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ADS1286A Schematic ( PDF Datasheet ) - Burr-Brown Corporation

Teilenummer ADS1286A
Beschreibung 12-Bit Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER
Hersteller Burr-Brown Corporation
Logo Burr-Brown Corporation Logo 




Gesamt 11 Seiten
ADS1286A Datasheet, Funktion
® ADS1286
ADS1286
ADS1286
12-Bit Micro Power Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q SERIAL INTERFACE
q GUARANTEED NO MISSING CODES
q 20kHz SAMPLING RATE
q LOW SUPPLY CURRENT: 250µA
APPLICATIONS
q REMOTE DATA ACQUISITION
q ISOLATED DATA ACQUISITION
q TRANSDUCER INTERFACE
q BATTERY OPERATED SYSTEMS
DESCRIPTION
The ADS1286 is a 12-bit, 20kHz analog-to-digital
converter with a differential input and sample and hold
amplifier and consumes only 250µA of supply cur-
rent. The ADS1286 offers an SPI and SSI compatible
serial interface for communications over a two or three
wire interface. The combination of a serial two wire
interface and micropower consumption makes the
ADS1286 ideal for remote applications and for those
requiring isolation.
The ADS1286 is available in a 8-pin plastic mini DIP
and a 8-lead SOIC.
VREF
+In
–In
S/H Amp
SAR
CDAC
Comparator
Control
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
©1996 Burr-Brown Corporation
PDS-1335B
Printed in U.S.A. October, 1998






ADS1286A Datasheet, Funktion
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25, VCC = +5V, VREF = +5V, fSAMPLE = 12.5kHz, fCLK = 16 • fSAMPLE, unless otherwise specified.
0
–25
–50
–75
–100
–125
0
4096 POINT FFT
24
Frequency (kHz)
6
PEAK-TO-PEAK NOISE vs REFERENCE VOLTAGE
10
9
8
7
6
5
4
3
2
1
0
0.1
1
Reference Voltage (V)
10
POWER SUPPLY REJECTION vs RIPPLE FREQUENCY
0
–10
VRIPPLE = 20mV
–20
–30
–40
–50
–60
–70
–80
–90
1
10 100 1000
Ripple Frequency (kHz)
10000
3
2.5
2
1.5
1
0.5
0
–55
POWER DOWN SUPPLY CURRENT
vs TEMPERATURE
–40 –25
0
25
Temperature (°C)
70
85
0.15
0.1
0.05
0
–0.05
–0.1
–0.15
–55
CHANGE GAIN vs TEMPERATURE
–40 –25
0
25
Temperature (°C)
70
85
400
350
300
250
200
150
100
–55
SUPPLY CURRENT vs TEMPERATURE
fSAMPLE = 12.5kHz
fSAMPLE = 1.6kHz
–40 –25
0
25
Temperature (°C)
70
85
®
ADS1286
6

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