19-1194; Rev 2; 10/98
+2 .7 V, Lo w -P o w e r, Mu lt ic h a n n e l,
S e ria l 8 -Bit ADCs
0/MAX1
Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
The MAX1110/MAX1111 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 +2.7V to +5.5V
supply and consume only 85µA while sampling at rates
up to 50ksps. The MAX1110’s 8 analog inputs and the
MAX1111’s 4 analog inputs are software-configurable,
allowing unipolar/bipolar and single-ended/differential
operation.
♦ +2.7V to +5.5V Single Supply
♦ Low Power: 85µA at 50ksps
6µA at 1ksps
♦ 8-Channel Single-Ended or 4-Channel Differential
Inputs (MAX1110)
♦ 4-Channel Single-Ended or 2-Channel Differential
Inputs (MAX1111)
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-
mine d b y the 2.048V inte rna l re fe re nc e , or b y a n
♦ Internal Track/Hold; 50kHz Sampling Rate
♦ Internal 2.048V Reference
♦ SPI/QSPI/MICROWIRE-Compatible Serial Interface
♦ Software-Configurable Unipolar or Bipolar Inputs
externally applied reference ranging from 1V to V
.
DD
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.
♦ Total Unadjusted Error: ±1LSB max
±0.3LSB typ
The MAX1110/MAX1111 ha ve a s oftwa re -p rog ra m-
mable, 2µA automatic power-down mode to minimize
power consumption. Using power-down, the supply
current is reduced to 6µA at 1ksps, and only 52µA at
10ksps. Power-down can also be controlled using the
SHDN input pin. Accessing the serial interface automat-
ically powers up the device.
Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
20 Plastic DIP
20 SSOP
MAX1110CPP
MAX1110CAP
MAX1110C/D
Dice*
The MAX1110 is available in 20-pin SSOP and DIP
packages. The MAX1111 is available in small 16-pin
QSOP and DIP packages.
*Dice are specified at T = +25°C, DC parameters only.
A
Ordering Information continued at end of data sheet.
________________Fu n c t io n a l Dia g ra m
________________________Ap p lic a t io n s
Portable Data Logging
CS
SCLK
INPUT
SHIFT
REGISTER
INT
CLOCK
Hand-Held Measurement Devices
Medical Instruments
DIN
CONTROL
LOGIC
SHDN
System Diagnostics
CH0
CH1
CH2
OUTPUT
SHIFT
REGISTER
DOUT
Solar-Powered Remote Systems
SSTRB
ANALOG
INPUT
MUX
CH3
T/H
4–20mA-Powered Remote
Data-Acquisition Systems
CH4*
CH5*
CH6*
CH7*
CLOCK
IN
8-BIT
SAR ADC
OUT
REF
V
DD
COM
Pin Configurations appear at end of data sheet.
DGND
AGND
+2.048V
REFERENCE
REFOUT
MAX1110
MAX1111
REFIN
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
*MAX1110 ONLY
________________________________________________________________ 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.