AD7703 Analog Devices, AD7703 Datasheet - Page 3

• Manufacturer Part Number: AD7703
• Description: 20-Bit Sigma-Delta ADC
• Manufacturer: Analog Devices

Specifications of AD7703

• Resolution (bits): 20bit
• # Chan: 1
• Sample Rate: 16kSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Bip,SE-Uni
• Ain Range: Bip 2.5V,Uni 2.5V
• Adc Architecture: Sigma-Delta
• Pkg Type: DIP,SOIC

Parameter
POWER REQUIREMENTS
NOTES
10
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
(T
DV
DV
DV
AV
AV
AGND to DGND . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
Digital Input Voltage to DGND . . . . –0.3 V to DV
Analog Input Voltage to AGND . . . AV
Input Current to Any Pin Except Supplies
Operating Temperature Range
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . . 300°C
Power Dissipation (DIP Package) to 75°C . . . . . . . . . 450 mW
Derates above 75°C by . . . . . . . . . . . . . . . . . . . . . 10 mW/°C
Power Dissipation (SOIC Package) to 75°C . . . . . . . 250 mW
Derates above 75°C by . . . . . . . . . . . . . . . . . . . . . . 15 mW/°C
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
AD7703 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. E
1
2
3
4
5
6
7
8
9
The A
Source resistance should be 750
Temperature ranges are as follows: A, B, C Versions: –40°C to +85°C; S Version: –55°C to +125°C.
Applies after calibration at the temperature of interest. Full-scale error applies for both unipolar and bipolar input ranges.
Total drift over the specified temperature range after calibration at power-up at 25 °C. This is guaranteed by design and/or characterization. Recalibration at any
temperature will remove these errors.
In Unipolar mode, the offset can have a negative value (–V
The specifications for input overrange and for input span apply additional constraints on the offset calibration range.
For Unipolar mode, input span is the difference between full scale and zero scale. For Bipolar mode, input span is the difference between positive and negative full-scale
points. When using less than the maximum input span, the span range may be placed anywhere within the range of ± (V
All digital outputs unloaded. All digital inputs at 5 V CMOS levels.
Applies in 0.1 Hz to 10 Hz bandwidth. PSRR at 60 Hz will exceed 120 dB due to the digital filter.
CLKIN is stopped. All digital inputs are grounded.
A
DC Power Supply Currents
Power Supply Rejection
Power Dissipation
Normal Operation
Standby Operations
Industrial (A, B, C Versions) . . . . . . . . . . . –40°C to +85°C
Extended (S Version) . . . . . . . . . . . . . . . . –55°C to +125°C
DD
SS
= 25°C, unless otherwise noted.)
DD
DD
SS
Analog Positive Supply (AI
Digital Positive Supply (DI
Analog Negative Supply (AI
Digital Negative Supply (DI
Positive Supplies
Negative Supplies
A, B, C
S
to AGND . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –6 V
to AGND . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –6 V
IN
to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
to AGND . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
to AV
pin presents a very high impedance dynamic load that varies with clock frequency. A ceramic 1 nF capacitor from the A
DD
. . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
10
9
8
DD
DD
SS
SS
)
)
)
)
or less.
A/S Version
2.7
2
2.7
0.1
70
75
37
20
40
1
SS
– 0.3 V to AV
2
. . . . . . . . ± 10 mA
2
REF
) such that the Unipolar mode can mimic Bipolar mode operation.
DD
DD
B Version
2.7
2
2.7
0.1
70
75
37
20
40
+ 0.3 V
+ 0.3 V
2
–3–
NOTES
1
2
Model
AD7703AN
AD7703BN
AD7703CN
AD7703AR
AD7703BR
AD7703CR
AD7703AQ
AD7703BQ
AD7703CQ
AD7703SQ
*N = Plastic DIP; R = SOIC; Q = CERDIP.
Stresses above those listed under Absolute Maximum Ratings may cause
permanent 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.
Transient currents of up to 100 mA will not cause SCR latch-up.
C Version
2.7
2
2.7
0.1
70
75
37
20
40
2
Temperature
Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°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
Unit
mA max
mA max
mA max
mA max
dB typ
dB typ
mW max
µW max
µW max
ORDERING GUIDE
REF
+ 0.1).
Typically 0.03 mA
Test Conditions/Comments
Typically 2 mA
Typically 1 mA
Typically 2 mA
SLEEP = Logic 1,
Typically 25 mW
SLEEP = Logic 0,
Typically 10 µW
IN
pin to AGND is necessary.
Linearity
Error
(% FSR)
0.003
0.0015
0.0012
0.003
0.0015
0.0012
0.003
0.0015
0.0012
0.003
AD7703
Package
Options*
N-20
N-20
N-20
R-20
R-20
R-20
Q-20
Q-20
Q-20
Q-20