ABSOLUTE MAXIMUM RATINGS
(1)
Analog Inputs: R1
IN
..........................................................................
±25V
R2
IN
..........................................................................
±25V
R3
IN
..........................................................................
±25V
CAP ..................................... V
ANA
+0.3V to AGND2 –0.3V
REF ....................................... Indefinite Short to AGND2,
Momentary Short to V
ANA
Ground Voltage Differences: DGND, AGND2 .................................
±0.3V
V
ANA
...................................................................................................... 7V
V
DIG
to V
ANA
....................................................................................... +0.3
V
DIG
....................................................................................................... 7V
Digital Inputs ............................................................. –0.3V to V
DIG
+0.3V
Maximum Junction Temperature .................................................. +165°C
Internal Power Dissipation ............................................................ 700mW
Lead Temperature (soldering, 10s) .............................................. +300°C
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
PACKAGE/ORDERING INFORMATION
MAXIMUM
INTEGRAL
LINEARITY
ERROR (LSB)
±0.9
"
±0.45
"
MINIMUM
SIGNAL-TO-
SPECIFIED
(NOISE + DISTORTION)
PACKAGE
TEMPERATURE
RATIO (DB)
PACKAGE-LEAD DESIGNATOR
(1)
RANGE
70
"
72
"
SO-20
"
"
"
DW
"
"
"
–40°C to +85°C
"
"
"
PRODUCT
ADS7808U
"
ADS7808UB
"
PACKAGE
MARKING
ADS7808U
"
ORDERING
NUMBER
ADS7808U
ADS7808U/1K
TRANSPORT
MEDIA, QUANTITY
Tube, 38
Tape and Reel, 1000
Tube, 38
Tape and Reel, 1000
ADS7808UB
ADS7808UB
"
ADS7808UB/1K
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
ELECTRICAL CHARACTERISTICS
At T
A
= –40°C to +85°C, f
S
= 100kHz, V
DIG
= V
ANA
= +5V, using internal reference and fixed resistors as shown in Figure 4, unless otherwise specified.
ADS7808U
PARAMETER
RESOLUTION
ANALOG INPUT
Voltage Ranges
Impedance
Capacitance
THROUGHPUT SPEED
Conversion Time
Complete Cycle
Throughput Rate
DC ACCURACY
Integral Linearity Error
Differential Linearity Error
No Missing Codes
Transition Noise
(2)
Full Scale Error
(3,4)
Full Scale Error Drift
Full Scale Error
(3,4)
Full Scale Error Drift
Bipolar Zero Error
(3)
Bipolar Zero Error Drift
Unipolar Zero Error
(3)
CONDITIONS
MIN
TYP
MAX
12
±10V,
0V to 5V, etc. (See Table I)
See Table I
35
✻
✻
✻
±0.9
±0.9
Specified
0.1
±7
Ext. 2.5000V Ref
Ext. 2.5000V Ref
Bipolar Ranges
Bipolar Ranges
0V to 10V Range
0V to 4V Range
0V to 5V Range
Unipolar Ranges
1µF Capacitor to CAP
+4.75V < V
D
< +5.25V
±2
±2
±0.5
±0.5
±10
±5
±3
±3
✻
✻
±5
✻
✻
±2
✻
✻
✻
✻
✻
±0.5
✻
±0.25
±0.25
±0.45
±0.45
✻
✻
MIN
ADS7808UB
TYP
MAX
✻
UNITS
Bits
pF
µs
µs
kHz
LSB
(1)
LSB
LSB
%
ppm/°C
%
ppm/°C
mV
ppm/°C
mV
mV
mV
ppm/°C
ms
LSB
5.7
Acquire and Convert
100
8
10
Unipolar Zero Error Drift
Recovery to Rated Accuracy
after Power Down
Power Supply Sensitivity
(V
DIG
= V
ANA
= V
D
)
AC ACCURACY
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise+Distortion)
Signal-to-Noise
Full-Power Bandwidth
(6)
±2
1
f
IN
=
f
IN
=
f
IN
=
f
IN
=
45kHz
45kHz
45kHz
45kHz
80
70
70
90
–90
73
73
250
✻
–80
72
72
✻
✻
✻
✻
✻
✻
dB
(5)
dB
dB
dB
kHz
2
ADS7808
www.ti.com
SBAS018A
BURR-BROWN [ BURR-BROWN CORPORATION ]
