AD7890(RevA) Просмотр технического описания (PDF) - Analog Devices
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AD7890 Datasheet PDF : 20 Pages
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AD7890
Parameter
A Versions1 B Versions S Version Units
Test Conditions/Comments
LOGIC OUTPUTS
Output High Voltage, VOH
Output Low Voltage, VOL
Serial Data Output Coding
AD7890-10
AD7890-4
AD7890-2
4.0
4.0
4.0
0.4
0.4
0.4
2s Complement
Straight (Natural) Binary
Straight (Natural) Binary
V min
V max
ISOURCE = 200 µA
ISINK = 1.6 mA
CONVERSION RATE
Conversion Time
5.9
Track/Hold Acquisition Time2, 5
2
5.9
5.9
2
2
µs max
µs max
fCLK IN = 2.5 MHz, MUX OUT
Connected to SHA IN
POWER REQUIREMENTS
VDD
+5
IDD (Normal Mode)
10
IDD (Standby Mode)6 @ +25°C
15
Power Dissipation
Normal Mode
50
Standby Mode @ +25°C
75
+5
+5
10
10
15
15
50
50
75
75
V nom
mA max
µA typ
mW max
µW typ
± 5% for Specified Performance
Logic Inputs = 0 V or VDD
Logic Inputs = 0 V or VDD
Typically 30 mW
NOTES
1Temperature ranges are as follows: A, B Versions: –40°C to –85°C; S Version: –55°C to +125°C.
2See Terminology.
3This sample rate is only achievable when tiling the part in external clocking mode.
4Full-scale error match applies to positive full scale for the AD7890-2 and AD7890-4. It applies to both positive and negative full scale for the AD7890-10.
5Sample tested @ +25°C to ensure compliance.
6Analog inputs on AD7890-10 must be at 0 V to achieve correct power-down current.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
(TA = +25°C unless otherwise noted)
VDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
VDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
Analog Input Voltage to AGND
AD7890-10, AD7890-4 . . . . . . . . . . . . . . . . . . . . . . . ± 17 V
AD7890-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . –5 V, +10 V
Reference Input Voltage to AGND . . . –0.3 V to VDD + 0.3 V
Digital Input Voltage to DGND . . . . . –0.3 V to VDD + 0.3 V
Digital Output Voltage to DGND . . . . –0.3 V to VDD + 0.3 V
Operating Temperature Range
Commercial (A, B Versions) . . . . . . . . . . . –40°C to +85°C
Extended (S Version) . . . . . . . . . . . . . . . . –55°C to +125°C
Storage Temperature Range . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Plastic DIP Package, Power Dissipation . . . . . . . . . . 450 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . 105°C/W
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . +260°C
Cerdip Package, Power Dissipation . . . . . . . . . . . . . . 450 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 70°C/W
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . +300°C
SOIC Package, Power Dissipation . . . . . . . . . . . . . . . 450 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 75°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and 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.
ORDERING GUIDE
Model
Temperature
Range
AD7890AN-2
AD7890BN-2
AD7890AR-2
AD7890BR-2
AD7890SQ-2
AD7890AN-4
AD7890BN-4
AD7890AR-4
AD7890BR-4
AD7890SQ-4
AD7890AN-10
AD7890BN-10
AD7890AR-10
AD7890BR-10
AD7890SQ-10
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–55°C to +125°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–55°C to +125°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–55°C to +125°C
NOTE
*N = Plastic DIP; Q = Cerdip; R = SOIC.
Linearity
Error
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
Package
Option*
N-24
N-24
R-24
R-24
Q-24
N-24
N-24
R-24
R-24
Q-24
N-24
N-24
R-24
R-24
Q-24
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD7890 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
REV. A
–3–
WARNING!
ESD SENSITIVE DEVICE
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