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参数资料
| 型号： | ADM1191 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Digital Power Monitor with Convert Pin and ALERTB O |
| 中文描述： | 数字电源监视器转换引脚和ALERTB ? |
| 文件页数： | 13/16页 |
| 文件大小： | 269K |
| 代理商： | ADM1191 |
ADM1191
READ VOLTAGE AND/OR CURRENT DATA BYTES
The ADM1191 can be set up to provide information in three
different ways (see the Write Command Byte section). Depending
on how the device is configured, the following data can be read
out of the device after a conversion (or conversions).
Rev. 0 | Page 13 of 16
Voltage and Current Readback
The ADM1191 digitizes both voltage and current. Three bytes
are read out of the device in the format shown in Table 12.
Table 12. Voltage and Current Readback
Byte
Contents
B7
B6
1
Voltage
MSBs
2
Current
MSBs
3
LSBs
V3
V2
B5
V9
B4 B3
V8
B2
V6
B1
V5
B0
V4
V11
V10
V7
I11
I10
I9
I8
I7
I6
I5
I4
V1
V0
I3
I2
I1
I0
Voltage Readback
The ADM1191 digitizes voltage only. Two bytes are read out of
the device in the format shown in Table 13.
Table 13. Voltage Only Readback Format
Byte Contents
B7
B6
1
Voltage MSBs
V11 V10 V9 V8 V7 V6
2
Voltage LSBs
V3
V2
B5 B4 B3 B2
B1
V5
0
B0
V4
0
V1 V0 0
0
Current Readback
The ADM1191 digitizes current only. Two bytes are read out of
the device in the format shown in Table 14.
Table 14. Current Only Readback Format
Byte Contents
B7
B6
1
Current MSBs
I11
I10
2
Current LSBs
I3
I2
B5 B4 B3 B2
I9
I8
I1
I0
B1
I5
0
B0
I4
0
I7
0
I6
0
The following series of events occurs when the master receives
three bytes (voltage and current data) from the slave device:
1.
The master device asserts a start condition on SDA.
2.
The master sends the 7-bit slave address, followed by the
read bit (high).
3.
The addressed slave device asserts an acknowledge on SDA.
4.
The master receives the first data byte.
5.
The master asserts an acknowledge on SDA.
6.
The master receives the second data byte.
7.
The master asserts an acknowledge on SDA.
8.
The master receives the third data byte.
9.
The master asserts a no acknowledge on SDA.
10. The master asserts a stop condition on SDA, and the
transaction ends.
For cases where the master is reading voltage only or current
only, only two data bytes are read. Step 7 and Step 8 are not
required.
S
SLAVE
ADDRESS
R A DATA 1
DATA 2
N P
DATA 3
A
A
1
2
3
4
5
6
7
8
9 10
0
Figure 22. Three-Byte Read from ADM1191
S
SLAVE
ADDRESS
R A
REGISTER
ADDRESS
N P
REGISTER
DATA
A
1
2
3
4
5
6
7 8
0
Figure 23. Two-Byte Read from ADM1191
Converting ADC Codes to Voltage and Current Readings
The following equations can be used to convert ADC codes
representing voltage and current from the ADM1175 12-bit
ADC into actual voltage and current values.
Voltage
= (
V
FULLSCALE
/4096) ×
Code
where:
V
FULLSCALE
= 6.65 (7:2 range) or 26.52 (14:1 range).
Code
is the ADC voltage code read from the device (Bit V0
to Bit V11).
Current
= ((
I
FULLSCALE
/4096) ×
Code
)/
Sense Resistor
where:
I
FULLSCALE
= 105.84 mV.
Code
is the ADC current code read from the device (Bit I0 to
Bit I11).
Read Status Register
A single register of status data can also be read from the
ADM1191.
1.
The master device asserts a start condition on SDA.
2.
The master sends the 7-bit slave address, followed by the
read bit (high).
3.
The addressed slave device asserts an acknowledge on SDA.
4.
The master receives the status byte.
5.
The master asserts an acknowledge on SDA.
S
SLAVE
ADDRESS
R A DATA 1 A
1
2
3
4
5
0
Figure 24. Status Read from ADM1191
Table 15 shows the ADM1191 status registers in detail. Note
that Bit 1, Bit 3, and Bit 5 are cleared by writing to Bit 4 of the
ALERT_EN register (CLEAR).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM1191_08 | 制造商:AD 制造商全称:Analog Devices 功能描述:Digital Power Monitor with Convert Pin and ALERTB Output |
| ADM1191-2ARMZ-R7 | 功能描述:IC PWR MONITOR DGTL ALERT 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:热电冷却器 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.173"，4.40mm 宽）裸露焊盘 供应商设备封装:28-TSSOP 裸露焊盘 包装:管件 产品目录页面:1410 (CN2011-ZH PDF) |
| ADM1191-2ARMZ-R71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Digital Power Monitor with Convert Pin and ALERTB O |
| ADM1192 | 制造商:AD 制造商全称:Analog Devices 功能描述:Digital Power Monitor with Clear Pin and ALERT Output |
| ADM1192_08 | 制造商:AD 制造商全称:Analog Devices 功能描述:Digital Power Monitor with Clear Pin and ALERT Output |
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