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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1112 Datasheet

+5V / Low-Power / Multi-Channel / Serial 8-Bit ADCs

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MAX1112 pdf
19-1231; Rev 1; 10/98
EVAALVUAAILTAIOBNLEKIT
+5V, Low-Power, Multi-Channel,
Serial 8-Bit ADCs
General Description
The MAX1112/MAX1113 are low-power, 8-bit, 8-chan-
nel analog-to-digital converters (ADCs) that feature an
internal track/hold, voltage reference, clock, and serial
interface. They operate from a single +4.5V to +5.5V
supply and consume only 135µA while sampling at
rates up to 50ksps. The MAX1112’s 8 analog inputs
and the MAX1113’s 4 analog inputs are software-con-
figurable, allowing unipolar/bipolar and single-
ended/differential operation.
Successive-approximation conversions are performed
using either the internal clock or an external serial-inter-
face clock. The full-scale analog input range is deter-
mined by the 4.096V internal reference, or by an
externally applied reference ranging from 1V to VDD.
The 4-wire serial interface is compatible with the SPI™,
QSPI™, and MICROWIRE™ serial-interface standards.
A serial-strobe output provides the end-of-conversion
signal for interrupt-driven processors.
The MAX1112/MAX1113 have a software-program-
mable, 2µA automatic power-down mode to minimize
power consumption. Using power-down, the supply
current is reduced to 13µA at 1ksps, and only 82µA at
10ksps. Power-down can also be controlled using the
SHDN input pin. Accessing the serial interface automat-
ically powers up the device.
The MAX1112 is available in 20-pin SSOP and DIP
packages. The MAX1113 is available in small 16-pin
QSOP and DIP packages.
____________________________Features
o +4.5V to +5.5V Single Supply
o Low Power: 135µA at 50ksps
13µA at 1ksps
o 8-Channel Single-Ended or 4-Channel Differential
Inputs (MAX1112)
o 4-Channel Single-Ended or 2-Channel Differential
Inputs (MAX1113)
o Internal Track/Hold; 50kHz Sampling Rate
o Internal 4.096V Reference
o SPI/QSPI/MICROWIRE-Compatible Serial Interface
o Software-Configurable Unipolar or Bipolar Inputs
o Total Unadjusted Error: ±1LSB (max)
±0.3LSB (typ)
Ordering Information
PART
MAX1112CPP
MAX1112CAP
MAX1112C/D
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
20 Plastic DIP
20 SSOP
Dice*
*Dice are specified at TA = +25°C, DC parameters only.
Ordering Information continued at end of data sheet.
Functional Diagram
________________________Applications
Portable Data Logging
Hand-Held Measurement Devices
Medical Instruments
System Diagnostics
Solar-Powered Remote Systems
4–20mA-Powered Remote
Data-Acquisition Systems
Pin Configurations appear at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
CS
SCLK
DIN
SHDN
CH0
CH1
CH2
CH3
CH4*
CH5*
CH6*
CH7*
COM
REFOUT
REFIN
INPUT
SHIFT
REGISTER
CONTROL
LOGIC
INT
CLOCK
ANALOG
INPUT
MUX
T/H
+4.096V
REFERENCE
OUTPUT
SHIFT
REGISTER
CLOCK
IN 8-BIT
SAR ADC
OUT
REF
MAX1112
MAX1113
*MAX1112 ONLY
DOUT
SSTRB
VDD
DGND
AGND
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1112 Datasheet

+5V / Low-Power / Multi-Channel / Serial 8-Bit ADCs

No Preview Available !

MAX1112 pdf
+5V, Low-Power, Multi-Channel,
Serial 8-Bit ADCs
ABSOLUTE MAXIMUM RATINGS
VDD to AGND ..............................................................-0.3V to 6V
AGND to DGND .......................................................-0.3V to 0.3V
CH0–CH7, COM, REFIN,
REFOUT to AGND ...................................-0.3V to (VDD + 0.3V)
Digital Inputs to DGND ...............................................-0.3V to 6V
Digital Outputs to DGND ............................-0.3V to (VDD + 0.3V)
Continuous Power Dissipation (TA = +70°C)
16 Plastic DIP (derate 10.53mW/°C above +70°C) ......842mW
16 QSOP (derate 8.30mW/°C above +70°C) ................667mW
16 CERDIP (derate 10.00mW/°C above +70°C) ..........800mW
20 Plastic DIP (derate 11.11mW/°C above +70°C) ......889mW
20 SSOP (derate 8.00mW/°C above +70°C) ................640mW
20 CERDIP (derate 11.11mW/°C above +70°C) ..........889mW
Operating Temperature Ranges
MAX1112C_P/MAX1113C_E................................0°C to +70°C
MAX1112E_P/MAX1113E_E .............................-40°C to +85°C
MAX1112MJP/MAX1113MJE..........................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +4.5V to +5.5V; unipolar input mode; COM = 0V; fSCLK = 500kHz, external clock (50% duty cycle); 10 clocks/conversion
cycle (50ksps); 1µF capacitor at REFOUT; TA = TMIN to TMAX; unless otherwise noted.)
PARAMETER
DC ACCURACY
Resolution
Relative Accuracy (Note 1)
Differential Nonlinearity
Offset Error
Gain Error (Note 2)
Gain Temperature Coefficient
Total Unadjusted Error
SYMBOL
CONDITIONS
INL
DNL
No missing codes over temperature
Internal or external reference
External reference, 4.096V
TUE MAX111_C/E
MIN TYP MAX UNITS
8 Bits
±0.1 ±0.5 LSB
±1 LSB
±0.3 ±1 LSB
±1 LSB
±0.8
ppm/°C
±0.3 ±1 LSB
Channel-to-Channel
Offset Matching
±0.1
LSB
DYNAMIC SPECIFICATIONS (10.034kHz sine-wave input, 4.096Vp-p, 50ksps, 500kHz external clock)
Signal-to-Noise
and Distortion Ratio
SINAD
49 dB
Total Harmonic Distortion
(up to the 5th harmonic)
THD
-70 dB
Spurious-Free Dynamic Range
Channel-to-Channel Crosstalk
Small-Signal Bandwidth
Full-Power Bandwidth
SFDR
VCH_ = 4.096Vp-p, 25kHz (Note 3)
-3dB rolloff
68 dB
-75 dB
1.5 MHz
800 kHz
2 _______________________________________________________________________________________


Part Number MAX1112
Description +5V / Low-Power / Multi-Channel / Serial 8-Bit ADCs
Maker Maxim
Total Page 20 Pages
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