SAADC Electrical Specification

nRF54LM20A | nRF54LM20B Datasheet

Symbol Description Min. Typ. Max. Units
DNL10

Differential non-linearity, 10-bit resolution

1 <3 LSB11b
VOS

Differential offset error (calibrated), 10-bit resolution a

-5 0 5 LSB10b
fSAMPLE

Maximum sampling rate

2000 kHz
fBW,NS1

Input signal bandwidth for NOISESHAPE=NS1

40 kHz
fBW,NS2

Input signal bandwidth for NOISESHAPE=NS2

20 kHz
tACQ,2k

Acquisition time (configurable), source Resistance <= 2kOhm

0.25 µs
tACQ,10k

Acquisition time (configurable), source Resistance <= 10kOhm

0.5 µs
tACQ,20k

Acquisition time (configurable), source Resistance <= 20kOhm

1 µs
tACQ,40k

Acquisition time (configurable), source Resistance <= 40kOhm

2 µs
tACQ,100k

Acquisition time (configurable), source Resistance <= 100kOhm

5 µs
tACQ,200k

Acquisition time (configurable), source Resistance <= 200kOhm

10 µs
tACQ,400k

Acquisition time (configurable), source Resistance <= 400kOhm

20 µs
tACQ,800k

Acquisition time (configurable), source Resistance <= 800kOhm

40 µs
tCONV

Conversion time

0.5 µs
EG2/5

Errorb for Gain = 2/5

-1.2 1.2 %
EG1/2

Errorb for Gain = 1/2

-1.2 1.2 %
EG1

Errorb for Gain = 1

-1.2 1.2 %
EG2

Errorb for Gain = 2

-1.2 1.2 %
RINPUT

Input resistance for input frequencies in range 0-200 kHz

735
RINPUT

Input resistance for input frequencies in range 200 kHz - 1 MHz

157
ENOB

Effective number of bits, differential mode, 12-bit resolution, 1/1 gain, 250 ns acquisition time, HFXO, 2 Msps

9 Bit
SNDR

Peak signal to noise and distortion ratio, differential mode, 12-bit resolution, 1/1 gain, 250 ns acquisition time, HFXO, 2 Msps

56 dB
SFDR

Spurious free dynamic range, differential mode, 12-bit resolution, 1/1 gain, 250 ns acquisition time, HFXO, 2 Msps

60 dBc
a Digital output code at zero volt differential input.
b Does not include temperature drift