ADS8506 CONVERTER Datasheet

ADS8506 Datasheet, PDF, Equivalent


Part Number

ADS8506

Description

12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER

Manufacture

Burr-Brown Corporation

Total Page 28 Pages
Datasheet
Download ADS8506 Datasheet


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
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


Features BurrĆBrown Products from Texas Instrume nts ADS8506 SLAS484A – SEPTEMBER 200 7 – REVISED OCTOBER 2007 12-BIT 40-K SPS LOW POWER SAMPLING ANALOG-TO-DIGITA L CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE 1 FEATURES 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 C ompatible Serial Output With Daisy-Chai n (TAG) Feature Single 5-V Analog Suppl y Pin-Compatible With ADS7806 and 16-Bi t ADS7807/8507 Uses Internal or Externa l 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 Pack age Full Parallel Interface 2's Comp or BTC Output Code APPLICATIONS • • • • • • Industrial Process Cont rol Test Equipment Medical Equipment Da ta Acquisition Systems Digital Signal P rocessing Instrumentation • • • • • • • 2 DESCRIPTION The ADS8506 is a complete low power, single 5-V supply, 12-bit sampling .
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