參數(shù)資料
型號(hào)： AD7416
廠商： Analog Devices, Inc.
元件分類： 溫度/濕度傳感器
英文描述： 10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
中文描述： 10位數(shù)字溫度傳感器（I2C接口芯片AD7416）和單/四通道ADC（AD7417/AD7418）
文件頁數(shù)： 10/20頁
文件大?。?/td> 325K
代理商： AD7416
REV. G
–10–
AD7416/AD7417/AD7418
ADDRESS POINTER REGISTER
The Address Pointer Register is an 8-bit register that stores an
address that points to one of the six data registers. The first data
byte of every serial write operation to the AD7416/AD7417/
AD7418 is the address of one of the data registers, which is
stored in the Address Pointer Register, and selects the data
register to which subsequent data bytes are written. Only the
three LSBs of this register are used to select a data register.
Table I. Address Pointer Register
P7
*
P6
*
P5
*
P4
*
P3
*
P2
P1
P0
0
0
0
0
0
Register Select
*
P3 to P7 must be set to 0.
Table II. Register Addresses
P2
P1
P0
Registers
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
Temperature Value (Read-Only)
Config Register (Read/Write)
T
HYST
(Read/Write)
T
OTI
ADC (AD7417/AD7418 Only)
Config2 (AD7417/AD7418 Only)
TEMPERATURE VALUE REGISTER (ADDRESS 00h)
The Temperature Value Register is a 16-bit, read-only register
whose 10 MSBs store the temperature reading from the ADC in
10-bit twos complement format. Bits 5 to 0 are unused.
Table III. Temperature Value Register
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
MSB B8
B7
B6
B5
B4
B3
B2
B1
LSB
The temperature data format is shown in Table IV. This shows
the full theoretical range of the ADC from
–
128
°
C to +127
°
C,
but in practice, the temperature measurement range is limited
to the operating temperature range of the device.
Table IV. Temperature Data Format
Temperature
–
128
°
C
–
125
°
C
–
100
°
C
–
75
°
C
–
50
°
C
–
25
°
C
–
0.25
°
C
0
°
C
+0.25
°
C
+10
°
C
+25
°
C
+50
°
C
+75
°
C
+100
°
C
+125
°
C
+127
°
C
Digital Output
10 0000 0000
10 0000 1100
10 0111 0000
10 1101 0100
11 0011 1000
11 1001 1100
11 1111 1111
00 0000 0000
00 0000 0001
00 0010 1000
00 0110 0100
00 1100 1000
01 0010 1100
01 1001 0000
01 1111 0100
01 1111 1100
Figure 5 shows the method the AD7416/AD7417/AD7418 uses
to measure the device temperature. To measure
V
BE
, the sen-
sor (substrate transistor) is switched between operating currents
of I and N
×
I. The resulting waveform is passed through a
chopper-stabilized amplifier that performs the functions of
amplification and rectification of the waveform to produce a dc
voltage proportional to
V
BE
.
This voltage is measured by the ADC to give a temperature
output in 10-bit twos complement form.
The temperature resolution of the ADC is 0.25
°
C, which corre-
sponds to 1 LSB of the ADC. The ADC can theoretically measure
a temperature span of 255
°
C; the guaranteed temperature range
is
–
40
°
C to +125
°
C. The result of the conversion is stored in
the Temperature Value Register (00h) as a 16-bit word. The
10 MSBs of this word store the temperature measurement (see
Table III and Table IV).
The temperature conversion formula using the 10 MSBs of the
Temperature Value Register is
1.
Positive Temperature = ADC Code/
4
2.
Negative Temperature = (ADC Code
*
–
512)/4
*
MSB is removed from the
ADC Code
.
INTERNAL REGISTER STRUCTURE
The AD7417/AD7418 has seven internal registers, as shown in
Figure 6. Six of these are data registers and one is an Address
Pointer Register. The AD7416 has five internal registers (the
ADC and Config2 Registers are not applicable to the AD7416).
T
HYST
SETPOINT
(READ/WRITE
ADDRESS 02h)
CONFIGURATION
REGISTER
(READ/WRITE
ADDRESS 01h)
T
OTI
SETPOINT
REGISTER
(READ/WRITE
ADDRESS 03h)
SERIAL
BUS
INTERFACE
SCL
TEMPERATURE
VALUE
REGISTER
(READ-ONLY
ADDRESS 00h)
ADDRESS POINTER
REGISTER
(SELECTS DATA REGISTER
FOR READ/WRITE)
ADDRESS
DATA
CONFIG2
REGISTER
(READ/WRITE
ADDRESS 05h)
ADC
REGISTER
(READ-ONLY
ADDRESS 04h)
SDA
Figure 6. AD7417/AD7418 Register Structure
相關(guān)PDF資料
PDF描述
AD7416-7418 10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
AD7416ACHIPS ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84%
AD7416AR 10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
AD7416ARM 10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
AD7416ARM-REEL ECONOLINE: REC2.2-S_DR/H1 - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75%
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7416_10 制造商:AD 制造商全稱:Analog Devices 功能描述:10-Bit Digital Temperature Sensor (AD7416) and Four Single-Channel ADCs
AD7416-7418 制造商:AD 制造商全稱:Analog Devices 功能描述:10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
AD7416ACHIPS 制造商:AD 制造商全稱:Analog Devices 功能描述:10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
AD7416AR 功能描述:IC SENSOR TEMP 10BIT 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠(yuǎn)程（最大） 拓?fù)?ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報(bào):是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
AD7416ARM 功能描述:IC SENSOR TEMP 10BIT 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠(yuǎn)程（最大） 拓?fù)?ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報(bào):是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
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