MAX11040K/MAX11060
EVALUATION KIT AVAILABLE
24-/16-Bit, 4-Channel, Simultaneous-Sampling,
Cascadable, Sigma-Delta ADCs
General Description
The MAX11040K/MAX11060 are 24-/16-bit, 4-channel,
simultaneous-sampling, sigma-delta analog-to-digital
converters (ADCs). The devices allow simultaneous sam-
pling of as many as 32 channels using a built-in cascade
feature to synchronize as many as eight devices. The
serial interface of the devices allows reading data from
all the cascaded devices using a single command. Four
modulators simultaneously convert each fully differential
analog input with a programmable data output rate rang-
ing from 0.25ksps to 64ksps. The devices achieve 106dB
SNR at 16ksps and 117dB SNR at 1ksps (MAX11040K).
The devices operate from a single +3V supply. The differ-
ential analog input range is ±2.2V when using the internal
reference; an external reference is optional. Each input
is overvoltage protected up to ±6V without damage. The
devices use an internal crystal oscillator or an external
source for clock.
The devices are compatible with SPI, QSPI™,
MICROWIRE®, and DSP-compatible 4-wire serial inter-
faces. An on-board interface logic allows one serial
interface (with a single chip select) to control up to eight
cascaded devices or 32 simultaneous sampling analog
input channels.
The devices are ideally suited for power-management
systems. Each channel includes an adjustable sampling
phase enabling internal compensation for phase shift due
to external dividers, transformers, or filters at the inputs.
The output data rate is adjustable with a 0.065% resolu-
tion (at 16ksps or below) to track the varying frequency of
a periodic input. A SYNC input allows periodic alignment
of the conversion timing of multiple devices with a remote
timing source.
The devices are available in a 38-pin TSSOP package spec-
ified over the -40°C to +105°C industrial temperature range.
Applications
●● Power-Protection Relay Equipment
●● Multiphase Power Systems
●● Industrial Data-Acquisition Systems
●● Medical Instrumentation
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX11040K.related.
MICROWIRE is a registered trademark of National
Semiconductor Corp.
QSPI is a trademark of Motorola, Inc.
Benefits and Features
●● Feature Set Ideal for Energy Measurement Systems
• Four Fully Differential Simultaneously Sampled
Channels
• Cascadable for Up to 32 Channels of Simultaneous
Sampling
• Programmable Sampling Phase for Phase Shift
Compensation
▫▫ 0 to 333μs in 1.33μs Steps
• Programmable Output Data Rate with 0.065%
Resolution
●● Excellent Performance for High-Accuracy
Measurement Applications
• 117dB SNR at 1ksps
• 106dB SNR at 16ksps
• 0.25% Error Over a 1000:1 Dynamic Range
• ±2.2V Full-Scale Input Range
●● Single-Supply Operation and Protected Inputs for
Design Simplicity and Robustness
• 3.0V to 3.6V Analog Supply Voltage
• 2.7V to VAVDD Digital Supply Voltage
• ±6V Overvoltage Protected Inputs
• -40˚C to +105˚C Operating Temperature Range
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX11040KGUU+ -40°C to +105°C 38 TSSOP
MAX11060GUU+ -40°C to +105°C 38 TSSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Functional Diagram
OVRFLW FAULT
AIN0+
AIN0-
REF0
AIN1+
AIN1-
REF1
AIN2+
AIN2-
REF2
AIN3+
AIN3-
REF3
24-BIT
ADC
DIGITAL
FILTER
24-BIT
ADC
24-BIT
ADC
DIGITAL
FILTER
DIGITAL
FILTER
REGISTERS AND
DIGITAL
CONTROL
SERIAL
INTERFACE
24-BIT
ADC
DIGITAL
FILTER
SYNC
DRDYIN
DRDYOUT
CASCIN
CASCOUT
CS
SCLK
DIN
DOUT
MAX11040K
REFIO
2.5V
REFERENCE
CRYSTAL
OSCILLATOR
AGND
XIN XOUT CLKOUT
DGND
19-5741; Rev 4; 5/15
