ANALOG-TO-DIGITAL CONVERTER. ADS8344 Datasheet

ADS8344 CONVERTER. Datasheet pdf. Equivalent

ADS8344 Datasheet
Recommendation ADS8344 Datasheet
Part ADS8344
Description 16-Bit 8-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER
Feature ADS8344; ® ADS 834 ¤ 4 ADS8344 ADS 834 ¤ 4 For most current data sheet and other product informatio.
Manufacture Burr-Brown Corporation
Datasheet
Download ADS8344 Datasheet




Burr-Brown Corporation ADS8344
ADS8344 ¤
ADS8344 ¤
ADS8344
SBAS139E SEPTEMBER 2000 REVISED SEPTEMBER 2006
16-Bit, 8-Channel Serial Output Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q PIN FOR PIN WITH ADS7844
q SINGLE SUPPLY: 2.7V to 5V
q 8-CHANNEL SINGLE-ENDED OR
4-CHANNEL DIFFERENTIAL INPUT
q UP TO 100kHz CONVERSION RATE
q 84dB SINAD
q SERIAL INTERFACE
q QSOP-20 AND SSOP-20 PACKAGES
APPLICATIONS
q DATA ACQUISITION
q TEST AND MEASUREMENT EQUIPMENT
q INDUSTRIAL PROCESS CONTROL
q PERSONAL DIGITAL ASSISTANTS
q BATTERY-POWERED SYSTEMS
DESCRIPTION
The ADS8344 is an 8-channel, 16-bit, sampling
Analog-to-Digital (A/D) converter with a synchronous serial
interface. Typical power dissipation is 10mW at a 100kHz
throughput rate and a +5V supply. The reference voltage
(VREF) can be varied between 500mV and VCC, providing a
corresponding input voltage range of 0V to VREF. The
device includes a shutdown mode that reduces power dissi-
pation to under 15µW. The ADS8344 is tested down to 2.7V
operation.
Low power, high speed, and an on-board multiplexer make
the ADS8344 ideal for battery-operated systems such as
personal digital assistants, portable multi-channel data log-
gers, and measurement equipment. The serial interface also
provides low-cost isolation for remote data acquisition. The
ADS8344 is available in a QSOP-20 or SSOP-20 package
and is ensured over the –40°C to +85°C temperature range.
CH0
CH1
CH2
CH3
COM
ADS8341
ADS8343
4-Channel
Multiplexer
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
VREF
ADS8344
ADS8345
8-Channel
Multiplexer
SAR
CDAC
Comparator
Serial
Interface
and
Control
DCLK
CS
SHDN
DIN
DOUT
BUSY
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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2000-2006, Texas Instruments Incorporated



Burr-Brown Corporation ADS8344
ABSOLUTE MAXIMUM RATINGS(1)
+VCC to GND ........................................................................ 0.3V to +6V
Analog Inputs to GND ............................................ 0.3V to +VCC + 0.3V
Digital Inputs to GND ........................................................... 0.3V to +6V
Power Dissipation .......................................................................... 250mW
Maximum Junction Temperature ................................................... +150°C
Operating Temperature Range ........................................ 40°C to +85°C
Storage Temperature Range ......................................... 65°C to +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
NOTE: (1) Stresses above those listed under Absolute Maximum Ratings may
cause permanent damage to the device. Exposure to absolute maximum
conditions for extended periods may affect device reliability.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instruments
recommends that all integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and installation proce-
dures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION(1)
PRODUCT
MINIMUM
RELATIVE
ACCURACY
(LSB)
MAXIMUM
SPECIFIED
GAIN ERROR TEMPERATURE PACKAGE
(%)
RANGE
DESIGNATOR
PACKAGE-LEAD
PACKAGE
DRAWING
NUMBER
ORDERING
NUMBER
TRANSPORT
MEDIA, QUANTITY
ADS8344E
"
ADS8344N
"
ADS8344EB
"
ADS8344NB
"
8
"
"
"
6
"
"
"
±0.05
"
"
"
±0.024
"
"
"
40°C to +85°C
"
"
"
40°C to +85°C
"
"
"
DBQ
"
DB
"
DBQ
"
DB
"
QSOP-20
"
SSOP-20
"
QSOP-20
"
SSOP-20
"
DBQ
"
DB
"
DBQ
"
DB
"
ADS8344E
ADS8344E/2K5
ADS8344N
ADS8344N/1K
ADS8344EB
ADS8344EB/2K5
ADS8344NB
ADS8344NB/1K
Rails, 56
Tape and Reel, 2500
Rails, 68
Tape and Reel, 1000
Rails, 56
Tape and Reel, 2500
Rails, 68
Tape and Reel, 1000
NOTE: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this data sheet, or see the TI web site at
www.ti.com.
PIN CONFIGURATION
Top View
SSOP
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
COM 9
SHDN 10
ADS8344
20 +VCC
19 DCLK
18 CS
17 DIN
16 BUSY
15 DOUT
14 GND
13 GND
12 +VCC
11 VREF
PIN DESCRIPTIONS
PIN NAME DESCRIPTION
1 CH0 Analog Input Channel 0
2 CH1 Analog Input Channel 1
3 CH2 Analog Input Channel 2
4 CH3 Analog Input Channel 3
5 CH4 Analog Input Channel 4
6 CH5 Analog Input Channel 5
7 CH6 Analog Input Channel 6
8 CH7 Analog Input Channel 7
9 COM Ground reference for analog inputs. Sets zero code
voltage in singleended mode. Connect this pin to ground
or ground reference point.
10 SHDN Shutdown. When LOW, the device enters a very
low-power shutdown mode.
11 VREF Voltage Reference Input. See Electrical Characteristics
Table for ranges.
12 +VCC Power Supply, 2.7V to 5V
13 GND Ground
14 GND Ground
15 DOUT Serial Data Output. Data is shifted on the falling edge of
DCLK. This output is high impedance when CS is HIGH.
16 BUSY Busy Output. Busy goes LOW when the DIN control bits
are being read and also when the device is converting.
The Output is high impedance when CS is HIGH.
17 DIN Serial Data Input. If CS is LOW, data is latched on rising
edge of DCLK.
18 CS Chip Select Input. Active LOW. Data will not be clocked
into DIN unless CS is LOW. When CS is HIGH, DOUT is
high impedance.
19 DCLK External Clock Input. The clock speed determines the
conversion rate by the equation fDCLK = 24 fSAMPLE.
20 +VCC Power Supply
2 ADS8344
SBAS139E



Burr-Brown Corporation ADS8344
ELECTRICAL CHARACTERISTICS: +5V
At TA = 40°C to +85°C, +VCC = +5V, VREF = +5V, fSAMPLE = 100kHz, and fCLK = 24 fSAMPLE = 2.4MHz, unless otherwise noted.
ADS8344E, N
ADS8344EB, NB
PARAMETER
CONDITIONS
MIN
TYP MAX MIN
TYP
MAX
UNITS
RESOLUTION
16 BITS
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
Positive Input - Negative Input
Positive Input
Negative Input
0
0.2
0.2
VREF
+VCC + 0.2
+1.25
25
±1
V
V
V
pF
µA
SYSTEM PERFORMANCE
No Missing Codes
Integral Linearity Error
Offset Error
Offset Error Match
Gain Error
Gain Error Match
Noise
Power-Supply Rejection
SAMPLING DYNAMICS
Conversion Time
Acquisition Time
Throughput Rate
Multiplexer Settling Time
Aperture Delay
Aperture Jitter
Internal Clock Frequency
External Clock Frequency
+4.75V < VCC < 5.25V
SHDN = VDD
Data Transfer Only
14
8
±2
1.2 4
±0.05
1.0 4
20
3
4.5
0.024
0
500
30
100
2.4
16
100
2.4
2.4
15
Bits
6 LSB
±1 mV
✻ ✻ LSB(1)
±0.024
%
✻✻
LSB
µVrms
LSB(1)
CLK Cycles
CLK Cycles
kHz
ns
ns
ps
MHz
MHz
MHz
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion(2)
Signal-to-(Noise + Distortion)
SpuriousFree Dynamic Range
Channel-to-Channel Isolation
REFERENCE INPUT
Range
Resistance
Input Current
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
DCLK Static
fSAMPLE = 12.5kHz
DCLK Static
90
86
92
100
0.5
+VCC
5
40 100
✻✻
2.5
0.001
3
✻✻
dB
dB
dB
dB
V
G
µA
µA
µA
DIGITAL INPUT/OUTPUT
Logic Family
Logic Levels
VIH
VIL
VOH
VOL
Data Format
| IIH | +5µA
| IIL | +5µA
IOH = 250µA
IOL = 250µA
CMOS
3.0 5.5
0.3
+0.8
3.5
0.4
Straight Binary
V
V
V
V
POWER-SUPPLY REQUIREMENTS
+VCC
Quiescent Current
Specified Performance
4.75
5.25
1.5 2.0
Power Dissipation
fSAMPLE = 100kHz
Power-Down Mode(3), CS = +VCC
300
3
7.5 10
V
mA
µA
µA
mW
TEMPERATURE RANGE
Specified Performance
40 +85
°C
Same specifications as ADS8344E, N.
NOTES: (1) LSB means Least Significant Bit. With VREF equal to +5.0V, one LSB is 76µV. (2) First nine harmonics of the test frequency. (3) Auto power-down mode
(PD1 = PD0 = 0) active or SHDN = GND.
ADS8344
SBAS139E
3







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