MAX1238EVKIT Maxim Integrated Products, MAX1238EVKIT Datasheet

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MAX1238EVKIT

Manufacturer Part Number
MAX1238EVKIT
Description
EVAL KIT FOR MAX1238
Manufacturer
Maxim Integrated Products
Datasheets

Specifications of MAX1238EVKIT

Number Of Adc's
1
Number Of Bits
12
Sampling Rate (per Second)
94k
Data Interface
Serial
Inputs Per Adc
12 Single Ended or 6 Differential
Input Range
±VREF/2
Power (typ) @ Conditions
3.35mW @ 94kSPS
Voltage Supply Source
Single Supply
Operating Temperature
0°C ~ 70°C
Utilized Ic / Part
MAX1238
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
I
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 V
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.
19-2333; Rev 7; 5/10
Handheld Portable
Applications
Medical Instruments
Battery-Powered Test
Equipment
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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.
2
MAX1236
MAX1237
MAX1238
MAX1239
C-compatible 2-wire serial interface. These devices
PART
CHANNELS
INPUT
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
12
12
4
4
4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
________________________________________________________________ Maxim Integrated Products
General Description
REFERENCE
INTERNAL
4.096
2.048
4.096
2.048
Solar-Powered Remote
Systems
Received-Signal-Strength
Indicators
System Supervision
(V)
Selector Guide
DD
Applications
. The MAX1237/
VOLTAGE
4.5 to 5.5
2.7 to 3.6
4.5 to 5.5
2.7 to 3.6
SUPPLY
(V)
(LSB)
INL
±1
±1
±1
±1
®
♦ High-Speed I
♦ Single-Supply
♦ Internal Reference
♦ External Reference: 1V to V
♦ Internal Clock
♦ 4-Channel Single-Ended or 2-Channel Fully
♦ 12-Channel Single-Ended or 6-Channel Fully
♦ Internal FIFO with Channel-Scan Mode
♦ Low Power
♦ Software-Configurable Unipolar/Bipolar
♦ Small Packages
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
MAX1236EUA+
MAX1237EUA+
MAX1238EEE+
MAX1238EEE/V+
MAX1239EEE+
Differential (MAX1236/MAX1237)
Differential (MAX1238/MAX1239)
400kHz Fast Mode
1.7MHz High-Speed Mode
2.7V to 3.6V (MAX1237/MAX1239)
4.5V to 5.5V (MAX1236/MAX1238)
2.048V (MAX1237/MAX1239)
4.096V (MAX1236/MAX1238)
670µA at 94.4ksps
230µA at 40ksps
60µA at 10ksps
6µA at 1ksps
0.5µA in Power-Down Mode
8-Pin µMAX (MAX1236/MAX1237)
16-Pin QSOP (MAX1238/MAX1239)
PART
2
C-Compatible Serial Interface
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
DD
PIN-
PACKAGE
8 µMAX
8 µMAX
16 QSOP
16 QSOP
16 QSOP
Features
I
ADDRESS
2
0110100
0110100
0110101
0110101
0110101
C SLAVE
1

Related parts for MAX1238EVKIT

MAX1238EVKIT Summary of contents

Page 1

... MAX1239 12 2.048 AutoShutdown is a trademark of Maxim Integrated Products, Inc. µMAX is a registered trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products 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. ♦ High-Speed I 400kHz Fast Mode 1.7MHz High-Speed Mode ♦ ...

Page 2

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD AIN0–AIN11, REF to GND ............-0.3V to the lower of (V SDA, SCL to GND.....................................................-0.3V to +6V Maximum ...

Page 3

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs ELECTRICAL CHARACTERISTICS (continued 2.7V to 3.6V (MAX1237/MAX1239 4.096V (MAX1236/MAX1238 1.7MHz, T SCL Tables 1–5 for programming notation.) PARAMETER SYMBOL Throughput Rate ...

Page 4

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs ELECTRICAL CHARACTERISTICS (continued 2.7V to 3.6V (MAX1237/MAX1239 4.096V (MAX1236/MAX1238 1.7MHz, T SCL Tables 1–5 for programming notation.) PARAMETER SYMBOL POWER REQUIREMENTS ...

Page 5

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs TIMING CHARACTERISTICS (Figure 1) (continued 2.7V to 3.6V (MAX1237/MAX1239 4.096V (MAX1236/MAX1238), f SCL T = +25°C, see Tables 1–5 for programming notation.) A ...

Page 6

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs TIMING CHARACTERISTICS (Figure 1) (continued 2.7V to 3.6V (MAX1237/MAX1239 4.096V (MAX1236/MAX1238), f SCL T = +25°C, see Tables 1–5 for programming notation.) A ...

Page 7

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs (V = 3.3V (MAX1237/MAX1239 ended, unipolar +25°C, unless otherwise noted.) A AVERAGE SUPPLY CURRENT vs. CONVERSION RATE (EXTERNAL CLOCK) 800 A) INTERNAL ...

Page 8

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs PIN MAX1236 MAX1238 MAX1237 MAX1239 — 4–8 — 16, 15 — — ...

Page 9

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs SDA SCL V DD GND AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 AIN8 AIN9 AIN10 AIN11/REF Figure 2. MAX1238/MAX1239 Simplified Functional Diagram ...

Page 10

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs signal. At the end of the acquisition interval, the T/H switches move to the hold position retaining the charge stable sample of the ...

Page 11

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs swing from (V - 0.3V 0.3V) without caus- GND DD ing damage to the device. For accurate conversions, the inputs must not go more ...

Page 12

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs A bus master initiates communication with a slave device by issuing a START condition followed by a slave address. When idle, the MAX1236–MAX1239 continu- ously wait for ...

Page 13

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs Configuration/Setup Bytes (Write Cycle) A write cycle begins with the bus master issuing a START condition followed by seven address bits (Figure 7) and a write bit ...

Page 14

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs Table 2. Configuration Byte Format BIT 7 BIT 6 (MSB) REG SCAN1 SCAN0 BIT NAME 7 REG Register bit 1 = setup byte (see Table 1), 0 ...

Page 15

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs Table 4. Channel Selection in Differential Mode (SGL/DIF = CS3 CS2 CS1 CS0 AIN0 ...

Page 16

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs MASTER TO SLAVE SLAVE TO MASTER A. SINGLE CONVERSION WITH INTERNAL CLOCK SLAVE ADDRESS R A CLOCK STRETCH RESULT 4 MSBs ...

Page 17

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs Table 5. Scanning Configuration SCAN1 SCAN0 Scans up from AIN0 to the input selected by CS3–CS0. When CS3–CS0 exceeds 1011, the scanning 0 0 stops at AIN11. ...

Page 18

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs Table 6. Reference Voltage and AIN_/REF Format SEL2 SEL1 SEL0 REFERENCE VOLTAGE ...

Page 19

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs OUTPUT CODE REF 011 . . . 111 2 011 . . . 110 REF - 000 . ...

Page 20

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs ⎡ SignalRMS = × SINAD log ⎢ ⎣ NoiseRMS THDRMS Effective Number of Bits Effective number of bits (ENOB) indicates the global accuracy ...

Page 21

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs Chip Information PROCESS: BiCMOS ______________________________________________________________________________________ Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in ...

Page 22

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Corrected a typo in the Internal Clock section ...

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