Texas Instruments ADS8383 Handleiding
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SLAS005C − DECEMBER 2002 − REVISED FEBRUARY 2005
FEATURES
D500-kHz Sample Rate
D18-Bit NMC Ensured Over Temperature
DZero Latency
DLow Power: 110 mW at 500 kHz
DUnipolar Input Range
DOnboard Reference Buffer
DHigh-Speed Parallel Interface
DWide Digital Supply
D8-/16-/18-Bit Bus Transfer
D48-Pin TQFP Package
APPLICATIONS
DMedical Instruments
DOptical Networking
DTransducer Interface
DHigh Accuracy Data Acquisition Systems
DMagnetometers
DESCRIPTION
The ADS8383 is an 18-bit, 500 kHz A/D converter. The
device includes a 18-bit capacitor-based SAR A/D
converter with inherent sample and hold. The ADS8383
offers a full 18-bit interface, a 16-bit option where data is
read using two read cycles or an 8-bit bus option using
three read cycles.
The ADS8383 is available in a 48-lead TQFP package and
is characterized over the industrial −40°C to 85°C
temperature range.
CDAC
_
+
Output
Latches
and
3-State
Drivers
BUS 18/16
BYTE
18-/16-/8-Bit
Parallel DATA
Output Bus
SAR
Conversion
and
Control Logic
Comparator
Clock
+IN
−IN
REFIN
CONVST
BUSY
CS
RD
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("!"#$ &" '+*(!(%&"' +*# &0* &*#$' "! *1%' '&#)$*&' '&%.%#. 2%##%&3/
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2002−2005, Texas Instruments Incorporated
SLAS005C − DECEMBER 2002 − REVISED FEBRUARY 2005
www.ti.com
2
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.
ORDERING INFORMATION
MODEL
MAXIMUM
INTEGRAL
LINEARITY
(LSB)
MAXIMUM
DIFFERENTIAL
LINEARITY
(LSB)
NO
MISSING
CODES
RESOLU-
TION (BIT)
PACKAGE
TYPE
PACKAGE
DESIGNATOR
TEMPER-
ATURE
RANGE
ORDERING
INFORMATION
TRANS-
PORT
MEDIA
QUANTITY
ADS8383I
±10
−2~7
17
48 Pin
PFB
−40
°
C to
ADS8383IPFBT
Tape and
reel 250
ADS8383I
±
10
−2~7
17
48 Pin
TQFP
PFB
−40C to
85°C
ADS8383IPFBR
Tape and
reel 1000
ADS8383IB
±7
−1~2.5
18
48 Pin
PFB
−40
°
C to
ADS8383IBPFBT
Tape and
reel 250
ADS8383IB
±
7
−1~2.5
18
48 Pin
TQFP
PFB
−40C to
85°C
ADS8383IBPFBR
Tape and
reel 1000
NOTE:
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)
UNIT
Voltage
+IN to AGND−0.4 V to +VA + 0.1 V
Voltage
−IN to AGND−0.4 V to 0.5 V
+VA to AGND−0.3 V to 7 V
Voltage
+VBD to BDGND−0.3 V to 7 V
Voltage
+VA to +VBD−0.3 V to 2.5 V
Digital input voltage to BDGND−0.3 V to +VBD + 0.3 V
Digital output voltage to BDGND−0.3 V to +VBD + 0.3 V
Operating free-air temperature range, T
A
−40°C to 85°C
Storage temperature range, T
stg
−65°C to 150°C
Junction temperature (T
J
max)150°C
TQFP package
Power dissipation(T
J
Max − T
A
)/θ
JA
TQFP package
θ
JA
thermal impedance86°C/W
Lead temperature, soldering
Vapor phase (60 sec)215°C
Lead temperature, soldering
Infrared (15 sec)220°C
(1)
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
SLAS005C − DECEMBER 2002 − REVISED FEBRUARY 2005
www.ti.com
3
SPECIFICATIONS
T
A
= −40°C to 85°C, +VA = 5 V, +VBD = 3 V or 5 V, V
ref
= 4.096 V, f
SAMPLE
= 500 kHz (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
Analog Input
Full-scale input voltage (see Note 1)+IN − −IN0V
ref
V
Absolute input voltage
+IN−0.2V
ref
+ 0.2
V
Absolute input voltage
−IN−0.20.2
V
Input capacitance45pF
Input leakage current1nA
System Performance
Resolution18Bits
ADS8383I
(+IN − −IN) < 0.5 FS17
No missing codes
ADS8383I
(+IN − −IN) ≥0.5 FS17
Bits
No missing codes
ADS8383IB18
Bits
(+IN − −IN) < 0.125 FS−44
Integral linearity (see Notes 2 and 3)
ADS8383I
(+IN − −IN) < 0.5 FS−66
LSB
Integral linearity (see Notes 2 and 3)
ADS8383I
(+IN − −IN) ≥0.5 FS−1010
LSB
(18 bit)
ADS8383IB−7−2/37
(18 bit)
(+IN − −IN) < 0.125 FS−12
Differential linearity
ADS8383I
(+IN − −IN) < 0.5 FS−13
LSB (18 bit)
Differential linearity
ADS8383I
(+IN − −IN) ≥0.5 FS−27
LSB (18 bit)
ADS8383IB−1−1/1.42.5
Offset error (see Note 4)
ADS8383I−1±0.51
mV
Offset error (see Note 4)
ADS8383IB−0.75±0.250.75
mV
Gain error (see Note 4)
ADS8383IV
ref
= 4.096 V−0.10.1%FS
Gain error (see Note 4)
ADS8383IBV
ref
= 4.096 V−0.060.06%FS
Noise60µV RMS
Power supply rejection ratioAt 3FFFFh output code75dB
Sampling Dynamics
Conversion time1.52µs
Acquisition time0.4µs
Throughput rate500kHz
Aperture delay4ns
Aperture jitter15ps
Step response150ns
Over voltage recovery150ns
(1)
Ideal input span, does not include gain or offset error.
(2)
LSB means least significant bit
(3)
This is endpoint INL, not best fit.
(4)
Measured relative to an ideal full-scale input (+IN − −IN) of 4.096 V
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8383 |
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