Specifications

Motor Control
Monitoring and controlling multichannel currents and voltages
www.digikey.com/maxim-industrial 105
Benefits
• Preserve phase integrity, save space
– Simultaneous sampling on multiple
channels
– Two differential or four single-ended
input channels
• Simplify data transmission, save cost
and space on isolators
– 4-wire SPI interface reduces number of
isolation components needed compared
to ADCs with parallel data interfaces
• Monitor constantly with a fast sampling
speed
– Dual integrated ADCs sample at up to
1.25Msps
MAX1377/MAX1379/MAX1383
The MAX1377/MAX1379/MAX1383 integrate a pair of successive
approximation register (SAR) ADCs that simultaneously sample a pair
of differential inputs. This design allows a voltage and current pair
to be sampled with the phase integrity between the two channels
preserved. The MAX1377 (0 to 5V), MAX1379 (0 to 10V), and
MAX1383 (±10V) sample up to 1.25Msps, allowing constant monitoring
of the motor’s health at various analog-input ranges. These ADCs
communicate over a 4-wire SPI™ serial interface that saves cost and
space on the external isolation components compared to similar
high-speed ADCs with parallel interfaces.
Detect errant motor shifts quickly by sampling at 1.25Msps
The MAX1377/MAX1379/MAX1383 integrate two ADCs for true simultaneous sampling.
MUX
MUX
12-BIT
SAR
ADC2
REF
REFSEL
RGND
SEL
AGND
DGND
DOUT2
SCLK
CNVST
DOUT1
OUTPUT
BUFFER
INTERNAL
REFERENCE
CONTROL
LOGIC
SERIAL
INTERFACE
AND TIMING
V
L
T/H
T/H
AIN1A
AIN1B
AIN2A
AIN2B
U/B
S/D
V
L
AVDD
A = 1
12-BIT
SAR
ADC1
CS
OUTPUT
BUFFER
MAX1377
MAX1379
MAX1383