CYBLE-224116-01
Document Number: 002-12524 Rev. *D
Page 25 of 47
CSD
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
= 2.0 V to 3.6 V, 1
Msps
–1.7
– 2
LSB
V
REF
= 1 V to V
DD
A_INL
Integral nonlinearity. V
DD
= 2.0 V to 3.6 V, 1
Msps
–1.5
– 1.7
LSB
V
REF
= 1.71 V to V
DD
A_INL
Integral nonlinearity. V
DD
= 2.0 V to 3.6 V,
500 ksps
–1.5
–
1.7
LSB
V
REF
= 1 V to V
DD
A_dnl
Differential nonlinearity. V
DD
= 2.0 V to
3.6 V, 1 Msps
–1
–
2.2
LSB
V
REF
= 1 V to V
DD
A_DNL
Differential nonlinearity. V
DD
= 2.0 V to
3.6 V, 1 Msps
–1
– 2
LSB
V
REF
= 1.71 V to V
DD
A_DNL
Differential nonlinearity. V
DD
= 2.0 V to
3.6 V, 500 ksps
–1
– 2.2
LSB
V
REF
= 1 V to V
DD
A_THD
Total harmonic distortion
–
–
–65
dB
F
IN
= 10 kHz
Table 26. SAR ADC AC Specifications
(continued)
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
CSD Block Specifications
Parameter
Description
Min
Typ
Max
Units
Details/
Conditions
V
CSD
Voltage range of operation
2.0
–
3.6
V
IDAC1
DNL for 8-bit resolution
–1
–
1
LSB
IDAC1
INL for 8-bit resolution
–3
–
3
LSB
IDAC2
DNL for 7-bit resolution
–1
–
1
LSB
IDAC2
INL for 7-bit resolution
–3
–
3
LSB
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
–
µA
I
DAC2_CRT1
Output current of IDAC2 (7 bits) in High
range
–
305
–
µA
I
DAC2_CRT2
Output current of IDAC2 (7 bits) in Low
range
–
153
–
µA
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