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| 型号： | AD780BR |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES SHUNT PREC 8-SOIC |
| 设计资源： | Using AD8599 as an Ultralow Distortion Driver for the AD7991 (CN0043) Using AD8599 as an Ultralow Distortion Driver for the AD7995 (CN0044) Using AD8599 as an Ultralow Distortion Driver for the AD7999 (CN0045) Using AD7328 in Appls with Single-Ended Industrial-Level Signals (CN0047) AD5382 Channel Monitor Function (CN0012) AD5383 Channel Monitor Function (CN0015) AD5390/91/92 Channel Monitor Function (CN0030) Measuring -48 V High-Side Current Using AD629, AD8603, AD780, and AD7453 (CN0100) High Voltage, High Precision Current Sensing with Output Level Shifting Using AD8210 and AD8274 (CN0116) |
| 标准包装： | 1 |
| 基准类型： | 串联，并联，可调节，精度 |
| 输出电压： | ±2.5V，±3V |
| 容差： | ±1mV |
| 温度系数： | 3ppm/°C |
| 输入电压： | 4 V ~ 36 V |
| 通道数： | 1 |
| 电流 - 静态： | 1mA |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
AD780
5V
V SUPPLY
Data Sheet
2
+V IN
AD7884
2
0.1 ? F
1k ?
2N2907
3 +
2 –
1 ? F
V OUT
AD780
2.5V/3.0V
6
V REF + F
V REF + S
AD780
4
6
7
OP90
4
6
2.5k ?
10 ? F
V OUT
0.1 ? F
GND
4
SELECT
8
0.1 ? F
3.9 ?
Figure 21. Precision 3 V Reference for the AD7884 16-Bit, High Speed ADC
5k ?
0.01%
4k ?
0.01%
The AD780 is also ideal for use with higher resolution
converters, such as the AD7710/AD7711/AD7712 (see Figure
22. While these parts are specified with a 2.5 V internal
reference, the AD780 in 3 V mode can be used to improve the
absolute accuracy, temperature stability, and dynamic range. It
is shown in Figure 22 with the two optional noise reduction
capacitors.
5V
Figure 23. 4.5 V Reference from a Single 5 V Supply
NEGATIVE (–2.5 V) REFERENCE
The AD780 can produce a negative output voltage in shunt
mode by connecting the input and output to ground, and
connecting the AD780’s GND pin to a negative supply via a bias
2
AD7710
2
+V IN
7
NC
+V IN
1
NC
V OUT 6
1 ? F
V OUT
AD780
6
REF IN+
1 ? F
AD780
TRIM 5
100nF
3
GND
2.5V/3.0V
O/P SELECT
100 ? F
3
TEMP
GND
O/P SELECT
2.5V – NC
3.0V – GND
4
8
4
8
REF IN–
Figure 22. Precision 2.5 V or 3.0 V Reference for the
AD7710 High Resolution, Σ-Δ ADC
R=
V OUT – (V–)
I L + I S MIN
V–
–2.5 V OUT
NOTES
1. I L = LOAD CURRENT
2. I S MIN = MINIMUM SHUNT CURRENT
3. NC = NO CONNECT
4.5 V REFERENCE FROM 5 V SUPPLY
Some 5 V high resolution ADCs can accommodate reference
voltages up to 4.5 V. The AD780 can be used to provide a
precision 4.5 V reference voltage from a 5 V supply using the
circuit shown in Figure 23. This circuit provides a regulated
4.5 V output from a supply voltage as low as 4.7 V. The high
quality tantalum 10 μF capacitor, in parallel with the ceramic
AD780 0.1 μF capacitor and the 3.9 Ω resistor, ensures a low
Figure 24. Negative (?2.5 V Shunt Mode Reference)
A precise –2.5 V reference capable of supplying up to 100 mA to
a load can be implemented with the AD780 in series mode,
+5V
+V IN
2
output impedance around 50 MHz.
1k ?
OUT
AD780
–
+5V
6
4
8
CONNECT IF
–3V OUTPUT
DESIRED
–2.5V (I L ? 100mA)
OP07
2N3906
+
–5V
–5V
1000pF
Figure 25. ?2.5 V High Load Current Reference
Rev. F | Page 10 of 12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD780BR-REEL | 功能描述:IC VREF SERIES SHUNT PREC 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 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) |
| AD780BR-REEL7 | 功能描述:IC VREF SERIES SHUNT PREC 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 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) |
| AD780BRZ | 功能描述:IC VREF SERIES SHUNT PREC 8-SOIC 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 |
| AD780BRZ | 制造商:Analog Devices 功能描述:Voltage Reference IC |
| AD780BRZ | 制造商:Analog Devices 功能描述:VOLTAGE REFERENCE 2.5V OR 3V |
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