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| 型号： | AD1580ARTZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC VREF SHUNT PREC 1.225V SOT23 |
| 标准包装： | 1 |
| 基准类型： | 旁路，精度 |
| 输出电压： | 1.225V |
| 容差： | ±0.1% |
| 温度系数： | 100ppm/°C |
| 通道数： | 1 |
| 电流 - 阴极： | 50µA |
| 电流 - 输出： | 10mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23-3 |
| 包装： | 标准包装 |
| 产品目录页面： | 795 (CN2011-ZH PDF) |
| 其它名称： | AD1580ARTZ-REEL7DKR |
AD1580
TRANSIENT RESPONSE
Many ADC and DAC converters present transient current
loads to the reference. Poor reference response can degrade
the converter’s performance.
of the device to load transients of ±50 μA.
PRECISION MICROPOWER LOW DROPOUT
REFERENCE
The circuit in Figure 24 provides an ideal solution for making
a stable voltage reference with low standby power consumption,
low input/output dropout capability, and minimum noise output.
The amplifier both buffers and optionally scales up the AD1580
output voltage, V R . Output voltages as high as 2.1 V can supply
20mV/DIV
1mV/DIV
I R = 100μA + 50μA STEP
1 mA of load current. A one-pole filter connected between the
AD1580 and the OP193 input can be used to achieve low output
noise. The nominal quiescent power consumption is 200 μW.
(a)
3V
34.8k ?
205 ?
OP193
V OUT = +1.225V
OR
I R = 100μA – 50μA STEP
(b)
AD1580
4.7μF
R3
R2
V OUT = +1.225 (1 + R2/R3)
20mV/DIV
1mV/DIV
1μs/DIV
Figure 22. Transient Settling
an increased reverse current of 50 μA. Figure 22b shows the
response when the reverse current is decreased by 50 μA.
The transients settle to 1 mV in about 3 μs.
Attempts to drive a large capacitive load (in excess of 1000 pF) may
This is due to the additional poles formed by the load capacit-
ance and the output impedance of the reference. A recommended
method of driving capacitive loads of this magnitude is shown
in Figure 20. A resistor isolates the capacitive load from the
output stage, while the capacitor provides a single-pole low-pass
filter and lowers the output noise.
Figure 24. Micropower Buffered Reference
USING THE AD1580 WITH 3 V DATA CONVERTERS
The AD1580 low output drift (50 ppm/°C) and compact submi-
niature SOT-23 package make it ideally suited for today’s high
performance converters in space critical applications.
One family of ADCs for which the AD1580 is well suited is the
AD7714-3 and AD7715-3. The AD7714/AD7715 are charge-
balancing ( ∑-?) 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 25 shows the AD1580 connected to the
AD7714-3/AD7715-3 for 3 V operation.
3V
2 .0 V
34.8k ?
AD7714-3 AND AD7715–3
1.8V
V IN
AD1580
REFIN(+)
REFIN(–)
R SW
5k ? (TYP)
C REF
HIGH
IMPEDANCE
>1G ?
(3pF TO 8pF)
SWITCHING
FREQUENCY DEPENDS
ON f CLKIN
C L = 0.01μF
Figure 25. Reference Circuit for the AD7714-3 and AD7715-3
10mV/DIV
50μs/DIV
Figure 23. Transient Response with Capacitive Load
Rev. F | Page 9 of 12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD1580ARTZ-REEL7 | 制造商:Analog Devices 功能描述:Voltage Reference |
| AD1580B | 制造商:AD 制造商全称:Analog Devices 功能描述:1.2 V Micropower, Precision Shunt Voltage Reference |
| AD1580BKSZ-REEL | 功能描述:IC VREF SHUNT PREC 1.225V SC70-3 RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 产品培训模块:Voltage Reference Basics 标准包装:100 系列:- 基准类型:旁路，精度 输出电压:4.096V 容差:±0.075% 温度系数:50ppm/°C 输入电压:- 通道数:1 电流 - 阴极:1µA 电流 - 静态:- 电流 - 输出:10mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:管件 |
| AD1580BKSZ-REEL7 | 功能描述:IC VREF SHUNT PREC 1.225V SC70-3 RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:3,000 系列:- 基准类型:旁路，精度 输出电压:3V 容差:±0.5% 温度系数:100ppm/°C 输入电压:- 通道数:1 电流 - 阴极:82µA 电流 - 静态:- 电流 - 输出:15mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-TSSOP（5 引线），SC-88A，SOT-353 供应商设备封装:SC-70-5 包装:带卷 (TR) 其它名称:296-20888-2 |
| AD1580BRT | 制造商:AD 制造商全称:Analog Devices 功能描述:1.2 V Micropower, Precision Shunt Voltage Reference |
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