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SBAS014A – MARCH 1992 – REVISED SEPTEMBER 2010
ELECTRICAL CHARACTERISTICS
At T
A
= –40°C to +70°C, f
S
= 800kHz, +V
DIG
= +V
ANA
= +5V, –V
ANA
= –5V, using internal reference and the 50Ω input resistor
shown in
unless otherwise specified.
PARAMETER
RESOLUTION
ANALOG INPUT
Voltage range
Impedance
Capacitance
THROUGHPUT SPEED
Conversion cycle
Complete cycle
Throughput rate
DC ACCURACY
Integral linearity error
Differential linearity error
No missing codes
Transition noise
(2)
Full-scale error
(3) (4)
ADS7819UB
(1)
UNIT
MAX
12
MIN
TYP
MAX
12
Bits
TEST CONDITIONS
MIN
TYP
+In – (–In)
±10
3.1
5
±10
3.1
5
V
kΩ
pF
t
3
+ t
4
Acquire and convert
800
1020
1250
800
1020
1250
ns
ns
kHz
±3
±3
Ensured
0.1
±1
±12
Ext. 2.5000V Ref
Ext. 2.5000V Ref
±12
±8
±2
+4.75V < V
D
< +5.25V
–5.25V < –V
ANA
< –4.75V
±5
±0.5
±2
±1
±12
±12
Ensured
0.1
±2
±3
LSB
LSB
LSB
±0.75
%
ppm/°C
±1
%
ppm/°C
±4
LSB
ppm/°C
±5
±0.5
LSB
LSB
Full-scale error drift
Full-scale error
(3) (4)
Full-scale error drift
Bipolar zero error
(3)
Bipolar zero error drift
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
Usable bandwidth
(6)
f
IN
= 250kHz
f
IN
= 250kHz
f
IN
= 250kHz
f
IN
= 250kHz
74
82
–80
–74
77
84
–82
–77
dB
(5)
dB
dB
dB
MHz
67
66
71
71
1.5
69
70
71
71
1.5
SAMPLING DYNAMICS
Aperture delay
Aperture jitter
Transient response
Overvoltage recovery
REFERENCE
Internal reference voltage
Internal reference dc source
current
(external load should be static)
Internal reference drift
External reference voltage range
for specified linearity
External reference current drain
DIGITAL INPUTS
V
IL
Logic levels
V
IH
I
IL
I
IH
V
IL
= 0V
V
IH
= 5V
–0.3
+2.4
+0.8
V
D
+ 0.3
±10
±10
–0.3
+2.4
+0.8
V
D
+ 0.3
±10
±10
V
V
mA
v
Ext. 2.5000V Ref
2.3
2.48
2.5
100
8
2.5
2.7
100
2.3
2.52
2.48
2.5
100
8
2.5
2.7
100
2.52
V
mA
ppm/°C
V
mA
(7)
20
10
Full-scale step
200
250
20
10
200
250
ns
ps
ns
ns
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Shaded cells indicate same specifications as the ADS7810U.
Typical rms noise at worst-case transitions and temperatures.
Measured with 50Ω in series with analog input. Adjustable to zero with external potentiometer.
Full-scale error is the worst case of –Ful-Scale or +Full-Scale untrimmed deviation from ideal first and last code transitions, divided by
the transition voltage (not divided by the full-scale range) and includes the effect of offset error.
All specifications in dB are referred to a full-scale ±10V input.
Usable bandwidth defined as Full-Scale input frequency at which Signal-to-(Noise+Distortion) degrades to 60dB, or 10 bits of accuracy.
Recovers to specified performance after 2 x FS input over voltage.
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