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| 型号： | DS4303R+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/8页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES ADJ SOT-23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 3,000 |
| 基准类型： | 系列，可调式 |
| 输出电压： | 0.3 V ~ 3.3 V |
| 容差： | ±0.03% |
| 温度系数： | 62ppm/°C |
| 输入电压： | 2.4 V ~ 3.6 V |
| 通道数： | 1 |
| 电流 - 静态： | 1.6mA |
| 电流 - 输出： | 1mA（最小值） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
Electronically Programmable
Voltage Reference
Pin Description
Detailed Description
The DS4303 provides a precise, NV output voltage,
PIN
1
2
3
4
5
NAME
ADJ
GND
V IN
V OUT
V CC
FUNCTION
Adjust Control Input
Ground
Sample Voltage Input
Voltage Output
Power-Supply Voltage
V OUT , making it an ideal solution for factory calibration
of embedded systems. The DS4303 output voltage can
be adjusted over almost the entire operating supply
range of the device, and it can be precisely set to with-
in ±1mV. A graphical description of the DS4303 is pro-
vided in the block diagram.
During factory calibration, a simple adjustment proce-
dure must be followed. This entire procedure includes
setting V IN , toggling ADJ , waiting as V OUT self-adjusts,
V CC
Block Diagram
and waiting for the completion of the EEPROM storage
cycle (See the timing diagram in Figure 1). At the start
of calibration, a voltage must be placed on V IN . This
voltage needs to be completely stable before the
adjustment procedure begins, and it must remain sta-
ble throughout the entire adjustment procedure. The
ADJ
V IN
V CC
R PU
V CC
R PD
ADC
AND
CONTROL
DS4303
12-BIT
DAC
V REF
V OUT
DS4303 will start its self-adjust procedure when the
ADJ pin is pulled low and held low for at least t ADJ ,
after which it can be released at any time. Once ADJ
has been released, it should not be toggled again for
the remainder of the adjustment procedure. After the
falling edge on ADJ and the wait time, t ADJ , the V OUT
self-adjust period begins. The length of the V OUT self-
GND
V OUT
V IN
ADJ
EEPROM
? V OUT x t ST
? V OUT
t W
? V OUT
adjust period can be determined using the formula
? V x t ST , where ? V is | V OUT OLD - V OUT NEW |.
? V OUT x t ST
t W
t ADJ
Figure 1. Timing Diagram
FIRST PROGRAMMING CYCLE
t ADJ
t ADJ
ADDITIONAL PROGRAMMING CYCLES (IF REQUIRED)
6
_____________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS4303R-U | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| DS4303R-U+ | 功能描述:基准电压& 基准电流 Electronically Programmable RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| DS4304FP000 | 制造商:Thomas & Betts 功能描述:400A,CON,3P4W,MG,304,277/480V |
| DS4304MP000 | 制造商:Thomas & Betts 功能描述:400A,PLG,3P4W,MG,304,277/480V |
| DS4304MP00K | 制造商:Thomas & Betts 功能描述:RS DS4304MP00K 400A, PLG, 3P4W,304, |
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