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ADS8507 Datasheet(PDF) 3 Page - Texas Instruments

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No. de Pieza. ADS8507
Descripción  16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
Descarga  32 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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ADS8507 Datasheet(HTML) 3 Page - Texas Instruments

 
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ADS8507
SLAS381 – DECEMBER 2006
ELECTRICAL CHARACTERISTICS (continued)
At T
A = -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.
ADS8507I
ADS8507IB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
MIN
TYP
MAX
DNL
Differential linearity error
-2
3
-1
1.5
LSB
No missing codes
15
16
Bits
Transition noise(2)
0.8
0.8
LSB
Gain Error
±0.2
±0.1
%
Full scale error(3)(4)
-0.5
0.5
-0.25
0.25
%
Full scale error drift
±7
±5
ppm/°C
Full scale error(3)(4)
Ext. 2.5-V Ref
-0.5
0.5
-0.25
0.25
%
Full scale error drift
Ext. 2.5-V Ref
±0.5
±0.5
ppm/°C
Bipolar zero error(3)
±10 V Range
-10
10
-5
5
mV
Bipolar zero error drift
±10 V Range
±0.5
±0.5
ppm/°C
Unipolar zero error(5)
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 from
2.2-µF Capacitor to CAP
1
1
ms
power down(6)
Power supply sensitivity
+4.75 V < VS < +5.25 V
±8
±8
LSB
(VDIG = VANA = VS)
AC ACCURACY
SFDR
Spurious-free dynamic range
fIN = 1 kHz, ±10 V
90
100
96
102
dB(7)
THD
Total harmonic distortion
fIN = 1 kHz, ±10 V
-100
-90
-100
-96
dB
fIN = 1 kHz, ±10 V
83
88
87
89.9
SINAD
Signal-to-(noise+distortion)
dB
-60 dB Input
30
32
SNR
Signal-to-noise
83
88
87
89.9
dB
Usable bandwidth(8)
fIN = 1 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(9)
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 (must
1
1
µA
use external buffer)
Internal reference drift
8
8
ppm/°C
External reference voltage range for
2.3
2.5
2.7
2.3
2.5
2.7
V
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
(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)
As measured with fixed resistors, see Figure 43. Adjustable to zero with external potentiometer.
(6)
This is the time delay after the ADS8507 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.
(7)
All specifications in dB are referred to a full-scale input.
(8)
Usable bandwidth defined as full-scale input frequency at which Signal-to-(Noise + Distortion) degrades to 60 dB.
(9)
Recovers to specified performance after 2 x FS input overvoltage.
3
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