ANALOG-TO-DIGITAL CONVERTER. ADS8506 Datasheet

ADS8506 CONVERTER. Datasheet pdf. Equivalent


Burr-Brown Corporation ADS8506
BurrĆBrown Products
from Texas Instruments
ADS8506
SLAS484A – SEPTEMBER 2007 – REVISED OCTOBER 2007
12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH
INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
FEATURES
1
2 40-kHz Min Sampling Rate
4-V, 5-V, and ±10-V Input Ranges
73.9-dB SINAD with 10-kHz Input
±0.45 LSB Max INL
±0.45 LSB Max DNL, 12-Bit No Missing Codes
±5-mV BPZ, ±0.5 PPM/°C BPZ Drift
SPI Compatible Serial Output With
Daisy-Chain (TAG) Feature
Single 5-V Analog Supply
Pin-Compatible With ADS7806 and 16-Bit
ADS7807/8507
Uses Internal or External 2.5-V Reference
Low Power Dissipation
– 24 mW Typ, 30 mW Max at 40 KSPS
50-μW Max Power Down Mode
28-Pin SO Package
Full Parallel Interface
2's Comp or BTC Output Code
APPLICATIONS
Industrial Process Control
Test Equipment
Medical Equipment
Data Acquisition Systems
Digital Signal Processing
Instrumentation
DESCRIPTION
The ADS8506 is a complete low power, single 5-V
supply, 12-bit sampling analog-to-digital (A/D)
converter. It contains a complete 12-bit
capacitor-based, successive approximation register
(SAR) A/D converter with sample and hold, clock,
reference, and data interface. The converter can be
configured for a variety of input ranges including ±10
V, 4 V, and 5 V. For most input ranges, the input
voltage can swing to 25 V or –25 V without damage
to the converter.
A SPI compatible serial interface allows data to be
synchronized to an internal or external clock. A full
parallel interface with BYTE select is also provided to
allow the maximum system design flexibility. The
ADS8506 is specified at 40 kHz sampling rate over
the industrial -40°C to 85°C temperature range.
Successive Approximation Register
Clock EXT/IN
R1IN
R2IN
39.8 k
9.9 k
20 k
CAP
REF
40 k
CDAC
Buffer
6 k
Comparator
Parallel
and
Serial
Data
Out
&
Control
Internal
+2.5 V Ref
Parallel
Data
PWRD
BYTE
BUSY
CS
R/C
SB/BTC
TAG
SDATA
DATACLK
REFD
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
QSPI, SPI are trademarks of Motorola.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated


ADS8506 Datasheet
Recommendation ADS8506 Datasheet
Part ADS8506
Description 12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER
Feature ADS8506; BurrĆBrown Products from Texas Instruments ADS8506 SLAS484A – SEPTEMBER 2007 – REVISED OCTOBER 2007.
Manufacture Burr-Brown Corporation
Datasheet
Download ADS8506 Datasheet




Burr-Brown Corporation ADS8506
ADS8506
SLAS484A – SEPTEMBER 2007 – REVISED OCTOBER 2007
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
PACKAGE/ORDERING INFORMATION(1)
PRODUCT
MINIMUM
INL
(LSB)
ADS8506IB
±0.45
ADS8506I
±0.45
NO
MISSING
CODE
12
12
FULL-
SCALE
ERROR
(%)
±0.25
±0.5
SPECIFICATION
TEMPERATURE
RANGE
-40°C to 85°C
-40°C to 85°C
PACKAGE PACKAGE
LEAD
DESIGNATOR
SO-28
SO-28
DW
DW
ORDERING
NUMBER
TRANSPORT
MEDIA, QTY
ADS8506IBDW
ADS8506IBDWR
ADS8506IDW
ADS8506IDWR
Tube, 20
Tape and Reel, 1000
Tube, 20
Tape and Reel, 1000
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)(1)
Analog inputs
R1IN
R2IN
REF
DGND, AGND2
Ground voltage differences
Digital inputs
VANA
VDIG to VANA
VDIG
Maximum junction temperature
Storage temperature range
Internal power dissipation
Lead temperature (soldering, 1.6 mm from case 10 seconds)
(1) All voltage values are with respect to network ground terminal.
UNIT
±25 V
±25 V
+VANA + 0.3 V to AGND2 - 0.3 V
±0.3 V
6V
0.3 V
6V
-0.3 V to +VDIG + 0.3 V
165°C
–65°C to 150°C
700 mW
260°C
ELECTRICAL CHARACTERISTICS
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.
PARAMETER
Resolution
ANALOG INPUT
Voltage ranges
Impedance
Capacitance
THROUGHPUT SPEED
Conversion time
Complete cycle
Throughput rate
DC ACCURACY
INL Integral linearity error
TEST CONDITIONS
See Table 1
Acquire and convert
ADS8506IB
MIN TYP
MAX
12
MINADS8506I
MIN TYP
MAX
12
UNIT
Bits
-10
10 -10
10
0
50
5V
0
40
4
45 45 pF
40
-0.45
±0.15
15
25
0.45
-0.45 ±0.15
15 μs
25
kHz
0.45 LSB(1)
(1) LSB means Least Significant Bit. One LSB for the ±10-V input range is 305 μV.
2 Submit Documentation Feedback
Product Folder Link(s): ADS8506
Copyright © 2007, Texas Instruments Incorporated



Burr-Brown Corporation ADS8506
ADS8506
www.ti.com
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.
PARAMETER
TEST CONDITIONS
DNL Differential linearity error
No missing codes
Transition noise(2)
Gain Error
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 drift
Recovery time to rated accuracy
from power down(5)
Power supply sensitivity
(VDIG = VANA = VS)
AC ACCURACY
SFDR Spurious-free dynamic range
THD Total harmonic distortion
SINAD Signal-to-(noise+distortion)
SNR
Signal-to-noise
Usable bandwidth(7)
Full-power bandwidth (-3 dB)
SAMPLING DYNAMICS
Aperture delay
Aperture jitter
Transient response
Overvoltage recovery(8)
REFERENCE
Internal reference voltage
Internal reference source current
(must use external buffer)
Internal reference drift
External reference voltage range
for specified linearity
External reference current drain
DIGITAL INPUTS
VIL Low-level input voltage
VIH High-level input voltage
IIL Low-level input current
IIH High-level input current
DIGITAL OUTPUTS
Ext. 2.5-V Ref
Ext. 2.5-V Ref
±10 V Range
±10 V Range
0 V to 5 V, 0 V to 4 V Ranges
0 V to 5 V, 0 V to 4 V Ranges
2.2-μF Capacitor to CAP
+4.75 V < VS < +5.25 V
fIN = 10 kHz, ±10 V
fIN = 10 kHz, ±10 V
fIN = 10 kHz, ±10 V
-60 dB Input
fIN = 10 kHz, ±10 V
FS Step
No load
Ext. 2.5-V Ref
VIL = 0 V
VIH = 5 V
MIN
-0.45
12
-0.25
-0.25
-10
-3
ADS8506IB
TYP
±0.15
0.1
±0.1
±5
±0.5
±0.5
±0.5
1
MAX
0.45
0.25
0.25
10
3
±0.5
98
-96 -80
72 73.9
32
72 74
130
600
40
20
5
750
2.48
2.3
2.5 2.52
1
8
2.5 2.7
100
-0.3 +0.8
2.0 VD +0.3 V
±10
±10
MINADS8506I
MIN TYP
±0.15
12
0.1
±0.1
-0.5
±5
-0.5
±0.5
-10
±0.5
-3
±0.5
1
MAX
0.45
0.5
0.5
10
3
UNIT
LSB
Bits
LSB
%
%
ppm/°C
%
ppm/°C
mV
ppm/°C
mV
ppm/°C
ms
±0.5
LSB
98
-96
72 73.9
32
72 74
130
600
dB (6)
-80 dB
dB
dB
kHz
kHz
40 ns
20 ps
5 μs
750 ns
2.48
2.3
2.5
1
8
2.5
2.52
V
μA
ppm/°C
2.7 V
100 μA
-0.3
+0.8
V
2.0
VD +0.3 V
V
±10 μA
±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) 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
Product Folder Link(s): ADS8506
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