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Burr-Brown Corporation

ADS7841 Datasheet Preview

ADS7841 Datasheet

12-Bit/ 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER

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®
ADS7841
ADS7841
ADS7841
12-Bit, 4-Channel Serial Output Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q SINGLE SUPPLY: 2.7V to 5V
q 4-CHANNEL SINGLE-ENDED OR
2-CHANNEL DIFFERENTIAL INPUT
q UP TO 200kHz CONVERSION RATE
q ±1 LSB MAX INL AND DNL
q GUARANTEED NO MISSING CODES
q 72dB SINAD
q SERIAL INTERFACE
q 16-PIN PDIP OR 16-LEAD SSOP PACKAGE
q ALTERNATE SOURCE FOR MAX1247
APPLICATIONS
q DATA ACQUISITION
q TEST AND MEASUREMENT
q INDUSTRIAL PROCESS CONTROL
q PERSONAL DIGITAL ASSISTANTS
q BATTERY-POWERED SYSTEMS
DESCRIPTION
The ADS7841 is a 4-channel, 12-bit sampling analog-
to-digital converter (ADC) with a synchronous serial
interface. The resolution is programmable to either 8
or 12 bits. Typical power dissipation is 2mW at a
200kHz throughput rate and a +5V supply. The refer-
ence voltage (VREF) can be varied between 100mV and
VCC, providing a corresponding input voltage range of
0V to VREF. The device includes a shutdown mode
which reduces power dissipation to under 15µW. The
ADS7841 is guaranteed down to 2.7V operation.
Low power, high speed, and on-board multiplexer
make the ADS7841 ideal for battery operated systems
such as personal digital assistants, portable multi-
channel data loggers, and measurement equipment.
The serial interface also provides low-cost isolation
for remote data acquisition. The ADS7841 is available
in a 16-pin PDIP or a 16-lead SSOP package and is
guaranteed over the –40°C to +85°C temperature range.
CH0
CH1
CH2
CH3
COM
VREF
Four
Channel
Multiplexer
SAR
CDAC
Comparator
Serial
Interface
and
Control
DCLK
CS
SHDN
DIN
DOUT
MODE
BUSY
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
©1998 Burr-Brown Corporation
PDS-1420B
Printed in U.S.A. June, 1998




Burr-Brown Corporation

ADS7841 Datasheet Preview

ADS7841 Datasheet

12-Bit/ 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER

No Preview Available !

SPECIFICATION: +5V
At TA = –40°C to +85°C, +VCC = +5V, VREF = +5V, fSAMPLE = 200kHz, and fCLK = 16 • fSAMPLE = 3.2MHz, unless otherwise noted.
PARAMETER
CONDITIONS
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
SYSTEM PERFORMANCE
Resolution
No Missing Codes
Integral Linearity Error
Differential 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
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion(2)
Signal-to-(Noise + Distortion)
Spurious Free Dynamic Range
Channel-to-Channel Isolation
REFERENCE INPUT
Range
Resistance
Input Current
DIGITAL INPUT/OUTPUT
Logic Family
Logic Levels
VIH
VIL
VOH
VOL
Data Format
POWER SUPPLY REQUIREMENTS
+VCC
Quiescent Current
Power Dissipation
TEMPERATURE RANGE
Specified Performance
Positive Input - Negative Input
Positive Input
Negative Input
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 50kHz
DCLK Static
fSAMPLE = 12.5kHz
DCLK Static
| IIH | +5µA
| IIL | +5µA
IOH = –250µA
IOL = 250µA
Specified Performance
fSAMPLE = 12.5kHz
Power-Down Mode(3), CS = +VCC
ADS7841E, P
MIN
TYP
MAX
ADS7841EB, PB
MIN TYP MAX
0
–0.2
–0.2
VREF
+VCC +0.2
+1.25
25
±1
T
T
T
12
12
±2
±0.8
±3
0.15
1.0
±4
0.1 1.0
30
70
12
12
3T
200
500
30
100
–78 –72
68 71
70
72 79
76
120
0.1 +VCC
5
40 100
2.5
0.001
3
T
CMOS
3.0
–0.3
3.5
Straight Binary
5.5
+0.8
0.4
T
T
T
4.75
5.25
550 900
300
3
4.5
T
–40 +85 T
T
T
T
T
T
T
±1
±0.5 ±1
T
TT
±3
TT
T
T
T
T
T
T
T
–80 –76
72
81
T
T
T
TT
T
TT
T
T
T
T
T
T
T
T
T
T
T
UNITS
V
V
V
pF
µA
Bits
Bits
LSB(1)
LSB
LSB
LSB
LSB
LSB
µVrms
dB
Clk Cycles
Clk Cycles
kHz
ns
ns
ps
dB
dB
dB
dB
V
G
µA
µA
µA
V
V
V
V
V
µA
µA
µA
mW
°C
T Same specifications as ADS7841E, P.
NOTE: (1) LSB means Least Significant Bit. With VREF equal to +5.0V, one LSB is 1.22mV. (2) First five harmonics of the test frequency. (3) Auto power-down mode
(PD1 = PD0 = 0) active or SHDN = GND.
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.
®
ADS7841
2


Part Number ADS7841
Description 12-Bit/ 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER
Maker Burr-Brown Corporation
Total Page 14 Pages
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