MAX1284BESA+ Maxim Integrated Products, MAX1284BESA+ Datasheet

IC ADC 12BIT 400KSPS 8-SOIC

MAX1284BESA+

Manufacturer Part Number
MAX1284BESA+
Description
IC ADC 12BIT 400KSPS 8-SOIC
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1284BESA+

Number Of Bits
12
Sampling Rate (per Second)
400k
Data Interface
MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
2.5mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Number Of Adc Inputs
1
Architecture
SAR
Conversion Rate
400 KSPs
Resolution
12 bit
Interface Type
Serial
Voltage Reference
Internal 2.5 V
Supply Voltage (max)
5 V
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1284/MAX1285 12-bit analog-to-digital con-
verters (ADCs) combine a high-bandwidth track/hold
(T/H), a serial interface with high conversion speed, an
internal +2.5V reference, and low power consumption.
The MAX1284 operates from a single +4.5V to +5.5V
supply. The MAX1285 operates from a single +2.7V to
+3.6V supply.
The 3-wire serial interface connects directly to
SPI™/QSPI™/ MICROWIRE™ devices without external
logic. The devices use an external serial-interface clock
to perform successive-approximation analog-to-digital
conversions.
Low power, ease of use, and small package size make
these converters ideal for remote-sensor and data-acqui-
sition applications or for other circuits with demanding
power consumption and space requirements. The
MAX1284/MAX1285 are available in 8-pin SO packages.
These devices are pin-compatible, higher-speed ver-
sions of the MAX1240/MAX1241. Refer to the respec-
tive data sheets for more information.
19-1687; Rev 2; 12/10
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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.
TOP VIEW
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
400ksps/300ksps, Single-Supply, Low-Power,
Serial 12-Bit ADCs with Internal Reference
SHDN
V
REF
AIN
DD
________________________________________________________________ Maxim Integrated Products
1
2
3
4
+
General Description
MAX1284
MAX1285
SO
Pin Configuration
Applications
8
7
6
5
SCLK
CS
DOUT
GND
o Single-Supply Operation
o ±1LSB (max) DNL, ±1LSB (max) INL
o 400ksps Sampling Rate (MAX1284)
o Internal Track/Hold
o +2.5V Internal Reference
o Low Power: 2.5mA (400ksps)
o SPI/QSPI/MICROWIRE 3-Wire Serial-Interface
o Pin-Compatible, High-Speed Upgrades to
o 8-Pin SO Package
____________________________Features
+ Denotes a lead(Pb)-free/RoHS-compliant package.
MAX1284BCSA+
MAX1284BESA+ -40°C to +85°C 8 SO
MAX1285BCSA+
MAX1285BESA+ -40°C to +85°C 8 SO
SHDN
SCLK
MAX1240/MAX1241
REF
AIN
CS
+4.5V to +5.5V (MAX1284)
+2.7V to +3.6V (MAX1285)
PART
7
8
3
2
4
+2.5V REFERENCE
CONTROL
LOGIC
T/H
TEMP RANGE
0°C to +70°C
0°C to +70°C
Ordering Information
Functional Diagram
GND
5
V
12-BIT
DD
SAR
1
CLOCK
INT
PACKAGE
8 SO
8 SO
PIN-
MAX1284
MAX1285
REGISTER
OUTPUT
SHIFT
VOLTAGE (V)
2.7 to 3.6
2.7 to 3.6
SUPPLY
5
5
6
DOUT
1

Related parts for MAX1284BESA+

MAX1284BESA+ Summary of contents

Page 1

... Sampling Rate (MAX1284) o Internal Track/Hold o +2.5V Internal Reference o Low Power: 2.5mA (400ksps) o SPI/QSPI/MICROWIRE 3-Wire Serial-Interface o Pin-Compatible, High-Speed Upgrades to MAX1240/MAX1241 o 8-Pin SO Package Applications PART MAX1284BCSA+ MAX1284BESA+ -40°C to +85° MAX1285BCSA+ MAX1285BESA+ -40°C to +85° Denotes a lead(Pb)-free/RoHS-compliant package SCLK 8 8 SCLK 7 ...

Page 2

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +6V DD AIN to GND................................................-0. REF to GND ...............................................-0. Digital Inputs to GND...............................................-0.3V to +6V DOUT to GND............................................-0.3V to ...

Page 3

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1284 (continued +4.5V to +5.5V 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle (400ksps), 4.7µF capacitor at REF SCLK T unless otherwise noted. Typical values ...

Page 4

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1285 (continued +2.7V to +3.6V 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), 4.7µF capacitor at REF SCLK T unless otherwise noted. Typical values ...

Page 5

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference TIMING CHARACTERISTICS—MAX1284 (Figures +4.5V to +5.5V MIN MAX, PARAMETER SYMBOL SCLK Period t SCLK Pulse-Width High t SCLK ...

Page 6

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference __________________________________________Typical Operating Characteristics (MAX1284 +5.0V 6.4MHz, MAX1285 SCLK T = +25°C, unless otherwise noted.) A INTEGRAL NONLINEARITY vs. DIGITAL OUTPUT CODE 0.4 0.3 0.2 0.1 ...

Page 7

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference (MAX1284 +5.0V 6.4MHz, MAX1285 SCLK T = +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE 3.00 CODE = 1111 1111 1111 CONVERTING = ...

Page 8

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference DOUT 6kΩ DGND a) High and Figure 1. Load Circuits for DOUT Enable Time DOUT 6kΩ DGND High-Z OH Figure ...

Page 9

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference +5V OR +3V 10μF 0.1μ SCLK DD 2 ANALOG INPUT MAX1284 AIN MAX1285 REF 3 SHUTDOWN SHDN DOUT INPUT 4 REF GND 4.7μF Figure 3. Typical ...

Page 10

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference To start a conversion, pull CS low. At CS’s falling edge, the T/H enters its hold mode and a conversion is initiat- ed. Data can then be shifted out serially with ...

Page 11

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference 1. 4.7μF REF 1.25 1.00 0.75 0.50 0.25 0 0.0001 0.001 0.01 0.1 TIME IN SHUTDOWN (s) Figure 7. Reference Power-Up vs. Time in Shutdown CS 1 SCLK DOUT ...

Page 12

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference OUTPUT CODE FULL-SCALE TRANSITION 11…111 11…110 11…101 00…011 00…010 00…001 00…000 INPUT VOLTAGE (LSBs) Figure 10. Unipolar Transfer Function, Full Scale (FS Zero Scale (ZS) ...

Page 13

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference Figure 14 shows the recommended system ground con- nections. Establish a single-point analog ground (“star” ground point) at GND, separate from the logic ground. Connect all other analog grounds and DGND ...

Page 14

Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference SUPPLIES 10Ω 4.7μF 0.1μ GND MAX1284 MAX1285 *OPTIONAL Figure 14. Power-Supply Grounding Condition Aperture jitter ( the sample-to-sample variation in AJ the time ...

Page 15

... 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 ____________________ 15 © 2010 Maxim Integrated Products 2 ...

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