CYBLE-022001-00
Document Number: 001-95662 Rev. *N
Page 19 of 41
CSD
Table 19. SAR ADC AC Specifications
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
A_PSRR
Power-supply rejection ratio
70
–
–
dB
Measured at 1-V
reference
A_CMRR
Common-mode rejection ratio
66
–
–
–
A_SAMP
Sample rate
–
–
1
Msps
806 Ksps for More Part
Numbers devices
Fsarintref
SAR operating speed without external ref.
bypass
–
–
100
Ksps
12-bit resolution
A_SNR
Signal-to-noise ratio (SNR)
65
–
–
dB
F
IN
= 10 kHz
A_BW
Input bandwidth without aliasing
–
–
A_SAMP/2
kHz
–
A_INL
Integral nonlinearity. V
DD
= 1.71 V to 5.5 V,
1 Msps
–1.7
–
2
LSB
V
REF
= 1 V to V
DD
A_INL
Integral nonlinearity. V
DDD
= 1.71 V to 3.6 V,
1 Msps
–1.5
–
1.7
V
REF
= 1.71 V to V
DD
A_INL
Integral nonlinearity. V
DD
= 1.71 V to 5.5 V,
500 Ksps
–1.5
–
1.7
V
REF
= 1 V to V
DD
A_dnl
Differential nonlinearity. V
DD
= 1.71 V to
5.5 V, 1 Msps
–1
–
2.2
V
REF
= 1 V to V
DD
A_DNL
Differential nonlinearity. V
DD
= 1.71 V to
3.6 V, 1 Msps
–1
–
2
V
REF
= 1.71 V to V
DD
A_DNL
Differential nonlinearity. V
DD
= 1.71 V to
5.5 V, 500 Ksps
–1
–
2.2
V
REF
= 1 V to V
DD
A_THD
Total harmonic distortion
–
–
–65
dB
F
IN
= 10 kHz
CSD Block Specifications
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
V
CSD
Voltage range of operation
1.71
–
5.5
V
–
IDAC1
DNL for 8-bit resolution
–1
–
1
LSB
–
IDAC1
INL for 8-bit resolution
–3
–
3
–
IDAC2
DNL for 7-bit resolution
–1
–
1
–
IDAC2
INL for 7-bit resolution
–3
–
3
–
SNR
Ratio of counts of finger to noise
5
–
–
Ratio
Capacitance range of
9 pF to 35 pF, 0.1-pF
sensitivity. Radio is not
operating during the
scan
I
DAC1_CRT1
Output current of IDAC1 (8 bits) in High
range
–
612
–
µA
–
I
DAC1_CRT2
Output current of IDAC1 (8 bits) in Low
range
–
306
–
–
I
DAC2_CRT1
Output current of IDAC2 (7 bits) in High
range
–
305
–
–
I
DAC2_CRT2
Output current of IDAC2 (7 bits) in Low
range
–
153
–
–