板上安装温度传感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor