19-2229; Rev 0; 10/01
Low-Power, 16-Bit Multichannel DAS with
Internal Reference,10-Bit DACs, and RTC
General Description
Features
The MAX1407/MAX1408/MAX1409/MAX1414 are low-
power, general-purpose, multichannel data-acquisition
systems (DAS). These devices are optimized for low-
power applications. All the devices operate from a sin-
gle +2.7V to +3.6V power supply and consume a
maximum of 1.15mA in Run mode and only 2.5µA in
Sleep mode.
ꢀ +2.7V to +3.6V Supply Voltage Range in Standby,
Idle, and Run Mode (Down to 1.8V in Sleep Mode)
ꢀ 1.15mA Run Mode Supply Current
ꢀ 2.5µA Sleep Mode Supply Current (Wake-Up, RTC,
and Voltage Monitor Active)
ꢀ Multichannel 16-Bit Sigma-Delta ADC
1.5 ꢀSB (typ) Integral ꢁonlinearity
30Hz or 60Hz Continuous Conversion Rate
Buffered or Unbuffered Mode
Gain of +1/3, +1, or +2V/V
The MAX1407/MAX1408/MAX1414 feature a differential
8:1 input multiplexer to the ADC, a programmable
three-state digital output, an output to shutdown an
external power supply, and a data ready output from
the ADC. The MAX1408 has eight auxiliary analog
inputs, while the MAX1407/MAX1414 include four auxil-
iary analog inputs and two 10-bit force/sense DACs.
The MAX1414 features a 50mV trip threshold for the
signal-detect comparator while the others have a 0mV
trip threshold. The MAX1409 is a 20-pin version of the
DAS family with a differential 4:1 input multiplexer to the
ADC, one auxiliary analog input, and one 10-bit
force/sense DAC.
Unipolar or Bipolar Mode
On-Chip Offset Calibration
ꢀ 10-Bit Force/Sense DACs
ꢀ Buffered 1.25V, 18ppm/°C (typ) Bandgap
Reference Output
ꢀ SPI™/QSPI™ or MICROWIRE™-Compatible Serial
Interface
The MAX1407/MAX1408/MAX1414 are available in
space-saving 28-pin SSOP packages, while the
MAX1409 is available in a 20-pin SSOP package.
ꢀ System Support Functions
RTC (Valid til 9999) and Alarm
High-Frequency Pꢀꢀ Clock Output (2.4576MHz)
+1.8V and +2.7V RESET and Power-Supply
Voltage Monitors
Applications
Medical Instruments
Industrial Control Systems
Portable Equipment
Data-Acquisition System
Automatic Testing
Signal Detect Comparator
Interrupt Generator (INT and DRDY)
Three-State Digital Output
Wake-Up Circuitry
ꢀ 28-Pin SSOP (MAX1407/MAX1408/MAX1414),
20-Pin SSOP (MAX1409)
Robotics
Pin Configurations
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
PIN-PACKAGE
28 SSOP
TOP VIEW
FB2
DO
1
2
28 OUT2
27 IN3
MAX1407CAI
MAX1408CAI
MAX1409CAP
MAX1414CAI
28 SSOP
FB1
3
26 DV
DD
20 SSOP
OUT1
IN0
4
25 DGND
24
5
CS
28 SSOP
REF
6
23 SCLK
22 DIN
AGND
7
MAX1407
MAX1414
Pin Configurations continued at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
AV
8
21 DOUT
20 INT
DD
CPLL
WU1
9
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
10
19 CLKIN
18 CLKOUT
17 FOUT
16 DRDY
15 SHDN
WU2 11
RESET 12
IN1 13
IN2 14
________________________________________________________________ Maxim Integrated Products
1
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.