SLAS998 Data sheet

SLAS998A June 2014 – October 2018 MSP430F67621 , MSP430F67641

PRODUCTION DATA.

Package Options

Mechanical Data (Package|Pins)

PN|80
- MTQF010B
PZ|100
- MTQF013A

Thermal pad, mechanical data (Package|Pins)

Orderable Information

Table 5-48 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	REFVSEL = {2} for 2.5 V, REFON = 1	3 V	2.47	2.51	2.55	V
		REFVSEL = {1} for 2.0 V, REFON = 1	3 V	1.95	1.99	2.03
		REFVSEL = {0} for 1.5 V, REFON = 1	2.2 V, 3 V	1.46	1.50	1.54
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 MHz, REFON = 1, REFBURST = 0, REFVSEL = {2} for 2.5 V	3 V		23	30	µA
		f_ADC10CLK = 5 MHz, REFON = 1, REFBURST = 0, REFVSEL = {1} for 2.0 V	3 V		21	27
		f_ADC10CLK = 5 MHz, REFON = 1, REFBURST = 0, REFVSEL = {0} for 1.5 V	3 V		19	25
TC_REF+	Temperature coefficient of built-in reference⁽²⁾	REFVSEL = {0, 1, 2}, REFON = 1			10	50	ppm/ °C
I_SENSOR	Operating supply current into AVCC terminal	REFON = 1, ADC10ON = 1, INCH = 0Ah, T_A = 30°C	2.2 V		145	220	µA
I_SENSOR	Operating supply current into AVCC terminal	REFON = 1, ADC10ON = 1, INCH = 0Ah, T_A = 30°C	3 V		170	245	µA
V_SENSOR	See ⁽⁴⁾	REFON = 1, ADC10ON = 1, INCH = 0Ah, T_A = 30°C	2.2 V		780		mV
V_SENSOR	See ⁽⁴⁾	REFON = 1, ADC10ON = 1, INCH = 0Ah, T_A = 30°C	3 V		780		mV
V_MID	AV_CC divider at channel 11	ADC10ON = 1, INCH = 0Bh, V_MID is ~0.5 × V_AVCC	2.2 V	1.08	1.1	1.12	V
V_MID	AV_CC divider at channel 11	ADC10ON = 1, INCH = 0Bh, V_MID is ~0.5 × V_AVCC	3 V	1.48	1.5	1.52	V
t_{SENSOR(sample)}	Sample time required if channel 10 is selected⁽⁵⁾	REFON = 1, ADC10ON = 1, INCH = 0Ah, Error of conversion result ≤ 1 LSB		30			µs
t_VMID(sample)	Sample time required if channel 11 is selected⁽⁶⁾	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	300	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			1		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
V_SD24REF	SD24_B internal reference voltage	SD24REFS = 1	3 V	1.137	1.151	1.165	V
t_ON	SD24_B internal reference turnon time⁽⁷⁾	SD24REFS = 0→1, C_REF = 100 nF	3 V		200		µs

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

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

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

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

(7) The condition is that SD24_B conversion started after t_ON should guarantee specified SINAD values for the selected Gain, OSR and f_SD24.