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| 型号： | ADR421BRZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 2.5V 8-SOIC |
| 设计资源： | 40 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5380 (CN0007) 40 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5381 (CN0010) 32 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5382 (CN0011) 32 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5383 (CN0014) 8 to 16 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5390/1/2 (CN0029) High Precision Digital-to-Analog Conversion Using the 16-Bit AD5542/1, ADR421, and AD8628 (CN0079) 16 Channels of Programmable Output Span Using AD5360 (CN0131) Layout Considerations for an Expandable Multichannel Simultaneous Sampling Data Acquisition System Based on AD7606 (CN0148) 40 Channels of Programmable Output Span Using AD5371 (CN0149) Software Calibrated, 1 MHz to 8 GHz, 70 dB RF Power Measurement System Using AD8318 (CN0150) How to Achieve High Precision Voltage Level Setting Using AD5541A/42A (CN0169) |
| 标准包装： | 98 |
| 系列： | XFET® |
| 基准类型： | 串联，精度 |
| 输出电压： | 2.5V |
| 容差： | ±0.04% |
| 温度系数： | 3ppm/°C |
| 输入电压： | 4.5 V ~ 18 V |
| 通道数： | 1 |
| 电流 - 静态： | 500µA |
| 电流 - 输出： | 10mA |
| 工作温度： | -40°C ~ 125°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-SO |
| 包装： | 管件 |
| 产品目录页面： | 796 (CN2011-ZH PDF) |
Data Sheet
PRECISION VOLTAGE REFERENCE FOR DATA
CONVERTERS
The ADR42x family has a number of features that make it ideal
for use with ADCs and DACs. The exceptionally low noise,
tight temperature coefficient, and high accuracy characteristics
make the ADR42x ideal for low noise applications such as
cellular base station applications.
AD7701 is an example of an ADC that is well suited for the
ADR42x. The ADR421 is used as the precision reference for
the converter in Figure 48. The AD7701 is a 16-bit ADC with
on-chip digital filtering intended for measuring wide dynamic
ADR420/ADR421/ADR423/ADR425
PRECISION BOOSTED OUTPUT REGULATOR
A precision voltage output with boosted current capability
can be realized with the circuit shown in Figure 49. In this
circuit, U2 forces V OUT to be equal to V REF by regulating the turn
on of N1. Therefore, the load current is furnished by V IN . In
this configuration, a 50 mA load is achievable at V IN of 5 V.
Moderate heat is generated on the MOSFET, and higher current
can be achieved by replacing the larger device. In addition, for
a heavy capacitive load with step input, a buffer may be added
at the output to enhance the transient response.
N1
range and low frequency signals, such as those representing
chemical, physical, or biological processes. It contains a charge-
V IN
2 U1
5V
R L
25 ?
V OUT
balancing (Σ-?) ADC, calibration microcontroller with on-chip
static RAM, clock oscillator, and serial communications port.
+5V
ANALOG
SUPPLY 0.1μF 10μF
AD7701
V IN
V OUT 6
ADR421
5
TRIM
GND
4
2N7002
+ V+
U2
AD8601
– V–
V IN
V OUT
AV DD
V REF
DV DD
SLEEP
MODE
0.1μF
Figure 49. Precision Boosted Output Regulator
0.1μF
ADR420/
ADR421/
ADR423/
ADR425
GND
DRDY
CS
SCLK
SDATA
DATA READY
READ (TRANSMIT)
SERIAL CLOCK
SERIAL CLOCK
CLKIN
RANGES
SELECT
CALIBRATE
ANALOG
INPUT
BP/UP
CAL
A IN
CLKOUT
SC1
SC2
ANALOG
GROUND
0.1μF
AGND
AV SS
DGND
DV SS
0.1μF
–5V
ANALOG
SUPPLY
0.1μF
10μF
Figure 48. Voltage Reference for 16-Bit ADC AD7701
Rev. J | Page 21 of 24
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADR421BRZ | 制造商:Analog Devices 功能描述:Voltage Reference IC |
| ADR421BRZ-REEL7 | 功能描述:IC VREF SERIES PREC 2.5V 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 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 |
| ADR423 | 制造商:AD 制造商全称:Analog Devices 功能描述:Ultraprecision Low Noise, 2.048 V/2.500 V/ 3.00 V/5.00 V XFET Voltage References |
| ADR423AR | 制造商:Analog Devices 功能描述:V-Ref Precision 3V 10mA 8-Pin SOIC N Tube 制造商:Rochester Electronics LLC 功能描述:3.0 VOLTAGE REFERENCE - Bulk 制造商:Analog Devices 功能描述:IC VOLT REF |
| ADR423ARM | 制造商:Analog Devices 功能描述:V-Ref Precision 3V 10mA 8-Pin MSOP Tube 制造商:Rochester Electronics LLC 功能描述:3.0 VOLTAGE REFERENCE - Bulk |
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