AD7719_15 datasheet(6/40 Pages) AD

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AD7719 Fiches technique(PDF) 6 Page - Analog Devices

No de pièce	AD7719

Description	Low Voltage, Low Power

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Fabricant	AD [Analog Devices]

Site Internet	http://www.analog.com

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REV. A

AD7719

–6–

Parameter

AD7719B

Unit

Test Conditions

Power Supply Currents (Continued)

AIDD Current (Main ADC)

1.1

mA max

AVDD = 3 V or 5 V, Buffered Mode,

0.85 mA typ

0.55

mA max

AVDD = 3 V or 5 V, Unbuffered Mode,

0.45 mA typ

AIDD Current (Aux ADC)

0.3

mA max

AVDD = 3 V or 5 V, 0.25 mA typ

AIDD Current (Main and Aux ADC)

1.25

mA max

AVDD = 3 V or 5 V, Main ADC Buffered,

1 mA typ

DIDD (ADC Disable Mode)

0.35

mA max

DVDD = 3 V, 0.25 mA typ

0.4

mA max

DVDD = 5 V, 0.3 mA typ

AIDD (ADC Disable Mode)

0.15

mA max

AVDD = 3 V or 5 V

DIDD (Power-Down Mode)

µA max

DVDD = 3 V, 32.768 kHz Osc. Running

µA max

DVDD = 3 V, Oscillator Powered Down

µA max

DVDD = 5 V, 32.768 kHz Osc. Running

µA max

DVDD = 5 V, Oscillator Powered Down

AIDD (Power-Down Mode)

µA max

AVDD = 3 V or 5 V

NOTES

1Temperature range –40°C to +85°C.

2Guaranteed by design and/or characterization data on production release.

3System zero calibration will remove this error.

4A calibration at any temperature will remove this drift error.

5The main ADC is factory-calibrated with AV

DD = DVDD = 4 V, TA = 25°C, REFIN1(+) – REFIN1(–) = 2.5 V. If the user power supplies or temperature conditions

are significantly different from these, internal full-scale calibration will restore this error to the published specification. System calibration can be used to reduce this

error to the order of the noise. Full-scale error applies to both positive and negative full scale.

6A system full-scale calibration will remove this error.

7A typical gain error of ±10 µV results following a user self-calibration.

8Simultaneous 50 Hz and 60 Hz rejection is achieved using 19.8 Hz (SF = 69) update rate. Normal mode rejection in this case is 60 dB min.

9After a calibration if the analog input exceeds positive full scale, the converter will output all 1s. If the analog input is less than negative full scale, the device will

output all 0s.

10 FS = Full-Scale Input. FS = 1.024

× REFIN1/Gain on the main ADC, where REFIN1 = REFIN1(+) – REFIN1(–). FS = REFIN2 on the aux ADC when ARN = 1

in the aux ADC control register (AD1CON) and REFIN2/2 on the aux ADC when ARN = 0.

11 Input and output levels on the I/O Port are with respect to AV

DD and AGND.

12 Normal mode refers to the case where both main and aux ADCs are running.

13 ADC disable is entered by setting both the AD0EN and AD1EN bits in the main and aux ADC control registers to a 0 and setting the mode bits (MD2, MD1,

MD0) in the mode register to non-0.

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS

(TA = 25°C, unless otherwise noted.)

AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

AVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

DVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

AGND to DGND

2. . . . . . . . . . . . . . . . . . . –20 mV to +20 mV

PWRGND to AGND . . . . . . . . . . . . . . . . –20 mV to +20 mV

AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . –5 V to +5 V

Analog Input Voltage to AGND . . . .

–0.3 V to AVDD +0.3 V

Reference Input Voltage to AGND . .

–0.3 V to AVDD +0.3 V

Total AIN/REFIN Current (Indefinite) . . . . . . . . . . . . 30 mA

Digital Input Voltage to DGND . . . . –0.3 V to DVDD +0.3 V

Digital Output Voltage to DGND . . . –0.3 V to DVDD +0.3 V

Operating Temperature Range . . . . . . . . . . . –40°C to +85°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C

SOIC Package

JA Thermal Impedance

. . . . . . . . . . . . . . . . . . . . 71.4°C/W

JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 23°C/W

TSSOP Package

JA Thermal Impedance

. . . . . . . . . . . . . . . . . . . . 97.9°C/W

JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 14°C/W

Lead Temperature, Soldering

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C

NOTES

1 Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those listed in the operational

sections of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

2 AGND and DGND are connected internally within the AD7719.

ORDERING GUIDE

Model

Temperature Range

Package Description

Package Option

AD7719BR

–40°C to +85°C

SOIC

R-28

AD7719BRU

–40°C to +85°CTSSOP

RU-28

EVAL-AD7719EB

Evaluation Board

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