53
SLAS826F – MARCH 2015 – REVISED MARCH 2017
Product Folder Links:
Specifications
Copyright © 2015–2017, Texas Instruments Incorporated
lists the characteristics of the internal very-low-power low-frequency oscillator (VLO).
(1)
Current measured on DVCC supply
(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)
Calculated using the box method: (MAX(1.62 V to 3.7 V) – MIN(1.62 V to 3.7 V)) / MIN(1.62 V to 3.7 V) / (3.7 V – 1.62 V)
Table 5-13. Internal Very-Low-Power Low-Frequency Oscillator (VLO)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
I
VLO
Current consumption
(1)
50
nA
f
VLO
VLO frequency
6
9.4
14
kHz
df
VLO
/d
T
VLO frequency temperature drift
(2)
0.1
%/°C
df
VLO
/dV
CC
VLO frequency supply voltage drift
(3)
0.2
%/V
DC
VLO
Duty cycle
40%
50%
60%
lists the characteristics of the internal-reference low-frequency oscillator (REFO) in 32.768
‑
kHz
mode.
(1)
REFO is configured to 32.768-kHz mode with REFOFSEL = 0.
(2)
Total current measured on both AVCC and DVCC supplies.
(3)
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))
(4)
Calculated using the box method: (MAX(1.62 V to 3.7 V) – MIN(1.62 V to 3.7 V)) / MIN(1.62 V to 3.7 V) / (3.7 V – 1.62 V)
Table 5-14. Internal-Reference Low-Frequency Oscillator (REFO) in 32.768-kHz Mode
(1)
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 current consumption
(2)
0.6
µA
f
REFO
REFO frequency calibrated
32.768
kHz
REFO absolute tolerance calibrated
T
A
= –40°C to 85°C
±3%
T
A
= 25°C
3 V
±1.5%
df
REFO
/d
T
REFO frequency temperature drift
(3)
0.012
%/°C
df
REFO
/dV
CC
REFO frequency supply voltage drift
(4)
0.2
%/V
DC
REFO
REFO duty cycle
40%
50%
60%
lists the characteristics of the internal-reference low-frequency oscillator (REFO) in 128
‑
kHz
mode.
(1)
REFO is configured to 128-kHz mode with REFOFSEL = 1.
(2)
Total current measured on both AVCC and DVCC supplies.
(3)
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))
(4)
Calculated using the box method: (MAX(1.62 V to 3.7 V) – MIN(1.62 V to 3.7 V)) / MIN(1.62 V to 3.7 V) / (3.7 V – 1.62 V)
Table 5-15. Internal-Reference Low-Frequency Oscillator (REFO) in 128-kHz Mode
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
REFO
REFO current consumption
(2)
1
µA
f
REFO
REFO frequency calibrated
128
kHz
REFO absolute tolerance calibrated
T
A
= –40°C to 85°C
±6%
T
A
= 25°C
3 V
±1.5%
df
REFO
/d
T
REFO frequency temperature drift
(3)
0.018
%/°C
df
REFO
/dV
CC
REFO frequency supply voltage drift
(4)
0.4
%/V
DC
REFO
REFO duty cycle
40%
50%
60%