Specifications

Motor Control
Monitoring and controlling multichannel currents and voltages
104 Maxim Industrial Solutions
Benefits
• Industry-leading dynamic range allows
early detection of error signals
– 93dB SNR and -105dB THD
• Simultaneous sampling eliminates
phase-adjust firmware requirements
– 8, 6, or 4-channel ADC options
• Lower system cost by as much as 15%
over competing simultaneous-sampling
ADCs
– High-impedance input saves costly
precision op amp
– Bipolar input eliminates level shifter
– Single 5V voltage supply
– 20mA surge protection
• Eliminate external protection
components, saving space and cost
– Integrated analog-input clamps and
small 8mm x 8mm TQFN package
provide the highest density per channel
MAX11044/MAX11045/MAX11046
MAX11047/MAX11048/MAX11049
The MAX11044–MAX11049 ADCs are an ideal fit for motor-control
applications that require a wide dynamic range. With a 93dB signal-
to-noise ratio (SNR), these ADCs detect very fine changes to motor
currents and voltages, which enables a more precise reading of
motor performance over time. The MAX11046/MAX11045/MAX11044
simultaneously sample eight, six, or four analog inputs, respectively.
All ADCs operate from a single 5V supply. The MAX11044–MAX11046
ADCs measure ±5V analog inputs, and the MAX11047–MAX11049
measure 0 to 5V. These ADCs also include analog input clamps
which eliminate an external buffer on each channel.
Resolve very fine motor adjustments and operate higher accuracy systems with
simultaneous-sampling ADCs
The MAX11046 ADC simultaneously samples up to 8 analog-input channels.
16-BIT
ADC
16-BIT
ADC
16-BIT
ADC
16-BIT
ADC
16-BIT
ADC
POSITION
ENCODER
DSP-BASED DIGITAL
PROCESSING ENGINE
IGBT CURRENT DRIVERS
I
PHASE1
THREE-PHASE ELECTRIC MOTOR
I
PHASE3
I
PHASE2
MAX11046