参数资料
| 型号： | DS3911T+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 23/24页 |
| 文件大小： | 0K |
| 描述： | IC DAC 10BIT I2C QUAD 14TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 位数： | 10 |
| 数据接口： | I²C，串行 |
| 转换器数目： | 4 |
| 电压电源： | 单电源 |
| 功率耗散（最大）： | 1.74W |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x5） |
| 包装： | 管件 |
| 输出数目和类型： | 4 电压，单极 |
| 采样率（每秒）： | * |
DS3911
Temperature-Controlled, Nonvolatile,
I2C Quad DAC
8
Maxim Integrated
Detailed Description
The DS3911 operates in one of two modes: lookup table
(LUT) mode or digital-to-analog converter (DAC) mode.
In LUT mode, the DAC’s output is controlled as a func-
tion of the temperature measured by the device’s internal
temperature sensor and the pulse-density modulation
profile stored in the associated DAC’s LUT. In DAC mode,
the DAC’s output is controlled by the specific DAC’s DAC
VALUE register (DAC0 VALUE, DAC1 VALUE, DAC2
Detailed descriptions of these modes as well as additional
device features are discussed in subsequent sections.
Delta-Sigma DAC Output and Control
Four delta-sigma DAC outputs are provided, DAC0 to
DAC3. With the addition of an external RC filter, these
outputs provide four 10-bit resolution-analog outputs
with the full-scale range set by the input VREF pin. Each
output is either manually controlled or controlled using a
temperature-indexed LUT. A delta-sigma converter pro-
duces a digital output using pulse-density modulation.
It provides much lower output ripple than a standard
digital PWM output, given the same clock rate and filter
components.
Figure 2 shows two recommended filters. These external
RC filter components are chosen to greatly reduce the
output ripple while maintaining the desired response
time. Using resistors smaller than the recommended val-
ues can degrade the output accuracy.
The device’s delta-sigma outputs are 10 bits. For illus-
trative purposes, a 3-bit example is provided. Figure 3
shows each possible output of this 3-bit delta-sigma DAC.
The reference input voltage, VREF, is the supply voltage
for the output buffer of all DACs. The power supply con-
nected to VREF must be able to support the edge-rate
requirements of the delta-sigma outputs. In a typical
application, a 0.1FF capacitor should be connected
between the VREF and GND pins.
Figure 2. Recommended RC Filter for DAC Outputs
Figure 3. 3-Bit (8-Position) Delta-Sigma Example
DS3911
DAC
1k
1k
0.1F
VOLTAGE OUTPUT
DS3911
DAC
1k
1k
0.1F
CURRENT SINK
2k
1
2
3
4
5
6
7
0
DAC OUPUT
DAC
VALUE
REGISTER
SETTING
(3-BIT
EXAMPLE)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3911T+ | 功能描述:ADC / DAC多通道 Fast APD Bias RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| DS3911T+T | 功能描述:ADC / DAC多通道 Fast APD Bias RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| DS3920 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Fast Current Mirror |
| DS3920_1112 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Fast Current Mirror |
| DS3920T-001+ | 功能描述:电流和电力监控器、调节器 Fast APD Bias RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
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