Datasheet

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General Description

The MAX1036–MAX1039 low-power, 8-bit, multichannel,

analog-to-digital converters (ADCs) feature internal

track/hold (T/H), voltage reference, clock, and an

C-compatible 2-wire serial interface. These devices

operate from a single supply and require only 350µA at

the maximum sampling rate of 188ksps. Auto-

Shutdown™ powers down the devices between conver-

sions reducing supply current to less than 1µA at low

throughput rates. The MAX1036/MAX1037 have four ana-

log input channels each, while the MAX1038/MAX1039

have twelve analog input channels. The analog inputs are

software configurable for unipolar or bipolar and single-

ended or pseudo-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

. The MAX1037/

MAX1039 feature a 2.048V internal reference and the

MAX1036/MAX1038 feature a 4.096V internal reference.

The MAX1036/MAX1037 are available in 8-pin SOT23

packages. The MAX1038/MAX1039 are available in 16-

pin QSOP packages. The MAX1036–MAX1039 are guar-

anteed over the extended industrial temperature range

(-40°C to +85°C). Refer to MAX1136–MAX1139 for 10-bit

devices and to the MAX1236–MAX1239 for 12-bit

devices.

Applications

Handheld Portable Applications

Medical Instruments

Battery-Powered Test Equipment

Solar-Powered Remote Systems

Received-Signal-Strength Indicators

System Supervision

Features

o High-Speed I

C-Compatible Serial Interface

400kHz Fast Mode

1.7MHz High-Speed Mode

o Single Supply

2.7V to 3.6V (MAX1037/MAX1039)

4.5V to 5.5V (MAX1036/MAX1038)

o Internal Reference

2.048V (MAX1037/MAX1039)

4.096V (MAX1036/MAX1038)

o External Reference: 1V to V

o Internal Clock

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

Differential (MAX1036/MAX1037)

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

Differential (MAX1038/MAX1039)

o Internal FIFO with Channel-Scan Mode

o Low Power

350µA at 188ksps

110µA at 75ksps

8µA at 10ksps

1µA in Power-Down Mode

o Software Configurable Unipolar/Bipolar

o Small Packages

8-Pin SOT23 (MAX1036/MAX1037)

16-Pin QSOP (MAX1038/MAX1039)

MAX1036–MAX1039

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

4-/12-Channel 2-Wire Serial 8-Bit ADCs

________________________________________________________________

Maxim Integrated Products

Ordering Information/Selector Guide

19-2442; Rev 4; 5/09

PART PIN-PACKAGE

TUE

(LSB)

INPUT

CHANNELS

SLAVE ADDRESS

INTERNAL

REFERENCE (V)

TOP MARK

MAX1036EKA+T 8 SOT23 ±2 4 1100100 4.096 AAJE

MAX1037EKA+T 8 SOT23 ±2 4 1100100 2.048 AAJG

MAX1038AEEE+ 16 QSOP ±1 12 1100101 4.096 —

MAX1039AEEE+ 16 QSOP ±1 12 1100101 2.048 —

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

Pin Configurations and Typical Operating Circuit appear

at end of data sheet.

EVALUATION KIT

AVAILABLE

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.

Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

Summary of content (23 pages)

PAGE 1
9-2442; Rev 4; 5/09 KIT ATION EVALU E L B A AVAIL 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs The MAX1036–MAX1039 low-power, 8-bit, multichannel, 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 and require only 350µA at the maximum sampling rate of 188ksps.
PAGE 2
MAX1036–MAX1039 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V AIN0–AIN11, REF to GND ......................-0.3V to the lower of (VDD + 0.3V) and +6V SDA, SCL to GND.....................................................-0.3V to +6V Maximum Current Into Any Pin .........................................
PAGE 3
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs (V DD = 2.7V to 3.6V (MAX1037/MAX1039), V DD = 4.5V to 5.5V (MAX1036/MAX1038). External reference, V REF = 2.048V (MAX1037/MAX1039), VREF = 4.096V (MAX1036/MAX1038). External clock, fSCL = 1.7MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX1036–MAX1039 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs ELECTRICAL CHARACTERISTICS (continued) (V DD = 2.7V to 3.6V (MAX1037/MAX1039), V DD = 4.5V to 5.5V (MAX1036/MAX1038). External reference, V REF = 2.048V (MAX1037/MAX1039), VREF = 4.096V (MAX1036/MAX1038). External clock, fSCL = 1.7MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 5
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs (V DD = 2.7V to 3.6V (MAX1037/MAX1039), V DD = 4.5V to 5.5V (MAX1036/MAX1038). External reference, V REF = 2.048V (MAX1037/MAX1039), VREF = 4.096V (MAX1036/MAX1038). External clock, fSCL = 1.7MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 6
Typical Operating Characteristics (VDD = 3.3V (MAX1037/MAX1039), VDD = 5V (MAX1036/MAX1038), fSCL = 1.7MHz, external clock (33% duty cycle), fSAMPLE = 188ksps, single ended, unipolar, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. TEMPERATURE 400 A SDA = SCL = VDD 4 INTERNAL 4.096VREF IDD (µA) B 300 C 300 INTERNAL 2.048VREF 3 2 EXTERNAL 4.096VREF 250 250 IDD (µA) 350 350 IDD (µA) 5 MAX1036 toc02 A) INTERNAL 4.096VREF B) INTERNAL 2.048VREF C) EXTERNAL 4.096VREF D) EXTERNAL 2.
PAGE 7
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs INTERNAL 2.048V REFERENCE VOLTAGE vs. TEMPERATURE 0.3 DNL (LSB) 1.005 1.000 0.995 0.990 0.985 0.980 0.4 0.3 0.2 0.2 0.1 0.1 0 -0.1 -0.2 -0.3 -0.3 -0.4 -0.4 35 60 85 -0.5 0 50 100 TEMPERATURE (°C) 150 200 250 0 300 50 1.0 MAX1036 toc13 fSAMPLE = 188ksps fIN = 25kHz -40 -60 -80 VREF = 2.048V 0.9 0.8 OFFSET ERROR (LSB) -20 150 200 250 300 OFFSET ERROR vs.
PAGE 8
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs MAX1036–MAX1039 Pin Description PIN MAX1036/ MAX1037 MAX1038/ MAX1039 NAME FUNCTION 1, 2, 3 8, 7, 6 AIN0–AIN2 — 5, 4, 3, 2, 1 AIN3–AIN7 — 16, 15, 14 AIN8–AIN10 4 — AIN3/REF Analog Input 3/Reference Input or Output. Selected in the setup register. — 13 AIN11/REF Analog Input 11/Reference Input or Output. Selected in the setup register.
PAGE 9
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs MAX1036–MAX1039 A. F/S-MODE I2C SERIAL INTERFACE TIMING tR tF t SDA tSU.DAT tHD.DAT tHD.STA tLOW tBUF tSU.STA tSU.STO SCL tHD.STA tHIGH tR tF S A Sr P S B. HS-MODE I2C SERIAL INTERFACE TIMING tRDA tFDA SDA tSU.DAT tHD.DAT tBUF tHD.STA tLOW tSU.STO tSU.STA SCL tHD.STA tHIGH tRCL tFCL tRCL1 S Sr A S HS-MODE F/S-MODE Figure 1.
PAGE 10
MAX1036–MAX1039 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs SDA SCL INPUT SHIFT REGISTER VDD SETUP REGISTER GND CONTROL LOGIC INTERNAL OSCILLATOR CONFIGURATION REGISTER AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 AIN8 AIN9 AIN10 AIN11/REF T/H ANALOG INPUT MUX OUTPUT SHIFT REGISTER AND 12-BYTE RAM 8-BIT ADC REF REFERENCE 4.096V (MAX1038) 2.048V (MAX1039) MAX1038 MAX1039 Figure 3.
PAGE 11
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs BIT 7 (MSB) BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 (LSB) REG SEL2 SEL1 SEL0 CLK BIP/UNI RST X BIT NAME 7 REG 6 SEL2 5 SEL1 4 SEL0 3 CLK 2 BIP/UNI 1 RST 0 X MAX1036–MAX1039 Table 1. Setup Byte Format DESCRIPTION Register bit. 1 = Setup Byte, 0 = Configuration Byte (Table 2). Three bits select the reference voltage and the state of AIN_/REF (Table 6). Default to 000 at power-up.
PAGE 12
MAX1036–MAX1039 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs SCL is high (Figure 5). A repeated START condition (Sr) can be used in place of a STOP condition to leave the bus active and in its current timing mode (see the HSMode section). Acknowledge Bits Successful data transfers are acknowledged with an acknowledge bit (A) or a not-acknowledge bit (A). Both the master and the MAX1036–MAX1039 (slave) generate acknowledge bits.
PAGE 13
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs SLAVE ADDRESS MAX1036/MAX1037 1100100 MAX1038/MAX1039 1100101 MAX1036–MAX1039 DEVICE SLAVE ADDRESS S 1 1 0 0 1 0 0 R/W A SDA 1 SCL 2 3 4 5 6 7 8 9 Figure 7. MAX1036/MAX1037 Slave Address Byte HS-MODE MASTER CODE S 0 0 0 0 1 X X X A Sr SDA SCL F/S-MODE HS-MODE Figure 8. F/S-Mode to HS-Mode Transfer a START condition followed by 7 address bits and a read bit (R/W = 1).
PAGE 14
MAX1036–MAX1039 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs MASTER TO SLAVE SLAVE TO MASTER A. 1-BYTE WRITE CYCLE 1 S 7 1 1 SLAVE ADDRESS 8 1 NUMBER OF BITS 1 SETUP OR W A A P OR Sr CONFIGURATION BYTE MSB DETERMINES WHETHER SETUP OR CONFIGURATION BYTE B.
PAGE 15
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs BIT 7 (MSB) BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 (LSB) REG SCAN1 SCAN0 CS3 CS2 CS1 CS0 SGL/DIF BIT NAME 7 REG 6 SCAN1 5 SCAN0 4 CS3 3 CS2 2 CS1 1 CS0 0 SGL/DIF DESCRIPTION Register bit. 1 = Setup Byte (Table 1), 0 = Configuration Byte. Scan select bits. Two bits select the scanning configuration (Table 5). Default to 00 at power-up. Channel select bits.
PAGE 16
MAX1036–MAX1039 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs MASTER TO SLAVE SLAVE TO MASTER A. SINGLE CONVERSION WITH INTERNAL CLOCK 1 7 1 1 S SLAVE ADDRESS R A 1 8 tACQ NUMBER OF BITS A P or Sr RESULT CLOCK STRETCH 1 tCONV B.
PAGE 17
2.7V to 3.6V and 4.5V to 5.
PAGE 18
MAX1036–MAX1039 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs Table 4.
PAGE 19
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs SCAN1 SCAN0 SCANNING CONFIGURATION 0 0 Scans up from AIN0 to the input selected by CS3–CS0 (default setting). 0 1 Converts the input selected by CS3–CS0 eight times.* Scans up from AIN2 to the input selected by CS1 and CS0. When CS1 and CS0 are set for AIN0–AIN2, the scanning stops at AIN2 (MAX1036/MAX1037). 1 0 Scans up from AIN6 to the input selected by CS3–CS0.
PAGE 20
MAX1036–MAX1039 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs OUTPUT CODE 1LSB = OUTPUT CODE (TWO'S COMPLEMENT) VREF 256 1LSB = VREF 256 REF 0...111 0...110 0...101 0...100 REF 1...111 1...110 1...101 1...100 0...001 0...000 1...111 1...011 1...010 1...001 1...000 0...011 0...010 0...001 0...000 0 1 2 3 252 253 254 255 256 -128 -127 -126 -125 -1 0 +1 +124 +125 +126 +127 +128 '-' INPUT INPUT VOLTAGE (LSB) INPUT VOLTAGE (LSB) Figure 12.
PAGE 21
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs Signal-to-Noise Plus Distortion Signal-to-noise plus distortion (SINAD) is the ratio of the fundamental input frequency’s RMS amplitude to RMS equivalent of all other ADC output signals. SINAD (dB) = 20 log (SignalRMS / NoiseRMS) Effective Number of Bits Effective number of bits (ENOB) indicates the global accuracy of an ADC at a specific input frequency and sampling rate.
PAGE 22
2.7V to 3.6V and 4.5V to 5.
PAGE 23
2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs REVISION NUMBER REVISION DATE DESCRIPTION 2 5/08 Updated Ordering Information table 3 2/09 Discontinued some versions of the family 4 5/09 Updated Note 13 in Electrical Characteristics table PAGES CHANGED 1, 21 1, 5, 18, 21 5 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.