ADC121S705

SNAS355B – DECEMBER 2006 – REVISED MARCH 2013

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ADC121S705 Converter Electrical Characteristics

(1)

The following specifications apply for VA = +4.5V to 5.5V, VREF = 2.5V, fSCLK = 8 to 16 MHz, fIN = 100 kHz, CL = 25 pF, unless

otherwise noted. Boldface limits apply for TA = TMIN to TMAX; all other limits are at TA = 25°C.

Symbol

Parameter

Conditions

Typical

Limits

Units(2)

STATIC CONVERTER CHARACTERISTICS

Resolution with No Missing Codes

12

Bits

INL

Integral Non-Linearity

±0.6

±0.95

LSB (max)

DNL

Differential Non-Linearity

±0.4

±0.95

LSB (max)

OE

Offset Error

−0.4

±3

LSB (max)

Positive Full-Scale Error

+0.1

±2

LSB (max)

FSE

Negative Full-Scale Error

-1.0

±6

LSB (max)

GE

Gain Error

+1.0

±6.5

LSB (max)

DYNAMIC CONVERTER CHARACTERISTICS

SINAD

Signal-to-Noise Plus Distortion Ratio

fIN = 100 kHz, −0.1 dBFS

72.2

69.5

dBc (min)

SNR

Signal-to-Noise Ratio

fIN = 100 kHz, −0.1 dBFS

72.8

71

dBc (min)

THD

Total Harmonic Distortion

fIN = 100 kHz, −0.1 dBFS

−81.6

−72

dBc (max)

SFDR

Spurious-Free Dynamic Range

fIN = 100 kHz, −0.1 dBFS

83.9

72

dBc (min)

ENOB

Effective Number of Bits

fIN = 100 kHz, −0.1 dBFS

11.7

11.25

bits (min)

Differential Input

26

MHz

Output at 70.7%FS

FPBW

−3 dB Full Power Bandwidth

with FS Input

Single-Ended Input

22

MHz

ANALOG INPUT CHARACTERISTICS

−VREF

V (min)

VIN

Differential Input Range

+VREF

V (max)

IDCL

DC Leakage Current

VIN = VREF or VIN = -VREF

±1

µA (max)

In Track Mode

17

pF

CINA

Input Capacitance

In Hold Mode

3

pF

See Specification Definitions for the test

CMRR

Common Mode Rejection Ratio

76

dB

condition

1.0

V (min)

VREF

Reference Voltage Range

VA

V (max)

CS low, fSCLK = 16 MHz,

55

µA

fS = 1 MSPS, output = FF8h

IREF

Reference Current

CS low, fSCLK = 8 MHz,

28

µA

fS = 500 kSPS, output = FF8h

CS high, fSCLK = 0

0.2

µA

DIGITAL INPUT CHARACTERISTICS

VIH

Input High Voltage

2.6

3.6

V (min)

VIL

Input Low Voltage

2.5

1.5

V (max)

IIN

Input Current

VIN = 0V or VA

±1

µA (max)

CIND

Input Capacitance

2

4

pF (max)

DIGITAL OUTPUT CHARACTERISTICS

ISOURCE = 200 µA

VA − 0.12

VA − 0.2

V (min)

VOH

Output High Voltage

ISOURCE = 1 mA

VA − 0.16

V

ISINK = 200 µA

0.01

0.4

V (max)

VOL

Output Low Voltage

ISINK = 1 mA

0.05

V

IOZH, IOZL TRI-STATE Leakage Current

Force 0V or VA

±1

µA (max)

COUT

TRI-STATE Output Capacitance

Force 0V or VA

2

4

pF (max)

Output Coding

Binary 2'S Complement

(1)

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

(2)

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

4

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