AD7719 データシートの表示（PDF） - Analog Devices
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AD7719 Datasheet PDF : 40 Pages
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AD7719
Parameter
AD7719B
Unit
Test Conditions
Power Supply Currents (Continued)
AIDD Current (Main ADC)
1.1
0.55
AIDD Current (Aux ADC)
0.3
AIDD Current (Main and Aux ADC) 1.25
DIDD (ADC Disable Mode)13
0.35
0.4
AIDD (ADC Disable Mode)
0.15
DIDD (Power-Down Mode)
10
2
30
8
AIDD (Power-Down Mode)
1
mA max
mA max
mA max
mA max
mA max
mA max
mA max
µA max
µA max
µA max
µA max
µA max
AVDD = 3 V or 5 V, Buffered Mode,
0.85 mA typ
AVDD = 3 V or 5 V, Unbuffered Mode,
0.45 mA typ
AVDD = 3 V or 5 V, 0.25 mA typ
AVDD = 3 V or 5 V, Main ADC Buffered,
1 mA typ
DVDD = 3 V, 0.25 mA typ
DVDD = 5 V, 0.3 mA typ
AVDD = 3 V or 5 V
DVDD = 3 V, 32.768 kHz Osc. Running
DVDD = 3 V, Oscillator Powered Down
DVDD = 5 V, 32.768 kHz Osc. Running
DVDD = 5 V, Oscillator Powered Down
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 AVDD = 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.
10FS = 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 AVDD and AGND.
12Normal mode refers to the case where both main and aux ADCs are running.
13ADC 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 RATINGS1
(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 DGND2. . . . . . . . . . . . . . . . . . . –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
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . 71.4°C/W
θJC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 23°C/W
TSSOP Package
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . 97.9°C/W
θJC 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.
Model
AD7719BR
AD7719BRU
EVAL-AD7719EB
ORDERING GUIDE
Temperature Range
–40°C to +85°C
–40°C to +85°C
Package Description
SOIC
TSSOP
Evaluation Board
–6–
Package Option
R-28
RU-28
REV. A
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