19-1388; Rev 0; 11/98
+2.7V, Low-Power, 2-Channel,
108ksps, Serial 10-Bit ADCs in 8-Pin µMAX
General Description
The MAX157/MAX159 low-power, 10-bit analog-to-digi-
tal 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 0.2µA automatic shutdown further
reduces power consumption.
The MAX157 provides 2-channel, single-ended opera-
tion and accepts input signals from 0 to V
REF
. The
MAX159 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 a 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 12-bit upgrades, see the
MAX144/MAX145 data sheet.
Features
o
Single-Supply Operation (+2.7V to +5.25V)
o
Two Single-Ended Channels (MAX157)
Single Pseudo-Differential Channel (MAX159)
o
Low Power
0.9mA (at 108ksps, +3V)
100µA (at 10ksps, +3V)
10µA (at 1ksps, +3V)
<0.2µA (power-down mode)
o
Internal Track/Hold
o
108ksps Sampling Rate
o
SPI/QSPI/MICROWIRE-Compatible 3-Wire
Serial Interface
o
Space-Saving 8-Pin µMAX Package
o
Pin-Compatible 12-Bit Upgrades Available
MAX157/MAX159
Ordering Information
PART
TEMP.
RANGE
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
PIN-
PACKAGE
8 µMAX
8 µMAX
8 Plastic DIP
8 Plastic DIP
8 µMAX
8 µMAX
8 Plastic DIP
8 Plastic DIP
8 CERDIP*
8 CERDIP*
8 µMAX
8 µMAX
8 Plastic DIP
8 Plastic DIP
8 µMAX
8 µMAX
8 Plastic DIP
8 Plastic DIP
8 CERDIP*
8 CERDIP*
INL
(LSB)
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
Applications
Battery-Powered Systems
Portable Data Logging
Isolated Data Acquisition
Process-Control Monitoring
Instrumentation
Test Equipment
Medical Instruments
System Supervision
MAX157ACUA
MAX157BCUA
MAX157ACPA
MAX157BCPA
MAX157AEUA
MAX157BEUA
MAX157AEPA
MAX157BEPA
Pin Configuration
TOP VIEW
V
DD
1
CH0 (CH+)
2
CH1 (CH-)
3
8
7
SCLK
DOUT
CS/SHDN
REF
MAX157AMJA -55°C to +125°C
MAX157BMJA -55°C to +125°C
MAX159ACUA
0°C to +70°C
MAX159BCUA
0°C to +70°C
MAX159ACPA
0°C to +70°C
MAX159BCPA
0°C to +70°C
MAX159AEUA -40°C to +85°C
MAX159BEUA -40°C to +85°C
MAX159AEPA
MAX159BEPA
MAX159AMJA
MAX159BMJA
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-55°C to +125°C
MAX157
MAX159
6
5
GND
4
µMAX/DIP
( ) ARE FOR MAX159 ONLY.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
*Contact
factory for availability.
1
________________________________________________________________
Maxim Integrated Products
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 [ MAXIM INTEGRATED PRODUCTS ]
