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ZHCSJA6B January 2019 – December 2021 MSP430FR5041 , MSP430FR5043 , MSP430FR50431 , MSP430FR6041 , MSP430FR6043 , MSP430FR60431

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机械数据 (封装 | 引脚)

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散热焊盘机械数据 (封装 | 引脚)

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8.13.11.1 REF, Built-In Reference

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)

PARAMETER		TEST CONDITIONS	V_CC	MIN	TYP	MAX	UNIT
V_REF+	Positive built-in reference voltage output	REFVSEL = {2} for 2.5 V, REFON = 1	2.7 V		2.5	±1.5%	V
		REFVSEL = {1} for 2.0 V, REFON = 1	2.2 V		2.0	±1.5%
		REFVSEL = {0} for 1.2 V, REFON = 1	1.8 V		1.2	±1.8%
Noise	RMS noise at VREF ⁽³⁾	From 0.1 Hz to 10 Hz, REFVSEL = {0}			30	130	µV
V_{OS_BUF_INT}	VREF ADC BUF_INT buffer offset⁽⁵⁾	T_A = 25°C, ADC on, REFVSEL = {0}, REFON = 1, REFOUT = 0		–16		+16	mV
V_{OS_BUF_EXT}	VREF ADC BUF_EXT buffer offset⁽⁴⁾	T_A = 25°C, REFVSEL = {0} , REFOUT = 1, REFON = 1 or ADC on		–16		+16	mV
AV_CC(min)	AVCC minimum voltage, Positive built-in reference active	REFVSEL = {0} for 1.2 V		1.8			V
		REFVSEL = {1} for 2.0 V		2.2
		REFVSEL = {2} for 2.5 V		2.7
I_REF+	Operating supply current into AVCC terminal⁽¹⁾	REFON = 1	3 V		19	26	µA
I_{REF+_ADC_BUF}	Operating supply current into AVCC terminal⁽¹⁾	ADC ON, REFOUT = 0, REFVSEL = {0, 1, or 2}, ADC12PWRMD = 0	3 V		247	400	µA
		ADC ON, REFOUT = 1, REFVSEL = {0, 1, 2}, ADC12PWRMD = 0	3 V		1053	1820
		ADC ON, REFOUT = 0, REFVSEL = {0, 1, 2}, ADC12PWRMD = 1	3 V		153	240
		ADC ON, REFOUT = 1, REFVSEL = {0, 1, 2}, ADC12PWRMD = 1	3 V		581	1030
		ADC OFF, REFON = 1, REFOUT = 1, REFVSEL = {0, 1, 2}	3 V		1105	1890
I_O(VREF+)	VREF maximum load current, VREF+ terminal	REFVSEL = {0, 1, 2}, AV_CC = AV_CC(min) for each reference level, REFON = REFOUT = 1		–1000		+10	µA
ΔV_out/ ΔI_o(VREF+)	Load-current regulation, VREF+ terminal	REFVSEL = {0, 1, 2}, I_O(VREF+) = +10 µA or –1000 µA, AV_CC = AV_CC(min) for each reference level, REFON = REFOUT = 1				1500	µV/mA
C_VREF+/-	Capacitance at VREF+ and VREF- terminals	REFON = REFOUT = 1		0		100	pF
TC_REF+	Temperature coefficient of built-in reference	REFVSEL = {0, 1, 2}, REFON = REFOUT = 1, T_A = –40°C to 85°C⁽⁶⁾			24	50	ppm/K
PSRR_DC	Power supply rejection ratio (DC)	AV_CC = AV_CC_(min) to AV_CC(max), T_A = 25°C, REFVSEL = {0, 1, 2}, REFON = REFOUT = 1			100	400	µV/V
PSRR_AC	Power supply rejection ratio (AC)	dAV_CC= 0.1 V at 1 kHz			3.0		mV/V
t_SETTLE	Settling time of reference voltage⁽²⁾	AV_CC = AV_CC_(min) to AV_CC(max), REFVSEL = {0, 1, 2}, REFON = 0 → 1			40	80	µs
T_{buf_settle}	Settling time of ADC reference voltage buffer⁽²⁾	AV_CC = AV_CC_(min) to AV_CC(max), REFVSEL = {0, 1, 2}, REFON = 1			0.4	2	µs

(1) The internal reference current is supplied through the AVCC terminal.

(2) The condition is that the error in a conversion started after t_REFON is less than ±0.5 LSB.

(3) Internal reference noise affects ADC performance when ADC uses the internal reference. See Designing With the MSP430FR59xx and MSP430FR58xx ADC for details on optimizing ADC performance for your application with the choice of internal or external reference.

(4) Buffer offset affects ADC gain error and thus total unadjusted error.

(5) Buffer offset affects ADC gain error and thus total unadjusted error.

(6) Calculated using the box method: (MAX(–40°C to 85°C) – MIN(–40°C to 85°C)) / MIN(–40°C to 85°C)/(85°C – (–40°C)).