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Maxim Integrated - Serial 12-Bit ADCs

Numéro de référence MAX1282
Description Serial 12-Bit ADCs
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX1282 fiche technique
19-1688; Rev 0; 5/00
EVAALVUAAILTAIOBNLEKIT
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
General Description
The MAX1282/MAX1283 12-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
MAX1282 operates from a single +4.5V to +5.5V supply;
the MAX1283 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™/MICROWIRE™ devices without external
logic. A serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX1282/
MAX1283 use an external serial-interface clock to perform
successive-approximation analog-to-digital conversions.
The devices feature an internal +2.5V reference and a ref-
erence-buffer amplifier with a ±1.5% voltage-adjustment
range. An external reference with a 1V to VDD range may
also be used.
The MAX1282/MAX1283 provide a hardwired 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 automatically shut down 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 MAX1282/MAX1283 are available in 16-pin TSSOP
packages.
Features
4-Channel Single-Ended or 2-Channel
Pseudo-Differential Inputs
Internal Multiplexer and Track/Hold
Single-Supply Operation
+4.5V to +5.5V (MAX1282)
+2.7V to +3.6V (MAX1283)
Internal +2.5V Reference
400kHz Sampling Rate (MAX1282)
Low Power: 2.5mA (400ksps)
1.3mA (REDP)
0.9mA (FASTPD)
2µA (FULLPD)
SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire
Serial Interface
Software-Configurable Unipolar or Bipolar Inputs
16-Pin TSSOP Package
Ordering Information
PART
TEMP.
RANGE
MAX1282BCUE
MAX1282BEUE
MAX1283BCUE
MAX1283BEUE
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
PIN-
PACKAGE
16 TSSOP
16 TSSOP
16 TSSOP
16 TSSOP
INL
(LSB)
±1
±1
±1
±1
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
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.
Pin Configuration
TOP VIEW
VDD1 1
CH0 2
CH1 3
CH2 4
CH3 5
COM 6
SHDN 7
REF 8
MAX1282/
MAX1283
16 VDD2
15 SCLK
14 CS
13 DIN
12 SSTRB
11 DOUT
10 GND
9 REFADJ
TSSOP
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.

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