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MAX1241 fiches techniques PDF

Maxim Integrated - 12-Bit Serial ADCs

Numéro de référence MAX1241
Description 12-Bit Serial ADCs
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX1241 fiche technique
19-1155; Rev 5; 8/10
EVAALVUAAILTAIOBNLEKIT
+2.7V, Low-Power,
12-Bit Serial ADCs in 8-Pin SO
__________________General Description
The MAX1240/MAX1241 low-power, 12-bit analog-to-
digital converters (ADCs) are 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 (VDD = 3V) at the
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 VREF, and the reference
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
PDIP and SO packages.
Battery-Powered Systems
Portable Data Logging
Isolated Data Acquisition
Process Control
Instrumentation
Applications
Pin Configuration
________________________________Features
Single-Supply Operation:
+2.7V to +3.6V (MAX1240)
+2.7V to +5.25V (MAX1241)
12-Bit Resolution
Internal 2.5V Reference (MAX1240)
Small Footprint: 8-Pin PDIP/SO Packages
Low Power: 3.7µW (73ksps, MAX1240)
3mW (73ksps, MAX1241)
66µW (1ksps, MAX1241)
5µW (power-down mode)
Internal Track/Hold
SPI/QSPI/MICROWIRE 3-Wire Serial Interface
Internal Clock
Ordering Information
PART*
TEMP RANGE
PIN-
PACKAGE
INL
(LSB)
MAX1240ACPA+
0°C to +70°C 8 PDIP
±1/2
MAX1240BCPA+
0°C to +70°C 8 PDIP
±1
MAX1240CCPA+
0°C to +70°C 8 PDIP
±1
MAX1240ACSA+
0°C to +70°C 8 SO
±1/2
MAX1240BCSA+
MAX1240CCSA+
0°C to +70°C 8 SO
0°C to +70°C 8 SO
±1
±1
MAX1240CC/D
0°C to +70°C Dice*
±1
MAX1240AESA/V+** -40°C to +85°C 8 SO
±1/2
MAX1240BESA/V+ -40°C to +85°C 8 SO
Ordering Information continued at end of data sheet.
*Dice are specified at TA = +25°C, DC parameters only.
**Future product—contact factory for availability.
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
±1
Functional Diagram
CS
SCLK
7
8
VDD
1
TOP VIEW
SHDN 3
CONTROL
LOGIC
INT
CLOCK
VDD 1
8 SCLK
AIN 2
SHDN 3
REF 4
MAX1240
MAX1241
7 CS
6 DOUT
5 GND
PDIP/SO
AIN 2
T/H
4
REF
2.5V REFERENCE
(MAX1240 ONLY)
12-BIT
SAR
5
GND
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
OUTPUT
SHIFT
REGISTER
MAX1240
MAX1241
6
DOUT
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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