ADS7066 datasheet(7/48 Pages) TI

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6.5 Electrical Characteristics

at AVDD = 3 V to 5.5 V, DVDD = 1.65 V to 5.5 V, VREF = 2.5 V (internal), and maximum throughput (unless otherwise noted);

minimum and maximum values at TA = -40°C to +125°C; typical values at TA = 25°C.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUTS

CIN

Input capacitance

ADC and MUX capacitance

DC PERFORMANCE

Resolution

No missing codes

Bits

DNL

Differential nonlinearity

–0.75

±0.4

0.75

LSB

INL

Integral nonlinearity

–4

±1

LSB

V(OS)

Input offset error

Post offset calibration, OSR[2:0] = 7

–7

±0.5

LSB

dVOS/dT Input offset thermal drift

Post offset calibration, OSR[2:0] = 7

±0.6

ppm/°C

Offset error match

OSR[2:0] = 7

–2.75

0.5

2.75

LSB

Gain error(1)

External VREF = 2.5 V, OSR[2:0] = 7

–0.05

±0.01

0.05

%FSR

dGE/dT

Gain error thermal drift

External VREF = 2.5 V, OSR[2:0] = 7

±0.5

ppm/°C

Gain error match

OSR[2:0] = 7

–0.005

±0.001

0.005

%FSR

AC PERFORMANCE

SINAD

Signal-to-noise + distortion ratio

fIN = 2 kHz, VREF = 2.5V (internal)

84.3

86.5

fIN = 2 kHz, VREF = 5 V, AVDD = 5 V

88.75

SNR

Signal-to-noise ratio

fIN = 2 kHz, VREF = 2.5V (internal)

84.5

86.8

fIN = 2 kHz, VREF = 5 V, AVDD = 5 V

91.9

THD

Total harmonic distortion

fIN = 2 kHz

–100

SFDR

Spurious-free dynamic range

fIN = 2 kHz

101

Isolation crosstalk

fIN = 10 kHz

–110

REFERENCE

VREF

Internal reference output

voltage(3)

at TA= 25

℃

2.497

2.5

2.503

dVREF/dT

Internal reference voltage

temperature drift

19 ppm/°C

CREF

Decoupling capacitor at REF pin

µF

DIGITAL INPUTS

VIL

Input low logic level

For CS, SCLK and SDI pins

–0.3

0.3 DVDD

For GPIOX (2) pins

–0.3

0.3 AVDD

VIH

Input high logic level

For CS, SCLK and SDI pins

0.7 DVDD

DVDD

For GPIOX pins

0.7 AVDD

AVDD

DIGITAL OUTPUTS

VOL

Output low logic level

For SDO pin, IOL = 500 µA sink

0.2 DVDD

For GPIOX (2) pins, IOL = 500 µA sink

0.2 AVDD

VOH

Output high logic level

For SDO pin, IOH = 500 µA source

0.8 DVDD

DVDD

For GPIOX (2) pins, IOH = 500 µA source

0.8 AVDD

AVDD

POWER SUPPLY

IAVDD

Analog supply current

AVDD = 3.3 V, external reference

0.7

0.91

AVDD = 3.3 V, internal reference

1.2

1.56

No conversion, external reference

250

µA

No conversion, internal reference

800

µA

(1)

These specifications include full temperature range variation but not the error contribution from internal reference.

(2)

GPIOX refers to GPIO0, GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6, and GPIO7 pins.

(3)

Does not include the variation in voltage resulting from solder shift effects.

www.ti.com

ADS7066

SBAS928B – FEBRUARY 2020 – REVISED MAY 2023

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