MAX1243BCSA+ Maxim Integrated Products, MAX1243BCSA+ Datasheet

IC ADC SRL 10BIT 2.7-5.25V 8SOIC

MAX1243BCSA+

Manufacturer Part Number
MAX1243BCSA+
Description
IC ADC SRL 10BIT 2.7-5.25V 8SOIC
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1243BCSA+

Number Of Bits
10
Sampling Rate (per Second)
73k
Data Interface
MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
471mW
Voltage Supply Source
Single Supply
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Number Of Adc Inputs
1
Architecture
SAR
Conversion Rate
73 KSPs
Resolution
10 bit
Input Type
Voltage
Interface Type
3-Wire (SPI, QSPI, MICROWIRE)
Voltage Reference
External
Supply Voltage (max)
5.25 V
Supply Voltage (min)
2.7 V
Maximum Power Dissipation
471 mW
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1242/MAX1243 are low-power, 10-bit analog-
to-digital converters (ADCs) available in 8-pin pack-
ages. They operate with a single +2.7V to +5.25V
supply and feature a 7.5µs successive-approximation
ADC, a fast track/hold (1.5µs), an on-chip clock, and a
high-speed, 3-wire serial interface.
Power consumption is only 3mW (V
73ksps maximum sampling speed. A 2µA shutdown
mode reduces power at slower throughput rates.
The MAX1242 has an internal 2.5V reference, while the
MAX1243 requires an external reference. The MAX1243
accepts signals from 0V to V
input range includes the positive supply rail. An exter-
nal clock accesses data from the 3-wire interface,
which connects directly to standard microcontroller I/O
ports. The interface is compatible with SPI™, QSPI™,
and Microwire™.
Excellent AC characteristics and very low power com-
bined with ease of use and small package size make
these converters ideal for remote-sensor and data-
acquisition applications, or for other circuits with
demanding power consumption and space require-
ments. The MAX1242/MAX1243 are available in 8-pin
DIP and SO packages.
Isolated Data Acquisition
19-1156; Rev 2; 6/98
Portable Data Logging
Test Equipment
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
__________________General Description
TOP VIEW
SHDN
V
REF
AIN
DD
________________________________________________________________ Maxim Integrated Products
1
2
3
4
MAX1242
MAX1243
DIP/SO
Pin Configuration
Process Control Monitoring
Temperature Measurement
+2.7V to +5.25V, Low-Power, 10-Bit
REF
, and the reference
Applications
8
7
6
5
DD
SCLK
CS
DOUT
GND
= 3V) at the
Ordering Information continued at end of data sheet.
Note: Order the MAX1242A in place of the MAX1242C. Order the
MAX1242B in place of the MAX1242D.
_________________Ordering Information
________________Functional Diagram
________________________________Features
MAX1242ACPA
MAX1242BCPA
MAX1242ACSA
MAX1242BCSA
MAX1242AEPA
MAX1242BEPA
SCLK
SHDN
+2.7V to +5.25V Single-Supply Operation
10-Bit Resolution
Internal 2.5V Reference (MAX1242)
Small Footprint: 8-Pin DIP and SO Packages
Low Power: 3.7mW (73ksps, MAX1242)
Internal Track/Hold
SPI™/QSPI™/Microwire™ 3-Wire Serial Interface
Pin-Compatible 12-Bit Upgrades:
MAX1240/MAX1241
REF
AIN
CS
PART
Serial ADCs in SO-8
7
8
3
2
4
MAX1242 ONLY
REFERENCE
CONTROL
3mW (73ksps, MAX1243)
66µW (1ksps, MAX1243)
5µW (power-down mode)
-40°C to +85°C
-40°C to +85°C
LOGIC
2.5V
T/H
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
GND
V
10-BIT
DD
SAR
1
5
CLOCK
INT
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
8 Plastic DIP
8 Plastic DIP
PACKAGE
MAX1242
MAX1243
PIN-
REGISTER
OUTPUT
SHIFT
6
(LSB)
±
±1
±
±1
±
±1
INL
DOUT
1
1
1
/
/
/
2
2
2
1

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MAX1243BCSA+ Summary of contents

Page 1

... REF 4 DIP/SO SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. Serial ADCs in SO-8 ________________________________Features +2 ...

Page 2

Low-Power, 10-Bit Serial ADCs in SO-8 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

Low-Power, 10-Bit ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.25V; 73ksps SCLK reference 2.5V applied to REF pin; T REF PARAMETER SYMBOL INTERNAL REFERENCE (MAX1242 only) REF Output Voltage REF Short-Circuit Current REF ...

Page 4

Low-Power, 10-Bit Serial ADCs in SO-8 TIMING CHARACTERISTICS (V = +2.7V to +5.25V, circuit of Figure PARAMETER SYMBOL Acquisition Time t ACQ SCLK Fall to Output Data Valid Fall to Output ...

Page 5

Low-Power, 10-Bit __________________________________________Typical Operating Characteristics (V = +3.0V 2.5V 2.1MHz, C REF DD SCLK SUPPLY CURRENT vs. SUPPLY VOLTAGE 2.00 1. 20pF LOAD C = 50pF LOAD 1.50 MAX1242 1.25 C ...

Page 6

Low-Power, 10-Bit Serial ADCs in SO-8 ______________________________________________________________Pin Description PIN NAME 1 V Positive Supply Voltage: +2.7V to +5.25V DD 2 AIN Sampling Analog Input Three-Level Shutdown Input. Pulling SHDN low shuts the MAX1242/MAX1243 down ...

Page 7

Low-Power, 10-Bit +2.7V to +5.25V 4 SCLK DD 2 ANALOG INPUT AIN REF MAX1242 MAX1243 3 SHUTDOWN SHDN DOUT INPUT 4 REFERENCE REF GND INPUT C* MAX1243 *4.7 ...

Page 8

Low-Power, 10-Bit Serial ADCs in SO-8 Serial Interface Initialization after Power-Up and Starting a Conversion When power is first applied, and if SHDN is not pulled low, it takes the fully discharged 4.7µF reference bypass capacitor up ...

Page 9

Low-Power, 10-Bit CS SCLK DOUT CONVERSION INTERFACE IDLE IN PROGRESS TRACK/HOLD TRACK HOLD STATE 7 CONV CYCLE TIME Figure 8a. Interface Timing Sequence CS SCLK DOUT CONVERSION INTERFACE IDLE IN PROGRESS TRACK/HOLD TRACK HOLD ...

Page 10

Low-Power, 10-Bit Serial ADCs in SO-8 The actual conversion does not require the external clock. This allows the conversion result to be read back at the µP’s convenience at any clock rate up to 2.1MHz. The clock ...

Page 11

Low-Power, 10-Bit SCLK CS t CONV D9 D8 DOUT MSB EOC Figure 12. SPI/Microwire Serial-Interface Timing (CPOL = CPHA = 0) SCLK CS t CONV DOUT EOC Figure 13. QSPI Serial-Interface Timing (CPOL = CPHA = 0) ...

Page 12

... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products ___________________Chip Information ...

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