TMP04: 温度传感器：CMOS/TTL兼容型串行数字输出温度计
TMP03/TMP04是一款调制的串行数字输出信号的单片温度检测器,其输出信号与温度成比例。TMP03/TMP04内置传感器产生的电压与绝对温度具有精密的比例关系,绝对温度与内部电压基准进行比较后输入至精密数字调制器。串行数字输出的比例（ratiometric）编码格式与电压-频率转换器等大多数串行调制技术中常见的时钟漂移误差无关。在-25°C ～ +100°C温度范围内,其整体精度是±1.5°C (典型值) ,具有卓越的传输线性。TMP04的数字输出是CMOS/TTL兼容的,容易实现与大多数普通微处理器串行输入的接口。TMP03的开集输出具有5 mA灌电流能力。TMP03是利用光电耦合器或隔离变压器进行隔离的系统最佳选择。TMP03/TMP04工作电源电压范围是4.5 V ～ 7 V。电源电压为+5 V时,消耗电流(未加负载)低于1.3 mA。TMP03/TMP04工作温度范围：-40°C ～ +100°C,采用低功耗TO-92、SO-8与TSSOP-8 SMT封装。工作温度扩展至+150°C时,精度有所下降。TMP03/TMP04是功能强大的完全温度测量系统,配备片上数字输出电路。 TMP01的内置温度传感器后面是低功耗可编程温度控制器,在整个额定温度范围内具有卓越的精度和线性度,不需要用户进行校正或校准。利用一阶∑-Δ调制器,也就是熟知的“电荷平衡”型模数转换器,可以实现传感器输出数字化。这类转换器利用时域过采样技术以及高精度比较器,在小型电路中提供12 bit的有效精度。∑-Δ调制器主要包括输入采样器、加法网络、积分器、比较器和1位数模转换器（DAC）。与电压-频率转换器类似,这种架构实际上生成一个负反馈环路,其目的是根据输入电压变化来改变比较器输出的占空比,从而使积分器输出最小。比较器对积分器输出进行采样,其采样速率要比输入采样频率高得多,称作过采样。这使得量化噪声在比输入信号宽得多的频段内扩展,改进了整个噪声性能,并提高了精度。利用电路技术（专利申请待批）对经过调制的比较器输出进行编码,该技术利用脉冲间隔比例格式生成串行数字信号,任何微处理器都可以将这种格式解码为摄氏温度或华氏温度值,并通过单线进行传输或调制。最重要的是,这个编码方法从根本上避免了其他调制技术中常见的主要误差源,因为它独立于时钟。
The TMP03/TMP04 is a monolithic temperature detector that generates a modulated serial digital output that varies in direct proportion to the temperature of the device. An onboard sensor generates a voltage precisely proportional to absolute temperature which is compared to an internal voltage reference and input to a precision digital modulator. The ratiometric encoding format of the serial digital output is independent of the clock drift errors common to most serial modulation techniques such as voltage-to- frequency converters. Overall accuracy is ±1.5°C (typical) from -25°C to +100°C, with excellent transducer linearity. The digital output of the TMP04 is CMOS/TTL compatible, and is easily interfaced to the serial inputs of most popular microprocessors. The open-collector output of the TMP03 is capable of sinking 5 mA. The TMP03 is best suited for systems requiring isolated circuits utilizing optocouplers or isolation transformers.The TMP03 and TMP04 are specified for operation at supply voltages from 4.5 V to 7 V. Operating from +5 V, supply current (unloaded) is less than 1.3 mA.The TMP03/TMP04 are rated for operation over the -40°C to +100°C temperature range in the low cost TO-92, SO-8, and TSSOP-8 surface mount packages. Operation extends to +150°C with reduced accuracy.The TMP03/TMP04 is a powerful, complete temperature measurement system with digital output, on a single chip. The onboard temperature sensor follows in the footsteps of the TMP01 low power programmable temperature controller, offering excellent accuracy and linearity over the entire rated temperature range without correction or calibration by the user.The sensor output is digitized by a first-order sigma-delta modulator, also known as the "charge balance" type analog-to-digital converter. This type of converter utilizes time-domain oversampling and a high accuracy comparator to deliver 12 bits of effective accuracy in an extremely compact circuit.Basically, the sigma-delta modulator consists of an input sampler, a summing network, an integrator, a comparator, and a 1-bit DAC. Similar to the voltage-to-frequency converter, this architecture creates in effect a negative feedback loop whose intent is to minimize the integrator output by changing the duty cycle of the comparator output in response to input voltage changes. The comparator samples the output of the integrator at a much higher rate than the input sampling frequency, called oversampling. This spreads the quantization noise over a much wider band than that of the input signal, improving overall noise performance and increasing accuracy.The modulated output of the comparator is encoded using a circuit technique (patent pending) which results in a serial digital signal with a mark-space ratio format that is easily decoded by any microprocessor into either degrees centigrade or degrees Fahrenheit values, and readily transmitted or modulated over a single wire. Most importantly, this encoding method neatly avoids major error sources common to other modulation techniques, as it is clock-independent
TMP04 特点
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TMP04 技术指标
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TMP04 芯片订购指南
| 产品型号 | 封装 | 引脚 | 温度范围 | 包装和数量 | 报价*(100-499) | 报价*1000 pcs |
|---|---|---|---|---|---|---|
| TMP04FS 产品状态: 量产 | 8 ld SOIC | 8 | 待定 | Tube, 98 | $ 3.97 | $ 3.59 |
| TMP04FS-REEL 产品状态: 量产 | 8 ld SOIC | 8 | 待定 | Reel, 2500 | - | - |
| TMP04FSZ 产品状态: 量产 | 8 ld SOIC | 8 | 待定 | Tube, 98 | $ 3.62 | $ 3.27 |
| TMP04FSZ-REEL 产品状态: 量产 | 8 ld SOIC | 8 | 待定 | Reel, 2500 | - | - |
| TMP04FT9 产品状态: 量产 | 3 ld TO-92 | 3 | 工业 | Tray, 100 | $ 3.97 | $ 3.59 |
| TMP04FT9Z 产品状态: 量产 | T092 | 3 | 工业 | Tray, 100 | $ 3.62 | $ 3.27 |
TMP04 应用技术支持与电子电路设计开发资源下载
- TMP04 数据手册DataSheet下载 .pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
- ADC模数转换器选型指南 . pdf
