AD4680 datasheet(3/29 Pages) AD

Part #	AD4680

Description	Differential Inputs, 1 MSPS/500 kSPS, Dual Simultaneous Sampling SAR ADCs

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3 / 29 page

Data Sheet

AD4680/AD4681

Rev. 0 | Page 3 of 29

SPECIFICATIONS

VCC = 3.0 V to 3.6 V, VLOGIC = 1.65 V to 3.6 V, reference voltage (VREF) = 2.5 V internal, sampling frequency (fSAMPLE) = 1 MSPS (AD4680)

or 500 kSPS (AD4681), TA = −40°C to +125°C, no oversampling enabled, unless otherwise noted. FS is full scale.

Table 2.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

RESOLUTION

16

Bits

THROUGHPUT

AD4680

1

MSPS

AD4681

500

kSPS

DC ACCURACY

No Missing Codes

16

Bits

Differential Nonlinearity (DNL) Error

−1.0

±0.7

+1.0

LSB

Integral Nonlinearity (INL) Error

−1.5

±0.7

+1.5

LSB

Gain Error

−0.015

±0.002

+0.015

% FS

Gain Error Temperature Drift

−11

±1

+11

ppm/°C

Gain Error Match

−0.01

±0.002

+0.01

% FS

Offset Error

At 25°C, VCC = 3.3 V

−0.2

±0.01

+0.2

mV

−0.5

+0.5

mV

Zero Error Drift

−2

±0.5

+2

μV/°C

Zero Error Matching

−0.5

±0.1

+0.5

mV

AC ACCURACY

Input frequency (fIN) = 1 kHz

Dynamic Range

VREF = 3.3 V external

93.3

dB

91.8

dB

Oversampled Dynamic Range

Oversampling ratio (OSR) = 4×

95.2

dB

Signal-to-Noise Ratio (SNR)

VREF = 3.3 V external

91

92.5

dB

89.5

91

dB

OSR = 8×, RES = 1, VREF = 3.3 V external

100

dB

fIN = 100 kHz

89

dB

Spurious-Free Dynamic Range (SFDR)

112

dB

Total Harmonic Distortion (THD)

−113

dB

fIN = 100 kHz

−104

dB

Signal-to-Noise-and-Distortion (SINAD) Ratio

VREF = 3.3 V external

90

92.5

dB

89

91

dB

Channel to Channel Isolation

−110

dB

ANALOG INPUT

Voltage Range

(AINx+) – (AINx−)

−VREF

+VREF

V

Absolute Input Voltage

AINx+, AINx−

−0.1

VREF + 0.1

V

Common-Mode Input Range

AINx+, AINx−

0.2 to VREF −

0.2

V

Analog Input Common-Mode Rejection

Ratio (CMRR)

fIN = 500 kHz

−75

dB

DC Leakage Current

0.1

1

μA

Input Capacitance

When in track mode

18

pF

When in hold mode

5

pF

SAMPLING DYNAMICS

Input Bandwidth

At −0.1 dB

6

MHz

At −3 dB

25

MHz

Aperture Delay

2

ns

Aperture Delay Match

26

100

ps

Aperture Jitter

20

ps

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