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Burr-Brown Corporation

ADS1213 Datasheet Preview

ADS1213 Datasheet

22-Bit ANALOG-TO-DIGITAL CONVERTER

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® ADS1212
ADS1213
ADS1212
ADS1213
ADS1213
ADS1212
ADS1213
PATENTS PENDING
22-Bit ANALOG-TO-DIGITAL CONVERTER
FEATURES
q DELTA-SIGMA A/D CONVERTER
q 22 BITS NO MISSING CODES
q 20 BITS EFFECTIVE RESOLUTION AT 10Hz
AND 16 BITS AT 1000Hz
q LOW POWER: 1.4mW
q DIFFERENTIAL INPUTS
q PROGRAMMABLE GAIN AMPLIFIER
q SPI COMPATIBLE SSI INTERFACE
q PROGRAMMABLE CUT-OFF FREQUENCY
UP TO 6.25kHz
q INTERNAL/EXTERNAL REFERENCE
q ON CHIP SELF-CALIBRATION
q ADS1213 INCLUDES 4 CHANNEL MUX
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL
q INSTRUMENTATION
q BLOOD ANALYSIS
q SMART TRANSMITTERS
q PORTABLE INSTRUMENTS
q WEIGH SCALES
q PRESSURE TRANSDUCERS
DESCRIPTION
The ADS1212 and ADS1213 are precision, wide
dynamic range, delta-sigma analog-to-digital converters
with 24-bit resolution operating from a single +5V
supply. The differential inputs are ideal for direct
connection to transducers or low level voltage sig-
nals. The delta-sigma architecture is used for wide
dynamic range and to guarantee 22 bits of no missing
code performance. An effective resolution of 20 bits
is achieved through the use of a very low-noise input
amplifier at conversion rates up to 10Hz. Effective
resolutions of 16 bits can be maintained up to a
sample rate of 1kHz through the use of the unique
Turbo modulator mode of operation. The dynamic
range of the converters is further increased by provid-
ing a low-noise programmable gain amplifier with a
gain range of 1 to 16 in binary steps.
The ADS1212 and ADS1213 are designed for high
resolution measurement applications in smart trans-
mitters, industrial process control, weigh scales, chro-
matography and portable instrumentation. Both con-
verters include a flexible synchronous serial interface
which is SPI compatible and also offers a two-wire
control mode for low cost isolation.
The ADS1212 is a single channel converter and is
offered in both 18-pin DIP and 18-lead SOIC pack-
ages. The ADS1213 includes a 4 channel input multi-
plexer and is available in 24-pin DIP, 24-lead SOIC,
and 28-lead SSOP packages.
AGND AVDD REFOUT
REFIN
VBIAS
XIN XOUT
AIN1P
AIN1N
AIN2P
AIN2N
AIN3P
AIN3N
AIN4P
AIN4N
MUX
AINP
AINN
+2.5V
Reference
+3.3V Bias
Generator
Clock Generator
PGA
Second-Order
∆∑
Modulator
Third-Order
Digital Filter
Micro Controller
Instruction Register
Command Register
Data Output Register
Offset Register
Full-Scale Register
Modulator Control
Serial Interface
DGND
DVDD
SCLK
SDIO
SDOUT
ADS1213 Only
ADS1212/13
DSYNC
CS MODE DRDY
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1996 Burr-Brown Corporation
PDS1-1360C
ADS121P2ri,nte1d 2in1U.3S.A. April, 1998
®




Burr-Brown Corporation

ADS1213 Datasheet Preview

ADS1213 Datasheet

22-Bit ANALOG-TO-DIGITAL CONVERTER

No Preview Available !

SPECIFICATIONS
All specifications TMIN to TMAX, AVDD = DVDD = +5V, fXIN = 1MHz, programmable gain amplifier setting of 1, Turbo Mode Rate of 1, REFOUT disabled, VBIAS disabled,
and external 2.5V reference, unless otherwise specified.
PARAMETER
ANALOG INPUT
Input Voltage Range(1)
Input Impedance
Programmable Gain Amplifier
Input Capacitance
Input Leakage Current
SYSTEMS PERFORMANCE
No Missing Codes
Integral Linearity
Unipolar Offset Error(4)
Unipolar Offset Drift(6)
Gain Error(4)
Gain Error Drift(6)
Common-Mode Rejection(9)
Normal-Mode Rejection
Output Noise
Power Supply Rejection
VOLTAGE REFERENCE
Internal Reference (REFOUT)
Drift
Noise
Load Current
Output Impedance
External Reference (REFIN)
Load Current
VBIAS Output
Drift
Load Current
DIGITAL INPUT/OUTPUT
Logic Family
Logic Level: (all except XIN)
VIH
VIL
VOH
VOL
XIN Input Levels: VIH
VIL
XIN Frequency Range (fXIN)
Output Data Rate (fDATA)
Data Format
SYSTEM CALIBRATION
Offset and Full-Scale Limits
VFS – | VOS |
CONDITIONS
ADS1212U, P/ADS1213U, P, E
MIN
TYP
MAX
UNITS
With VBIAS(2)
G = Gain, TMR = Turbo Mode Rate
User Programmable: 1, 2, 4, 8, or 16
At +25°C
TMIN to TMAX
fDATA = 10Hz
fDATA = 60Hz
fDATA = 100Hz, TMR of 4
fDATA = 250Hz, TMR of 8
fDATA = 500Hz, TMR of 16
fDATA = 1000Hz, TMR of 16
fDATA = 60Hz
fDATA = 1000Hz, TMR of 16
At DC, TMIN to TMAX
50Hz, fDATA = 50Hz(7)
60Hz, fDATA = 60Hz(7)
50Hz, fDATA = 50Hz(7)
60Hz, fDATA = 60Hz(7)
DC, 50Hz, and 60Hz
0 +5
–10 +10
20/(G • TMR)(3)
1 16
5
5 50
1
22
19
21
20
20
18
±0.0015
±0.0015
See Note 5
1
See Note 5
4
90 100
160
160
100
100
See Typical Performance Curves
60
Source or Sink
Using Internal Reference
Source or Sink
2.4 2.5 2.6
25
50
1
2
2.0 3.0
2.5
3.15 3.3 3.45
50
10mA
IIH = +5µA
IIL = +5µA
IOH = 2 TTL Loads
IOL = 2 TTL Loads
User Programmable and TMR = 1 to 16
fXIN = 500kHz
fXIN = 2.5MHz
User Programmable
TTL Compatible CMOS
2.0
–0.3
DVDD +0.3
0.8
2.4
0.4
3.5
–0.3
DVDD +0.3
0.8
0.5 2.5
0.96 6,250
0.48
3,125
2.4 15,625
Two’s Complement
or Offset Binary
VFS = Full-Scale Differential Voltage(8) 0.7 • (2 • REFIN)/G
VOS = Offset Differential Voltage(8)
1.3 • (2 • REFIN)/G
V
V
M
pF
pA
nA
Bits
Bits
Bits
Bits
Bits
Bits
%FSR
%FSR
ppm/°C
ppm/°C
dB
dB
dB
dB
dB
dB
V
ppm/°C
µVp-p
mA
V
µA
V
ppm/°C
V
V
V
V
V
V
MHz
Hz
Hz
Hz
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.
®
ADS1212, 1213
2


Part Number ADS1213
Description 22-Bit ANALOG-TO-DIGITAL CONVERTER
Maker Burr-Brown Corporation
Total Page 30 Pages
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