MAX1285BCSA Maxim, MAX1285BCSA Datasheet
MAX1285BCSA
Manufacturer Part Number
MAX1285BCSA
Description
400ksps/300ksps / Single-Supply / Low-Power / Serial 12-Bit ADCs with Internal Reference
Manufacturer
Maxim
Datasheet
1.MAX1285BCSA.pdf
(15 pages)
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The MAX1284/MAX1285 12-bit analog-to-digital con-
verters (ADCs) combine a high-bandwidth track/hold
(T/H), a serial interface with high conversion speed, an
internal +2.5V reference, and low power consumption.
The MAX1284 operates from a single +4.5V to +5.5V
supply. The MAX1285 operates from a single +2.7V to
+3.6V supply.
The 3-wire serial interface connects directly to
SPI™/QSPI™/ MICROWIRE™ devices without external
logic. The devices use an external serial-interface clock
to perform successive-approximation analog-to-digital
conversions.
Low power, ease of use, and small package size make
these converters ideal for remote-sensor and data-acqui-
sition applications or for other circuits with demanding
power consumption and space requirements. The
MAX1284/MAX1285 are available in 8-pin SO packages.
These devices are pin-compatible, higher-speed ver-
sions of the MAX1240/MAX1241. Refer to the respec-
tive data sheets for more information.
19-1687; Rev 1; 7/00
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
TOP VIEW
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
400ksps/300ksps, Single-Supply, Low-Power,
Serial 12-Bit ADCs with Internal Reference
SHDN
V
REF
AIN
DD
________________________________________________________________ Maxim Integrated Products
1
2
3
4
General Description
MAX1284
MAX1285
SO
Pin Configuration
Applications
8
7
6
5
SCLK
CS
DOUT
GND
o Single-Supply Operation
o ±1LSB (max) DNL, ±1LSB (max) INL
o 400ksps Sampling Rate (MAX1284)
o Internal Track/Hold
o +2.5V Internal Reference
o Low Power: 2.5mA (400ksps)
o SPI/QSPI/MICROWIRE 3-Wire Serial-Interface
o Pin-Compatible, High-Speed Upgrades to
o 8-Pin SO Package
____________________________Features
*Future product—contact factory for availability.
MAX1284BCSA
MAX1284BESA* -40°C to +85°C 8 SO
MAX1285BCSA
MAX1285BESA
SCLK
SHDN
REF
MAX1240/MAX1241
AIN
CS
PART
+4.5V to +5.5V (MAX1284)
+2.7V to +3.6V (MAX1285)
7
8
3
2
4
+2.5V REFERENCE
CONTROL
-40°C to +85°C 8 SO
LOGIC
0°C to +70°C
0°C to +70°C
T/H
RANGE
TEMP.
Ordering Information
Functional Diagram
GND
5
V
12-BIT
DD
SAR
1
CLOCK
PACKAGE
8 SO
8 SO
INT
PIN-
MAX1284
MAX1285
REGISTER
OUTPUT
SHIFT
VOLTAGE (V)
2.7 to 3.6
2.7 to 3.6
SUPPLY
5
5
6
DOUT
1
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