MAX144_05 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – +2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin μMAX

19-1387; Rev 2; 10/05
+2.7V, Low-Power, 2-Channel, 108ksps,
Serial 12-Bit ADCs in 8-Pin µMAX
General Description
The MAX144/MAX145 low-power, 12-bit analog-to-
digital converters (ADCs) are available in 8-pin µMAX^®
and DIP packages. Both devices operate with a single
+2.7V to +5.25V supply and feature a 7.4µs succes-
sive-approximation ADC, automatic power-down, fast
wake-up (2.5µs), an on-chip clock, and a high-speed,
3-wire serial interface.
Power consumption is only 3.2mW (V_DD = +3.6V) at the
maximum sampling rate of 108ksps. At slower through-
put rates, the automatic shutdown (0.2µA) further
reduces power consumption.
The MAX144 provides 2-channel, single-ended opera-
tion and accepts input signals from 0 to V_REF. The
MAX145 accepts pseudo-differential inputs ranging
from 0 to V_REF. An external clock accesses data-
through the 3-wire serial interface, which is SPI™,
QSPI™, and MICROWIRE™-compatible.
Excellent dynamic performance and low power, com-
bined with ease of use and small package size, make
these converters ideal for battery-powered and data-
acquisition applications, or for other circuits with
demanding power-consumption and space require-
ments. For pin-compatible 10-bit ADCs, see the
MAX157 and MAX159 data sheets.
Applications
Battery-Powered Systems Instrumentation
Portable Data Logging
Test Equipment
Isolated Data Acquisition Medical Instruments
Process-Control Monitoring System Supervision
Pin Configuration
TOP VIEW
V_DD 1
CH0 (CH+) 2
CH1 (CH-) 3
GND 4
MAX144
MAX145
8 SCLK
7 DOUT
6 CS/SHDN
5 REF
( ) ARE FOR MAX145 ONLY µMAX/DIP
µMAX is a registered trademark of Maxim Integrated Products, Inc.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Features
♦ Single-Supply Operation (+2.7V to +5.25V)
♦ Two Single-Ended Channels (MAX144) One
Pseudo-Differential Channel (MAX145)
♦ Low Power
0.9mA (108ksps, +3V Supply)
100µA (10ksps, +3V Supply)
10µA (1ksps, +3V Supply)
0.2µA (Power-Down Mode)
♦ Internal Track/Hold
♦ 108ksps Sampling Rate
♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial
Interface
♦ Space-Saving 8-Pin µMAX Package
♦ Pin-Compatible 10-Bit Versions Available
Ordering Information
PART
TEMP PIN-
RANGE PACKAGE
INL PKG
(LSB) CODE
MAX144ACUA
MAX144BCUA
MAX144ACPA
MAX144BCPA
MAX144BC/D
MAX144AEUA
MAX144BEUA
MAX144AEPA
MAX144BEPA
MAX144AMJA
MAX144BMJA
0°C to
+70°C
0°C to
+70°C
0°C to
+70°C
0°C to
+70°C
0°C to
+70°C
-40°C to
+85°C
-40°C to
+85°C
-40°C to
+85°C
-40°C to
+85°C
-55°C to
+125°C
-55°C to
+125°C
8 µMAX
8 µMAX
8 Plastic DIP
8 Plastic DIP
Dice*
8 µMAX
8 µMAX
8 Plastic DIP
8 Plastic DIP
8 CERDIP**
8 CERDIP**
±0.5
±1
±0.5
±1
±1
±0.5
±1
±0.5
±1
±0.5
±1
U8-1
U8-1
P8-1
P8-1
—
U8-1
U8-1
P8-1
P8-1
J8-2
J8-2
*Dice are specified at T_A = +25°C, DC parameters only.
**Contact factory for availability.
Ordering Information continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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