ADC121S051

SNAS302I – JULY 2005 – REVISED JANUARY 2014

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ADC121S051 Converter Electrical Characteristics

(1) (2)

The following specifications apply for VA = +2.7V to 5.25V, fSCLK = 4 MHz to 10 MHz, fSAMPLE = 200 ksps to 500 ksps, CL = 15

pF, unless otherwise noted. Boldface limits apply for TA = TMIN to TMAX: all other limits TA = 25°C.

Limits

Symbol

Parameter

Conditions

Typical

Units

(2)

STATIC CONVERTER CHARACTERISTICS

Resolution with No Missing Codes

12

Bits

+0.45

LSB (max)

VA = +2.7V to +3.6V

±1.0

−0.40

LSB (min)

INL

Integral Non-Linearity

+0.75

LSB (max)

VA = +4.75 to +5.25V

−0.45

LSB (min)

+0.50

+1.0

LSB (max)

VA = +2.7V to +3.6V

−0.25

−0.9

LSB (min)

DNL

Differential Non-Linearity

+0.80

LSB (max)

VA = +4.75 to +5.25V

−0.50

LSB (min)

VA = +2.7V to +3.6V

−0.18

±1.2

VOFF

Offset Error

LSB (max)

VA = +4.75 to +5.25V

+1.9

VA = +2.7V to +3.6V

−0.62

±1.5

GE

Gain Error

LSB (max)

VA = +4.75 to +5.25V

−1.50

DYNAMIC CONVERTER CHARACTERISTICS

VA = +2.7V to 5.25V

SINAD

Signal-to-Noise Plus Distortion Ratio

72

70

dB (min)

fIN = 100 kHz, −0.02 dBFS

VA = +2.7V to 5.25V

SNR

Signal-to-Noise Ratio

72

70.8

dB (min)

fIN = 100 kHz, −0.02 dBFS

VA = +2.7V to 5.25V

THD

Total Harmonic Distortion

−83

dB

fIN = 100 kHz, −0.02 dBFS

VA = +2.7V to 5.25V

SFDR

Spurious-Free Dynamic Range

84

dB

fIN = 100 kHz, −0.02 dBFS

VA = +2.7V to 5.25V

ENOB

Effective Number of Bits

11.7

11.3

Bits (min)

fIN = 100 kHz, −0.02 dBFS

Intermodulation Distortion, Second

VA = +5.25V

−83

dB

Order Terms

fa = 103.5 kHz, fb = 113.5 kHz

IMD

Intermodulation Distortion, Third Order

VA = +5.25V

−82

dB

Terms

fa = 103.5 kHz, fb = 113.5 kHz

VA = +5V

11

MHz

FPBW

-3 dB Full Power Bandwidth

VA = +3V

8

MHz

ANALOG INPUT CHARACTERISTICS

VIN

Input Range

0 to VA

V

IDCL

DC Leakage Current

±1

µA (max)

Track Mode

30

pF

CINA

Input Capacitance

Hold Mode

4

pF

DIGITAL INPUT CHARACTERISTICS

VA = +5.25V

2.4

V (min)

VIH

Input High Voltage

VA = +3.6V

2.1

V (min)

VA = +5V

0.8

V (max)

VIL

Input Low Voltage

VA = +3V

0.4

V (max)

IIN

Input Current

VIN = 0V or VA

±0.1

±1

µA (max)

CIND

Digital Input Capacitance

2

4

pF (max)

(1)

Tested limits are specified to National's AOQL (Average Outgoing Quality Level).

(2)

Data sheet min/max specification limits are ensured by design, test, or statistical analysis.

4

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