MAX110 Datasheet, PDF (1/24 Pages) Maxim Integrated Products – Low-Cost, 2-Channel, ±14-Bit Serial ADCs

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
V_DD 4
MAX110
MAX111
14 IN2-
13 V_SS (AGND)
IN2-
REF+
REF-
CS
RCSEL 5
XCLK 6
SCLK 7
12 GND
11 DIN
10 DOUT
( ) ARE FOR MAX111
SCLK
DIN
V_SS
(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.
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