ELECTRICAL CHARACTERISTICS
At T
A
= –40°C to +85°C, f
S
= 100kHz, V
DIG
= V
ANA
= +5V, using internal reference and fixed resistors (see Figure 4), unless otherwise specified.
ADS7809U
PARAMETER
RESOLUTION
ANALOG INPUT
Voltage Ranges
Impedance
Capacitance
THROUGHPUT SPEED
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)
Unipolar Zero Error
(3)
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)
SAMPLING DYNAMICS
Aperture Delay
Transient Response
Overvoltage Recovery
(7)
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
(Must use external buffer)
External Reference Voltage Range
For Specified Linearity
External Reference Current Drain
DIGITAL INPUTS
Logic Levels
V
IL
V
IH(8)
I
IL
I
IH
CONDITIONS
MIN
TYP
MAX
16
±10,
0V to 5V, etc. (See Table I)
See Table I
35
✻
✻
✻
±3
+3, –2
15
1.3
±7
Ext. 2.5000V Ref
Ext. 2.5000V Ref
Bipolar Ranges
Bipolar Ranges
0V to 10V Ranges
0V to 4V, 0V to 5V Ranges
Unipolar Ranges
1µF Capacitor to CAP
+4.75V < V
D
< +5.25V
±2
±2
±0.5
✻
±0.5
✻
±10
✻
±5
±3
✻
✻
±8
✻
✻
✻
✻
✻
16
✻
✻
±2
±1
MIN
ADS7809UB
TYP
MAX
✻
UNITS
Bits
pF
µs
kHz
LSB
(1)
LSB
Bits
LSB
%
ppm/°C
%
ppm/°C
mV
ppm/°C
mV
mV
ppm/°C
ms
LSB
Acquire and Convert
100
10
±2
1
f
IN
= 20kHz
f
IN
= 20kHz
f
IN
= 20kHz
–60dB Input
f
IN
= 20kHz
90
83
83
100
–100
88
30
88
250
96
–90
86
86
✻
✻
✻
32
✻
✻
✻
–94
dB
(5)
dB
dB
dB
dB
kHz
40
FS Step
150
✻
2
✻
✻
✻
✻
✻
✻
ns
µs
ns
No Load
2.48
2.5
1
2.5
2.52
V
µA
V
µA
2.3
Ext. 2.5000V Ref
2.7
100
✻
✻
✻
–0.3
+2.0
V
IL
= 0V
V
IH
= 5V
+0.8
V
D
+ 0.3V
±10
±10
✻
✻
✻
✻
✻
✻
V
V
µA
µA
ADS7809
SBAS017C
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