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ADS8506 Datenblatt(Datasheet) 3 Page - Burr-Brown (TI)

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Teile-Nr. ADS8506
Beschreibung  12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
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Hersteller  BURR-BROWN [Burr-Brown (TI)]
Homepage  http://www.burr-brown.com
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ADS8506
SLAS484A – SEPTEMBER 2007 – REVISED OCTOBER 2007
ELECTRICAL CHARACTERISTICS (continued)
At TA = -40°C to 85°C, fS = 40 kHz, VDIG = VANA = 5 V, and using internal reference and fixed resistors, (see Figure 43) unless
otherwise specified.
ADS8506IB
MINADS8506I
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
MIN
TYP
MAX
DNL
Differential linearity error
-0.45
±0.15
0.45
±0.15
0.45
LSB
No missing codes
12
12
Bits
Transition noise(2)
0.1
0.1
LSB
Gain Error
±0.1
±0.1
%
Full scale error(3)(4)
-0.25
0.25
-0.5
0.5
%
Full scale error drift
±5
±5
ppm/
°C
Full scale error(3)(4)
Ext. 2.5-V Ref
-0.25
0.25
-0.5
0.5
%
Full scale error drift
Ext. 2.5-V Ref
±0.5
±0.5
ppm/
°C
Bipolar zero error(3)
±10 V Range
-10
10
-10
10
mV
Bipolar zero error drift
±10 V Range
±0.5
±0.5
ppm/
°C
Unipolar zero error(3)
0 V to 5 V, 0 V to 4 V Ranges
-3
3
-3
3
mV
Unipolar zero error drift
0 V to 5 V, 0 V to 4 V Ranges
±0.5
±0.5
ppm/
°C
Recovery time to rated accuracy
1
2.2-
μF Capacitor to CAP
1
ms
from power down(5)
Power supply sensitivity
+4.75 V < VS < +5.25 V
±0.5
±0.5
LSB
(VDIG = VANA = VS)
AC ACCURACY
SFDR
Spurious-free dynamic range
fIN = 10 kHz, ±10 V
98
98
dB(6)
THD
Total harmonic distortion
fIN = 10 kHz, ±10 V
-96
-80
-96
-80
dB
fIN = 10 kHz, ±10 V
72
73.9
72
73.9
SINAD
Signal-to-(noise+distortion)
dB
-60 dB Input
32
32
SNR
Signal-to-noise
72
74
72
74
dB
Usable bandwidth(7)
fIN = 10 kHz, ±10 V
130
130
kHz
Full-power bandwidth (-3 dB)
600
600
kHz
SAMPLING DYNAMICS
Aperture delay
40
40
ns
Aperture jitter
20
20
ps
Transient response
FS Step
5
5
μs
Overvoltage recovery(8)
750
750
ns
REFERENCE
Internal reference voltage
No load
2.48
2.5
2.52
2.48
2.5
2.52
V
Internal reference source current
1
1
μA
(must use external buffer)
Internal reference drift
8
8
ppm/
°C
External reference voltage range
2.3
2.5
2.7
2.3
2.5
2.7
V
for specified linearity
External reference current drain
Ext. 2.5-V Ref
100
100
μA
DIGITAL INPUTS
VIL
Low-level input voltage
-0.3
+0.8
-0.3
+0.8
V
VIH
High-level input voltage
2.0
VD +0.3 V
2.0
VD +0.3 V
V
IIL
Low-level input current
VIL = 0 V
±10
±10
μA
IIH
High-level input current
VIH = 5 V
±10
±10
μA
DIGITAL OUTPUTS
(2)
Typical rms noise at worst case transitions.
(3)
As measured with fixed resistors, see Figure 43. Adjustable to zero with external potentiometer.
(4)
Full scale error is the worst case of -Full 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.
(5)
This is the time delay after the ADS8506 is brought out of Power-Down mode until all internal settling occurs and the analog input is
acquired to rated accuracy. A Convert command after this delay will yield accurate results.
(6)
All specifications in dB are referred to a full-scale input.
(7)
Usable bandwidth defined as full-scale input frequency at which Signal-to-(Noise + Distortion) degrades to 60 dB.
(8)
Recovers to specified performance after 2 x FS input overvoltage.
Copyright © 2007, Texas Instruments Incorporated
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