CC2640R2FYFVT.B datasheet(25/74 Pages) TI2

25 / 74 page

8.16 48-MHz RC Oscillator (RCOSC_HF)

Measured on the TI CC2650EM-5XD reference design with Tc = 25°C, VDDS = 3.0 V, unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Frequency

MHz

Uncalibrated frequency accuracy

±1%

Calibrated frequency accuracy(1)

±0.25%

Start-up time

µs

(1)

Accuracy relative to the calibration source (XOSC_HF).

8.17 32-kHz RC Oscillator (RCOSC_LF)

Measured on the TI CC2650EM-5XD reference design with Tc = 25°C, VDDS = 3.0 V, unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Calibrated frequency(1)

32.8

kHz

Temperature coefficient

ppm/°C

(1)

The frequency accuracy of the Real Time Clock (RTC) is not directly dependent on the frequency accuracy of the 32-kHz RC

Oscillator. The RTC can be calibrated to an accuracy within ±500 ppm of 32.768 kHz by measuring the frequency error of RCOSC_LF

relative to XOSC_HF and compensating the RTC tick speed. The procedure is explained in Running Bluetooth® Low Energy on

CC2640 Without 32 kHz Crystal.

8.18 ADC Characteristics

Tc = 25°C, VDDS = 3.0 V and voltage scaling enabled, unless otherwise noted.(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input voltage range

VDDS

Resolution

Bits

Sample rate

200

ksps

Offset

Internal 4.3-V equivalent reference(2)

LSB

Gain error

Internal 4.3-V equivalent reference(2)

2.4

LSB

DNL(3)

Differential nonlinearity

>–1

LSB

INL(4)

Integral nonlinearity

±3

LSB

ENOB

Effective number of bits

Internal 4.3-V equivalent reference(2), 200 ksps,

9.6-kHz input tone

9.8

Bits

VDDS as reference, 200 ksps, 9.6-kHz input tone

Internal 1.44-V reference, voltage scaling disabled,

32 samples average, 200 ksps, 300-Hz input tone

11.1

THD

Total harmonic distortion

Internal 4.3-V equivalent reference(2), 200 ksps,

9.6-kHz input tone

–65

VDDS as reference, 200 ksps, 9.6-kHz input tone

–69

Internal 1.44-V reference, voltage scaling disabled,

32 samples average, 200 ksps, 300-Hz input tone

–71

SINAD,

SNDR

Signal-to-noise

and

Distortion ratio

Internal 4.3-V equivalent reference(2), 200 ksps,

9.6-kHz input tone

VDDS as reference, 200 ksps, 9.6-kHz input tone

Internal 1.44-V reference, voltage scaling disabled,

32 samples average, 200 ksps, 300-Hz input tone

SFDR

Spurious-free dynamic

range

Internal 4.3-V equivalent reference(2), 200 ksps,

9.6-kHz input tone

VDDS as reference, 200 ksps, 9.6-kHz input tone

Internal 1.44-V reference, voltage scaling disabled,

32 samples average, 200 ksps, 300-Hz input tone

www.ti.com

CC2640R2F

SWRS204C – DECEMBER 2016 – REVISED SEPTEMBER 2020

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