AD7711A Analog Devices, AD7711A Datasheet - Page 4

• Manufacturer Part Number: AD7711A
• Description: CMOS, 24-Bit Sigma-Delta, Signal Conditioning ADC with RTD Current Source
• Manufacturer: Analog Devices

Specifications of AD7711A

• Resolution (bits): 24bit
• # Chan: 2
• Sample Rate: 19.5kSPS
• Interface: Ser
• Analog Input Type: Diff-Bip,Diff-Uni
• Ain Range: Bip (Vref)/(PGA Gain),Uni (Vref)/(PGA Gain)
• Adc Architecture: Sigma-Delta
• Pkg Type: DIP,SOIC

AD7711A–SPECIFICATIONS
Parameter
POWER REQUIREMENTS
NOTES
16
17
18
19
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
(T
AV
AV
AV
AV
DV
DV
V
V
Analog Input Voltage to AGND
Reference Input Voltage to AGND
REF OUT to AGND . . . . . . . . . . . . . . . . . . . . –0.3 V to AV
Digital Input Voltage to DGND . . . . . –0.3 V to AV
Digital Output Voltage to DGND . . . –0.3 V to DV
Operating Temperature Range
Storage Temperature Range . . . . . . . . . . . . . –65∞C to +150∞C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . +300∞C
Power Dissipation (Any Package) to 75∞C . . . . . . . . . . 450 mW
Derates Above 75∞C . . . . . . . . . . . . . . . . . . . . . . . . . 6 mW/∞C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
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 AD7711A 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.
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 the specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
The AD7711A is specified with a 10 MHz clock for AV
The ± 5% tolerance on the DV
Measured at dc and applies in the selected passband. PSRR at 50 Hz will exceed 120 dB with filter notches of 10 Hz, 25 Hz, or 50 Hz. PSRR at 60 Hz will exceed
PSRR depends on gain: Gain of 1: 70 dB typ; Gain of 2: 75 dB typ; Gain of 4: 80 dB typ; Gains of 8 to 128: 85 dB typ. These numbers can be improved (to 95 dB
than 10.5 V. Operating with AV
120 dB with filter notches of 10 Hz, 30 Hz, or 60 Hz.
typ) by deriving the V
SS
SS
Power Supply Voltages
Power Supply Currents
Power Supply Rejection
Power Dissipation
Commercial (A Version) . . . . . . . . . . . . . . . –40∞C to +85∞C
Extended (S Version) . . . . . . . . . . . . . . . . . –55∞C to +125∞C
A
. . . . . . . . . . . . . . . . . . . . . . . . . V
. . . . . . . . . . . . . . . . . . . . . . . . . V
DD
DD
DD
DD
DD
DD
Positive Supply (AV
Negative Supply (V
= 25∞C, unless otherwise noted.)
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –6 V
to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –6 V
AV
DV
AV
AV
DV
V
Normal Mode
Normal Mode
Standby (Power-Down) Mode
SS
to DV
to V
to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +12 V
to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +12 V
to AGND . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
to DGND . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
DD
DD
DD
DD
DD
Current
–V
Voltage
Current
Current
Voltage
SS
SS
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +12 V
Voltage
16
17
. . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +12 V
BIAS
SS
DD
)
voltage (via Zener diode or reference) from the AV
18
and DV
DD
DD
input is allowed provided that DV
voltages in the range 5.25 V to 10.5 V is guaranteed only over the 0 C to 70 C temperature range.
DD
)
19
SS
SS
A, S Versions
5 to 10
5
10.5
4
4.5
1.5
90
45
52.5
15
– 0.3 V to AV
– 0.3 V to AV
DD
voltages of 5 V ± 5%. It is specified with an 8 MHz clock for AV
DD
DD
DD
DD
DD
+ 0.3 V
+ 0.3 V
+ 0.3 V
+ 0.3 V
does not exceed AV
Unit
V nom
V nom
V max
mA max
mA max
mA max
dB typ
dB typ
mW max
mW max
mW max
DD
DD
–4–
supply.
Model
AD7711AAR
AD7711ASQ
*R = SOIC, Q = CERDIP.
Conditions/Comments
± 5% for Specified Performance
± 5% for Specified Performance
For Specified Performance
V
Rejection w.r.t. AGND; Assumes V
AV
AV
AV
SS
DD
DD
DD
DD
= –5 V
by more than 0.3 V.
= DV
= DV
= DV
DD
DD
DD
= +5 V, V
= +5 V, V
= +5 V, V
–40∞C to +85∞C
–55∞C to +125∞C
Temperature Range
ORDERING GUIDE
SS
SS
SS
= 0 V; Typically 25 mW
= –5 V; Typically 30 mW
= 0 V or –5 V; Typically 7 mW
DD
voltages greater than 5.25 V and less
BIAS
WARNING!
Is Fixed
Package Options*
RW-24
Q-24
ESD SENSITIVE DEVICE
REV. D