max1239keee Maxim Integrated Products, max1239keee Datasheet

max1239keee

Manufacturer Part Number

max1239keee

Description

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1239KEEE.pdf (22 pages)

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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

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 2; 2/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

MAX1236EUA

MAX1237EUA

MAX1238EEE

MAX1239EEE

C-compatible 2-wire serial interface. These devices

PART

Hand-Held Portable Applications

Medical Instruments

Battery-Powered Test Equipment

Solar-Powered Remote Systems

Received-Signal-Strength Indicators

System Supervision

2.7V to 3.6V and 4.5V to 5.5V, Low-Power,

CHANNELS

4-/12-Channel, 2-Wire Serial, 12-Bit ADCs

________________________________________________________________ Maxim Integrated Products

INPUT

General Description

REFERENCE

INTERNAL

Selector Guide

4.096

2.048

4.096

2.048

(V)

Applications

. The MAX1237/

VOLTAGE (V)

4.5 to 5.5

2.7 to 3.6

4.5 to 5.5

2.7 to 3.6

SUPPLY

o High-Speed I

o Single-Supply

o Internal Reference

o External Reference: 1V to V

o Internal Clock

o 4-Channel Single-Ended or 2-Channel Fully

o 12-Channel Single-Ended or 6-Channel Fully

o Internal FIFO with Channel-Scan Mode

o Low Power

o Software-Configurable Unipolar/Bipolar

o Small Packages

*Future product—contact factory for availability.

MAX1236EUA

MAX1236KEUA* - 40 C to + 85 C

MAX1236LEUA* - 40 C to + 85 C

M AX 1236M E U A* - 40 C to + 85 C

MAX1237EUA

MAX1237KEUA* - 40 C to + 85 C

MAX1237LEUA* - 40 C to + 85 C

M AX 1237M E U A* - 40 C to + 85 C

Ordering Information continued at end of data sheet.

Pin Configurations appear at end of data sheet.

Typical Operating Circuit appears at end of data sheet.

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

- 40 C to + 85 C

C-Compatible Serial Interface

RANGE

TEMP

Ordering Information

PA CKA GE

8 µMAX

PIN-

ADDRESS

Features

0110100

0110000

0110010

0110110

0110100

0110000

0110010

0110110

C SLAVE

( L SB )

IN L

Related parts for max1239keee

max1239keee Summary of contents

Page 1

... MAX1238EEE 12 4.096 MAX1239EEE 12 2.048 AutoShutdown is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o High-Speed I 400kHz Fast Mode 1.7MHz High-Speed Mode o Single-Supply 2 ...

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 0.1µF, f REF T = +25°C, see Tables 1–5 for programming notation.) ...

Page 4

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 0.1µF, f REF T = +25°C, see Tables 1–5 for ...

Page 6

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 (GND - 0.3V ing damage to the device. For accurate conversions, the inputs must not go more than 50mV below GND or ...

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 BIT 5 (MSB) REG SCAN1 SCAN0 BIT NAME 7 REG Register bit 1 = setup byte (see Table ...

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 11, the scanning stops 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 V REF AIN- 011...111 2 011...110 ZS = AIN- -V REF - AIN- 000...010 2 V 000...001 REF 1 LSB ...

Page 20

... MAX1238KEEE QSOP *R S MAX1238LEEE QSOP SDA SCL MAX1238MEEE QSOP *R S MAX1239EEE MAX1239KEEE R P MAX1239LEEE MAX1239MEEE - QSOP R P *Future product—contact factory for availability. MAX1236/MAX1237 TRANSISTORS COUNT: 11,362 MAX1238/MAX1239 TRANSISTORS COUNT: 12,956 ...

Page 21

Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ÿ ...

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 © 2003 Maxim Integrated Products ...

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