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| 型号： | ADR431BRZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 20/24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) AD5390/91/92 Channel Monitor Function (CN0030) 16 Channels of Programmable Output Span Using AD5360 (CN0131) 40 Channels of Programmable Output Span Using AD5371 (CN0149) |
| 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： | 800µA |
| 电流 - 输出： | 30mA |
| 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) |
ADR430/ADR431/ADR433/ADR434/ADR435/ADR439
PROGRAMMABLE DAC REFERENCE VOLTAGE
quad, 12-bit voltage output DAC, one of its internal DACs
and an ADR43x voltage reference can be used as a common
programmable V REFX for the rest of the DACs. The circuit
PRECISION VOLTAGE REFERENCE FOR DATA
CONVERTERS
The ADR43x family has a number of features that make it ideal
for use with ADCs and DACs. The exceptional low noise, tight
temperature coefficient, and high accuracy characteristics make
the ADR43x ideal for low noise applications, such as cellular
base station applications.
ADR43x
V REFA
DAC A
V REFB
DAC B
V OUTA
V OUTB
R2
± 0.1%
R1 ± 0.1%
V REF
V IN
V OB = V REFX (D B )
Another example of an ADC for which the ADR431 is well
suited is the AD7701 . Figure 42 shows the ADR431 used as
the precision reference for this converter. The AD7701 is a 16-bit
ADC with on-chip digital filtering intended for the measurement
of wide dynamic range and low frequency signals, such as those
representing chemical, physical, or biological processes. It contains
a charge-balancing Σ-Δ ADC, a calibration microcontroller
with on-chip static RAM, a clock oscillator, and a serial
V REFC
DAC C
V OUTC
V OC = V REFX (D C )
communications port.
+5V
ANALOG
SUPPLY 0.1μF
10μF
AD7701
V REFD
DAC D
AD7398
V OUTD
V OD = V REFX (D D )
0.1μF
2
V IN
V OUT 6
ADR431
AV DD
V REF
DV DD
SLEEP
MODE
DRDY
0.1μF
DATA READY
Figure 41. Programmable DAC Reference
GND
CS
READ (TRANSMIT)
V REF × ? ? 1 +
?
=
? R1 ?
? 1 + × R2 ?
V REFX
?
?
The relationship of V REFX to V REF depends on the digital code
and the ratio of R1 and R2, given by
R2 ?
D
? 2 N R1 ?
where:
D is the decimal equivalent of the input code.
(6)
RANGES
SELECT
CALIBRATE
ANALOG
INPUT
ANALOG
GROUND
4
0.1μF
BP/UP
CAL
A IN
AGND
AV SS
SCLK
SDATA
CLKIN
CLKOUT
SC1
SC2
DGND
DV SS
SERIAL CLOCK
SERIAL CLOCK
0.1μF
N is the number of bits.
V REF is the applied external reference.
–5V
ANALOG
SUPPLY
0.1μF
10μF
V REFX is the reference voltage for DAC A to DAC D.
Table 10. V REFX vs. R1 and R2
Figure 42. Voltage Reference for the AD7701 16-Bit ADC
R1, R2
R1 = R2
R1 = R2
R1 = R2
R1 = 3R2
R1 = 3R2
R1 = 3R2
Digital Code
0000 0000 0000
1000 0000 0000
1111 1111 1111
0000 0000 0000
1000 0000 0000
1111 1111 1111
V REF
2 V REF
1.3 V REF
V REF
4 V REF
1.6 V REF
V REF
Rev. J | Page 20 of 24
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADR431BRZ | 制造商:Analog Devices 功能描述:REFERENCE VOLTAGE:2.5V |
| ADR431BRZ-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:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR) |
| ADR431TRZ-EP | 制造商:Analog Devices 功能描述:V-Ref Precision 2.5V 10mA 8-Pin SOIC N Tube 制造商:Analog Devices 功能描述:ENHANCED PLASTIC PROCESS - Rail/Tube 制造商:Analog Devices Inc. 功能描述:Voltage & Current References Enhanced Plastic Process 制造商:Analog Devices 功能描述:IC, VOLT REF, 2.5V, 1.5ppm/C 3mV SOIC-8; Topology:Series; Input Voltage Min:4.5V; Input Voltage Max:18V; Reference Voltage:2.5V; Reference Voltage Tolerance:3mV; Voltage Reference Case Style:SOIC; No. of Pins:8 ;RoHS Compliant: Yes 制造商:Analog Devices 功能描述:Voltage Ref. 2.5V 0.04% Low Noise SOIC8 |
| ADR431TRZ-EP-R7 | 制造商:Analog Devices 功能描述:V-Ref Precision 2.5V 10mA 8-Pin SOIC N T/R 制造商:Analog Devices 功能描述:ENHANCED PLASTIC PROCESS - Tape and Reel 制造商:Analog Devices 功能描述:IC VREF SERIES 2.5V 8-SOIC 制造商:Analog Devices Inc. 功能描述:Voltage & Current References Enhanced Plastic Process |
| ADR433 | 制造商:AD 制造商全称:Analog Devices 功能描述:Ultralow Noise XFET Voltage References with Current Sink and Source Capability |
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