MAX1068CEEG-T Maxim Integrated, MAX1068CEEG-T Datasheet

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MAX1068CEEG-T

Manufacturer Part Number
MAX1068CEEG-T
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1068CEEG-T

Number Of Channels
8
Architecture
SAR
Conversion Rate
200 KSPs
Resolution
14 bit
Input Type
Single-Ended
Snr
84 dB
Interface Type
QSPI, Serial (SPI, Microwire)
Operating Supply Voltage
2.7 V to 5.25 V, 4.75 V to 5.25 V
Maximum Operating Temperature
+ 85 C
Package / Case
QSOP-24
Maximum Power Dissipation
762 mW
Minimum Operating Temperature
- 40 C
Number Of Converters
1
Voltage Reference
4.096 V
The MAX1067/MAX1068 low-power, multichannel, 14-
bit analog-to-digital converters (ADCs) feature a suc-
cessive-approximation ADC, integrated +4.096V
reference, a reference buffer, an internal oscillator,
automatic power-down, and a high-speed SPI™/
QSPI™/MICROWIRE™-compatible interface. The
MAX1067/MAX1068 operate with a single +5V analog
supply and feature a separate digital supply, allowing
direct interfacing with +2.7V to +5.5V digital logic.
The MAX1067/MAX1068 consume only 3.6mA (AV
DV
ence. AutoShutdown™ reduces the supply current to
185µA at 10ksps and to less than 10µA at reduced sam-
pling rates.
The MAX1067 includes a 4-channel input multiplexer, and
the MAX1068 accepts up to eight analog inputs.
In addition, digital signal processor (DSP)-initiated con-
versions are simplified with the DSP frame-sync input and
output featured in the MAX1068. The MAX1068 includes a
data-bit transfer input to select between 8-bit-wide or 16-
bit-wide data-transfer modes. Both devices feature a scan
mode that converts each channel sequentially or one
channel continuously.
Excellent dynamic performance and low power, com-
bined with ease of use and an integrated reference,
make the MAX1067/MAX1068 ideal for control and data-
acquisition operations or for other applications with
demanding power consumption and space require-
ments. The MAX1067 is available in a 16-pin QSOP
package, and the MAX1068 is available in a 24-pin
QSOP package. Both devices are guaranteed over the
commercial (0°C to +70°C) and extended (-40°C to
+85°C) temperature ranges. Use the MAX1168 evalua-
tion kit to evaluate the MAX1068.
19-2955; Rev 1; 8/07
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
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.
Multichannel, 14-Bit, 200ksps Analog-to-Digital
DD
= +5V) at 200ksps when using an external refer-
Motor Control
Industrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Thermocouple Measurements
Accelerometer Measurements
________________________________________________________________ Maxim Integrated Products
General Description
Applications
DD
=
♦ 14-Bit Resolution, ±0.5 LSB INL and
♦ +5V Single-Supply Operation
♦ Adjustable Logic Level (+2.7V to +5.25V)
♦ Input Voltage Range: 0 to V
♦ Internal (+4.096V) or External (+3.8V to AV
♦ Internal Track/Hold, 4MHz Input Bandwidth
♦ Internal or External Clock
♦ SPI/QSPI/MICROWIRE-Compatible Serial
♦ 8-Bit-Wide or 16-Bit-Wide Data-Transfer Mode
♦ 4-Channel (MAX1067) or 8-Channel (MAX1068)
♦ Low Power
♦ Small Package Size
Ordering Information continued at end of data sheet.
Pin Configurations appear at end of data sheet.
MAX1067ACEE
MAX1067BCEE
MAX1067CCEE
MAX1067AEEE
MAX1067BEEE
MAX1067CEEE
±1 LSB DNL (max)
Reference
Interface, MAX1068 Performs DSP-Initiated
Conversions
(MAX1068 Only)
Input Mux
Scan Mode Sequentially Converts Multiple
Channels or One Channel Continuously
3.6mA at 200ksps
1.85mA at 100ksps
185µA at 10ksps
0.6µA in Full Power-Down Mode
16-Pin QSOP (MAX1067)
24-Pin QSOP (MAX1068)
PART
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
Converters
REF
PIN-
PACKAGE
16 QSOP
16 QSOP
16 QSOP
16 QSOP
16 QSOP
16 QSOP
Features
DD
(LSB)
±0.5
±0.5
)
INL
±1
±2
±1
±2
1

Related parts for MAX1068CEEG-T

MAX1068CEEG-T Summary of contents

Page 1

... Accelerometer Measurements SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. AutoShutdown is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products 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. ...

Page 2

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0. DGND.........................................................-0.3V to +6V DD DGND to AGND.....................................................-0.3V to +0.3V AIN_, REF, REFCAP to AGND..................-0.3V to (AV CS, DSEL, DSPR, DIN to DGND ...................-0.3V ...

Page 3

Multichannel, 14-Bit, 200ksps Analog-to-Digital ELECTRICAL CHARACTERISTICS (continued) ( +4.75V to +5.25V SCLK = +4.096V unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Acquisition ...

Page 4

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters ELECTRICAL CHARACTERISTICS (continued) ( +4.75V to +5.25V SCLK = +4.096V unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL ...

Page 5

Multichannel, 14-Bit, 200ksps Analog-to-Digital ELECTRICAL CHARACTERISTICS (continued) ( +4.75V to +5.25V SCLK = +4.096V unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL I ...

Page 6

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters TIMING CHARACTERISTICS (Figures and 16) (AV = +4.75V to +5.25V +2.7V to +5.25V (200ksps), external V = +4.096V, T REF A PARAMETER SYMBOL Acquisition Time t SCLK ...

Page 7

Multichannel, 14-Bit, 200ksps Analog-to-Digital ( +5V 4.8MHz SCLK INL vs. CODE 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 0 4096 8192 12,288 16,384 CODE SINAD vs. FREQUENCY 90 ...

Page 8

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters ( +5V 4.8MHz SCLK DIGITAL SUPPLY CURRENT vs. DIGITAL SUPPLY VOLTAGE 200ksps S 1.8 DOUT ...

Page 9

Multichannel, 14-Bit, 200ksps Analog-to-Digital ( +5V 4.8MHz SCLK OFFSET ERROR vs. SUPPLY VOLTAGE 200 V = +4.096V REF 150 100 50 0 -50 -100 -150 -200 4.75 4.85 4.95 5.05 5.15 AV ...

Page 10

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters PIN NAME MAX1067 MAX1068 1 3 DOUT 2 4 SCLK 3 5 DIN EOC AIN0 6 8 AIN1 7 9 AIN2 8 10 AIN3 9 15 REF 10 16 REFCAP 11 ...

Page 11

Multichannel, 14-Bit, 200ksps Analog-to-Digital PIN NAME MAX1067 MAX1068 — 13 AIN6 — 14 AIN7 — 23 DSPX — 24 N.C. DOUT DOUT C = 30pF 1mA LOAD DGND HIGH Figure 1. ...

Page 12

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters REFERENCE REF AGND AIN0 AIN1 ANALOG-INPUT MULTIPLEXER AIN2 AIN3 SCLK OSCILLATOR CS DIN Figure 3. MAX1067 Functional Diagram During the acquisition, the analog input (AIN_) charges capacitor the end of the acquisition ...

Page 13

Multichannel, 14-Bit, 200ksps Analog-to-Digital REF AGND AIN0 AIN1 AIN2 AIN3 ANALOG-INPUT MULTIPLEXER AIN4 AIN5 AIN6 AIN7 SCLK OSCILLATOR CS DSEL DSPR DIN Figure 4. MAX1068 Functional Diagram that includes a longer acquisition time (11.5 clock cycles). Longer acquisition times are ...

Page 14

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters AIN0 ANALOG AIN1 INPUTS AIN2 AIN3 DIN DIN MAX1067 REF 1µF AV +5V DD 0.1µF DV +5V DD 0.1µF Figure 5. MAX1067 Typical Operating Circuit REF MUX R DSON CAPACITIVE TRACK AIN_ DAC C MUX ...

Page 15

Multichannel, 14-Bit, 200ksps Analog-to-Digital Table 2. Channel Select BIT7 BIT6 BIT5 CH SEL2 CH SEL1 CH SEL0 ...

Page 16

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters t CSW CS t CSS SCLK DIN t DV DOUT Figure 8. Detailed SPI Interface Timing CS COMPLETE CONVERSION SEQUENCE DOUT CONVERSION 0 POWERED UP POWERED DOWN Figure 9. Shutdown Sequence ...

Page 17

Multichannel, 14-Bit, 200ksps Analog-to-Digital CS 1 SCLK MSB DIN DOUT DSPR* DSEL* ADC STATE t ACQ *MAX1068 ONLY Figure 10. SPI External Clock Mode, 8-Bit Data-Transfer Mode, Conversion Timing minimum high and low times are at least 93ns. External clock-mode ...

Page 18

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters SCLK MSB LSB DIN 0 DOUT DSPR DSEL ADC STATE t ACQ , X = DON T CARE Figure 11. SPI External Clock Mode, 16-Bit Data-Transfer Mode, Conversion Timing (MAX1068 Only) CS ...

Page 19

Multichannel, 14-Bit, 200ksps Analog-to-Digital • • • • • • SCLK INTERNAL CLK DIN DATA DOUT EOC ADC STATE CONFIGURATION , X = DON T CARE DSPR ...

Page 20

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters Internal Clock 16-Bit-Wide Data-Transfer and Scan Mode (MAX1068 Only) Force DSPR high and DSEL low for the SPI/QSPI/ MICROWIRE-interface mode. The falling edge of CS wakes the analog circuitry and allows SCLK to clock in ...

Page 21

Multichannel, 14-Bit, 200ksps Analog-to-Digital DSP 8-Bit-Wide Data-Transfer Mode (External Clock Mode, MAX1068 Only) Figure 16 shows the DSP-interface timing diagram. Logic low at DSPR on the falling edge of CS enables DSP interface mode. After the MAX1068 enters DSP mode, ...

Page 22

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters 4.8MHz (the maximum clock frequency). For lower clock frequencies, ensure the minimum high and low times are at least 93ns. External-clock-mode conver- sions with SCLK rates less than 125kHz can reduce accuracy due to leakage ...

Page 23

Multichannel, 14-Bit, 200ksps Analog-to-Digital Output Coding and Transfer Function The data output from the MAX1067/MAX1068 is straight binary. Figure 19 shows the nominal transfer function. Code transitions occur halfway between suc- cessive integer LSB values (V REF 1 LSB = ...

Page 24

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters Avoid degrading dynamic performance by choosing an amplifier with distortion much less than the total harmonic distortion of the MAX1067/MAX1068 at the frequencies of interest (THD = -98db at 1kHz). If the chosen amplifier has ...

Page 25

Multichannel, 14-Bit, 200ksps Analog-to-Digital Using the high-speed QSPI interface with CPOL = 0 and CPHA = 0, the MAX1067/MAX1068 support a maximum f of 4.8MHz. Figure 21a shows the SCLK MAX1067/MAX1068 connected to a QSPI master and Figure 21b shows ...

Page 26

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters Table 8. Detailed SSPSTAT Register Contents CONTROL BIT SMP BIT7 CKE BIT6 D/A BIT5 P BIT4 S BIT3 R/W BIT2 UA BIT1 BF BIT0 X = Don’t care SCLK DOUT CS MAX1067 MAX1068 ...

Page 27

Multichannel, 14-Bit, 200ksps Analog-to-Digital EXTERNAL CLOCK SCLK TFS RFS DSP DT DR FL1 Figure 23. DSP Interface Connection Integral Nonlinearity Integral nonlinearity (INL) is the deviation of the values on an actual transfer function from a straight line. This straight ...

Page 28

Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters Total Harmonic Distortion Total harmonic distortion (THD) is the ratio of the RMS sum of the first five harmonics of the input signal to the fundamental itself. This is expressed as: ⎡ ⎛ ...

Page 29

... Ordering Information (continued) PART TEMP RANGE MAX1068ACEG 0°C to +70°C MAX1068BCEG 0°C to +70°C MAX1068CCEG 0°C to +70°C MAX1068AEEG* -40°C to +85°C MAX1068BEEG* -40°C to +85°C MAX1068CEEG* -40°C to +85°C *Future product—contact factory for availability. TOP VIEW DOUT 1 SCLK 2 DIN 3 EOC 4 AIN0 ...

Page 30

... 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. 30 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Package Information PACKAGE OUTLINE, QSOP .150" ...

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