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MAX1080 fiches techniques PDF

Maxim Integrated - 300ksps/400ksps / Single-Supply / Low-Power / 8-Channel / Serial 10-Bit ADCs with Internal Reference

Numéro de référence MAX1080
Description 300ksps/400ksps / Single-Supply / Low-Power / 8-Channel / Serial 10-Bit ADCs with Internal Reference
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX1080 fiche technique
19-1685; Rev 0; 5/00
300ksps/400ksps, Single-Supply, Low-Power,
8-Channel, Serial 10-Bit ADCs with Internal Reference
General Description
The MAX1080/MAX1081 10-bit analog-to-digital convert-
ers (ADCs) combine an 8-channel analog-input multiplex-
er, high-bandwidth track/hold (T/H), and serial interface
with high conversion speed and low power consumption.
The MAX1080 operates from a single +4.5V to +5.5V sup-
ply; the MAX1081 operates from a single +2.7V to +3.6V
supply. Both devices’ analog inputs are software config-
urable for unipolar/bipolar and single-ended/pseudo-dif-
ferential 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 MAX1080/
MAX1081 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 VDD1 range may
also be used.
The MAX1080/MAX1081 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 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. This technique can cut supply current below 100mA
at lower sampling rates.
The MAX1080/MAX1081 are available in a 20-pin TSSOP
package. These devices are higher-speed versions of the
MAX148/MAX149. For more information, refer to the
respective data sheet.
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
Typical Operating Circuit appears at end of data sheet.
Features
o 8-Channel Single-Ended or 4-Channel
Pseudo-Differential Inputs
o Internal Multiplexer and Track/Hold
o Single-Supply Operation
+4.5V to +5.5V (MAX1080)
+2.7V to +3.6V (MAX1081)
o Internal +2.5V Reference
o 400ksps Sampling Rate (MAX1080)
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 20-Pin TSSOP Package
Ordering Information
PART
TEMP.
RANGE
PIN-
PACKAGE
INL
(LSB)
MAX1080ACUP 0°C to +70°C 20 TSSOP
±1/2
MAX1080BCUP 0°C to +70°C 20 TSSOP
±1
MAX1080AEUP -40°C to +85°C 20 TSSOP
±1/2
Ordering Information continued at end of data sheet.
Pin Configuration
TOP VIEW
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
COM 9
SHDN 10
MAX1080
MAX1081
20 VDD1
19 VDD2
18 SCLK
17 CS
16 DIN
15 SSTRB
14 DOUT
13 GND
12 REFADJ
11 REF
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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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