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ADS8515 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
ADS8515 16-Bit 250-kSPS Sampling CMOS ANALOG-TO-DIGITAL CONVERTER TI
Texas Instruments TI
ADS8515 Datasheet PDF : 24 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
ADS8515
www.ti.com
SLAS460D – JUNE 2007 – REVISED SEPTEMBER 2010
ELECTRICAL CHARACTERISTICS
At TA = –40°C to 85°C, fs = 250 kHz, VDIG = VANA = 5 V, and using internal reference (unless otherwise noted).
PARAMETER
TEST CONDITIONS
ADS8515I
MIN
TYP
MAX
ADS8515IB
MIN
TYP
MAX
Resolution
16
16
ANALOG INPUT
Voltage range
±10
±10
Impedance
8.885
8.885
Capacitance
75
75
THROUGHPUT SPEED
Conversion cycle time
Acquire and convert
4
4
Throughput rate
250
250
DC ACCURACY
INL
Integral linearity error
–3
3
–2
2
DNL
Differential linearity error
–1
2
–1
1
No missing codes
16
16
Transition noise(2)
0.67
0.67
Full-scale error(3) (4)
Int. Ref.
–0.5
0.5
–0.25
0.25
Full-scale error drift
Int. Ref.
±7
±7
Full-scale error(3) (4)
Ext. 4.096-V Ref.
–0.25
0.25
–0.1
0.1
Full-scale error drift
Ext. 4.096-V Ref.
±2
±2
Bipolar zero error(3)
–4
4
–2
2
Bipolar zero error drift
±2
±2
Power supply sensitivity
(VDIG = VANA = VD)
+4.75 V < VD < +5.25 V
–8
AC ACCURACY
8
–8
8
SFDR
THD
Spurious-free dynamic range
Total harmonic distortion
SINAD Signal-to-(noise+distortion)
fI = 20 kHz
fI = 20 kHz
fI = 20 kHz
–60-dB Input
95
102
–100
87
91
30
97
102
–94
–100
–96
89
91
32
SNR
Signal-to-noise ratio
Full-power bandwidth(6)
fI = 20 kHz
88
92
500
90
92
500
SAMPLING DYNAMICS
Aperture delay
5
5
Transient response
FS Step
2
2
Overvoltage recovery(7)
150
150
REFERENCE
Internal reference voltage
4.076 4.096
4.116
4.076 4.096
4.116
Internal reference source current (must
use external buffer)
1
1
Internal reference drift
8
8
External reference voltage range for
specified linearity
3.9 4.096
4.2
3.9 4.096
4.2
External reference current drain
Ext. 4.096-V Ref.
100
100
DIGITAL INPUTS
Logic levels
VIL
Low-level input voltage
VIH
High-level input voltage
IIL
Low-level input current
IIH
High-level input current
DIGITAL OUTPUTS
VDIG = 1.65 V – 5.25 V
VDIG = 1.65 V – 5.25 V
VIL = 0 V
VIH = 5 V
–0.3
0.65*VDIG
0.8
VDIG+0.3 V
±10
±10
–0.3
0.65*VDIG
0.35*VDIG
VDIG+0.3 V
±10
±10
UNIT
Bits
V
k
pF
ms
kHz
LSB (1)
LSB (1)
Bits
LSB
%FSR
ppm/°C
%FSR
ppm/°C
mV
ppm/°C
LSB
dB (5)
dB
dB
dB
dB
kHz
ns
ms
ns
V
mA
ppm/°C
V
mA
V
V
mA
mA
(1) LSB means least significant bit. For the 16-bit, ±10-V input ADS8515, one LSB is 305 mV.
(2) Typical rms noise at worst case transitions and temperatures.
(3) As measured with fixed resistors shown in Figure 22. Adjustable to zero with external potentiometer.
(4) Full-scale error is the worst case of –full-scale or +full-scale 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) All specifications in dB are referred to a full-scale ±10-V input.
(6) Full-power bandwidth is defined as the full-scale input frequency at which signal-to-(noise + distortion) degrades to 60 dB, or 10 bits of
accuracy.
(7) Recovers to specified performance after 2 x FS input overvoltage.
Copyright © 2007–2010, Texas Instruments Incorporated
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