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Maxim Integrated Semiconductor Electronic Components Datasheet


MAX110

Low-Cost / 2-Channel / 14-Bit Serial ADCs



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MAX110 pdf
19-0283; Rev 5; 11/98
EVAALVUAAILTAIOBNLEKIT
Low-Cost, 2-Channel, ±14-Bit Serial ADCs
General Description
The MAX110/MAX111 analog-to-digital converters
(ADCs) use an internal auto-calibration technique to
achieve 14-bit resolution plus overrange, with no exter-
nal components. Operating supply current is only
550µA (MAX110) and reduces to 4µA in power-down
mode, making these ADCs ideal for high-resolution bat-
tery-powered or remote-sensing applications. A fast
serial interface simplifies signal routing and opto-isola-
tion, saves microcontroller pins, and offers compatibility
with SPI™, QSPI™, and MICROWIRE™. The MAX110
operates with ±5V supplies, and converts differential
analog signals in the -3V to +3V range. The MAX111
operates with a single +5V supply and converts differ-
ential analog signals in the ±1.5V range, or single-
ended signals in the 0V to +1.5V range.
Internal calibration allows for both offset and gain-error
correction under microprocessor (µP) control. Both
devices are available in space-saving 16-pin DIP and
SO packages, as well as an even smaller 20-pin SSOP
package.
________________________Applications
Process Control
Weigh Scales
Panel Meters
Data-Acquisition Systems
Temperature Measurement
Typical Operating Circuit
____________________________Features
o Single +5V Supply (MAX111)
o Two Differential Input Channels
o 14-Bit Resolution Plus Sign and Overrange
o 0.03% Linearity (MAX110)
0.05% Linearity (MAX111)
o Low Power Consumption:
550µA (MAX110)
640µA (MAX111)
4µA Shutdown Current
o Up to 50 Conversions/sec
o 50Hz/60Hz Rejection
o Auto-Calibration Mode
o No External Components Required
o 16-Pin DIP/SO, 20-Pin SSOP
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE INL(%)
MAX110ACPE 0°C to +70°C 16 Plastic DIP ±0.03
MAX110BCPE 0°C to +70°C 16 Plastic DIP ±0.05
MAX110ACWE 0°C to +70°C 16 Wide SO
±0.03
MAX110BCWE 0°C to +70°C 16 Wide SO
±0.05
MAX110ACAP 0°C to +70°C 20 SSOP
±0.03
MAX110BCAP 0°C to +70°C 20 SSOP
±0.05
MAX110BC/D 0°C to +70°C Dice*
±0.05
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
Pin Configurations
+5V TOP VIEW
VDD
IN1+ RCSEL
IN1+ 1
REF- 2
16 IN1-
15 IN2+
IN1- MAX110
IN2+ MAX111
REF+ 3
VDD 4
MAX110
MAX111
14 IN2-
13 VSS (AGND)
IN2-
REF+
REF-
CS
RCSEL 5
XCLK 6
SCLK 7
12 GND
11 DIN
10 DOUT
( ) ARE FOR MAX111
SCLK
DIN
VSS
(AGND) DOUT
-5V (0V)
FROM µC
BUSY 8
9 CS
DIP/SO
( ) ARE FOR MAX111
Pin Configurations continued at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ 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.



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MAX110 pdf
Low-Cost, 2-Channel, ±14-Bit Serial ADCs
ABSOLUTE MAXIMUM RATINGS
VDD to GND ...........................................................................+6V
VSS to GND (MAX110)..............................................+0.3V to -6V
AGND to DGND.....................................................-0.3V to +0.3V
VIN1+, VIN1- ......................................(VDD + 0.3V) to (VSS - 0.3V)
VIN2+, VIN2- ......................................(VDD + 0.3V) to (VSS - 0.3V)
VREF+, VREF- ....................................(VDD + 0.3V) to (VSS - 0.3V)
Digital Inputs and Outputs .........................(VDD + 0.3V) to -0.3V
Continuous Power Dissipation
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C).....842mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C) ......762mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) ...........640mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C)......800mW
Operating Temperature Ranges
MAX11_ _C_ _......................................................0°C to +70°C
MAX11_ _E_ _ ...................................................-40°C to +85°C
MAX11_BMJE .................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°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—MAX110
(VDD = 5V ±5%, VSS = -5V ±5%, fXCLK = 1MHz, ÷ 2 mode (DV2 = 1), 81,920 CLK cycles/conv, VREF+ = 1.5V, VREF- = -1.5V,
TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
ACCURACY (Note 1)
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Resolution
RES (Note 2)
14 + POL
+ OFL
Bits
Differential Nonlinearity
No-Missing-Codes
Resolution
Relative Accuracy
(Notes 3, 5–7)
Offset Error
Offset Error
Temperature Drift
Common-Mode Rejection
Ratio
Full-Scale Error
Full-Scale Error
Temperature Drift
Power-Supply Rejection
ANALOG INPUTS
Differential Input Voltage
Range
Absolute Input Voltage
Range
Input Bias Current
Input Capacitance
DNL (Notes 3, 4)
(Note 3)
MAX110AC/E
-VREF VIN VREF
-0.83 x VREF VIN 0.83 x VREF
INL MAX110BC/E
-VREF VIN VREF
-0.83 x VREF VIN 0.83 x VREF
MAX110BM
-VREF VIN VREF
-0.83 x VREF VIN 0.83 x VREF
VIN+ = VIN- = 0V
After offset null
Uncalibrated
CMRR -2.5V (VIN+ = VIN-) 2.5V
After gain calibration (Note 5)
Uncalibrated
VSS = -5V, VDD = 4.75V to 5.25V
VDD = 5V, VSS = -4.75V to -5.25V
VIN (Note 6)
VIN+,
VIN-
IIN+, IIN-
(Note 3)
±2
13 + POL
+ OFL
±0.03 ±0.06
±0.015 ±0.03
±0.04
±0.018
±0.1
±0.05
±4
0.003
0.02
LSB
Bits
%FSR
mV
µV/°C
6 ppm/V
±0.1
%
-8 0
8 ppm/°C
15
ppm
30
-VREF
VSS +
2.25
+VREF
VDD -
2.25
500
10
V
V
nA
pF
2 _______________________________________________________________________________________



Part Number MAX110
Description Low-Cost / 2-Channel / 14-Bit Serial ADCs
Maker Maxim - Maxim
Total Page 24 Pages
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