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| 型号： | AD7705BRZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 36/44页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 2CHAN 16SOIC |
| 标准包装： | 1 |
| 位数： | 16 |
| 采样率（每秒）： | 500 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 1mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 标准包装 |
| 输入数目和类型： | 2 个差分，单极；2 个差分，双极 |
| 其它名称： | AD7705BRZ-REEL7DKR |
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AD7705/AD7706
Rev. C | Page 41 of 44
BATTERY MONITORING
An application where the low power, single-supply operation is
required is battery monitoring in portable equipment applications.
Figure 29 shows a block diagram of a battery monitor using the
AD7705 and an external multiplexer to measure differentially
the voltage across a single cell.
The second channel on the AD7705 is used to monitor current
drain from the battery. The AD7705, with its dual-input
channel, is ideally suited for measurement systems requiring
two input channels, as in this case, to monitor voltage and
current.
Because the AD7705 can accommodate very low input signals,
RSENSE can be kept low, reducing undesired power dissipation.
Operating with a gain of 128, a ±9.57 mV full-scale signal can
be measured with a resolution of 2 μV, giving 13.5 bits of flicker-
free performance in such a system.
To obtain specified performance in unbuffered mode, the
common-mode range of the input is GND to VDD, provided that
the absolute value of the analog input voltage lies between
GND 100 mV and VDD + 30 mV. Absolute voltages of
GND 200 mV can be accommodated on the AD7705 at 25°C
without any degradation in performance, but with significantly
increased leakage at elevated temperatures.
VCELL 1
RSENSE
AIN1(+)
AIN1(–)
AIN2(+)
AIN2(–)
REF IN(–)
AD7705
VDD
REF IN(+)
1.225V
REF
VOLTAGE
REGULATORS
VCELL 2
VCELL 3
VCELL 4
VDIFF1
VDIFF2
VDIFF3
VDIFF4
DC BATTERY
CHARGING
SOURCE
LOAD
ON/OFF SWITCH
5V
3V
GND
4-TO-1
DIFFERENTIAL
MULTIPLEXER
01166-029
Figure 29. Battery Monitoring Using the AD7705
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7705BRZ-REEL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs |
| AD7705EB | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V/5 V 1 mW 2-/3-Channel 16-Bit Sigma-Delta ADCs(264.12 k) |
| AD7706 | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs |
| AD7706BN | 功能描述:IC ADC 16BIT 3CH 16-DIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
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