ATtiny45汽车级芯片150°C规格详细中文文档
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更新于2024-07-24
收藏 305KB PDF 举报 "ATTINY45-15MT2是一款8位微控制器，具有4K字节的在系统可编程闪存，特别适用于汽车电子应用。此中文资料详细介绍了该芯片在150°C高温下的电气特性及绝对最大额定值。"
在了解ATTINY45-15MT2这款微控制器时，首先要注意的是它的工作温度范围，能够承受从-55°C到+150°C的极端环境，这使其非常适合于汽车行业的严苛条件。这样的工作温度范围确保了在汽车引擎舱等高温环境下也能保持稳定的工作性能。
文档中提到的"Absolute Maximum Ratings"（绝对最大额定值）是器件设计的重要参数，超出了这些限制可能会导致设备永久损坏。例如，任何引脚（除了RESET引脚）相对于接地(GND)的最大电压不应超过规定的值，否则可能导致器件内部结构的破坏。这不仅仅是对器件承受应力的评级，而是强调在超过操作规格的条件下运行可能会降低设备的可靠性。长时间暴露在绝对最大额定条件下可能影响器件的寿命。
此外，存储温度范围从-65°C到+175°C，这意味着在不使用器件时，即使在这样的温度下存放，器件也应能保持完好。这确保了在各种存储环境下的安全性。
ATtiny45是一款8位微控制器，8位架构意味着它一次可以处理8位数据，适合于对处理能力要求较低但对成本和功耗有严格要求的应用。4K字节的在系统可编程(ISP)闪存允许在不拆卸设备的情况下进行程序更新和调试，极大地提高了设计的灵活性和便利性。
这款微控制器的电气特性包括其直流特性，如电源电压、I/O引脚的驱动能力和输入/输出电平等，这些在汽车应用中都是至关重要的，因为它们直接影响到与其它汽车电子系统的互操作性和兼容性。
总结来说，ATTINY45-15MT2是一款专为高温环境设计的8位微控制器，具有强大的耐温能力和灵活的在系统编程功能，适用于需要高可靠性和适应极端温度条件的汽车电子应用。这款芯片通过其电气特性、工作和存储温度范围以及绝对最大额定值，确保了在汽车行业的广泛适用性。对于工程师来说，这份中文资料提供了关键的硬件设计和应用指南。
5
7696B–AUTO–04/08
ATtiny45 Automotive
ADC Characteristics
(6)
Notes: 1. “Max” means the highest value where the pin is guaranteed to be read as low
2. “Min” means the lowest value where the pin is guaranteed to be read as high
3. Although each I/O port can sink more than the test conditions (20mA at V
CC
= 5V) under steady state conditions (non-tran-
sient), the following must be observed:
1] The sum of all IOL, for all ports, should not exceed 400 mA.
2] The sum of all IOL, for ports C0 - C5, should not exceed 200 mA.
3] The sum of all IOL, for ports C6, D0 - D4, should not exceed 300 mA.
4] The sum of all IOL, for ports B0 - B7, D5 - D7, should not exceed 300 mA.
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test condition.
4. Although each I/O port can source more than the test conditions (20mA at Vcc = 5V) under steady state conditions (non-
transient), the following must be observed:
1] The sum of all IOH, for all ports, should not exceed 400 mA.
2] The sum of all IOH, for ports C0 - C5, should not exceed 200 mA.
3] The sum of all IOH, for ports C6, D0 - D4, should not exceed 300 mA.
4] The sum of all IOH, for ports B0 - B7, D5 - D7, should not exceed 300 mA.
If IOH exceeds the test condition, VOH may exceed the related specification. Pins are not guaranteed to source current
greater than the listed test condition.
5. Minimum V
CC
for Power-down is 2.5V.
T
A
= +125°C to 150°C, V
CC
= 4.5V to 5.5V (unless otherwise noted)
Symbol Parameter Condition Min Typ Max Units
Resolution 10 Bits
Absolute accuracy
(Including INL, DNL,
quantization error, gain
and offset error)
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
2 3.5 LSB
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
Noise Reduction Mode
2 3.5 LSB
Integral Non-Linearity
(INL)
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
0.6 2.5 LSB
Differential Non-Linearity
(DNL)
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
0.30 1.0 LSB
Gain Error
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
-3.5 -1.3 3.5 LSB
Offset Error
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
1.8 3.5 LSB
Conversion Time
Free Running
Conversion
13 cycles µs
Clock Frequency 50 200 kHz
AV
CC
Analog Supply Voltage V
CC
- 0.3 V
CC
+ 0.3 V
V
REF
Reference Voltage 1.0
AV
CC
V
V
IN
Input Voltage GND V
REF
- 50mV V
Input Bandwidth 38.5 kHz
V
INT
Internal Voltage
Reference
1.0 1.1 1.2 V
R
REF
Reference Input
Resistance
25.6 32 38.4 kΩ
R
AIN
Analog Input Resistance 100 MΩ
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