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MAX1237 fiches techniques PDF

Maxim Integrated - 12-Bit ADCs

Numéro de référence MAX1237
Description 12-Bit ADCs
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX1237 fiche technique
19-2333; Rev 7; 5/10
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
General Description
The MAX1236–MAX1239 low-power, 12-bit, multichan-
nel analog-to-digital converters (ADCs) feature internal
track/hold (T/H), voltage reference, clock, and an
I2C-compatible 2-wire serial interface. These devices
operate from a single supply of 2.7V to 3.6V (MAX1237/
MAX1239) or 4.5V to 5.5V (MAX1236/MAX1238) and
require only 670µA at the maximum sampling rate of
94.4ksps. Supply current falls below 230µA for sam-
pling rates under 46ksps. AutoShutdown™ powers
down the devices between conversions, reducing sup-
ply current to less than 1µA at low throughput rates.
The MAX1236/MAX1237 have four analog input chan-
nels each, while the MAX1238/MAX1239 have 12 ana-
log input channels each. The fully differential analog
inputs are software configurable for unipolar or bipolar,
and single-ended or differential operation.
The full-scale analog input range is determined by the
internal reference or by an externally applied reference
voltage ranging from 1V to VDD. The MAX1237/
MAX1239 feature a 2.048V internal reference and the
MAX1236/MAX1238 feature a 4.096V internal reference.
The MAX1236/MAX1237 are available in an 8-pin µMAX®
package. The MAX1238/MAX1239 are available in a 16-
pin QSOP package. The MAX1236–MAX1239 are guar-
anteed over the extended temperature range
(-40°C to +85°C). For pin-compatible 10-bit parts, refer to
the MAX1136–MAX1139 data sheet. For pin-compatible
8-bit parts, refer to the MAX1036–MAX1039 data sheet.
Applications
Handheld Portable
Applications
Medical Instruments
Battery-Powered Test
Equipment
Solar-Powered Remote
Systems
Received-Signal-Strength
Indicators
System Supervision
Selector Guide
PART
INPUT
CHANNELS
INTERNAL
REFERENCE
(V)
SUPPLY
VOLTAGE
(V)
INL
(LSB)
MAX1236
MAX1237
MAX1238
MAX1239
4
4
12
12
4.096
2.048
4.096
2.048
4.5 to 5.5
2.7 to 3.6
4.5 to 5.5
2.7 to 3.6
±1
±1
±1
±1
Features
High-Speed I2C-Compatible Serial Interface
400kHz Fast Mode
1.7MHz High-Speed Mode
Single-Supply
2.7V to 3.6V (MAX1237/MAX1239)
4.5V to 5.5V (MAX1236/MAX1238)
Internal Reference
2.048V (MAX1237/MAX1239)
4.096V (MAX1236/MAX1238)
External Reference: 1V to VDD
Internal Clock
4-Channel Single-Ended or 2-Channel Fully
Differential (MAX1236/MAX1237)
12-Channel Single-Ended or 6-Channel Fully
Differential (MAX1238/MAX1239)
Internal FIFO with Channel-Scan Mode
Low Power
670µA at 94.4ksps
230µA at 40ksps
60µA at 10ksps
6µA at 1ksps
0.5µA in Power-Down Mode
Software-Configurable Unipolar/Bipolar
Small Packages
8-Pin µMAX (MAX1236/MAX1237)
16-Pin QSOP (MAX1238/MAX1239)
Ordering Information
PART
TEMP RANGE PIN-
I2C SLAVE
PACKAGE ADDRESS
MAX1236EUA+ -40°C to +85°C 8 µMAX
0110100
MAX1237EUA+ -40°C to +85°C 8 µMAX
0110100
MAX1238EEE+ -40°C to +85°C 16 QSOP
MAX1238EEE/V+ -40°C to +85°C 16 QSOP
0110101
0110101
MAX1239EEE+ -40°C to +85°C 16 QSOP 0110101
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
________________________________________________________________ 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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