Rainbow Electronics MAX159 - Manual

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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.
Applications
Battery-Powered Systems Instrumentation
Portable Data Logging Test Equipment
Isolated Data Acquisition Medical Instruments
Process-Control Monitoring System Supervision
Features
♦ Single-Supply Operation (+2.7V to +5.25V)
♦ Two Single-Ended Channels (MAX157)
Single Pseudo-Differential Channel (MAX159)
♦ Low Power
0.9mA (at 108ksps, +3V)
100µA (at 10ksps, +3V)
10µA (at 1ksps, +3V)
<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 12-Bit Upgrades Available
MAX157/MAX159
+2.7V, Low-Power, 2-Channel,
108ksps, Serial 10-Bit ADCs in 8-Pin µMAX
________________________________________________________________ Maxim Integrated Products 1
CS/SHDN
REF GND
1
2
8
7
SCLK
DOUT
( ) ARE FOR MAX159 ONLY.
CH0 (CH+)
CH1 (CH-)
V DD
µ MAX/DIP
TOP VIEW
3
4
6
5
MAX157
MAX159
19-1388; Rev 0; 11/98
Pin Configuration
Ordering Information
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
* Contact factory for availability.
±1 8 CERDIP* -55°C to +125°C MAX159BMJA
±0.5 8 CERDIP* -55°C to +125°C MAX159AMJA
±1 8 Plastic DIP -40°C to +85°C MAX159BEPA
±0.5 8 Plastic DIP -40°C to +85°C MAX159AEPA
±1 8 µMAX -40°C to +85°C MAX159BEUA
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±0.5
±1
±0.5
±1
±0.5
INL
(LSB)
8 CERDIP*
8 CERDIP*
8 Plastic DIP -40°C to +85°C
-55°C to +125°C
-55°C to +125°C MAX157BMJA
MAX157AMJA
MAX157BEPA
8 Plastic DIP
8 µMAX -40°C to +85°C
-40°C to +85°C MAX157AEPA
MAX157BEUA
8 µMAX
8 Plastic DIP 0°C to +70°C
-40°C to +85°C MAX159AEUA
MAX159BCPA
8 Plastic DIP
8 µMAX
8 µMAX 0°C to +70°C
0°C to +70°C
0°C to +70°C MAX159ACPA
MAX159BCUA
MAX159 ACUA
8 µMAX
8 Plastic DIP 0°C to +70°C
-40°C to +85°C MAX157AEUA
MAX157BCPA
8 Plastic DIP
8 µMAX
8 µMAX
PIN-
PACKAGE TEMP.
RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C MAX157ACPA
MAX157BCUA
MAX157 ACUA
PART