MAX1273EUA+T Maxim Integrated, MAX1273EUA+T Datasheet

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MAX1273EUA+T

Manufacturer Part Number
MAX1273EUA+T
Description
Analog to Digital Converters - ADC FAULT-PROTECTED 12-BIT ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1273EUA+T

Rohs
yes
Number Of Channels
1
Architecture
SAR
Conversion Rate
87 KSPs
Resolution
12 bit
Input Type
Single-Ended
Interface Type
QSPI, Serial (SPI, Microwire)
Operating Supply Voltage
4.75 V to 5.25 V
Maximum Power Dissipation
727 mW
Number Of Converters
1
The MAX1272/MAX1273 multirange 12-bit data-acquisi-
tion systems (DAS) operate with a single 5V supply. The
software-programmable analog input accepts a variety
of voltage ranges: ±10V, ±5V, 0 to 10V, 0 to 5V for the
MAX1272; ±V
MAX1273. The software-selectable extended analog
input range increases the effective dynamic range to 14
bits and provides the flexibility to interface 4–20mA pow-
ered sensors directly to a single 5V system. In addition,
the MAX1272 provides fault protection to ±12V. Other
features include a 5MHz track/hold (T/H) bandwidth,
87ksps throughput rate, and internal (4.096V) or external
(2.40V to 4.18V) reference.
The MAX1272/MAX1273 serial interfaces connect
directly to SPI/QSPI™/MICROWIRE
devices without any external logic.
Four software-programmable power-down modes
(delayed standby, immediate standby, delayed full power-
down, and immediate full power-down) provide low-cur-
rent shutdown between conversions. In standby mode, the
internal reference buffer remains active, thus eliminating
startup delay.
The MAX1272/MAX1273 are available in an 8-pin
µMAX
extended (-40°C to +85°C) temperature range.
19-2921; Rev 3; 12/11
Typical Application Circuit appears at end of data sheet.
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National Semiconductor Corp.
µMAX is a registered 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.
®
Industrial Control Systems
Data-Acquisition Systems
Robotics
Automatic Testing
Battery-Powered Instruments
Medical Instruments
package. Both devices are available in the
REF
, ±V
________________________________________________________________ Maxim Integrated Products
REF
General Description
with Software-Selectable Input Range
/2, 0 to V
REF
Applications
, 0 to V
®
-compatible
REF
Fault-Protected, 12-Bit ADCs
/2 for the
o Four Software-Selectable Input Ranges
o 12-Bit Resolution, No Missing Codes
o 5V Single-Supply Operation
o SPI/QSPI/MICROWIRE-Compatible 3-Wire
o 87ksps Sampling Rate
o ±12V Fault-Protected Analog Input (MAX1272)
o Internal (4.096V) or External (2.4V to 4.18V)
o Low Power
o Four Power-Down Modes
o 8-Pin µMAX Package
+ Denotes a lead(Pb)-free/RoHS-compliant package.
MAX1272EUA+ -40°C to +85°C
MAX1273EUA+
Interface
Reference
MAX1272: 0 to 10V, 0 to 5V, ±10V, ±5V
MAX1273: 0 to V
±V
1.5mA at 87ksps
0.4mA at 10ksps
0.2mA at 1ksps
TOP VIEW
PART
REF
/2
SCLK
VDD
GND
-40°C to +85°C
DIN
RANGE
1
2
3
4
REF
TEMP
Ordering Information
+
, 0 to V
MAX1272
MAX1273
µMAX
Pin Configuration
REF
PIN-
PACKAGE
8 µMAX
8 µMAX
/2, ±V
7
5
8
6
DOUT
CS
REF
AIN
Features
REF
,
(LSB)
INL
±1
±1
1

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MAX1273EUA+T Summary of contents

Page 1

... Typical Application Circuit appears at end of data sheet. QSPI is a trademark of Motorola, Inc. MICROWIRE is a registered trademark of National Semiconductor Corp. µMAX is a registered 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’ ...

Page 2

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD AIN to GND (MAX1272) ...................................................... ±12V AIN to GND (MAX1273) ........................................................ ±6V DOUT, CS, DIN, SCLK, REF to GND..........-0. Maximum Current ...

Page 3

Software-Selectable Input Range ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V, unipolar/bipolar input range, external reference mode 50% duty cycle 50pF -40°C to +85°C, unless otherwise noted. Typical values are at T LOAD ...

Page 4

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V, unipolar/bipolar input range, external reference mode 50% duty cycle 50pF -40°C to +85°C, unless otherwise noted. Typical values are ...

Page 5

Software-Selectable Input Range TIMING CHARACTERISTICS (V = 4.75V to 5.25V, unipolar/bipolar input range, external reference mode 50% duty cycle 50pF -40°C to +85°C, unless otherwise noted. Typical values are at T LOAD A ...

Page 6

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range (Typical operating circuit, BIP = RNG = 1, V 50% duty cycle, 87ksps +25°C, unless otherwise noted.) A STANDBY SUPPLY CURRENT vs. SUPPLY VOLTAGE 1 AIN 0.9 0.8 ...

Page 7

Software-Selectable Input Range (Typical operating circuit, BIP = RNG = 1, V 50% duty cycle, 87ksps +25°C, unless otherwise noted.) A FFT PLOT 0 -20 -40 -60 -80 -100 -120 -140 -160 FREQUENCY ...

Page 8

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range PIN NAME 1 SCLK Serial Clock Input. Clocks data in and out of serial interface. SCLK sets the conversion speed. 2 DIN Serial Data Input. Data clocks in on the rising edge of ...

Page 9

Software-Selectable Input Range V DD GND SIGNAL AIN CONDITIONING REF 4.096V REFERENCE Figure 2. Simplified Block Diagram Table 1. Control-Byte Format BIT 7 BIT 6 BIT 5 (MSB) START RNG BIP BIT NAME 7 (MSB) START Write a logic ...

Page 10

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range Table 2. Input Range and Polarity Selection for MAX1272 INPUT RANGE RNG ± 10V 1 1 ±10V Table 3. Input Range and Polarity Selection for MAX1273 ...

Page 11

Software-Selectable Input Range CS t CSS t CSH SCLK DIN t DV DOUT Figure 4. Detailed Serial Interface Timing CS DIN HI-Z DOUT SCLK ACQUISITION 4 SCLKs Figure 5. Conversion Timing, 21 Clocks/Conversion ______________________________________________________________________________________ Fault-Protected, ...

Page 12

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range CS CONTROL BYTE 0 DIN HI-Z DOUT SCLK ACQUISITION 4 SCLKs Figure 6. Conversion Timing, 16 Clocks/Conversion Starting a Conversion The MAX1272/MAX1273 use the serial clock to complete an acquisition. The falling edge ...

Page 13

... MODE0 of the control byte is 0, the device remains powered up until after the current conversion ends (Figure 8). On the other hand, if MODE0 = 1, the device powers down on the falling edge of the eighth AutoShutdown is a trademark of Maxim Integrated Products, Inc. ______________________________________________________________________________________ Fault-Protected, 12-Bit ADCs C ...

Page 14

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range CS DIN HI-Z DOUT SCLK ACQUISITION 4 SCLKs Figure 8. Delayed Power-Down Timing CS DIN HI-Z DOUT SCLK ACQUISITION 4 SCLKs POWERED UP Figure 9. Immediate Power-Down Timing SPI and MICROWIRE Interface When ...

Page 15

Software-Selectable Input Range Using the high-speed QSPI interface with CPOL = 0 and CPHA = 0, the MAX1272/MAX1273 support a max- imum f of 1.4MHz. Figure 11 shows the MAX1272/ SCLK MAX1273 connected to a QSPI master. PIC16 with ...

Page 16

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range Table 5. Detailed SSPCON Register Contents—PIC16/PIC17 CONTROL BIT WCOL BIT7 X Write Collision Detection Bit SSPOV BIT6 X Receive Overflow Detection Bit Synchronous Serial-Port Enable Bit: SSPEN BIT5 1 0: Disables serial port ...

Page 17

Software-Selectable Input Range Layout, Grounding, and Bypassing For best performance, use printed circuit (PC) boards. Wire-wrap configurations are not recommended since the layout should ensure proper separation of analog and digital traces. Do not run analog and digital lines ...

Page 18

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range SUPPLIES 5Ω 0.1μF V GND DD MAX1272 MAX1273 *OPTIONAL Figure 14. Power-Supply Grounding Connections Chip Information PROCESS: BiCMOS 18 ______________________________________________________________________________________ GND LOGIC 5V DGND DIGITAL CIRCUITRY 1.0μF ...

Page 19

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2011 Maxim Integrated Products ...

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