查看PT100/PT1000 工业级温度传感器的源代码

== 电压基准 ==

对于传感器测量应用，基准输出用作ADC或AFE输入，也用作变送器激励。如果噪声或其它原因造成基准电压波动，传感器输入和ADC都将发生相同的波动，从而降低总误差

压基基准噪声源降低 ADC 的噪声性能，所以应选择性能优于 ADC 的基准。对于高精度系统，基准的初始误差以及温漂和时漂是增益误差的最重要因素之一。对于经过校准的系统，温漂和时漂是最关键的参数

选择基准时的关键参数包括：负载驱动、初始精度、噪声、温漂和稳定度

=== TL431 ===

* http://www.ti.com/lit/ds/symlink/tl431.pdf

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=== MAX ===

* https://www.maximintegrated.com/cn/app-notes/index.mvp/id/2879

<source lang=bash>
Maxim电压基准的精简列表
Part Number	Output Voltage (V)	Supply Voltage Range (V)	Temp. Drift (ppm/°C max)	Initial Accuracy TA = +25°C (% F.S. max)	Quiescent Current (mA max)	0.1Hz to 10Hz Noise (µVP-P), max (typ)	Package Options	Temp. Ranges*
MAX6160	Adj.(1.23 to 12.4)	2.7 to 12.6	100	1	100µA	(15)	SOT143, SO	E
MAX6120	1.2	2.4 to 11	100	1	70µA	(10)	SOT23, SO	E
MAX6520	1.2	2.4 to 12.6	50	1	70µA	(10)	SOT23, SO	E
MAX6001	1.25	2.5 to 12.6	100	1	45µA	25	SOT23	E
MAX6012	1.25	2.5 to 12.6	20 to 30	0.3 to 0.5	35µA	25	SOT23	E
MAX6190	1.25	2.5 to 12.6	5 to 25	0.16 to 0.48	35µA	25	SO	E
MAX6021	2.048	2.5 to 12.6	20 to 30	0.2 to 0.4	35µA	40	SOT23	E
MAX6191	2.048	2.5 to 12.6	5 to 25	0.1 to 0.5	35µA	40	SO	E
MAX873	2.5	4.5 to 18	7 to 20	0.06 to 0.1	28µA	(16)	DIP, SO	C, E
MAX6002	2.5	2.7 to 12.6	100	1	45µA	60	SOT23	E
MAX6025	2.5	2.7 to 12.6	20 to 30	0.2 to 0.4	35µA	60	SOT23	E
MAX6125	2.5	2.7 to 12.6	50	1	100µA	(15)	SOT23, SO	E
MAX6192	2.5	2.7 to 12.6	5 to 25	0.1 to 0.4	35µA	60	SO	E
MAX6225	2.5	8 to 36	2 to 5	0.04 to 0.1	2.7	(1.5)	DIP, SO	C, E
MAX6325	2.5	8 to 36	1 to 2.5	0.04	2.7	(1.5)	DIP, SO	C, E
MAX6003	3	3.2 to 12.6	100	1	45µA	75	SOT23	E
MAX6030	3	3.2 to 12.6	20 to 30	0.2 to 0.4	35µA	75	SOT23	E
MAX6193	3	3.2 to 12.6	5 to 25	0.07 to 0.33	35µA	75	SO	E
MAX6004	4.096	4.3 to 12.6	100	1	45µA	100	SOT23	E
MAX6041	4.096	4.3 to 12.6	20 to 30	0.2 to 0.4	35µA	100	SOT23	E
MAX6141	4.096	4.3 to 12.6	50	1	105µA	(25)	SOT23, SO	E
MAX6198	4.096	4.3 to 12.6	5 to 25	0.05 to 0.24	35µA	100	SO	E
MAX6241	4.096	8 to 36	2 to 5	0.025 to 0.1	2.9	(2.4)	DIP, SO	C, E
MAX6341	4.096	8 to 36	1 to 2.5	0.025	2.9	(1.5)	DIP, SO	C, E
MAX6045	4.5	4.7 to 12.6	20 to 30	0.2 to 0.4	35µA	110	SOT23	E
MAX6145	4.5	4.7 to 12.6	50	1	105µA	(30)	SOT23, SO	E
MAX6194	4.5	4.7 to 12.6	5 to 25	0.04 to 0.22	35µA	110	SO	E
MAX675	5	8 to 33	12 to 20	0.15	1.4	15	TO-99, DIP, SO	C, E
MAX875	5	7 to 18	7 to 20	0.06 to 0.1	0.28	(32)	DIP, SO	C, E
MAX6005	5	5.2 to 12.6	100	1	45µA	120	SOT23	E
MAX6050	5	5.2 to 12.6	20 to 30	0.2 to 0.4	35µA	120	SOT23	E
MAX6150	5	5.2 to 12.6	50	1	110µA	(35)	SOT23, SO	E
MAX6195	5	5.2 to 12.6	5 to 25	0.04 to 0.2	35µA	120	SO	E
MAX6250	5	8 to 36	2 to 5	0.02 to 0.1	3	(3)	DIP, SO	C, E
MAX6350	5	8 to 36	1 to 2.5	0.02	3	(1.5)	DIP, SO	C, E
REF02	5	8 to 33	8.5 to 250	0.3 to 2	1.4	15	TO-99, DIP, SO	C
*温度范围：C = 0°C至+70°C，E = -40°C至85°C

文献
The Art of Electronics, by Paul Horowitz & Winfield Hill, Chapter 6
Micro-Electronic Circuits, by Adel S. Sedra & Kenneth C. Smith
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