19-1690 Rev 0; 5/00
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 10-Bit ADCs with Internal Reference
General Description
The MAX1082/MAX1083 10-bit analog-to-digital convert-
ers (ADCs) combine a 4-channel analog-input multiplexer,
high-bandwidth track/hold (T/H), and serial interface with
high conversion speed and low power consumption. The
MAX1082 operates from a single +4.5V to +5.5V supply;
the MAX1083 operates from a single +2.7V to +3.6V sup-
ply. Both devices’ analog inputs are software configurable
for unipolar/bipolar and single-ended/pseudo-differential
operation.
The 4-wire serial interface connects directly to SPI™/QSPI™
and MICROWIRE™ devices without external logic. A serial
strobe output allows direct connection to TMS320-family
digital signal processors. The MAX1082/ MAX1083 use an
external serial-interface clock to perform successive-
approximation analog-to-digital conversions. The devices
feature an internal +2.5V reference and a reference-buffer
amplifier with a ±1.5% voltage-adjustment range. An
external reference with a 1V to V
DD
range may also be
used.
The MAX1082/MAX1083 provide a hard-wired
SHDN
pin
and four software-selectable power modes (normal opera-
tion, reduced power (REDP), fast power-down (FASTPD),
and full power-down (FULLPD)). These devices can be
programmed to shut down automatically at the end of a
conversion or to operate with reduced power. When using
the power-down modes, accessing the serial interface
automatically powers up the devices, and the quick turn-
on time allows them to be shut down between all conver-
sions.
The MAX1082/MAX1083 are available in 16-pin TSSOP
packages.
Features
o
4-Channel Single-Ended or 2-Channel
Pseudo-Differential Inputs
o
Internal Multiplexer and Track/Hold
o
Single-Supply Operation
+4.5V to +5.5V (MAX1082)
+2.7V to +3.6V (MAX1083)
o
Internal +2.5V Reference
o
400kHz Sampling Rate (MAX1082)
o
Low Power: 2.5mA (400ksps)
1.3mA (REDP)
0.9mA (FASTPD)
2µA (FULLPD)
o
SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire
Serial Interface
o
Software-Configurable Unipolar or Bipolar Inputs
o
16-Pin TSSOP Package
MAX1082/MAX1083
Ordering Information
PART
MAX1082ACUE
MAX1082BCUE
MAX1082AEUE
TEMP.
RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
PIN-
PACKAGE
16 TSSOP
16 TSSOP
16 TSSOP
INL
(LSB)
±1/2
±1
±1/2
Ordering Information continued at end of data sheet.
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
V
DD1
1
CH0 2
CH1 3
CH2 4
CH3 5
COM 6
SHDN 7
Pin Configuration
TOP VIEW
16 V
DD2
15 SCLK
14 CS
MAX1082
MAX1083
13 DIN
12 SSTRB
11 DOUT
10 GND
9
REFADJ
Typical Operating Circuit appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
REF 8
TSSOP
________________________________________________________________
Maxim Integrated Products
1
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