ADS1211E 반도체 회로 부품 판매점
24-Bit ANALOG-TO-DIGITAL CONVERTER
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 Burr-Brown Corporation |
® ADS1210
ADS1211
ADS1210
ADS1211
ADS1211
ADS1210
ADS1211
24-Bit ANALOG-TO-DIGITAL CONVERTER
FEATURES
q DELTA-SIGMA A/D CONVERTER
q 23 BITS EFFECTIVE RESOLUTION AT 10Hz
AND 20 BITS AT 1000Hz
q DIFFERENTIAL INPUTS
q PROGRAMMABLE GAIN AMPLIFIER
q FLEXIBLE SPI COMPATIBLE SSI
INTERFACE WITH 2-WIRE MODE
q PROGRAMMABLE CUT-OFF FREQUENCY
UP TO 15.6kHz
q INTERNAL/EXTERNAL REFERENCE
q ON CHIP SELF-CALIBRATION
q ADS1211 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 ADS1210 and ADS1211 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 23 bits
is achieved through the use of a very low-noise input
amplifier at conversion rates up to 10Hz. Effective
resolutions of 20 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 ADS1210 and ADS1211 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 ADS1210 is a single channel converter and is
offered in both 18-pin DIP and 18-lead SOIC pack-
ages. The ADS1211 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
ADS1211 Only
ADS1210/11
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/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1996 Burr-Brown Corporation
PDS1-1284E
ADS1210Pr,int1ed2in1U1.S.A. May, 2000
®
SPECIFICATIONS
All specifications TMIN to TMAX, AVDD = DVDD = +5V, fXIN = 10MHz, 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
Resolution
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
ADS1210U, P/ADS1211U, 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
At TMIN to TMAX
fDATA = 60Hz
fDATA = 60Hz
fDATA = 1000Hz, TMR of 16
At DC, +25°C
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
4/(G • TMR)(3)
1 16
8
5 50
1
24
22
±0.0015
±0.0015
See Note 5
1
See Note 5
1
100 115
90 115
160
160
100
100
See Typical Performance Curves
65
Source or Sink
Using Internal Reference
Source or Sink
2.4
2.0
3.15
2.5 2.6
25
50
1
2
3.0
2.5
3.3 3.45
50
10mA
IIH = +5µA
IIL = +5µA
IOH = 2 TTL Loads
IOL = 2 TTL Loads
User Programmable
fXIN = 500kHz
User Programmable
2.0
–0.3
2.4
3.5
–0.3
0.5
2.4
0.12
TTL Compatible CMOS
DVDD +0.3
0.8
Two’s Complement
or Offset Binary
0.4
DVDD +0.3
0.8
10
15,625
781
VFS = Full-Scale Differential Voltage(8) 0.7 • (2 • REFIN)/G
VOS = Offset Differential Voltage(8)
1.3 • (2 • REFIN)/G
V
V
MΩ
pF
pA
nA
Bits
Bits
%FSR
%FSR
µV/°C
µV/°C
dB
dB
dB
dB
dB
dB
dB
V
ppm/°C
µVp-p
mA
Ω
V
µA
V
ppm/°C
V
V
V
V
V
V
MHz
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.
®
ADS1210, 1211
2
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ADS1211E converter
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