MAX1242 Maxim, MAX1242 Datasheet
MAX1242
Manufacturer Part Number
MAX1242
Description
+2.7V to %.25V / Low-Power / 10-Bit Serial ADCs in SO-8
Manufacturer
Maxim
Datasheet
1.MAX1242.pdf
(12 pages)
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The MAX1242/MAX1243 are low-power, 10-bit analog-
to-digital converters (ADCs) available in 8-pin pack-
ages. They operate with a single +2.7V to +5.25V
supply and feature a 7.5µs successive-approximation
ADC, a fast track/hold (1.5µs), an on-chip clock, and a
high-speed, 3-wire serial interface.
Power consumption is only 3mW (V
73ksps maximum sampling speed. A 2µA shutdown
mode reduces power at slower throughput rates.
The MAX1242 has an internal 2.5V reference, while the
MAX1243 requires an external reference. The MAX1243
accepts signals from 0V to V
input range includes the positive supply rail. An exter-
nal clock accesses data from the 3-wire interface,
which connects directly to standard microcontroller I/O
ports. The interface is compatible with SPI™, QSPI™,
and Microwire™.
Excellent AC characteristics and very low power com-
bined with ease of use and small package size make
these converters ideal for remote-sensor and data-
acquisition applications, or for other circuits with
demanding power consumption and space require-
ments. The MAX1242/MAX1243 are available in 8-pin
DIP and SO packages.
Isolated Data Acquisition
19-1156; Rev 2; 6/98
Portable Data Logging
Test Equipment
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
__________________General Description
TOP VIEW
SHDN
V
REF
AIN
DD
________________________________________________________________ Maxim Integrated Products
1
2
3
4
MAX1242
MAX1243
DIP/SO
Pin Configuration
Process Control Monitoring
Temperature Measurement
+2.7V to +5.25V, Low-Power, 10-Bit
REF
, and the reference
Applications
8
7
6
5
DD
SCLK
CS
DOUT
GND
= 3V) at the
Ordering Information continued at end of data sheet.
Note: Order the MAX1242A in place of the MAX1242C. Order the
MAX1242B in place of the MAX1242D.
_________________Ordering Information
________________Functional Diagram
________________________________Features
MAX1242ACPA
MAX1242BCPA
MAX1242ACSA
MAX1242BCSA
MAX1242AEPA
MAX1242BEPA
SCLK
SHDN
+2.7V to +5.25V Single-Supply Operation
10-Bit Resolution
Internal 2.5V Reference (MAX1242)
Small Footprint: 8-Pin DIP and SO Packages
Low Power: 3.7mW (73ksps, MAX1242)
Internal Track/Hold
SPI™/QSPI™/Microwire™ 3-Wire Serial Interface
Pin-Compatible 12-Bit Upgrades:
MAX1240/MAX1241
REF
AIN
CS
PART
Serial ADCs in SO-8
7
8
3
2
4
MAX1242 ONLY
REFERENCE
CONTROL
3mW (73ksps, MAX1243)
66µW (1ksps, MAX1243)
5µW (power-down mode)
-40°C to +85°C
-40°C to +85°C
LOGIC
2.5V
T/H
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
GND
V
10-BIT
DD
SAR
1
5
CLOCK
INT
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
8 Plastic DIP
8 Plastic DIP
PACKAGE
MAX1242
MAX1243
PIN-
REGISTER
OUTPUT
SHIFT
6
(LSB)
±
±1
±
±1
±
±1
INL
DOUT
1
1
1
/
/
/
2
2
2
1
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