ZHCSA42F 数据表 | 德州仪器 TI.com.cn

ZHCSA42F August 2010 – September 2020 MSP430F5333 , MSP430F5335 , MSP430F5336 , MSP430F5338

PRODUCTION DATA

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机械数据 (封装 | 引脚)

PZ|100
- MTQF013A

散热焊盘机械数据 (封装 | 引脚)

PZ|100
- QFND428

订购信息

8.41 REF, Built-In Reference

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)⁽¹⁾

PARAMETER		TEST CONDITIONS		V_CC	MIN	TYP	MAX	UNIT
V_REF+	Positive built-in reference voltage output	REFVSEL = {2} for 2.5 V, REFON = REFOUT = 1 , I_VREF+ = 0 A		3 V		2.5	±1%	V
		REFVSEL = {1} for 2 V, REFON = REFOUT = 1, I_VREF+ = 0 A		3 V		2.0	±1%
		REFVSEL = {0} for 1.5 V, REFON = REFOUT = 1, I_VREF+ = 0 A		2.2 V, 3 V		1.5	±1%
AV_CC(min)	AVCC minimum voltage, Positive built-in reference active	REFVSEL = {0} for 1.5 V			2.2			V
		REFVSEL = {1} for 2 V			2.3
		REFVSEL = {2} for 2.5 V			2.8
I_REF+	Operating supply current into AVCC terminal ⁽²⁾ ⁽⁷⁾	ADC12SR = 1⁽⁸⁾, REFON = 1, REFOUT = 0, REFBURST = 0		3 V		70	100	µA
		ADC12SR = 1⁽⁸⁾, REFON = 1, REFOUT = 1, REFBURST = 0				0.45	0.75	mA
		ADC12SR = 0⁽⁸⁾, REFON = 1, REFOUT = 0, REFBURST = 0				210	310	µA
		ADC12SR = 0⁽⁸⁾, REFON = 1, REFOUT = 1, REFBURST = 0				0.95	1.7	mA
I_L(VREF+)	Load-current regulation, VREF+ terminal⁽³⁾	REFVSEL = {0, 1, 2}, I_VREF+ = +10 µA , –1000 µA, AV_CC = AV_CC(min) for each reference level, REFVSEL = {0, 1, 2}, REFON = REFOUT = 1				1500	2500	µV/mA
C_VREF+	Capacitance at VREF+ terminal	REFON = REFOUT = 1⁽⁶⁾, 0 mA ≤ I_VREF+ ≤ I_VREF+(max)		2.2 V, 3 V	20		100	pF
TC_REF+	Temperature coefficient of built-in reference⁽⁴⁾	I_VREF+ is a constant in the range of 0 mA ≤ I_VREF+ ≤ –1 mA	REFOUT = 0	2.2 V, 3 V		20		ppm/ °C
TC_REF+	Temperature coefficient of built-in reference⁽⁴⁾	I_VREF+ is a constant in the range of 0 mA ≤ I_VREF+ ≤ –1 mA	REFOUT = 1	2.2 V, 3 V		20	50	ppm/ °C
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 = 1, REFOUT = 0 or 1				120	300	µV/V
PSRR_AC	Power supply rejection ratio (AC)	AV_CC = AV_CC(min) to AV_CC(max), T_A = 25°C, REFVSEL = {0, 1, 2}, REFON = 1, REFOUT = 0 or 1				1		mV/V
t_SETTLE	Settling time of reference voltage⁽⁵⁾	AV_CC = AV_CC(min) to AV_CC(max), REFVSEL = {0, 1, 2}, REFOUT = 0, REFON = 0 → 1				75		µs
t_SETTLE	Settling time of reference voltage⁽⁵⁾	AV_CC = AV_CC(min) to AV_CC(max), C_VREF = C_VREF(max), REFVSEL = {0, 1, 2}, REFOUT = 1, REFON = 0 → 1				75		µs

(1) The reference is supplied to the ADC by the REF module and is buffered locally inside the ADC. The ADC uses two internal buffers, one smaller and one larger for driving the V_REF+ terminal. When REFOUT = 1, the reference is available at the V_REF+ terminal, as well as, used as the reference for the conversion and uses the larger buffer. When REFOUT = 0, the reference is only used as the reference for the conversion and uses the smaller buffer.

(2) The internal reference current is supplied by the AVCC terminal. Consumption is independent of the ADC12ON control bit, unless a conversion is active. REFOUT = 0 represents the current contribution of the smaller buffer. REFOUT = 1 represents the current contribution of the larger buffer without external load.

(3) Contribution only due to the reference and buffer including package. This does not include resistance due to PCB traces or other external factors.

(4) 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)).

(5) The condition is that the error in a conversion started after t_REFON is less than ±0.5 LSB. The settling time depends on the external capacitive load when REFOUT = 1.

(6) Connect two decoupling capacitors, 10 µF and 100 nF, to VREF to decouple the dynamic current required for an external reference source if it is used for the ADC12_A. Also see the MSP430F5xx and MSP430F6xx Family User's Guide.

(7) The temperature sensor is provided by the REF module. Its current is supplied by terminal AVCC and is equivalent to I_REF+ with REFON = 1 and REFOUT = 0.

(8) For devices without the ADC12, the parametric with ADC12SR = 0 are applicable.