Rainbow-electronics MAX1039 User Manual

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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
I
2
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
DD
. 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
Hand-Held Portable Applications
Medical Instruments
Battery-Powered Test Equipment
Solar-Powered Remote Systems
Received-Signal-Strength Indicators
System Supervision
Features
High-Speed I
2
C-Compatible Serial Interface
400kHz Fast Mode
1.7MHz High-Speed Mode
Single Supply
2.7V to 3.6V (MAX1037/MAX1039)
4.5V to 5.5V (MAX1036/MAX1038)
Internal Reference
2.048V (MAX1037/MAX1039)
4.096V (MAX1036/MAX1038)
External Reference: 1V to V
DD
Internal Clock
4-Channel Single-Ended or 2-Channel Pseudo-
Differential (MAX1036/MAX1037)
12-Channel Single-Ended or 6-Channel Pseudo-
Differential (MAX1038/MAX1039)
Internal FIFO with Channel-Scan Mode
Low Power
350µA at 188ksps
110µA at 75ksps
8µA at 10ksps
1µA in Power-Down Mode
Software Configurable Unipolar/Bipolar
Small Packages
8-Pin SOT23 (MAX1036/MAX1037)
16-Pin QSOP (MAX1038/MAX1039)
MAX1036–MAX1039
2.7V to 5.5V, Low-Power, 4-/12-Channel
2-Wire Serial 8-Bit ADCs
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2442; Rev 0; 4/02
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.
PART TEMP RANGE PIN-PACKAGE
TUE
(LSB)
INPUT
CHANNELS
INTERNAL
REFERENCE (V)
TOP
MARK
MAX1036EKA-T -40°C to +85°C 8 SOT23-8 ±2 4 4.096 AAJE
MAX1037EKA-T -40°C to +85°C 8 SOT23-8 ±2 4 2.048 AAJG
MAX1038AEEE -40°C to +85°C 16 QSOP ±1 12 4.096
MAX1039AEEE -40°C to +85°C 16 QSOP ±1 12 2.048
I
2
C is a trademark of Philips Corp.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Pin Configurations and Typical Operating Circuit appear
at end of data sheet.
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Summary of Contents

Page 1 - 2-Wire Serial 8-Bit ADCs

General DescriptionThe MAX1036–MAX1039 low-power, 8-bit, multichannel,analog-to-digital converters (ADCs) feature internaltrack/hold (T/H), voltage re

Page 2

MAX1036–MAX1039Analog Input BandwidthThe MAX1036–MAX1039 feature input tracking circuitrywith a 2MHz small signal-bandwidth. The 2MHz inputbandwidth m

Page 3

Single-Ended/Pseudo-Differential InputThe SGL/DIF bit of the configuration byte configures theMAX1036–MAX1039 analog input circuitry for single-ended

Page 4

MAX1036–MAX1039SCL is high (Figure 5). A repeated START condition (Sr)can be used in place of a STOP condition to leave thebus active and in its curre

Page 5

a START condition followed by 7 address bits and aread bit (R/W = 1). If the address byte is successfullyreceived, the MAX1036–MAX1039 (slave) issue a

Page 6

MAX1036–MAX1039in random access memory (RAM). If the scan mode isset for multiple conversions, they all happen in succes-sion with each additional res

Page 7

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs_________________________________________________________________________

Page 8

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs16 ______________________________________________________________________

Page 9

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs_________________________________________________________________________

Page 10

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs18 ______________________________________________________________________

Page 11

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs_________________________________________________________________________

Page 12

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs2 _______________________________________________________________________

Page 13

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs20 ______________________________________________________________________

Page 14

In reality, there are other noise sources besides quanti-zation noise, including thermal noise, reference noise,clock jitter, etc. Therefore, SNR is c

Page 15

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCsMaxim cannot assume responsibility for use of any circuitry other than ci

Page 16

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs_________________________________________________________________________

Page 17

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs4 _______________________________________________________________________

Page 18

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs_________________________________________________________________________

Page 19

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs6 _______________________________________________________________________

Page 20

MAX1036–MAX10392.7V to 5.5V, Low-Power, 4-/12-Channel2-Wire Serial 8-Bit ADCs_________________________________________________________________________

Page 21

MAX1036–MAX1039Detailed DescriptionThe MAX1036–MAX1039 ADCs use successive-approximation conversion techniques and input T/H cir-cuitry to capture and

Page 22

of the address byte (see the Slave Address section).The T/H circuitry enters hold mode two internal clockcycles later. A conversion or series of conve

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