Rainbow-electronics MAX1139 Bedienungsanleitung

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General Description
The MAX1136–MAX1139 low-power, 10-bit, multichan-
nel 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 of 2.7V to 3.6V (MAX1137/
MAX1139) or 4.5V to 5.5V (MAX1136/MAX1138) 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 MAX1136/MAX1137 have four analog input chan-
nels each, while the MAX1138/MAX1139 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
DD
. The MAX1137/
MAX1139 feature a 2.048V internal reference and the
MAX1136/MAX1138 feature a 4.096V internal reference.
The MAX1136/MAX1137 are available in an 8-pin µMAX
package. The MAX1138/MAX1139 are available in a
16-pin QSOP package. The MAX1136–MAX1139 are
guaranteed over the extended temperature range
(-40°C to +85°C). For pin-compatible 12-bit parts, refer
to the MAX1136–MAX1139 data sheet. For pin-compati-
ble 8-bit parts, refer to the MAX1036–MAX1039 data
sheet.
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 (MAX1137/MAX1139)
4.5V to 5.5V (MAX1136/MAX1138)
Internal Reference
2.048V (MAX1137/MAX1139)
4.096V (MAX1136/MAX1138)
External Reference: 1V to V
DD
Internal Clock
4-Channel Single-Ended or 2-Channel Fully
Differential (MAX1136/MAX1137)
12-Channel Single-Ended or 6-Channel Fully
Differential (MAX1138/MAX1139)
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 (MAX1136/MAX1137)
16-Pin QSOP (MAX1138/MAX1139)
MAX1136–MAX1139
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial 10-Bit ADCs
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2334; Rev 1; 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.
Pin Configurations appear at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Selector Guide appears at end of data sheet.
PART
TEMP
RANGE
PIN-
PACKAGE
INL
(LSB)
MAX1136EUA
-40°C to +85°C
8 µMAX ±1
MAX1137EUA
-40°C to +85°C
8 µMAX ±1
MAX1138EEE
-40°C to +85°C
16 QSOP ±1
MAX1139EEE
-40°C to +85°C
16 QSOP ±1
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
I
2
C is a trademark of Philips Corp.
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Inhaltsverzeichnis

Seite 1 - MAX1136–MAX1139

General DescriptionThe MAX1136–MAX1139 low-power, 10-bit, multichan-nel analog-to-digital converters (ADCs) feature internaltrack/hold (T/H), voltage

Seite 2

MAX1136–MAX1139signal. At the end of the acquisition interval, the T/Hswitches move to the hold position retaining the chargeon CT/Has a stable sample

Seite 3

swing from (GND - 0.3V) to (VDD+ 0.3V) without caus-ing damage to the device. For accurate conversionsthe inputs must not go more than 50mV below GND

Seite 4

MAX1136–MAX1139Slave Address A bus master initiates communication with a slave deviceby issuing a START condition followed by a slaveaddress. When idl

Seite 5

Configuration/Setup Bytes (Write Cycle)A write cycle begins with the bus master issuing aSTART condition followed by seven address bits (Figure7) and

Seite 6

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs14 __________________________________________________

Seite 7

Data Byte (Read Cycle)A read cycle must be initiated to obtain conversionresults. Read cycles begin with the bus master issuinga START condition follo

Seite 8

MAX1136–MAX1139The device memory contains all of the conversionresults when the MAX1136–MAX1139 release SCL. Theconverted results are read back in a f

Seite 9

External ClockWhen configured for external clock mode (CLK = 1),the MAX1136–MAX1139 use the SCL as the conversionclock. In external clock mode, the MA

Seite 10

MAX1136–MAX113910ms prior to conversion or powered continuously.Wake-up is invisible when using an external reference orVDDas the reference.Automatic

Seite 11

ground’s power supply is low impedance and as shortas possible. Route digital signals far away from sensi-tive analog and reference inputs.High-freque

Seite 12

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs2 ___________________________________________________

Seite 13

Effective Number of Bits Effective number of bits (ENOB) indicates the globalaccuracy of an ADC at a specific input frequency andsampling rate. An ide

Seite 14

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs_____________________________________________________

Seite 15

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCsMaxim cannot assume responsibility for use of any cir

Seite 16

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs_____________________________________________________

Seite 17

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs4 ___________________________________________________

Seite 18

Note 1: For DC accuracy, the MAX1136/MAX1138 are tested at VDD= 5V and the MAX1137/MAX1139 are tested at VDD= 3V. All devices are configured for unipo

Seite 19

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs6 ___________________________________________________

Seite 20

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs_____________________________________________________

Seite 21

MAX1136–MAX11392.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs8 ___________________________________________________

Seite 22

Detailed DescriptionThe MAX1136–MAX1139 analog-to-digital converters(ADCs) use successive-approximation conversion tech-niques and fully differential

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