- 您現在的位置：買賣IC網 > PDF目錄374038 > ADT7519ARQZ1-REEL7 (Analog Devices, Inc.) SPI/I2C Compatible, Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC PDF資料下載
參數資料
| 型號： | ADT7519ARQZ1-REEL7 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | SPI/I2C Compatible, Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC |
| 中文描述： | SPI/I2C兼容，溫度傳感器，四通道ADC和四路電壓輸出DAC |
| 文件頁數： | 21/44頁 |
| 文件大小： | 1350K |
| 代理商： | ADT7519ARQZ1-REEL7 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
ADT7516/ADT7517/ADT7519
DAC Reference Inputs
There is an input reference pin for the DACs. This reference
input is buffered (see Figure 44).
Rev. A | Page 21 of 44
The advantage with the buffered input is the high impedance it
presents to the voltage source driving it. The user can have an
external reference voltage as low as 1 V and as high as V
DD
. The
restriction of 1 V is due to the footroom of the reference buffer.
The LDAC configuration register controls the option to select
between internal and external voltage references. The default
setting is for external reference selected.
Output Amplifier
The output buffer amplifier can generate output voltages to
within 1 mV of either rail. Its actual range depends on the value
of V
REF
, gain, and offset error.
If a gain of 1 is selected (Bits 0 to 3 of the DAC configuration
register = 0), the output range is 0.001 V to V
REF
.
If a gain of 2 is selected (Bits 0 to 3 of the DAC configuration
register = 1), the output range is 0.001 V to 2 V
REF
. Because
of clamping, however, the maximum output is limited to
V
DD
– 0.001 V.
The output amplifier can drive a load of 4.7 k to GND or V
DD
,
in parallel with 200 pF to GND or V
DD
(see Figure 5). The
source and sink capabilities of the output amplifier can be seen
in the plot of Figure 20.
The slew rate is 0.7 V/μs with a half-scale settling time to
±0.5 LSB (at 8 bits) of 6 μs.
Thermal Voltage Output
The ADT7516/ADT7517/ADT7519 can output voltages that are
proportional to temperature. DAC A output can be configured
to represent the temperature of the internal sensor while DAC B
output can be configured to represent the external temperature
sensor. Bits C5 and C6 of the Control Configuration 3 register
select the temperature proportional output voltage. Each time a
temperature measurement is taken, the DAC output is updated.
The output resolution for the ADT7519 is 8 bits with 1°C
change corresponding to 1 LSB change. The output resolution
for the ADT7516 and ADT7517 are capable of 10 bits with
0.25°C change corresponding to 1 LSB change. The default
output resolution for the ADT7516 and ADT7517 is 8 bits. To
increase this to 10 bits, set C1 = 1 in the Control Configuration
3 register. The default output range is 0 V to V
REF
and this can be
increased to 0 V to 2 V
REF
. Increasing the output voltage span to
2 V
REF
can be done by setting D0 = 1 for DAC A (internal temp-
erature sensor) and D1 = 1 for DAC B (external temperature
sensor) in the DAC configuration register (Address 1Bh).
The output voltage is capable of tracking a maximum temp-
erature range of –128°C to +127°C, but the default setting is
–40°C to +127°C. If the output voltage range is 0 V to V
REF
-IN
(V
REF
-IN = 2.25 V), then this corresponds to 0 V representing
–40°C, and 1.48 V representing +127°C. This, of course, will
give an upper deadband between 1.48 V and V
REF
.
The internal and external analog temperature offset registers
can be used to vary this upper deadband and, consequently, the
temperature that 0 V corresponds to. Table 6 and Table 7 give
examples of how this is done using a DAC output voltage span
of V
REF
and 2 V
REF
, respectively. Simply write in the temperature
value, in twos complement format, at which 0 V is to start. For
example, if using the DAC A output and 0 V to start at –40°C,
program D8h into the internal analog temperature offset reg-
ister (Address 21h). This is an 8-bit register and has a temp-
erature offset resolution of only 1°C for all device models. Use
the formulas following the tables to determine the value to
program into the offset registers.
Table 6. Thermal Voltage Output (0 V to V
REF
)
O/P Voltage (V)
0
0.5
1
1.12
1.47
1.5
2
2.25
Default °C
–40
+17
+73
+87
+127
UDB
UDB
UDB
Max °C
–128
–71
–15
–1
+39
+42
+99
+127
Sample °C
0
+56
+113
+127
UDB
UDB
UDB
UDB
Upper deadband has been reached. DAC output is not capable of
increasing. See Fig
.
ure 9
C1
D–
D+
LOW-PASS
FILTER
f
C
= 65kHz
BIAS
V
DD
TO ADC
V
OUT+
V
OUT–
REMOTE
SENSING
TRANSISTOR
(2N3906)
OPTIONAL CAPACITOR, UP TO
3nF MAX. CAN BE ADDED TO
IMPROVE HIGH FREQUENCY
NOISE REJECTION IN NOISY
ENVIRONMENTS
I
N
×
I
I
BIAS
0
Figure 45. Signal Conditioning for External Diode Temperature Sensor
相關PDF資料 |
PDF描述 |
|---|---|
| ADT7516ARQ | SPI/I2C Compatible, Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC |
| ADT7517ARQ | SPI/I2C Compatible, Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC |
| ADT7519ARQ | SPI/I2C Compatible, Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC |
| ADT7519ARQ-REEL | SPI/I2C Compatible, Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC |
| ADT7517ARQ-REEL | SPI/I2C Compatible, Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADT7519ARQZ-REEL | 功能描述:IC SENSOR TEMP QD ADC/DAC 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:2,500 系列:SilentSense™ 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風扇: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） 供應商設備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND |
| ADT7519ARQZ-REEL7 | 功能描述:IC SENSOR TEMP QD ADC/DAC 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:2,500 系列:SilentSense™ 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風扇: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） 供應商設備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND |
| ADT7519ARZQ | 制造商:Analog Devices 功能描述: |
| ADT75ARM | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADT75ARM-REEL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
發布緊急采購，3分鐘左右您將得到回復。