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Burr-Brown Corporation

ADS8321 Datasheet Preview

ADS8321 Datasheet

16-Bit/ High Speed/ MicroPower Sampling ANALOG-TO-DIGITAL CONVERTER

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® ADS8321
For most current data sheet and other product
information, visit www.burr-brown.com
16-Bit, High Speed, MicroPower Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q BIPOLAR INPUT RANGE
q 100kHz SAMPLING RATE
q MICRO POWER:
4.5mW at 100kHz
1mW at 10kHz
q POWER DOWN: 3µA max
q 8-LEAD MSOP PACKAGE
q PIN-COMPATIBLE TO ADS7816 AND
ADS7822
q SERIAL (SPI/SSI) INTERFACE
APPLICATIONS
q BATTERY OPERATED SYSTEMS
q REMOTE DATA ACQUISITION
q ISOLATED DATA ACQUISITION
q SIMULTANEOUS SAMPLING,
MULTI-CHANNEL SYSTEMS
q INDUSTRIAL CONTROLS
q ROBOTICS
q VIBRATION ANALYSIS
DESCRIPTION
The ADS8321 is a 16-bit sampling analog-to-digital
converter with guaranteed specifications over a 4.75V
to 5.25V supply range. It requires very little power
even when operating at the full 100kHz data rate. At
lower data rates, the high speed of the device enables
it to spend most of its time in the power-down mode—
the average power dissipation is less than 1mW at
10kHz data rate.
The ADS8321 also features a synchronous serial
(SPI/SSI compatible) interface, and a differential in-
put. The reference voltage can be set to any level
within the range of 500mV to 2.5V.
Ultra-low power and small size make the ADS8321
ideal for portable and battery-operated systems. It is
also a perfect fit for remote data acquisition mod-
ules, simultaneous multi-channel systems, and iso-
lated data acquisition. The ADS8321 is available in
an 8-lead MSOP package.
VREF
+In
–In
SAR
ADS8321
S/H Amp
CDAC
Comparator
Serial
Interface
DOUT
DCLOCK
CS/SHDN
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1999 Burr-Brown Corporation
PDS-1537A
Printed in U.S.A. Setpember, 1999




Burr-Brown Corporation

ADS8321 Datasheet Preview

ADS8321 Datasheet

16-Bit/ High Speed/ MicroPower Sampling ANALOG-TO-DIGITAL CONVERTER

No Preview Available !

SPECIFICATIONS: +VCC = +5V
At –40°C to +85°C, VREF = +2.5V, –In = 2.5V, fSAMPLE = 100kHz, and fCLK = 24 • fSAMPLE, unless otherwise specified.
ADS8321E
ADS8321EB
PARAMETER
CONDITIONS
MIN TYP MAX MIN TYP MAX UNITS
RESOLUTION
16 T Bits
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
+In – (–In)
+In
–In
–VREF
–0.1
–0.1
+VREF
VCC + 0.1
+4.0
T
T
T
TV
TV
TV
25 T pF
1 T nA
SYSTEM PERFORMANCE
No Missing Codes
Integral Linearity Error
Offset Error
Offset Temperature Drift
Gain Error, Positive
Negative
Gain Temperature Drift
Noise
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
SAMPLING DYNAMICS
Conversion Time
Acquisition Time
Throughput Rate
Clock Frequency Range
+4.7V < VCC < 5.25V
14 15 Bits
±0.008 ±0.018
±0.006 ±0.012 % of FSR
±0.4
±2
±0.2
±1
mV
±1 T µV/°C
±0.05
±0.024
%
±0.05
±0.024
%
±0.3
T ppm/°C
60 T µVrms
80 T dB
3 T LSB(1)
4.5
0.024
16
T
100
2.9 T
T Clk Cycles
Clk Cycles
T kHz
T MHz
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion
SINAD
Spurious Free Dynamic Range
SNR
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
–84
82
84
85
–86 dB
84 dB
86 dB
87 dB
REFERENCE INPUT
Voltage Range
Resistance
Current Drain
DIGITAL INPUT/OUTPUT
Logic Family
Logic Levels:
VIH
VIL
VOH
VOL
Data Format
CS = GND, fSAMPLE = 0Hz
CS = VCC
fSAMPLE = 10kHz
CS = VCC
0.5
VCC/2
T
TV
5 T G
5 T G
40 80
T T µA
0.8 T µA
0.1 3 T µA
CMOS
T
IIH = +5µA
IIL = +5µA
IOH = –250µA
IOL = 250µA
3.0
–0.3
VCC + 0.3
0.8
4.0
0.4
Binary Two’s Complement
T
T
T
T
T
T
T
V
V
V
V
POWER SUPPLY REQUIREMENTS
VCC
VCC Range(2)
Quiescent Current
Power Dissipation
Power Down
TEMPERATURE RANGE
Specified Performance
Specified Performance
fSAMPLE = 10kHz(3, 4)
CS = VCC
4.75
5.25
T
TV
2.7
5.25
T
TV
1100 1700
T T µA
250 T µA
5.5 8.5
T T mW
0.3 3
T T µA
–40 +85 T
T °C
T Specifications same as grade to the left.
NOTES: (1) LSB means Least Significant Bit. (2) See Typical Performance Curves for more information. (3) fCLK = 2.4MHz, CS = VCC for 216 clock cycles out
of every 240. (4) See the Power Dissipation section for more information regarding lower sample rates.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
®
ADS8321
2


Part Number ADS8321
Description 16-Bit/ High Speed/ MicroPower Sampling ANALOG-TO-DIGITAL CONVERTER
Maker Burr-Brown Corporation
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ADS8321 Datasheet PDF






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