ZHCSER2D 数据表 | 德州仪器 TI.com.cn

ZHCSER2D May 2013 – October 2020 MSP430F5252 , MSP430F5253 , MSP430F5254 , MSP430F5255 , MSP430F5256 , MSP430F5257 , MSP430F5258 , MSP430F5259

PRODUCTION DATA

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机械数据 (封装 | 引脚)

RGC|64
- MPQF125F

散热焊盘机械数据 (封装 | 引脚)

RGC|64
- QFND102O

订购信息

8.45 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	REFVSEL = {2} for 2.5 V REFON = 1	3 V	2.445	2.486	2.527	V
		REFVSEL = {1} for 2.0 V REFON = 1	3 V	1.94	1.97	2.01
		REFVSEL = {0} for 1.5 V REFON = 1	2.2 V, 3 V	1.461	1.485	1.511
AV_CC(min)	AVCC minimum voltage, Positive built-in reference active	REFVSEL = {0} for 1.5 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⁾	f_ADC10CLK = 5.0 MHz REFON = 1, REFBURST = 0, REFVSEL = {2} for 2.5 V	3 V		18	24	µA
		f_ADC10CLK = 5.0 MHz REFON = 1, REFBURST = 0, REFVSEL = {1} for 2.0 V	3 V		15.5	21	µA
		f_ADC10CLK = 5.0 MHz REFON = 1, REFBURST = 0, REFVSEL = {0} for 1.5 V	3 V		13.5	21	µA
TC_REF+	Temperature coefficient of built-in reference⁽²⁾	I_VREF+ = 0 A REFVSEL = {0, 1, 2}, REFON = 1			30	50	ppm/ °C
I_SENSOR	Operating supply current into AVCC terminal⁽⁴⁾	REFON = 0, INCH = 0Ah, ADC10ON = N/A, T_A = 30°C	2.2 V		20	22	µA
I_SENSOR	Operating supply current into AVCC terminal⁽⁴⁾	REFON = 0, INCH = 0Ah, ADC10ON = N/A, T_A = 30°C	3 V		20	22	µA
V_SENSOR	See ⁽⁵⁾	ADC10ON = 1, INCH = 0Ah, T_A = 30°C	2.2 V		770		mV
V_SENSOR	See ⁽⁵⁾	ADC10ON = 1, INCH = 0Ah, T_A = 30°C	3 V		770		mV
V_MID	AVCC divider at channel 11	ADC10ON = 1, INCH = 0Bh, V_MID ≈ 0.5 × V_AVCC	2.2 V	1.06	1.1	1.14	V
V_MID	AVCC divider at channel 11	ADC10ON = 1, INCH = 0Bh, V_MID ≈ 0.5 × V_AVCC	3 V	1.46	1.5	1.54	V
t_{SENSOR(sample)}	Sample time required if channel 10 is selected⁽⁶⁾	ADC10ON = 1, INCH = 0Ah, Error of conversion result ≤ 1 LSB		30			µs
t_VMID(sample)	Sample time required if channel 11 is selected⁽⁷⁾	ADC10ON = 1, INCH = 0Bh, Error of conversion result ≤ 1 LSB		1			µs
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			120		µV/V
PSRR_AC	Power supply rejection ratio (AC)	AV_CC = AV_CC(min) to AV_CC(max), T_A = 25°C, f = 1 kHz, ΔVpp = 100 mV, REFVSEL = {0, 1, 2}, REFON = 1			6.4		mV/V
t_SETTLE	Settling time of reference voltage⁽³⁾	AV_CC = AV_CC(min) to AV_CC(max), REFVSEL = {0, 1, 2}, REFON = 0 → 1			75		µs

(1) The internal reference current is supplied from terminal AVCC. Consumption is independent of the ADC10ON control bit, unless a conversion is active. The REFON bit enables to settle the built-in reference before starting an A/D conversion.

(2) 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)).

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

(4) The sensor current I_SENSOR is consumed if (ADC10ON = 1 and REFON = 1) or (ADC10ON = 1 and INCH = 0Ah and sample signal is high). When REFON = 1, I_SENSOR is already included in I_REF+.

(5) The temperature sensor offset can be significant. TI recommends a single-point calibration to minimize the offset error of the built-in temperature sensor.

(6) The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time t_SENSOR(on).

(7) The on-time t_VMID(on) is included in the sampling time t_VMID(sample); no additional on time is needed.