AD7797BRUZ-REEL datasheet(4/24 Pages) AD

Numer części	AD7797BRUZ-REEL

Szczegółowy opis	Sigma-Delta ADC for Bridge Sensors Low Power

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Producent	AD [Analog Devices]

Strona internetowa	http://www.analog.com

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4 / 24 page

AD7796/AD7797

Data Sheet

Rev. B | Page 4 of 24

Parameter

AD7796B/AD7797B1

Unit

Test Conditions/Comments

INTERNAL/EXTERNAL CLOCK

Internal Clock

Frequency2

64 ± 3%

kHz min/max

Duty Cycle

50:50

% typ

External Clock

Frequency

64

kHz nom

A 128 kHz clock can be used if the divide by 2

function is used (Bit CLK1 = CLK0 = 1)

Duty Cycle

45:55 to 55:45

% typ

Applies for external 64 kHz clock (a 128 kHz

clock can have a less stringent duty cycle)

LOGIC INPUTS

CS2

Input Low Voltage, VINL

0.8

V max

DVDD = 5 V

0.4

V max

DVDD = 3 V

Input High Voltage, VINH

2.0

V min

DVDD = 3 V or 5 V

SCLK, CLK, and

DIN (Schmitt-Triggered Input)2

VT(+)

1.4/2

V min/V max

DVDD = 5 V

VT(–)

0.8/1.7

V min/V max

DVDD = 5 V

VT(+) − VT(–)

0.1/0.17

V min/V max

DVDD = 5 V

VT(+)

0.9/2

V min/V max

DVDD = 3 V

VT(–)

0.4/1.35

V min/V max

DVDD = 3 V

VT(+)

− VT(–)

0.06/0.13

V min/V max

DVDD = 3 V

Input Currents

±10

µA max

VIN = DVDD or GND

Input Capacitance

10

pF typ

All digital inputs

LOGIC OUTPUTS (INCLUDING CLK)

Output High Voltage, VOH2

DVDD − 0.6

V min

DVDD = 3 V, ISOURCE = 100 µA

4

V min

DVDD = 5 V, ISOURCE = 200 µA

Output Low Voltage, VOL2

0.4

V max

DVDD = 3 V, ISINK = 100 µA

0.4

V max

DVDD = 5 V, ISINK = 1.6 mA (DOUT/RDY)/800 µA (CLK)

Floating-State Leakage Current

±10

µA max

Floating-State Output Capacitance

10

pF typ

Data Output Coding

Offset Binary

SYSTEM CALIBRATION2

Full-Scale Calibration Limit

+1.05 × FS

V max

Zero-Scale Calibration Limit

−1.05 × FS

V min

Input Span

0.8 × FS

V min

2.1 × FS

V max

POWER REQUIREMENTS7

Power Supply Voltage

AVDD – GND

2.7/5.25

V min/max

DVDD – GND

2.7/5.25

V min/max

Power Supply Currents

IDD Current

325

µA max

250 µA typ at AVDD = 3 V, 280 µA typ at AVDD = 5 V

IDD (Power-Down Mode)

1

µA max

1

Temperature range is –40°C to +85°C.

2

Specification is not production tested, but is supported by characterization data at initial product release.

3

Following a calibration, this error is in the order of the noise for the update rate selected.

4

Recalibration at any temperature removes these errors.

5

Full-scale error applies to both positive and negative full-scale and applies at the factory calibration conditions (AVDD = 4 V, TA = 25°C).

6

FS[3:0] are the four bits used in the mode register to select the output word rate.

7

Digital inputs equal to DVDD or GND.

Podobny numer części - AD7797BRUZ-REEL

Producent	Numer części	Arkusz danych	Szczegółowy opis
Analog Devices	AD7797BRUZ-REEL	552Kb / 24P	Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors REV. A

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Podobny opis - AD7797BRUZ-REEL

Producent	Numer części	Arkusz danych	Szczegółowy opis
Analog Devices	AD7191	330Kb / 21P	Sigma-Delta ADC for Bridge Sensors
	AD7796	552Kb / 24P	Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors REV. A
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