19-5159; Rev 0; 8/10
16-Bit, Data-Acquisition System with ADC, DACs,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
MAX1358B
General Description
Features
o +1.8V to +3.6V Single-Supply Operation
The MAX1358B smart data-acquisition system (DAS) is
based on a 16-bit, sigma-delta analog-to-digital converter
(ADC) and system-support functionality for a micro-
processor (µP)-based system. This device integrates
an ADC, DACs, operational amplifiers, internal selec-
table-voltage reference, temperature sensors, analog
switches, a 32kHz oscillator, a real-time clock (RTC)
with alarm, a high-frequency-locked loop (FLL) clock,
four user-programmable I/Os, an interrupt generator,
and 1.8V and 2.7V voltage monitors in a single chip.
o Multichannel, 16-Bit, Sigma-Delta ADC
10sps to 477sps Programmable Conversion Rate
Self- and System Offset and Gain Calibration
PGA with Gains of 1, 2, 4, or 8
Unipolar and Bipolar Modes
10-Input Differential Multiplexer
o 10-Bit Force-Sense DACs
o Uncommitted Op Amps
o Dual SPDT and SPST Analog Switches
The MAX1358B has dual 10:1 differential input multiplex-
ers (muxes) that accept signal levels from 0 to AV . An
DD
on-chip 1x to 8x programmable-gain amplifier (PGA)
allows measuring low-level signals and reduces external
circuitry required.
o Selectable References
1.25V, 2.048V, and 2.5V
o Internal Charge Pump
o System Support
RTC and Alarm Register
Internal/External Temperature Sensor
Internal Oscillator with Clock Output
User-Programmable I/O and Interrupt Generator
The MAX1358B operates from a single +1.8V to +3.6V
supply and consumes only 1.15mA in normal mode and
only 3µA in sleep mode. The MAX1358B has two DACs
with one uncommitted op amp.
V
DD
Monitors
o SPI/QSPI/MICROWIRE, 4-Wire Serial Interface
The serial interface is compatible with either SPI™/QSPI™
or MICROWIRE™, and is used to power up, configure,
and check the status of all functional blocks.
o Space-Saving (6mm x 6mm x 0.8mm), 40-Pin
TQFN Package
Ordering Information
The MAX1358B is available in a space-saving, 40-pin
TQFN package and is specified over the commercial
(0°C to +70°C) and the extended (-40°C to +85°C) tem-
perature ranges.
PART
TEMP RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
40 TQFN-EP*
40 TQFN-EP*
MAX1358BCTL+
MAX1358BETL+
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Applications
Battery-Powered and Portable Devices
Electrochemical and Optical Sensors
Medical Instruments
Pin Configuration
TOP VIEW
Industrial Control
30 29 28 27 26 25 24 23 22 21
Data-Acquisition Systems
31
20 OUT1
19 SNC2
18 SCM2
17 SNO2
16 SNC1
15 SCM1
14 SNO1
13 32KIN
12 32KOUT
11 RESET
AIN2
AIN1
REF
32
33
34
35
36
37
38
REG
CF-
MAX1358B
CF+
CPOUT
DV
DD
DGND 39
UPIO1 40
*EP
+
1
2
3
4
5
6
7
8
9
10
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
TQFN
*EXPOSED PAD.
________________________________________________________________ Maxim Integrated Products
1
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.