MAX157 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks

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.
Battery-Powered Systems
Portable Data Logging
Isolated Data Acquisition
Process-Control Monitoring
Applications
Instrumentation
Test Equipment
Medical Instruments
System Supervision
Pin Configuration
TOP VIEW
V_DD 1
CH0 (CH+) 2
CH1 (CH-) 3
GND 4
MAX157
MAX159
8 SCLK
7 DOUT
6 CS/SHDN
5 REF
µMAX/DIP
( ) ARE FOR MAX159 ONLY.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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
Ordering Information
PART
TEMP.
RANGE
PIN-
PACKAGE
MAX157ACUA 0°C to +70°C 8 µMAX
MAX157BCUA 0°C to +70°C 8 µMAX
MAX157ACPA 0°C to +70°C 8 Plastic DIP
MAX157BCPA 0°C to +70°C 8 Plastic DIP
MAX157AEUA -40°C to +85°C 8 µMAX
MAX157BEUA -40°C to +85°C 8 µMAX
MAX157AEPA -40°C to +85°C 8 Plastic DIP
MAX157BEPA -40°C to +85°C 8 Plastic DIP
MAX157AMJA -55°C to +125°C 8 CERDIP*
MAX157BMJA -55°C to +125°C 8 CERDIP*
MAX159ACUA 0°C to +70°C 8 µMAX
MAX159BCUA 0°C to +70°C 8 µMAX
MAX159ACPA 0°C to +70°C 8 Plastic DIP
MAX159BCPA 0°C to +70°C 8 Plastic DIP
MAX159AEUA -40°C to +85°C 8 µMAX
MAX159BEUA -40°C to +85°C 8 µMAX
MAX159AEPA -40°C to +85°C 8 Plastic DIP
MAX159BEPA -40°C to +85°C 8 Plastic DIP
MAX159AMJA -55°C to +125°C 8 CERDIP*
MAX159BMJA -55°C to +125°C 8 CERDIP*
*Contact factory for availability.
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
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