Rainbow Electronics MAX1289 - Manual

General Description
The MAX1286–MAX1289 are low-cost, micropower, seri-
al output 12-bit analog-to-digital converters (ADCs)
available in a tiny 8-pin SOT23. The MAX1286/MAX1288
operate with a single +5V supply. The MAX1287/
MAX1289 operate with a single +3V supply. The
devices feature a successive-approximation ADC, auto-
matic shutdown, fast wakeup (1.4µs), and a high-speed
3-wire interface. Power consumption is only 0.5mW
(V
DD = +2.7V) at the maximum sampling rate of
150ksps. AutoShutdown™ (0.2µA) between conversions
results in reduced power consumption at slower
throughput rates. The MAX1286/MAX1287 provide
2-channel, single-ended operations and accept input
signals from 0 to V
REF . The MAX1288/MAX1289 accept
true-differential inputs ranging from 0 to V REF . Data is
accessed using an external clock through the 3-wire
SPI™/QSPI™/MICROWIRE™–compatible serial inter-
face. Excellent dynamic performance, low power, ease
of use, and small package size make these converters
ideal for portable battery-powered data-acquisition
applications, and for other applications that demand low
power consumption and minimal space.
Applications
Low-Power Data Acquisition
Portable Temperature Monitors
Flowmeters
Touch Screens
Features
♦ Single-Supply Operation
+3V (MAX1287/MAX1289)
+5V (MAX1286/MAX1288)
♦ Autoshutdown Between Conversions
♦ Low Power
245µA at 150ksps
150µA at 100ksps
15µA at 10ksps
2µA at 1ksps
0.2µA in Shutdown
♦ True-Differential Track/Hold, 150kHz Sampling Rate
♦ Software-Configurable Unipolar/Bipolar
Conversion (MAX1288/MAX1289 Only)
♦ SPI/QSPI/MICROWIRE–Compatible Interface for
DSPs and Processors
♦ Internal Conversion Clock
♦ 8-Pin SOT23 Package
MAX1286–MAX1289
150ksps, 12-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23
________________________________________________________________ Maxim Integrated Products 1
CNVST
REF GND
1
2
8
7
SCLK
DOUT AIN1 (AIN+)
AIN2 (AIN-)
V DD
SOT23
TOP VIEW
( ) ARE FOR THE MAX1288/MAX1289
3
4
6
5
MAX1286
MAX1287
MAX1288
MAX1289
Pin Configuration
19-2231; Rev 0; 10/01
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
PART
TEMP.
RANGE
PIN-
PACKAGE TOP
MARK
MAX1286 EKA-T -40°C to +85°C 8 SOT23-8 AAFA
MAX1287 EKA-T -40°C to +85°C 8 SOT23-8 AAEW
MAX1288 EKA-T -40°C to +85°C 8 SOT23-8 AAFC
MAX1289 EKA-T -40°C to +85°C 8 SOT23-8 AAEY
EVALUATION KIT
AVAILABLE