MAX1084 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – 400ksps/300ksps, Single-Supply, Low-Power, Serial 10-Bit ADCs with Internal Reference

19-1686; Rev 0; 5/00
400ksps/300ksps, Single-Supply, Low-Power,
Serial 10-Bit ADCs with Internal Reference
General Description
The MAX1084/MAX1085 10-bit analog-to-digital convert-
ers (ADCs) combine a high-bandwidth track/hold, a serial
interface with high conversion speed, an internal +2.5V
reference, and low power consumption. The MAX1084
operates from a single +4.5V to +5.5V supply; the
MAX1085 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 con-
versions.
Low power combined with ease of use and small pack-
age size make these converters ideal for remote-sensor
and data-acquisition applications, or for other circuits with
demanding power consumption and space requirements.
The MAX1084/MAX1085 are available in 8-pin SO
packages.
These devices are pin-compatible, higher-speed versions
of the MAX1242/MAX1243; for more information, refer to
the respective data sheets.
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
Features
o Single-Supply Operation
+4.5V to +5.5V (MAX1084)
+2.7V to +3.6V (MAX1085)
o 10-Bit Resolution
o 400ksps Sampling Rate (MAX1084)
o Internal Track/Hold
o Internal +2.5V Reference
o Low Power: 2.5mA (400ksps)
o SPI/QSPI/MICROWIRE 3-Wire Serial Interface
o Pin-Compatible, High-Speed Upgrade to
MAX1242/MAX1243
o 8-Pin SO Package
Ordering Information
PART
MAX1084ACSA
MAX1084BCSA
MAX1084AESA
MAX1084BESA
MAX1085ACSA
MAX1085BCSA
MAX1085AESA
MAX1085BESA
TEMP.
RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
INL
(LSB)
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
Pin Configuration
Functional Diagram
TOP VIEW
V_{DD 1}
AIN 2
SHDN 3
REF 4
MAX1084
MAX1085
8 SCLK
7 CS
6 DOUT
5 GND
SO
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
CS ⁷
SCLK ⁸
SHDN ³
AIN ²
4
REF
V_DD
1
CONTROL
LOGIC
T/H
2.5V
REFERENCE
INT
CLOCK
10-BIT
SAR
OUTPUT
SHIFT
REGISTER
6
DOUT
MAX1084
MAX1085
5
GND
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