MAX11338 4-/8-/16-Channel ADC Datasheet

MAX11338 Datasheet, PDF, Equivalent


Part Number

MAX11338

Description

4-/8-/16-Channel ADC

Manufacture

Maxim Integrated

Total Page 30 Pages
Datasheet
Download MAX11338 Datasheet


MAX11338
EVALUATION KIT AVAILABLE
MAX11335–MAX11340
500ksps, 12-/10-Bit, 4-/8-/16-Channel ADCs with
Post-Mux External Signal Conditioning Access
General Description
Benefits and Features
The MAX11335–MAX11340 are 12-/10-bit with external
reference and 500kHz, full-linear-bandwidth, high-speed,
low-power, serial-output successive approximation reg-
ister (SAR) analog-to-digital converters (ADCs). The
MAX11335–MAX11340 provide external access to the
output of the integrated mux and ADC input, to simplify
conditioning. The MAX11335–MAX11340 include both
internal and external clock modes. These devices feature
scan mode in both internal and external clock modes. The
internal clock mode features internal averaging to increase
SNR. The external clock mode features the SampleSetK
technology, a user-programmable analog input channel
sequencer. The SampleSet approach provides greater
sequencing flexibility for multichannel applications while
alleviating significant microcontroller or DSP (controlling
unit) communication overhead.
External pins provide access to the output of the
multiplexer and ADC inputs to simplify multichannel sig-
nal conditioning. The internal clock mode features an inte-
grated FIFO allowing data to be sampled at high speeds
and then held for readout at any time or at a lower clock
rate. Internal averaging is also supported in internal clock
mode improving SNR for noisy input signals. The devices
feature analog input channels that can be configured to
be single-ended inputs, fully differential pairs, or pseudo-
differential inputs with respect to one common input. The
MAX11335–MAX11340 operate from a 2.35V to 3.6V sup-
ply and consume only 4.2mW at 500ksps.
The MAX11335–MAX11340 include AutoShutdownK,
fast wake-up, and a high-speed 3-wire serial interface.
The devices feature full power-down mode for optimal
power management. The 8MHz, 3-wire serial interface
directly connects to SPI, QSPIK, and MICROWIREM
devices without external logic.
Excellent dynamic performance, low voltage, low power,
ease of use, and small package size make these convert-
ers ideal for portable battery-powered data-acquisition
applications, and for other applications that demand low
power consumption and small space.
The MAX11335–MAX11340 are available in 32-pin, 5mm
x 5mm, TQFN packages and operate over the -40NC to
+125NC temperature range.
SampleSet and AutoShutdown are trademarks of Maxim
Integrated Products, Inc.
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National Semiconductor
Corp.
Ordering Information appears at end of data sheet.
S Highly Integrated Precision ADC Saves Space
while Retaining Flexibility
±1 LSB INL, ±1 LSB DNL, No Missing Codes
70dB SINAD at 100kHz
500ksps Conversion Rate with No Pipeline
Delay
S Analog Multiplexer with True Differential Track/Hold:
Any Combination of Single-Ended, Differential and
Pseudo-Differential Input Pin Pairs Allowed
16-/8-/4-Channel Single-Ended
12-/8-/4-Channel Fully-Differential Pairs
15-/8-/4-Channel Pseudo-Differential Relative to
a Common Input
S Two Software-Selectable Bipolar Input Ranges
(±VREF+/2, ±VREF+)
S External Differential Reference (1V to VDD)
S 32-Pin, 5mm x 5mm TQFN Package
S SampleSet™ Technology Brings Extreme
Flexibility to Program Input Configurations Per
Channel and Sampling Sequence, Optimizes
Interface to the Microcontroller
User-Defined Channel Sequence with Maximum
Length of 256
Scan Modes, Internal Averaging, and Internal Clock
16-Entry First-In/First-Out (FIFO)
S Post-Mux Signal Access Allows for External
Signal Conditioning Between the Mux and ADC
For Differential Signals
Externally Accessible Multiplex Output and ADC Input
S Low Power Consumption Extends Battery Life for
Portable Applications
1.5V to 3.6V Digital I/O Supply Voltage
2.35V to 3.6V Supply Voltage
4.2mW at 500ksps with 3V Supplies
2μA Full-Shutdown Current
S Easy to Interface with Most Microcontrollers
16MHz, 3-Wire SPI-/QSPI-/MICROWIRE-/DSP-
Compatible Serial Interface
Applications
High-Speed Data
Acquisition Systems
High-Speed Closed-Loop
Systems
Industrial Control Systems
Medical Instrumentation
Battery-Powered
Instruments
Portable Systems
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6468; Rev 1; 12/14

MAX11338
MAX11335–MAX11340
500ksps, 12-/10-Bit, 4-/8-/16-Channel ADCs with
Post-Mux External Signal Conditioning Access
ABSOLUTE MAXIMUM RATINGS
VDD to GND..............................................................-0.3V to +4V
AOP, AON, AIP, AIN, OVDD, AIN0–AIN13, CNVST/AIN14, REF+,
REF-/AIN15 to GND........................................ -0.3V to the lower of
(VDD + 0.3V) and +4V
CS, SCLK, DIN, DOUT, EOC TO GND........-0.3V to the lower of
(VOVDD + 0.3V) and +4V
DGND to GND.......................................................-0.3V to +0.3V
Input/Output Current (all pins)............................................50mA
Continuous Power Dissipation (TA = +70NC)
TQFN (derate 34.4mW/NC above +70NC)..................2758mW
Operating Temperature Range......................... -40NC to +125NC
Junction Temperature......................................................+150NC
Storage Temperature Range............................. -65NC to +150NC
Lead Temperature (soldering, 10s).................................+300NC
Soldering Temperature (reflow).......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (BJA)............29NC/W
Junction-to-Case Thermal Resistance (BJC)................1.7NC/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS (MAX11335/MAX11336/MAX11337)
(VDD = 2.35V to 3.6V, VOVDD = 1.5V to 3.6V, fSAMPLE = 500ksps, fSCLK = 8MHz, 50% duty cycle, VREF+ = VDD, TA = -40NC to +125NC,
unless otherwise noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
DC ACCURACY (Notes 3 and 4)
Resolution
RES 12 bit
Integral Nonlinearity
INL
Differential Nonlinearity
DNL No missing codes
Offset Error
Gain Error
(Note 5)
Offset Error Temperature Coefficient
OETC
Gain Temperature Coefficient
Channel-to-Channel Offset Matching
GETC
Line Rejection
PSR (Note 6)
DYNAMIC PERFORMANCE (100kHz, Input Sine Wave) (Notes 3 and 7)
Signal-to-Noise Plus Distortion
SINAD
Signal-to-Noise Ratio
SNR
Total Harmonic Distortion
(Up to the 5th Harmonic)
THD
Spurious-Free Dynamic Range
SFDR
Intermodulation Distortion
Full-Power Bandwidth
IMD f1 = 99.2432kHz, f2 = 69.2139kHz
-3dB
-0.1dB
Full-Linear Bandwidth
SINAD ≥ 70dB
MIN TYP MAX UNITS
12 Bits
1.2
-0.02
Q1.0
Q1.0
Q3.0
Q5.5
LSB
LSB
LSB
LSB
Q2 ppm/NC
Q0.8
ppm/NC
Q0.5
LSB
Q0.3 Q2 LSB/V
70 71.9
70 72.3
dB
dB
-83 -76
dB
77 84
-85
30
5
0.5
dB
dB
MHz
MHz
Maxim Integrated
  2


Features EVALUATION KIT AVAILABLE MAX11335–MAX 11340 500ksps, 12-/10-Bit, 4-/8-/16-Cha nnel ADCs with Post-Mux External Signal Conditioning Access General Descripti on Benefits and Features The MAX11335 –MAX11340 are 12-/10-bit with externa l reference and 500kHz, full-linear-ban dwidth, high-speed, low-power, serial-o utput successive approximation register (SAR) analog-to-digital converters (AD Cs). The MAX11335–MAX11340 provide ex ternal access to the output of the inte grated mux and ADC input, to simplify c onditioning. The MAX11335–MAX11340 in clude both internal and external clock modes. These devices feature scan mode in both internal and external clock mod es. The internal clock mode features in ternal averaging to increase SNR. The e xternal clock mode features the SampleS etK technology, a user-programmable ana log input channel sequencer. The Sample Set approach provides greater sequencin g flexibility for multichannel applicat ions while alleviating significant microcontroller or DSP (controlling .
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