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2
ADS7820
SPECIFICATIONS
ELECTRICAL
T
A
= –40
°
C to +85
°
C, f
S
= 100kHz, V
DIG
= V
ANA
= +5V, using internal reference, unless otherwise specified.
ADS7820P/U
ADS7820PB/UB
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
Guaranteed
0.1
RESOLUTION
12
,
Bits
ANALOG INPUT
Voltage Ranges
Impedance
Capacitance
0 to +5
10
35
,
,
,
V
k
pF
THROUGHPUT SPEED
Conversion Time
Complete Cycle
Throughput Rate
5.7
8
,
,
,
μ
s
μ
s
kHz
Acquire and Convert
10
100
,
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
Offset Error
Offset Error Drift
Power Supply Sensitivity
(V
DIG
= V
ANA
= V
D
)
±
1.0
±
1.0
±
0.5
±
0.5
LSB
(1)
LSB
Bits
LSB
%
ppm/
°
C
%
ppm/
°
C
mV
ppm/
°
C
LSB
,
,
±
0.5
±
0.25
±
7
±
5
Ext. 2.5000V Ref
Ext. 2.5000V Ref
±
0.5
±
0.25
±
2
,
±
8
±
4
±
2
,
+4.75V < V
D
< +5.25V
±
0.75
±
0.5
AC ACCURACY
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise+Distortion)
Signal-to-Noise
Full-Power Bandwidth
(6)
f
IN
= 45kHz
f
IN
= 45kHz
f
IN
= 45kHz
f
IN
= 45kHz
80
,
dB
(5)
dB
dB
dB
kHz
–80
,
70
70
72
72
250
,
SAMPLING DYNAMICS
Aperture Delay
Transient Response
Overvoltage Recovery
(7)
40
,
ns
μ
s
ns
FS Step
2
,
150
,
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
(Must use external buffer.)
External Reference Voltage Range
for Specified Linearity
External Reference Current Drain
2.48
2.5
1
2.52
,
,
,
,
V
μ
A
2.3
2.5
2.7
,
,
,
V
Ext. 2.5000V Ref
100
,
μ
A
DIGITAL INPUTS
Logic Levels
V
IL
V
IH
I
IL
I
IH
–0.3
+2.0
+0.8
,
,
,
,
,
,
V
V
μ
A
μ
A
V
D
+0.3V
±
10
±
10
DIGITAL OUTPUTS
Data Format
Data Coding
V
OL
V
OH
Leakage Current
Parallel 12 bits
Straight Binary
+0.4
I
SINK
= 1.6mA
I
SOURCE
= 500
μ
A
High-Z State,
V
OUT
= 0V to V
DIG
High-Z State
,
V
V
μ
A
+4
,
±
5
,
Output Capacitance
15
,
pF
DIGITAL TIMING
Bus Access Time
Bus Relinquish Time
83
83
,
,
ns
ns