MAX11642EEG+T Maxim Integrated, MAX11642EEG+T Datasheet

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MAX11642EEG+T

Manufacturer Part Number
MAX11642EEG+T
Description
Analog to Digital Converters - ADC 16Ch 8-Bit 300ksps w/FIFO & Int Ref
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX11642EEG+T

Rohs
yes
Number Of Channels
16/8
Architecture
SAR
Conversion Rate
300 KSPs
Resolution
8 bit
Input Type
Single-Ended/Differential
Interface Type
SPI
Operating Supply Voltage
4.75 V to 5.25 V
Maximum Power Dissipation
762 mW
Number Of Converters
1
Voltage Reference
4.096 V
The MAX11638/MAX11639/MAX11642/MAX11643 are
serial 8-bit analog-to-digital converters (ADCs) with an
internal reference. These devices feature on-chip FIFO,
scan mode, internal clock mode, internal averaging,
and AutoShutdown™. The maximum sampling rate is
300ksps using an external clock. The MAX11642/
MAX11643 have 16 input channels and the MAX11638/
MAX11639 have 8 input channels. These four devices
operate from either a +3V supply or a +5V supply, and
contain a 10MHz SPI-/QSPI™-/MICROWIRE
ble serial port.
The MAX11638/MAX11639 are available in 16-pin
QSOP packages. The MAX11642/MAX11643 are avail-
able in 24-pin QSOP packages. All four devices are
specified over the extended -40°C to +85°C tempera-
ture range.
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.
19-6035; Rev 0; 9/11
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National
Semiconductor Corp.
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX11638EEE+T
MAX11639EEE+T
MAX11642EEG+T
MAX11643EEG+T
PART
System Supervision
Data-Acquisition Systems
Industrial Control Systems
Patient Monitoring
Data Logging
Instrumentation
________________________________________________________________ Maxim Integrated Products
NUMBER
INPUTS
Ordering Information
OF
16
16
8
8
General Description
4.75 to 5.25
4.75 to 5.25
RANGE (V)
8-Bit, 16-/8-Channel, 300ksps ADCs
VOLTAGE
2.7 to 3.6
2.7 to 3.6
SUPPLY
Applications
with FIFO and Internal Reference
PIN
PACKAGE
16 QSOP
16 QSOP
24 QSOP
24 QSOP
®
-compati-
o Analog Multiplexer with Track-and-Hold (T/H)
o Single Supply
o Internal Reference
o External Reference: 1V to V
o 16-Entry First-In/First-Out (FIFO)
o Scan Mode, Internal Averaging, and Internal Clock
o Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing
o 10MHz 3-Wire SPI-/QSPI-/MICROWIRE-Compatible
o Small Packages
Pin Configurations continued at end of data sheet.
16 Channels (MAX11642/MAX11643)
8 Channels (MAX11638/MAX11639)
2.7V to 3.6V (MAX11639/MAX11643)
4.75V to 5.25V (MAX11638/MAX11642)
2.5V (MAX11639/MAX11643)
4.096V (MAX11638/MAX11642)
Codes Over Temperature
Interface
16-Pin QSOP (MAX11638/MAX11639)
24-Pin QSOP (MAX11642/MAX11643)
TOP VIEW
CNVST/AIN7
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
1
2
6
3
4
5
7
8
+
MAX11638
MAX11639
Pin Configurations
QSOP
DD
16
15
14
13
12
11
10
9
EOC
DOUT
DIN
SCLK
CS
V
GND
REF
DD
Features
1

Related parts for MAX11642EEG+T

MAX11642EEG+T Summary of contents

Page 1

... PART OF VOLTAGE INPUTS RANGE (V) MAX11638EEE+T 8 4.75 to 5.25 MAX11639EEE+T 8 2.7 to 3.6 MAX11642EEG+T 16 4.75 to 5.25 MAX11643EEG+T 16 2.7 to 3.6 Note: All devices are specified over the -40°C to +85°C operating temperature range. + Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. AutoShutdown is a trademark of Maxim Integrated Products, Inc. QSPI is a trademark of Motorola, Inc. ...

Page 2

ADCs with FIFO and Internal Reference ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD CS, SCLK, DIN, EOC, DOUT to GND.........-0. AIN0–AIN13, CNVST/AIN_, REF to GND ...........................................-0. Maximum Current into Any ...

Page 3

ADCs ELECTRICAL CHARACTERISTICS (continued +2.7V to +3.6V (MAX11639/MAX11643 4.8MHz (external clock 50% duty cycle unless otherwise noted. Typical values are at T MAX PARAMETER SYMBOL CONVERSION RATE Power-Up Time Acquisition ...

Page 4

ADCs with FIFO and Internal Reference ELECTRICAL CHARACTERISTICS (continued +2.7V to +3.6V (MAX11639/MAX11643 4.8MHz (external clock 50% duty cycle unless otherwise noted. Typical values are at T MAX PARAMETER SYMBOL ...

Page 5

ADCs TIMING CHARACTERISTICS (V = +2.7V to +3.6V (MAX11639/MAX11643 4.8MHz (external clock 50% duty cycle unless otherwise noted. Typical values are at T MAX PARAMETER SYMBOL SCLK Clock Period SCLK Pulse-Width High ...

Page 6

ADCs with FIFO and Internal Reference ( and V = 2.5V (MAX11639/MAX11643 REF C = 30pF 300ksps +25°C, unless otherwise noted.) LOAD SAMPLE A DIFFERENTIAL NONLINEARITY vs. OUTPUT CODE ...

Page 7

ADCs ( and V = 2.5V (MAX11639/MAX11643 REF C = 30pF 300ksps, T LOAD SAMPLE A SUPPLY CURRENT vs. SUPPLY VOLTAGE 2000 INTERNAL 1800 REFERENCE 1600 1400 1200 EXTERNAL REFERENCE 1000 ...

Page 8

ADCs with FIFO and Internal Reference ( and V = 2.5V (MAX11639/MAX11643 REF C = 30pF 300ksps +25°C, unless otherwise noted.) LOAD SAMPLE A INTERNAL REFERENCE VOLTAGE vs. SUPPLY ...

Page 9

ADCs ( and V = 2.5V (MAX11639/MAX11643 REF C = 30pF 300ksps, T LOAD SAMPLE A OFFSET ERROR vs. TEMPERATURE 0.8 MAX11638/MAX11642 0.4 0 -40 - TEMPERATURE (°C) ...

Page 10

ADCs with FIFO and Internal Reference MAX11638 MAX11642 MAX11639 MAX11643 (8 CHANNELS) (16 CHANNELS) 1–7 — — 1–15 8 — — ...

Page 11

ADCs CS t CSS0 t CL SCLK DIN t DOE DOUT Figure 1. Detailed Serial-Interface Timing Diagram CS DIN SCLK CNVST AIN0 AIN1 AIN15 REF Figure 2. Functional Diagram Detailed Description The MAX11638/MAX11639/MAX11642/MAX11643 ...

Page 12

ADCs with FIFO and Internal Reference Converter Operation The MAX11638/MAX11639/MAX11642/MAX11643 ADCs use a successive-approximation register (SAR) conver- sion technique and an on-chip T/H block to convert voltage signals into an 8-bit digital result. This single- ended configuration ...

Page 13

ADCs True Differential Analog Input T/H The equivalent circuit of Figure 3 shows the MAX11638/MAX11639/MAX11642/MAX11643’s input architecture. In track mode, a positive input capacitor is connected to AIN0–AIN15. A negative input capacitor is connected to GND. For ...

Page 14

ADCs with FIFO and Internal Reference Conversion Register Select active analog input channels per scan and scan modes by writing to the conversion register. Table 2 details channel selection and the four scan modes. Request a scan ...

Page 15

ADCs Table 3. Setup Register* BIT NAME BIT — 7 (MSB) Set to zero to select setup register. — 6 Set select setup register. Clock mode and CNVST configuration. Resets power-up. ...

Page 16

ADCs with FIFO and Internal Reference Table 4. Averaging Register* BIT NAME BIT — 7 (MSB) Set to zero to select averaging register. — 6 Set to zero to select averaging register. — 5 Set to 1 ...

Page 17

ADCs Power-Up Default State The MAX11638/MAX11639/MAX11642/MAX11643 power up with all blocks in shutdown, including the ref- erence. All registers power up in state 00000000, except for the setup register, which powers up in clock mode 10 (CKSEL1 ...

Page 18

ADCs with FIFO and Internal Reference CNVST (ACQUISITION1) (ACQUISITION2) CS (CONVERSION1) SCLK DOUT EOC REQUEST MULTIPLE CONVERSIONS BY SETTING CNVST LOW FOR EACH CONVERSION. Figure 5. Clock Mode 01 (CONVERSION BYTE) DIN CS SCLK DOUT EOC THE ...

Page 19

ADCs DIN (ACQUISITION1) CS SCLK DOUT EOC EXTERNALLY TIMED ACQUISITION, SAMPLING AND CONVERSION WITHOUT CNVST. Figure 7. Clock Mode 11 Initiate a conversion by writing a byte to the conversion register followed by 16 SCLK cycles. If ...

Page 20

ADCs with FIFO and Internal Reference Integral Nonlinearity Integral nonlinearity (INL) is the deviation of the values on an actual transfer function from a straight line. This straight line can be either a best-straight-line fit or a ...

Page 21

ADCs with FIFO and Internal Reference Pin Configurations (continued) TOP VIEW + AIN0 1 24 EOC AIN1 2 23 DOUT AIN2 3 22 DIN AIN3 4 21 SCLK MAX11642 AIN4 MAX11643 AIN5 6 19 ...

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 © 2011 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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