MAX11138ATI+ Maxim Integrated, MAX11138ATI+ Datasheet

MAX11138ATI+

Manufacturer Part Number

MAX11138ATI+

Description

Analog to Digital Converters - ADC 500ksps, Low-Power, Serial 12-/10-/8-Bit

Manufacturer

Maxim Integrated

Datasheet

1.MAX11140ATI.pdf (40 pages)

Specifications of MAX11138ATI+

Rohs

yes

Number Of Channels

4/2

Architecture

SAR

Conversion Rate

500 kSPs

Resolution

10 bit

Input Type

Single-Ended/Differential

Snr

61.7 dB

Interface Type

3-Wire, QSPI, SPI

Operating Supply Voltage

2.35 V to 3.6 V

Maximum Operating Temperature

+ 125 C

Mounting Style

SMD/SMT

Package / Case

TQFN-28

Maximum Power Dissipation

2758 mW

Minimum Operating Temperature

- 40 C

Number Of Converters

Voltage Reference

1 V

Current page: 1 of 40
Download datasheet (3Mb)

The MAX11135–MAX11143 are 12-/10-/8-bit with exter-

nal reference and industry-leading 1.5MHz, full linear

bandwidth, high speed,

cessive-approximation register (SAR) analog-to-digital

converters (ADCs). The MAX11135–MAX11143 include

both internal and external clock modes.

feature scan mode in both internal and external clock

modes. The internal clock mode features internal averag-

ing

the SampleSetK technology, a user-programmable ana-

log input channel sequencer.

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.

MAX11143

consume only 4.2mW at 500ksps.

The MAX11135–MAX11143 include

fast wake-up, and a high-speed 3-wire serial interface.

The devices feature full power-down mode for optimal

power management.

The

QSPIK, and MICROWIRE

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

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.

to increase

8MHz,

3-wire serial interface directly connects to SPI,

operate from a 2.35V to 3.6V supply and

SNR. The external clock mode features

appears at end of data sheet.

500ksps, Low-Power, Serial 12-/10-/8-Bit,

General Description

low-power,

devices without external logic.

The

SampleSet

serial output suc-

AutoShutdownK,

The

These devices

MAX11135–

approach

S Scan Modes, Internal Averaging, and Internal

S 16-Entry First-In/First-Out (FIFO)

S SampleSet: User-Defined Channel Sequence with

S Analog Multiplexer with True Differential

S Two Software-Selectable Bipolar Input Ranges

S Flexible Input Configuration Across All Channels

S High Accuracy

S 70dB SINAD Guaranteed at 250kHz Input

S 1.5V to 3.6V Wide Range I/O Supply

S 2.35V to 3.6V Supply Voltage

S Longer Battery Life for Portable Applications

S External Differential Reference (1V to V

S 8MHz, 3-Wire SPI-/QSPI-/MICROWIRE-/DSP-

S Wide -40NC to +125NC Operation

S Space-Saving, 28-Pin, 5mm x 5mm TQFN

S 500ksps Conversion Rate, No Pipeline Delay

S 12-/10-/8-Bit Resolution

For related parts and recommended products to use with this part,

refer to www.maxim-ic.com/MAX11135.related.

Clock

Maximum Length of 256

Track/Hold

 16-/8-/4-Channel Single-Ended

 8-/4-/2-Channel Fully-Differential Pairs

 15-/8-/4-Channel Pseudo-Differential Relative to

 QV

 Q1 LSB INL, Q1 LSB DNL, No Missing Codes

Frequency

 Allows the Serial Interface to Connect Directly

 Low Power

 4.2mW at 500ksps with 3V Supplies

 2µA Full-Shutdown Current

Compatible Serial Interface

Packages

Over Temperature Range

to 1.8V, 2.5V, or 3.3V Digital Systems

MAX11135–MAX11143

a Common Input

4-/8-/16-Channel ADCs

High-Speed Data Acquisition Systems

High-Speed Closed-Loop Systems

Industrial Control Systems

Medical Instrumentation

Battery-Powered Instruments

Portable Systems

REF+

/2, QV

E V A L U A T I O N K I T A V A I L A B L E

REF+

Benefits and Features

Applications

19-6215; Rev 1; 7/12

)

Related parts for MAX11138ATI+

MAX11138ATI+ Summary of contents

Page 1

Low-Power, Serial 12-/10-/8-Bit, General Description The MAX11135–MAX11143 are 12-/10-/8-bit with exter- nal reference and industry-leading 1.5MHz, full linear bandwidth, high speed, low-power, cessive-approximation register (SAR) analog-to-digital converters (ADCs). The MAX11135–MAX11143 include both internal and external clock modes. feature scan ...

Page 2

Low-Power, Serial 12-/10-/8-Bit, ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +4V DD OVDD, AIN0–AIN13, CNVST/AIN14, REF+, REF-/AIN15 to GND ......................-0.3V to the lower of (V CS, SCLK, DIN, DOUT, EOC TO GND .......-0.3V to the lower of DGND ...

Page 3

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11135/MAX11136/MAX11137) (continued 2.35V to 3.6V 1.5V to 3.6V OVDD unless otherwise noted. Typical values are at T PARAMETER SYMBOL Full-Power Bandwidth Full-Linear Bandwidth Crosstalk CONVERSION RATE Power-Up Time ...

Page 4

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11135/MAX11136/MAX11137) (continued 2.35V to 3.6V 1.5V to 3.6V OVDD unless otherwise noted. Typical values are at T PARAMETER DIGITAL INPUTS (SCLK, DIN, CS, CNVST) Input Voltage Low Input ...

Page 5

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11135/MAX11136/MAX11137) (continued 2.35V to 3.6V 1.5V to 3.6V OVDD unless otherwise noted. Typical values are at T PARAMETER TIMING CHARACTERISTICS (Figure 1) (Note 11) SCLK Clock Period SCLK ...

Page 6

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11138/MAX11139/MAX11140) (continued 2.35V to 3.6V 1.5V to 3.6V OVDD unless otherwise noted. Typical values are at T PARAMETER DYNAMIC PERFORMANCE (250kHz, input sine wave) (Notes 3 and 7) ...

Page 7

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11138/MAX11139/MAX11140) (continued 2.35V to 3.6V 1.5V to 3.6V OVDD unless otherwise noted. Typical values are at T PARAMETER EXTERNAL REFERENCE INPUT REF- Input Voltage Range REF+ Input Voltage ...

Page 8

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11138/MAX11139/MAX11140 2.35V to 3.6V 1.5V to 3.6V OVDD +125NC, unless otherwise noted. Typical values are at T PARAMETER TIMING CHARACTERISTICS (Figure 1) (Note 11) SCLK Clock Period SCLK ...

Page 9

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11141/MAX11142/MAX11143) (continued 2.35V to 3.6V 1.5V to 3.6V OVDD unless otherwise noted. Typical values are at T PARAMETER DYNAMIC PERFORMANCE (250kHz, input sine wave) (Notes 3 and 7) ...

Page 10

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11141/MAX11142/MAX11143) (continued 2.35V to 3.6V 1.5V to 3.6V OVDD unless otherwise noted. Typical values are at T PARAMETER EXTERNAL REFERENCE INPUT REF- Input Voltage Range REF+ Input Voltage ...

Page 11

Low-Power, Serial 12-/10-/8-Bit, ELECTRICAL CHARACTERISTICS (MAX11141/MAX11142/MAX11143) (continued 2.35V to 3.6V 1.5V to 3.6V OVDD unless otherwise noted. Typical values are at T PARAMETER TIMING CHARACTERISTICS (Figure 1) (Note 11) SCLK Clock Period SCLK ...

Page 12

Low-Power, Serial 12-/10-/8-Bit CSS 1ST SCLK CLOCK DIN t DOE DOUT Figure 1. Detailed Serial-Interface Timing Diagram (MAX11135ATI+/MAX11136ATI+/MAX11137ATI+, T INTEGRAL NONLINEARITY vs. DIGITAL OUTPUT CODE 1 1.0Msps SAMPLE 0.8 0.6 0.4 ...

Page 13

Low-Power, Serial 12-/10-/8-Bit, (MAX11135ATI+/MAX11136ATI+/MAX11137ATI+, T GAIN ERROR vs. TEMPERATURE -40 -25 - TEMPERATURE (°C) THD vs. ANALOG INPUT FREQUENCY - 1.0Msps SAMPLE -85 ...

Page 14

Low-Power, Serial 12-/10-/8-Bit, (MAX11135ATI+/MAX11136ATI+/MAX11137ATI+, T 250kHz SINE-WAVE INPUT (8192-POINT FFT PLOT 1Msps SAMPLE f = 250kHz IN -20 -40 -60 -80 -100 -120 0 100 200 FREQUENCY (kHz) ANALOG SUPPLY CURRENT vs. TEMPERATURE 3 ...

Page 15

Low-Power, Serial 12-/10-/8-Bit, TOP VIEW DGND 22 OVDD 23 DOUT 24 MAX11135 25 EOC MAX11138 MAX11141 26 AIN0 27 AIN1 + 28 AIN2 TQFN 4 ...

Page 16

Low-Power, Serial 12-/10-/8-Bit, MAX11135 MAX11136 MAX11138 MAX11139 MAX11141 MAX11142 (4 CHANNEL) (8 CHANNEL) — — — 26, 27, 28, 1–5 26, 27, 28, 1 — 2–11 6–11 — — — — 14, 16 14, 16 ...

Page 17

Low-Power, Serial 12-/10-/8-Bit, AIN0 AIN1 AIN15 Detailed Description The MAX11135–MAX11143 are 12-/10-/8-bit with external reference and industry-leading 1.5MHz, full linear band- width, high-speed, low-power, serial output successive- approximation register (SAR) analog-to-digital converters (ADC). These devices feature scan mode, internal ...

Page 18

Low-Power, Serial 12-/10-/8-Bit, The ADC’s input-tracking circuitry features a 1.5MHz, small-signal, full-linear bandwidth to digitize high-speed transient events and measure periodic signals with bandwidths exceeding the ADC’s sampling rate by using undersampling techniques. Anti-alias filtering of the input signals ...

Page 19

Low-Power, Serial 12-/10-/8-Bit SCLK DI[15] DI[14] DIN 0 MSB] MSB-1 MSB-2 DOUT Figure 2c. External Clock Timing Diagram with CHAN_ID=0 Single-Ended, Differential, and Pseudo-Differential Input The MAX11135–MAX11143 include analog input channels ...

Page 20

Low-Power, Serial 12-/10-/8-Bit, OUTPUT CODE (hex) FFF REF+ FFE REF+ FFD 1 LSB = 4096 FFC FFB 004 003 002 001 000 INPUT VOLTAGE (LSB) Figure 4. ...

Page 21

Low-Power, Serial 12-/10-/8-Bit INTERNALLY CLOCKED ACQUISITIONS AND CONVERSIONS CNVST t CSW CS EOC t CNV_INT SCLK DIN DOUT INTERNAL OSCILLATOR ON SCAN OPERATION AND RESULTS STORED IN FIFO Figure 6. Internal Conversions with CNVST (N = ...

Page 22

Low-Power, Serial 12-/10-/8-Bit, The MAX11135–MAX11143 produce a digital output that corresponds to the analog input voltage as long as the analog inputs are within the specified operating range. Internal protection diodes confine the analog input volt- age within the ...

Page 23

Low-Power, Serial 12-/10-/8-Bit, into ADC memory, the pattern may be repeated indefi- nitely or changed at any time. For example, the maximum throughput of MAX11135– MAX11143 is 500ksps. Traditional ADC scan modes allow up to 16-channel conversions in ascending ...

Page 24

Low-Power, Serial 12-/10-/8-Bit, In averaging mode, the device performs the specified number of conversions and returns the average for each requested result in the FIFO. The averaging mode works with internal clock only. Scan Modes and Unipolar/Bipolar Setting When ...

Page 25

Low-Power, Serial 12-/10-/8-Bit, Table 2. ADC Mode Control Register (continued) DEFAULT BIT NAME BIT STATE PM[1:0] 4:3 00 CHAN_ID 2 SWCNV 1 — 0 Table 3. ADC Scan Control SCAN3 SCAN2 SCAN1 SCAN0 ...

Page 26

Low-Power, Serial 12-/10-/8-Bit, Table 3. ADC Scan Control (continued) SCAN3 SCAN2 SCAN1 SCAN0 MODE NAME Scans channels 0 through N Clock mode: External clock ...

Page 27

Low-Power, Serial 12-/10-/8-Bit, Table 3. ADC Scan Control (continued) SCAN3 SCAN2 SCAN1 SCAN0 Table 4. Analog Input Channel ...

Page 28

Low-Power, Serial 12-/10-/8-Bit, The MAX11135–MAX11143 feature three power-down modes. The devices shut down when the SPM bits in the ADC Configuration register are asserted two shutdown options: U Full shutdown where all circuitry is shutdown. U Partial shutdown where ...

Page 29

Low-Power, Serial 12-/10-/8-Bit, Table 6. ADC Configuration Register (continued) DEFAULT BIT NAME BIT NAVG[1:0] 8:7 NSCAN[1:0] 6:5 SPM[1:0] 4:3 ECHO 2 — 1:0 STATE Valid for internal clock mode only. AVGON NAVG1 NAVG0 ...

Page 30

Low-Power, Serial 12-/10-/8-Bit, Table 7. RANGE Register (RANGE Settings Only Applies to Bipolar Fully Differential Analog Input Configurations) BIT NAME BIT RANGE_SETUP 15:11 RANGE0/1 10 RANGE2/3 9 RANGE4/5 8 RANGE6/7 7 RANGE8/9 6 RANGE10/11 5 RANGE12/13 4 RANGE14/15 3 ...

Page 31

Low-Power, Serial 12-/10-/8-Bit, Table 8. Analog Input Configuration and Unipolar/Bipolar Waveforms ANALOG INPUT CONFIGURATION Unipolar Single- REF+ (Binary Ended Coding) Unipolar Fully REF+ (Binary Differential Coding) Fully Bipolar REF+ Differential (2’s Comp) Table 9. ADC Output as a Function ...

Page 32

Low-Power, Serial 12-/10-/8-Bit, Table 10. Unipolar Register DEFAULT BIT NAME BIT STATE UNI_SETUP 15:11 UCH0/1 10 UCH2/3 9 UCH4/5 8 UCH6/7 7 UCH8/9 6 UCH10/11 5 UCH12/13 4 UCH14/15 3 PDIFF_COM 2 — 1:0 Table 11. Bipolar Register DEFAULT ...

Page 33

Low-Power, Serial 12-/10-/8-Bit, Table 12. Custom Scan0 Register DEFAULT BIT NAME BIT STATE CUST_SCAN0 15:11 CHSCAN15 10 CHSCAN14 9 CHSCAN13 8 CHSCAN12 7 CHSCAN11 6 CHSCAN10 5 CHSCAN9 4 CHSCAN8 3 — 2:0 Table 13. Custom Scan1 Register BIT ...

Page 34

Low-Power, Serial 12-/10-/8-Bit, CS SCLK 1 DIN DOUT WRITE SampleSet REGISTER DEFINE SEQ_LENGTH Figure 10. SampleSet Timing Diagram Upon receiving the SampleSet pattern, the user can set the ADC Mode Control register to begin the conver- sion process where ...

Page 35

Low-Power, Serial 12-/10-/8-Bit, EXTERNAL SINGLE-ENDED SELECT ADC CONFIGURATION REGISTER SET REFSEL BIT TO 0 SINGLE-ENDED PSEUDO- DIFFERENTIAL PSEUDO-DIFFERENTIAL SELECT UNIPOLAR AND SELECT UNIPOLAR AND BIPOLAR REGISTER SET PER REGISTER SET BIT PDIFF_COM CHANNEL UCH{X}/{X+ FOR PSEUDO- AND ...

Page 36

Low-Power, Serial 12-/10-/8-Bit, YES REPEAT NO ADC CONFIGURATION REGISTER YES STANDARD-INT NO ADC CONFIGURATION REGISTER YES UPPER-INT NO ADC CONFIGURATION REGISTER YES CUSTOM-INT NO ADC CONFIGURATION REGISTER Figure 12. ADC Mode Select Programming Sequence INTERNAL INTERNAL/EXTERNAL CLOCK NO AVERAGE ...

Page 37

Low-Power, Serial 12-/10-/8-Bit, Choosing a Reference For devices using an external reference, the choice of the reference determines the output accuracy of the ADC. An ideal voltage reference provides a perfect initial accu- racy and maintains the reference voltage ...

Page 38

Low-Power, Serial 12-/10-/8-Bit, Integral Nonlinearity Integral nonlinearity (INL) is the deviation of the values on an actual transfer function from a straight line. This straight line can be either a best-straight-line fit or a line drawn between the end ...

Page 39

... Low-Power, Serial 12-/10-/8-Bit, PART PIN-PACKAGE MAX11135ATI+ 28 TQFN-EP* MAX11136ATI+ 28 TQFN-EP* 28 TQFN-EP* MAX11137ATI+ MAX11138ATI+ 28 TQFN-EP* MAX11139ATI+ 28 TQFN-EP* MAX11140ATI+ 28 TQFN-EP* MAX11141ATI+ 28 TQFN-EP* 28 TQFN-EP* MAX11142ATI+ MAX11143ATI+ 28 TQFN-EP* Note: All devices are specified over the -40°C to +125°C temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. ...

Page 40

... Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Products, Inc. 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 2012 Maxim Integrated Products © ...

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