SPECIFICATIONS
ELECTRICAL
TA = –40°C to +85°C, fS = 100kHz, VDIG = VANA = +5V, using internal reference, unless otherwise specified.
ADS7820P/U
ADS7820PB/UB
TYP
PARAMETER
RESOLUTION
CONDITIONS
MIN
TYP
MAX
MIN
MAX
UNITS
12
✱
Bits
ANALOG INPUT
Voltage Ranges
Impedance
0 to +5
10
35
✱
✱
✱
V
kΩ
pF
Capacitance
THROUGHPUT SPEED
Conversion Time
Complete Cycle
5.7
8
10
✱
✱
✱
µs
µs
Acquire and Convert
Throughput Rate
100
✱
kHz
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
±1.0
±1.0
±0.5
±0.5
LSB(1)
LSB
Bits
LSB
%
ppm/°C
%
ppm/°C
mV
ppm/°C
LSB
Guaranteed
0.1
✱
✱
±0.5
±0.5
±8
±0.25
±0.25
±4
±7
±2
±2
±5
✱
Ext. 2.5000V Ref
Ext. 2.5000V Ref
Offset Error Drift
Power Supply Sensitivity
(VDIG = VANA = VD)
✱
+4.75V < VD < +5.25V
±0.75
±0.5
AC ACCURACY
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise+Distortion)
Signal-to-Noise
f
IN = 45kHz
80
✱
dB(5)
dB
dB
dB
kHz
fIN = 45kHz
fIN = 45kHz
fIN = 45kHz
–80
✱
70
70
72
72
Full-Power Bandwidth(6)
250
✱
SAMPLING DYNAMICS
Aperture Delay
Transient Response
Overvoltage Recovery(7)
40
✱
✱
ns
µs
ns
FS Step
2
✱
✱
150
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
(Must use external buffer.)
External Reference Voltage Range
for Specified Linearity
2.48
2.3
2.5
1
2.52
✱
✱
✱
✱
V
µA
2.5
2.7
✱
✱
✱
V
External Reference Current Drain
Ext. 2.5000V Ref
100
µA
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
–0.3
+2.0
+0.8
VD +0.3V
±10
✱
✱
✱
✱
✱
✱
V
V
µA
µA
IIH
±10
DIGITAL OUTPUTS
Data Format
Data Coding
VOL
Parallel 12 bits
Straight Binary
+0.4
ISINK = 1.6mA
ISOURCE = 500µA
High-Z State,
VOUT = 0V to VDIG
High-Z State
✱
✱
✱
V
V
µA
VOH
+4
✱
Leakage Current
±5
Output Capacitance
15
pF
DIGITAL TIMING
Bus Access Time
Bus Relinquish Time
83
83
✱
✱
ns
ns
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.
®
2
ADS7820
BB [ BURR-BROWN CORPORATION ]
