3

Electrical characteristics

+25 °C, min./max. values at -40 °C and 125 °C, unless otherwise specified.

Symbol

Parameters

Test conditions

Min.

Typ.

Max.

Unit

Static characteristics

Resolution with no missing

codes

12

Bits

INL

Integral non-linearity (end

point method)

−1.1

±0.4

1.1

LSB

DNL

Differential non-linearity

-0.9

±0.4

0.9

LSB

VOFF

Offset error

−2.3

0.8

2.3

LSB

OEM

Offset error match

0.8

LSB

FSE

Full scale error

−2.3

0.8

2.3

LSB

FSEM

Full scale error match

0.8

LSB

Dynamic characteristics

ENOB

Effective number of bits

FIN = 40.2 kHz, −0.02 dBFS

11.1

11.7

Bits

SINAD

Signal-to-noise plus

distortion ratio (0 to Fs/2)

FIN = 40.2 kHz, −0.02 dBFS

68.9

72

dB

SNR

Signal-to-noise ratio (0 to

Fs/2)

FIN = 40.2 kHz, −0.02 dBFS

71

73

dB

THD

Total harmonic distortion

FIN = 40.2 kHz, −0.02 dBFS

−80

−73

dB

SFDR

Spurious-free dynamic

range (0 to Fs/2)

FIN = 40.2 kHz, −0.02 dBFS

74

81

dB

ISO

Channel-to-channel

isolation

FIN = 20 kHz, −0.02 dBFS

84

dB

IM2

fa = 19.5 kHz, fb = 20.5 kHz

VINA = VINB = -6.02 dBFS

−90

dB

IM3

fa = 19.5 kHz, fb = 20.5 kHz

VINA = VINB = -6.02 dBFS

−90

dB

Analog input characteristics

IDCL

-1

+1

µA

CINA

Input capacitance

Track mode

45

pF

Hold mode

4.5

Digital input characteristics

VIH

Input high voltage

AVCC = DVCC = +2.7 V to +3.6 V

2.1

V

VIL

Input low voltage

AVCC = DVCC = +2.7 V to +3.6 V

0.8

V

IIN

Digital input current

VIN = 0V or DVCC

-1

+1

µA

CIND

Digital input capacitance

4.5

pF

Digital output characteristics (output coding: straight (natural) binary)

VOH

Output high voltage

AVCC = DVCC = +2.7 V to +3.6 V

2.8

V

VOL

Output low voltage

Isink = 200 µA to 1.0 mA,

0.4

V

LEOAD128

Electrical characteristics

DS13668 - Rev 2

page 5/20