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MAX145 fiches techniques PDF

Maxim Integrated - 0.1%-Accurate Signal Conditioner for Piezoresistive Sensor Compensation

Numéro de référence MAX145
Description 0.1%-Accurate Signal Conditioner for Piezoresistive Sensor Compensation
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX145 fiche technique
19-1387; Rev 0; 11/98
+2.7V, Low-Power, 2-Channel, 108ksps,
Serial 12-Bit ADCs in 8-Pin µMAX
General Description
The MAX144/MAX145 low-power, 12-bit analog-to-
digital converters (ADCs) are available in 8-pin µMAX
and DIP packages. Both devices operate with a single
+2.7V to +5.25V supply and feature a 7.4µs succes-
sive-approximation ADC, automatic power-down, fast
wake-up (2.5µs), an on-chip clock, and a high-speed,
3-wire serial interface.
Power consumption is only 3.2mW (VDD = +3.6V) at the
maximum sampling rate of 108ksps. At slower through-
put rates, the automatic shutdown (0.2µA) further
reduces power consumption.
The MAX144 provides 2-channel, single-ended opera-
tion and accepts input signals from 0 to VREF. The
MAX145 accepts pseudo-differential inputs ranging
from 0 to VREF. An external clock accesses data-
through the 3-wire serial interface, which is SPI™,
QSPI™, and MICROWIRE™-compatible.
Excellent dynamic performance and low power, com-
bined with ease of use and small package size, make
these converters ideal for battery-powered and data-
acquisition applications, or for other circuits with
demanding power-consumption and space require-
ments. For pin-compatible 10-bit ADCs, see the
MAX157 and MAX159.
Battery-Powered Systems
Portable Data Logging
Isolated Data Acquisition
Process-Control Monitoring
Applications
Instrumentation
Test Equipment
Medical Instruments
System Supervision
TOP VIEW
Pin Configuration
VDD 1
CH0 (CH+) 2
CH1 (CH-) 3
GND 4
MAX144
MAX145
8 SCLK
7 DOUT
6 CS/SHDN
5 REF
( ) ARE FOR MAX145 ONLY µMAX/DIP
Features
o Single-Supply Operation (+2.7V to +5.25V)
o Two Single-Ended Channels (MAX144)
One Pseudo-Differential Channel (MAX145)
o Low Power
0.9mA (108ksps, +3V Supply)
100µA (10ksps, +3V Supply)
10µA (1ksps, +3V Supply)
0.2µA (Power-Down Mode)
o Internal Track/Hold
o 108ksps Sampling Rate
o SPI/QSPI/MICROWIRE-Compatible 3-Wire
Serial Interface
o Space-Saving 8-Pin µMAX Package
o Pin-Compatible 10-Bit Versions Available
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX144ACUA 0°C to +70°C 8 µMAX
MAX144BCUA 0°C to +70°C 8 µMAX
MAX144ACPA 0°C to +70°C 8 Plastic DIP
MAX144BCPA 0°C to +70°C 8 Plastic DIP
MAX144BC/D 0°C to +70°C Dice*
MAX144AEUA -40°C to +85°C 8 µMAX
MAX144BEUA -40°C to +85°C 8 µMAX
MAX144AEPA -40°C to +85°C 8 Plastic DIP
MAX144BEPA -40°C to +85°C 8 Plastic DIP
MAX144AMJA -55°C to +125°C 8 CERDIP**
MAX144BMJA -55°C to +125°C 8 CERDIP**
MAX145ACUA 0°C to +70°C 8 µMAX
MAX145BCUA 0°C to +70°C 8 µMAX
MAX145ACPA 0°C to +70°C 8 Plastic DIP
MAX145BCPA 0°C to +70°C 8 Plastic DIP
MAX145BC/D 0°C to +70°C Dice*
MAX145AEUA -40°C to +85°C 8 µMAX
MAX145BEUA -40°C to +85°C 8 µMAX
MAX145AEPA -40°C to +85°C 8 Plastic DIP
MAX145BEPA -40°C to +85°C 8 Plastic DIP
MAX145AMJA -55°C to +125°C 8 CERDIP**
MAX145BMJA -55°C to +125°C 8 CERDIP**
INL
(LSB)
±0.5
±1
±0.5
±1
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±1
±0.5
±1
±0.5
±1
±0.5
±1
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
*Dice are specified at TA = +25°C, DC parameters only.
**Contact factory for availability.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.

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