SPECIFICATIONS
ELECTRICAL
At TA = –40°C to +85°C, fS = 100kHz, VDIG = VANA = +5V, using internal reference and fixed resistors as shown in Figure 4, unless otherwise specified.
ADS7808P, U
TYP
ADS7808PB, UB
TYP
PARAMETER
RESOLUTION
CONDITIONS
MIN
MAX
MIN
MAX
UNITS
12
✻
Bits
ANALOG INPUT
Voltage Ranges
Impedance
±10V, 0V to 5V, etc. (See Table I)
See Table I
Capacitance
35
✻
pF
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
±0.9
±0.9
±0.45
±0.45
LSB(1)
LSB
Guaranteed
0.1
✻
✻
Transition Noise(2)
LSB
%
ppm/°C
%
ppm/°C
mV
ppm/°C
mV
mV
mV
ppm/°C
ms
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)
±0.5
±0.5
±10
±0.25
±0.25
✻
±7
±2
±2
±5
✻
Ext. 2.5000V Ref
Ext. 2.5000V Ref
Bipolar Ranges
Bipolar Ranges
±2
0V to 10V Range
0V to 4V Range
0V to 5V Range
Unipolar Ranges
1µF Capacitor to CAP
±5
±3
±3
✻
✻
✻
Unipolar Zero Error Drift
Recovery to Rated Accuracy
after Power Down
±2
1
✻
✻
Power Supply Sensitivity
(VDIG = VANA = VD)
+4.75V < VD < +5.25V
±0.5
✻
✻
LSB
AC ACCURACY
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise+Distortion)
Signal-to-Noise
fIN = 45kHz
80
90
–90
73
73
250
✻
✻
✻
✻
✻
✻
dB(5)
dB
dB
dB
kHz
fIN = 45kHz
–80
f
f
IN = 45kHz
IN = 45kHz
70
70
72
72
Full-Power Bandwidth(6)
SAMPLING DYNAMICS
Aperture Delay
Aperture Jitter
Transient Response
Overvoltage Recovery(7)
40
✻
✻
ns
ns
µs
ns
Sufficient to meet AC specs
FS Step
No Load
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
VIL = 0V
VIH = 5V
IIH
±10
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
ADS7808
BB [ BURR-BROWN CORPORATION ]
