ZHCSER2 数据表 | 德州仪器 TI.com.cn

PRODUCTION DATA

8.24 Internal Reference, Low-Frequency Oscillator (REFO)

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

PARAMETER		TEST CONDITIONS	V_CC	MIN	TYP	MAX	UNIT
I_REFO	REFO oscillator current consumption	T_A = 25°C	1.8 V to 3.6 V		3		µA
f_REFO	REFO frequency calibrated	Measured at ACLK	1.8 V to 3.6 V		32768		Hz
	REFO absolute tolerance calibrated	Full temperature range	1.8 V to 3.6 V	–3.5%		3.5%
	REFO absolute tolerance calibrated	T_A = 25°C	3 V	–1.5%		1.5%
df_REFO/d_T	REFO frequency temperature drift	Measured at ACLK⁽¹⁾	1.8 V to 3.6 V		0.01		%/°C
df_REFO/dV_CC	REFO frequency supply voltage drift	Measured at ACLK⁽²⁾	1.8 V to 3.6 V		1.0		%/V
	Duty cycle	Measured at ACLK	1.8 V to 3.6 V	40%	50%	60%
t_START	REFO start-up time	40%/60% duty cycle	1.8 V to 3.6 V		25		µs

(1) 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))

(2) Calculated using the box method: (MAX(1.8 V to 3.6 V) – MIN(1.8 V to 3.6 V)) / MIN(1.8 V to 3.6 V) / (3.6 V – 1.8 V)