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MAX11100

16-Bit, +5V, 200ksps ADC with 10µA Shutdown

19-6046; Rev 1; 1/12

Ordering Information appears at end of data sheet.

General Description

The MAX11100 low-power, 16-bit analog-to-digital con-

verter (ADC) features a successive-approximation ADC,

automatic power-down, fast 1.1Fs wake-up, and a high-

speed SPI/QSPI™/MICROWIRE®-compatible interface.

The MAX11100 operates with a single +5V analog supply

and features a separate digital supply, allowing direct

interfacing with 2.7V to 5.25V digital logic.

At the maximum sampling rate of 200ksps, the MAX11100

typically consumes 2.45mA. Power consumption is typi-

cally 12.25mW (V

AVDD

= V

DVDD

= +5V) at a 200ksps

(max) sampling rate. AutoShutdown™ reduces supply

current to 140FA at 10ksps and to less than 10FA at

reduced sampling rates.

Excellent dynamic performance and low power, com-

bined with ease of use and small package size (10-pin

FMAX

and 12-bump WLP), make the MAX11100 ideal

for battery-powered and data-acquisition applications

or for other circuits with demanding power consumption

and space requirements.

Applications

Motor Control

Industrial Process Control

Industrial I/O Modules

Data-Acquisition Systems

Thermocouple Measurements

Accelerometer Measurements

Portable- and Battery-Powered Equipment

Features

S 16-Bit Resolution, No Missing Codes

S +5V Single-Supply Operation

S Adjustable Logic Level (2.7V to 5.25V)

S Input Voltage Range: 0 to V

REF

S Internal Track-and-Hold, 4MHz Input Bandwidth

S SPI/QSPI/MICROWIRE-Compatible Serial Interface

S Small 10-Pin µMAX and WLP Packages

S Low Power

2.45mA at 200ksps

140µA at 10ksps

0.1µA in Power-Down Mode

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a registered trademark of National Semiconductor Corp.

AutoShutdown is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.

Functional Diagram

For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX11100.related

AIN

TRACK-AND-

HOLD

16-BIT SAR

ADC

CONTROL

DVDD

DGND

AGND

AVDD

REF

DOUT

SCLK

MAX11100

OUTPUT

BUFFER

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

Summary of content (21 pages)

PAGE 1
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown General Description The MAX11100 low-power, 16-bit analog-to-digital converter (ADC) features a successive-approximation ADC, automatic power-down, fast 1.1Fs wake-up, and a highspeed SPI/QSPI™/MICROWIRE®-compatible interface. The MAX11100 operates with a single +5V analog supply and features a separate digital supply, allowing direct interfacing with 2.7V to 5.25V digital logic. At the maximum sampling rate of 200ksps, the MAX11100 typically consumes 2.
PAGE 2
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown ABSOLUTE MAXIMUM RATINGS AVDD to AGND........................................................-0.3V to +6V DVDD to DGND........................................................-0.3V to +6V DGND to AGND....................................................-0.3V to +0.3V AIN, REF to AGND................................ -0.3V to (VAVDD + 0.3V) SCLK, CS to DGND..................................................-0.3V to +6V DOUT to DGND.............................
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MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown ELECTRICAL CHARACTERISTICS (continued) (VAVDD = VDVDD = 4.75V to 5.25V, fSCLK = 4.8MHz (50% duty cycle), 24 clocks/conversion (200ksps), VREF = 4.096V, CREF = 4.7FF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS VREF V ANALOG INPUT (AIN) Input Range VAIN Input Capacitance CAIN Input Leakage Current 0 40 SCLK idle 0.
PAGE 4
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown TIMING CHARACTERISTICS (VAVDD = VDVDD = 4.75V to 5.25V, fSCLK = 4.8MHz (50% duty cycle), 24 clocks/conversion (200ksps), VREF = 4.096V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (See Figure 1, Figure 2, Figure 3, and Figure 6.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 1.
PAGE 5
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Typical Operating Characteristics (VAVDD = VDVDD = 5V, fSCLK = 4.8MHz, CLOAD = 50pF, CREF = 4.7FF, VREF = 4.096V, TA = +25NC, unless otherwise noted.) DIFFERENTIAL NONLINEARITY (DNL) vs. CODE 0.8 0.6 0.4 0.2 0.2 DNL (LSB) 0.4 0 -0.2 0 -0.2 -0.4 -0.4 -0.6 -0.6 -0.8 -0.8 -1.0 -1.0 32768 16384 8192 24576 49152 40960 65536 0 57344 24576 49152 40960 MIN DNL -0.5 5.05 5.15 100 MAX11100 toc05 -20 90 80 -40 5.
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MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Typical Operating Characteristics (continued) (VAVDD = VDVDD = 5V, fSCLK = 4.8MHz, CLOAD = 50pF, CREF = 4.7FF, VREF = 4.096V, TA = +25NC, unless otherwise noted.) ANALOG SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY CURRENT vs. SAMPLE RATE IAVDD 0.1000 IDVDD 0.0100 MAX11100 toc10 1.88 IAVDD (mA) SUPPLY CURRENT (mA) 1.0000 1.90 MAX11100 toc09 10.0000 1.86 1.84 1.82 0.0010 1.80 0.0001 10 1 100 4.75 1000 4.85 5.15 5.25 2.
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MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Typical Operating Characteristics (continued) (VAVDD = VDVDD = 5V, fSCLK = 4.8MHz, CLOAD = 50pF, CREF = 4.7FF, VREF = 4.096V, TA = +25NC, unless otherwise noted.) GAIN ERROR vs. ANALOG SUPPLY VOLTAGE OFFSET ERROR vs. TEMPERATURE 100 -100 MAX11100 toc16 0.006 GAIN ERROR (%FS) 300 0.002 -0.002 -0.006 -300 -0.010 -500 -40 -15 10 35 60 4.75 85 4.85 4.95 93.0 MAX11100 toc17 fIN = 1kHz 92.5 SNR AND SINAD (dB) 0.006 GAIN ERROR (%FS) 5.
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MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Pin Configurations TOP VIEW (BUMP SIDE DOWN) MAX11100 1 + REF 2 3 4 AVDD AGND SCLK A AGND REF DGND CS B AIN AGND DVDD C DOUT TOP VIEW DOUT 1 DGND 2 DVDD 3 AGND AIN + 10 SCLK 9 CS 8 AGND 4 7 AVDD 5 6 REF MAX11100 µMAX WLP Pin Description PIN NAME FUNCTION 6 REF External Reference Voltage Input. Sets the analog voltage range. Bypass to AGND with a 4.7FF capacitor.
PAGE 9
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Detailed Description VDD The MAX11100 includes an input track-and-hold (T/H) and successive-approximation register (SAR) circuitry to convert an analog input signal to a digital 16-bit output. Figure 4 shows the MAX11100 in its simplest configuration. The serial interface requires only three digital lines (SCLK, CS, and DOUT) and provides an easy interface to microprocessors (FPs).
PAGE 10
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown tACQ = 13(RS + RIN) x 35pF AIN VREF AIN CS REF SCLK DOUT 4.7µF CS SCLK DOUT MAX11100 AVDD +5V To improve the input signal bandwidth under AC conditions, drive AIN with a wideband buffer (> 4MHz) that can drive the ADC’s input capacitance and settle quickly. 0.1µF +5V DVDD AGND DGND 0.
PAGE 11
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown CS SCLK tCSS 1 4 tCH DOUT tDV tCL tACQ 6 8 16 12 D15 D14 D13 D12 D11 D10 D9 D8 24 20 D7 D6 D5 D4 D3 tDO D2 D1 D0 tCSH tTR Figure 6. External Timing Diagram COMPLETE CONVERSION SEQUENCE CS DOUT CONVERSION 0 POWERED UP CONVERSION 1 POWERED DOWN POWERED UP TIMING NOT TO SCALE. Figure 7. Shutdown Sequence Variations in frequency, duty cycle, or other aspects of the clock signal’s shape result in changing offset.
PAGE 12
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Output Coding and Transfer Function The data output from the MAX11100 is binary and Figure 8 depicts the nominal transfer function. Code transitions occur halfway between successive-integer LSB values (VREF = 4.096V and 1 LSB = 63FV or 4.096V/65536). Applications Information External Reference The MAX11100 requires an external reference with a +3.8V and AVDD voltage range. Connect the external reference directly to REF. Bypass REF to AGND with a 4.
PAGE 13
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown IN1 IN2 A0 A1 4-TO-1 MUX MAX11100 IN3 AIN OUT IN4 CS CLK ACQUISITION CONVERSION CS A0 A1 CHANGE MUX INPUT HERE Figure 9. Change Multiplexer Input Near Beginning of Conversion to Allow Time for Slewing and Settling Serial Interfaces edge and the output is available in MSB-first format. Observe the SCLK to DOUT valid timing characteristic. Clock data into the FP on SCLK’s rising edge.
PAGE 14
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Data can be output in three 8-bit sequences or continuously. The bytes contain the results of the conversion padded with eight leading zeros before the MSB. If the serial clock has not been idled after the LSB (D0) and CS has been kept low, DOUT sends trailing zeros. CS I/O SCK SCLK MISO DOUT VDD SPI SPI and MICROWIRE Interfaces MAX11100 When using the SPI (Figure 10a) or MICROWIRE (Figure 10b) interfaces, set CPOL = 0 and CPHA = 0.
PAGE 15
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown CS CS SCK SCLK MISO DOUT VDD QSPI MAX11100 SS Figure 11a. QSPI Connections 1 SCLK CS 4 6 8 END OF ACQUISITION DOUT* D15 D14 D13 D12 MSB *WHEN CS IS HIGH, DOUT = HIGH-Z 16 12 D11 D10 D9 D8 24 20 D7 D6 D5 D4 D3 D2 D1 D0 HIGH-Z LSB Figure 11b. QSPI Interface Timing Sequence (CPOL = CPHA = 0) VDD VDD SCLK SCK DOUT SDI CS I/O PIC16/17 MAX11100 GND Figure 12a.
PAGE 16
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown 1ST BYTE READ 2ND BYTE READ 12 SCLK 16 CS 0 DOUT* 0 0 0 0 0 0 0 D15 D14 D13 D12 D11 D10 D9 D8 D7 MSB *WHEN CS IS HIGH, DOUT = HIGH-Z 3RD BYTE READ 20 D7 TIMING NOT TO SCALE. D6 D5 D4 24 D3 D2 D1 D0 HIGH-Z LSB Figure 12b. SPI Interface Timing with PIC16/PIC17 in Master Mode (CKE = 1, CKP = 0, SMP = 0, SSPM3 - SSPM0 = 0001) Table 1.
PAGE 17
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Definitions 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-fit straight line fit or a line drawn between the endpoints of the transfer function, once offset and gain errors have been nulled. The static linearity parameters for the MAX11100 are measured using the endpoint method.
PAGE 18
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Supplies, Layout, Grounding, and Bypassing Use PCBs with separate analog and digital ground planes. Do not use wire-wrap boards. Connect the two ground planes together at the MAX11100. Isolate the digital supply from the analog with a low-value resistor (10I) or ferrite bead when the analog and digital supplies come from the same source (Figure 14).
PAGE 19
MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Revision History REVISION NUMBER REVISION DATE 0 9/11 Initial release 1 1/12 Revised the Absolute Maximum Ratings and Electrical Characteristics. DESCRIPTION PAGES CHANGED — 2–4 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied.
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MAX11100 16-Bit, +5V, 200ksps ADC with 10µA Shutdown Maxim Integrated 21