MAX1240 Maxim, MAX1240 Datasheet
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MAX1240
Manufacturer Part Number
MAX1240
Description
+2.7V / Low-Power / 12-Bit Serial ADCs in 8-Pin SO
Manufacturer
Maxim
Datasheet
1.MAX1240.pdf
(16 pages)
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The MAX1240/MAX1241 are low-power, 12-bit analog-
to-digital converters (ADCs) available in 8-pin pack-
ages. The MAX1240 operates with a single +2.7V to
+3.6V supply, and the MAX1241 operates with a single
+2.7V to +5.25V supply. Both devices feature a 7.5µs
successive-approximation ADC, a fast track/hold
(1.5µs), an on-chip clock, and a high-speed, 3-wire ser-
ial interface.
Power consumption is only 37mW (V
73ksps maximum sampling speed. A 2µA shutdown
mode reduces power at slower throughput rates.
The MAX1240 has an internal 2.5V reference, while the
MAX1241 requires an external reference. The MAX1241
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 MAX1240/MAX1241 are available in 8-pin
DIP and SO packages.
19-1155; Rev 2; 11/98
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
__________________General Description
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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Battery-Powered Systems
Portable Data Logging
Isolated Data Acquisition
Process Control
Instrumentation
SHDN
V
REF
AIN
DD
________________________________________________________________ Maxim Integrated Products
1
2
3
4
MAX1240
MAX1241
DIP/SO
Pin Configuration
REF
, and the reference
Applications
8
7
6
5
DD
SCLK
CS
DOUT
GND
= 3V) at the
12-Bit Serial ADCs in 8-Pin SO
Ordering Information continued at end of data sheet.
* Dice are specified at T
________________________________Features
MAX1240ACPA
MAX1240BCPA
MAX1240CCPA
MAX1240ACSA
MAX1240BCSA
MAX1240CCSA
SCLK
SHDN
MAX1240BC/D
REF
Single-Supply Operation:
12-Bit Resolution
Internal 2.5V Reference (MAX1240)
Small Footprint: 8-Pin DIP/SO Packages
Low Power: 3.7µW (73ksps, MAX1240)
Internal Track/Hold
SPI/QSPI/MICROWIRE 3-Wire Serial Interface
Internal Clock
AIN
CS
PART
+2.7V to +3.6V (MAX1240)
+2.7V to +5.25V (MAX1241)
3mW (73ksps, MAX1241)
66µW (1ksps, MAX1241)
5µW (power-down mode)
7
8
3
2
4
+2.7V, Low-Power,
(MAX1240 ONLY)
2.5V REFERENCE
CONTROL
LOGIC
T/H
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
A
= +25°C, DC parameters only.
Ordering Information
Functional Diagram
GND
5
V
12-BIT
DD
SAR
1
CLOCK
INT
8 Plastic DIP
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
8 SO
Dice*
PACKAGE
PIN-
MAX1240
MAX1241
REGISTER
OUTPUT
SHIFT
6
(LSB)
±
±
INL
±1
±1
±1
±1
±1
1
1
DOUT
/
/
2
2
1