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AD7891 Datasheet(PDF) 3 Page - Analog Devices

No. de Pieza. AD7891
Descripción  LC2MOS 8-Channel, 12-Bit High Speed Data Acquisition System
Descarga  20 Pages
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Fabricante  AD [Analog Devices]
Página de inicio  http://www.analog.com
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AD7891 Datasheet(HTML) 3 Page - Analog Devices

 
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–3–
REV. A
AD7891
ABY
Parameter
Version
1
Version
Version
Units
Test Conditions/Comments
LOGIC OUTPUTS
Output High Voltage, VOH
4.0
4.0
4.0
V min
ISOURCE = 200
µA
Output Low Voltage, VOL
0.4
0.4
0.4
V max
ISINK = 1.6 mA
DB11–DB0
Floating-State Leakage Current
± 10
± 10
± 10
µA max
Floating-State Capacitance
5
15
15
15
pF max
Output Coding
Straight (Natural) Binary
Data Format Bit of Control Register = 0
2s Complement
Data Format Bit of Control Register = 1
CONVERSION RATE
Conversion Time
1.6
1.6
1.6
µs max
Track/Hold Acquisition Time
0.6
0.6
0.6
µs max
AD7891-1 Hardware Conversion
0.7
0.7
0.7
µs max
AD7891-1 Software Conversion
0.4
0.4
0.4
µs max
AD7891-2
POWER REQUIREMENTS
VDD
+5
+5
+5
V nom
± 5% for Specified Performance
IDD
Normal Mode
17
17
18
mA max
Standby Mode
80
80
80
µA max
Logic Inputs = 0 V or VDD
Power Dissipation
VDD = 5 V
Normal Mode
85
85
90
mW max
Typically 70 mW
Standby Mode
400
400
400
µW max
Typically 75
µW
NOTES
1Temperature Ranges for the A and B Versions: –40
°C to +85°C. Temperature Range for the Y Version: –55°C to +105°C.
2The AD7891-1’s dynamic performance (THD and SNR) and the AD7891-2’s THD are measured with an input frequency of 10 kHz. The AD7891-2’s SNR is
evaluated with an input frequency of 100 kHz.
3This throughput rate can only be achieved when the part is operated in the parallel interface mode. Maximum achievable throughput rate in the serial interface mode
is 357 kSPS.
4See Terminology.
5Sample tested during initial release and after any redesign or process change that may affect this parameter.
6REF IN must be buffered before being applied to V
INXB.
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
AD7891-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±17 V
AD7891-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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 Version) . . . . . . . . . . . . – 40
°C to +85°C
Automotive (Y Version) . . . . . . . . . . . . . . –55
°C to +105°C
Storage Temperature Range . . . . . . . . . . . . –65
°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150
°C
PQFP Package, Power Dissipation . . . . . . . . . . . . . . 450 mW
θ
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 95
°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . +215
°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220
°C
PLCC Package, Power Dissipation . . . . . . . . . . . . . . 500 mW
θ
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 55
°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 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.
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 AD7891 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.
WARNING!
ESD SENSITIVE DEVICE


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