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參數資料
| 型號： | ADR1581 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 1.25 V Micropower, Precision Shunt Voltage Reference |
| 中文描述： | 1.25 V微，精密并聯電壓基準 |
| 文件頁數： | 10/12頁 |
| 文件大小： | 491K |
| 代理商： | ADR1581 |
ADR1581
USING THE ADR1581 WITH 3 V DATA
CONVERTERS
The ADR1581 low output drift (50 ppm/°C) and compact
subminiature SOT-23 package make it ideally suited for today’s
high performance converters in space-critical applications.
Rev. 0 | Page 10 of 12
The ADR1581 is ideal for creating the reference level to use
with 12-bit multiplying DACs, such as the AD7943, AD7945,
and AD7948. In the single-supply bias mode (see Figure 25), the
impedance seen looking into the I
OUT2
terminal changes with
DAC code. If the ADR1581 drives I
OUT2
and AGND directly, less
than 0.2 LSBs of additional linearity error results. The buffer amp
eliminates linearity degradation resulting from variations in the
reference level.
One family of ADCs for which the ADR1581 is well suited is the
AD7714-3
and
AD7715-3
. The AD7714/AD7715 are charge-
balancing (∑-Δ) ADCs with on-chip digital filtering intended for
the measurement of wide dynamic range, low frequency signals,
such as those representing chemical, physical, or biological
processes.
Figure 24 shows the ADR1581 connected to the
AD7714/AD7715 for 3 V operation.
DAC
R
FB
AGND
DGND
A1
C1
3.3V
29.4k
3.3V
ADR1581
SIGNAL GROUND
A1: OP295
AD822
OP2283
A1
V
REF
V
IN
V
DD
I
OUT1
I
OUT2
V
OUT
AD7943
0
AD7714-3/AD7715-3
ADR1581
3V
28.7k
REF IN(+)
REF IN(–)
HIGH
IMPEDANCE
>1G
R
5k
(TYP)
C
(3pF TO 8pF)
SWITCHING
FREQUENCY DEPENDS
ON
f
CLKIN
0
Figure 24. Reference Circuit for the AD7714-3/AD7715-3
Figure 25. Single-Supply System
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相關代理商/技術參數 |
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| ADR1581ARTZ-R2 | 功能描述:IC VREF SHUNT PREC 1.25V SOT23-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:- 產品培訓模塊:Voltage Reference Basics 標準包裝:100 系列:- 基準類型:旁路，精度 輸出電壓:4.096V 容差:±0.075% 溫度系數:50ppm/°C 輸入電壓:- 通道數:1 電流 - 陰極:1µA 電流 - 靜態:- 電流 - 輸出:10mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOIC 包裝:管件 |
| ADR1581ARTZ-R21 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1.25 V Micropower, Precision Shunt Voltage Reference |
| ADR1581ARTZ-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:1.25 V Micropower, Precision Shunt Voltage Reference |
| ADR1581ARTZ-REEL7 | 功能描述:IC VREF SHUNT PREC 1.25V SOT23-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:- 標準包裝:3,000 系列:- 基準類型:旁路，精度 輸出電壓:3V 容差:±0.5% 溫度系數:100ppm/°C 輸入電壓:- 通道數:1 電流 - 陰極:82µA 電流 - 靜態:- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-TSSOP（5 引線），SC-88A，SOT-353 供應商設備封裝:SC-70-5 包裝:帶卷 (TR) 其它名稱:296-20888-2 |
| ADR1581ARTZ-REEL71 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1.25 V Micropower, Precision Shunt Voltage Reference |
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