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PDF MAX11138 Data sheet ( Hoja de datos )

Número de pieza MAX11138
Descripción (MAX11135 - MAX11143) 4-/8-/16-Channel ADCs
Fabricantes Maxim Integrated 
Logotipo Maxim Integrated Logotipo



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19-6215; Rev 1; 7/12
EVALUATION KIT AVAILABLE
MAX11135–MAX11143
500ksps, Low-Power, Serial 12-/10-/8-Bit,
4-/8-/16-Channel ADCs
General Description
Benefits and Features
The MAX11135–MAX11143 are 12-/10-/8-bit with exter-
nal reference and industry-leading 1.5MHz, full linear
bandwidth, high speed, low-power, serial output suc-
cessive-approximation register (SAR) analog-to-digital
converters (ADCs). The MAX11135–MAX11143 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 averag-
ing to increase SNR. The external clock mode features
the SampleSetK technology, a user-programmable ana-
log input channel sequencer. The SampleSet approach
provides greater sequencing flexibility for multichannel
applications while alleviating significant microcontroller
or DSP (controlling unit) communication overhead.
The internal clock mode features an integrated 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 this 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 MAX11135–
MAX11143 operate from a 2.35V to 3.6V supply and
consume only 4.2mW at 500ksps.
The MAX11135–MAX11143 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 MAX11135–MAX11143 are available in 28-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 registered a trademark of National
Semiconductor Corporation.
Ordering Information appears at end of data sheet.
S Scan Modes, Internal Averaging, and Internal
Clock
S 16-Entry First-In/First-Out (FIFO)
S SampleSet: User-Defined Channel Sequence with
Maximum Length of 256
S Analog Multiplexer with True Differential
Track/Hold
16-/8-/4-Channel Single-Ended
8-/4-/2-Channel Fully-Differential Pairs
15-/8-/4-Channel Pseudo-Differential Relative to
a Common Input
S Two Software-Selectable Bipolar Input Ranges
QVREF+/2, QVREF+
S Flexible Input Configuration Across All Channels
S High Accuracy
Q1 LSB INL, Q1 LSB DNL, No Missing Codes
Over Temperature Range
S 70dB SINAD Guaranteed at 250kHz Input
Frequency
S 1.5V to 3.6V Wide Range I/O Supply
Allows the Serial Interface to Connect Directly
to 1.8V, 2.5V, or 3.3V Digital Systems
S 2.35V to 3.6V Supply Voltage
S Longer Battery Life for Portable Applications
Low Power
4.2mW at 500ksps with 3V Supplies
2µA Full-Shutdown Current
S External Differential Reference (1V to VDD)
S 8MHz, 3-Wire SPI-/QSPI-/MICROWIRE-/DSP-
Compatible Serial Interface
S Wide -40NC to +125NC Operation
S Space-Saving, 28-Pin, 5mm x 5mm TQFN
Packages
S 500ksps Conversion Rate, No Pipeline Delay
S 12-/10-/8-Bit Resolution
Applications
High-Speed Data Acquisition Systems
High-Speed Closed-Loop Systems
Industrial Control Systems
Medical Instrumentation
Battery-Powered Instruments
Portable Systems
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX11135.related.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
  1
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MAX11138 pdf
MAX11135–MAX11143
500ksps, Low-Power, Serial 12-/10-/8-Bit,
4-/8-/16-Channel ADCs
ELECTRICAL CHARACTERISTICS (MAX11135/MAX11136/MAX11137) (continued)
(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
TIMING CHARACTERISTICS (Figure 1) (Note 11)
SCLK Clock Period
SCLK Duty Cycle
SCLK Fall to DOUT Transition
16th SCLK Fall to DOUT Disable
14th SCLK Fall to DOUT Disable
SCLK Fall to DOUT Enable
DIN to SCLK Rise Setup
SCLK Rise to DIN Hold
CS Fall to SCLK Fall Setup
SCLK Fall to CS Fall Hold
CNVST Pulse Width
tCP
tCH
tDOT
tDOD
tDOE
tDS
tDH
tCSS
tCSH
tCSW
Externally clocked conversion
CLOAD =
10pF
VOVDD = 1.5V to 2.35V
VOVDD = 2.35V to 3.6V
CLOAD = 10pF, channel ID on
CLOAD = 10pF, channel ID off
CLOAD = 10pF
See Figure 6
CS or CNVST Rise to EOC Low
(Note 7)
tCNV_INT See Figure 7, fSAMPLE = 500ksps
CS Pulse Width
tCSBW
MIN
125
40
4
4
4
1
4
1
5
5
TYP
5.3
MAX
UNITS
60
16.5
15
15
16
14
6.2
ns
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
Fs
ns
ELECTRICAL CHARACTERISTICS (MAX11138/MAX11139/MAX11140)
(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
DC ACCURACY (Notes 3 and 4)
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error 
Gain Error 
Offset Error Temperature
Coefficient
Gain Temperature Coefficient
Channel-to-Channel Offset
Matching
Line Rejection
SYMBOL
CONDITIONS
RES
INL
DNL
10 bit
No missing codes
OETC
GETC
(Note 5)
PSR (Note 6)
MIN
TYP
MAX
UNITS
10 Bits
±0.4
LSB
±0.4
LSB
0.5
±1.0
LSB
-0.2
±1.1
LSB
±2 ppm/NC
±0.8
ppm/NC
±0.5
LSB
±0.1
±0.3
LSB/V
  5
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MAX11138 arduino
MAX11135–MAX11143
500ksps, Low-Power, Serial 12-/10-/8-Bit,
4-/8-/16-Channel ADCs
ELECTRICAL CHARACTERISTICS (MAX11141/MAX11142/MAX11143) (continued)
(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
TIMING CHARACTERISTICS (Figure 1) (Note 11)
CONDITIONS
MIN TYP MAX UNITS
SCLK Clock Period
SCLK Duty Cycle
SCLK Fall to DOUT Transition
16th SCLK Fall to DOUT Disable
14th SCLK Fall to DOUT Disable
SCLK Fall to DOUT Enable
DIN to SCLK Rise Setup
SCLK Rise to DIN Hold
CS Fall to SCLK Fall Setup
SCLK Fall to CS Fall Hold
CNVST Pulse Width
CS or CNVST Rise to EOC Low
(Note 8)
tCP
tCH
tDOT
tDOD
tDOE
tDS
tDH
tCSS
tCSH
tCSW
Externally clocked conversion
CLOAD = 10pF
VOVDD = 1.5V to 2.35V
VOVDD = 2.35V to 3.6V
CLOAD = 10pF, channel ID on
CLOAD = 10pF, channel ID off
CLOAD = 10pF
See Figure 6
tCNV_INT See Figure 7, fSAMPLE = 500ksps
125
40
4
4
4
1
4
1
5
60
16.5
15
15
16
14
5.3 6.2
ns
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
Fs
CS Pulse Width
tCSBW
5 ns
Note 2: Limits are 100% production tested at TA = +25NC. Limits over the operating temperature range are guaranteed by design.
Note 3: Channel ID disabled.
Note 4: Tested in single-ended mode.
Note 5: Offset nulled.
Note 6: Line rejection D(DOUT) with VDD = 2.35V to 3.6V and VREF+ = 2.35V.
Note 7: Tested and guaranteed with fully differential input.
Note 8: Conversion time is defined as the number of clock cycles multiplied by the clock period with a 50% duty cycle.
Maximum conversion time: 4.73Fs + N x 16 x TOSC_MAX. Where N is the number of conversions requested (number of
channels scanned, averaged and repeated).
TOSC_MAX = 88.2ns, TOSC_TYP = 75ns.
Note 9: The operational input voltage range for each individual input of a differentially configured pair is from VDD to GND. The
operational input voltage difference is from -VREF+/2 to +VREF+/2 or -VREF+ to +VREF+.
Note 10: See Figure 3 (Equivalent Input Circuit).
Note 11: Guaranteed by characterization.
  11
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