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Features

S Windows XP-, Windows Vista-, and Windows 7-Compatible Software S USB-PC Connection (Cable Not Included) S USB Powered (No External Power Supply Required) S Real-Time Data Acquisition Through the USB Component List #Denotes RoHS compliant. Windows, Windows XP, and Windows Vista are registered trademarks of Microsoft Corp. Ordering Information EV Kit Contents The EV kit comes with the following components:

  • MAXADClite evaluation board
  • MAXADClite GUI application *EP = Exposed pad. PART TYPE MAXADClite# EV Kit DESIGNATION QTY DESCRIPTION C1, C2 2 18pF Q5%, 50V ceramic capacitors (0603) C3, C5–C8 5 1FF Q10%, 16V ceramic capacitors (0603) C4, C10, C11, C12 4 0.1FF Q10%, 50V ceramic capacitors (0603) C9 1 10FF Q10%, 10V ceramic capacitor (0805) D1 1 Green LED (0603) D2 1 Yellow LED (0603) J1 1 Mini-USB type-B receptacle J2 0 Not installed, 10-pin JTAG connector J3 1 4-pin header, 100 mill centers J5–J8 0 Not installed R1, R2 2 27I Q5% resistors (0603) DESIGNATION QTY DESCRIPTION R3, R4 2 4.7kI Q5% resistors (0603) R5, R6 2 1kI Q5% resistors (0603) R7, R8 2 499kI Q5% resistors (0603) R9, R10 2 0I Q1% resistors (0603) R11–R15 0 Not installed, resistors (0402) U1 1 12-bit ADC with internal reference (12 WLP) Maxim MAX11645EWC+ U2 1 16-bit microcontroller (64 LQFP) Maxim MAXQ622G-0000+ U3 1 Ultra-low-noise, high-PSRR LDO linear regulator (5 SC70) Maxim MAX8511EXK33+ Y1 1 12MHz crystal — 1 PCB: MAXADClite#

lined refers to items from the Windows operating system. AGND at J3. See Table 1 for more details. 3) Install and run the MAXADClite GUI application. select correct board rev of MAXADClite.

  • Reference: Internal (default) or External
  • Channel: AIN0 (default) or AIN1
  • Input Type: Single-Ended (default) or Differential
  • Input Polarity: Unipolar (default) or Bipolar 6) Next, select the Number of Samples from the Data Logging group box drop-down list. Once all options are set, press the Start Conversion button to proceed (Figure 1). Detailed Description of Hardware The MAXADClite EV kit board is loaded with the MAX11645, Maxim’s smallest, lowest power, 12-bit ADC. The ADC communicates through an I2C interface to the 16-bit RISC MAXQ622 microcontroller with integrated USB serial interface engine (SIE). This microcontroller can be configured as an HID device to communicate witht eh PC over USB (Figure 2). The EV kit microcontroller is preloaded with firmware that communicates with the EV kit GUI application. Upon receiving the logging command from the GUI, it acquires data from the ADC over the I2C bus and sends it to the PC for display and further analysis.

Table 1. MAXADClite Connector J3 Description

2 AIN0 ADC input to channel 0

3 AIN1 ADC input to channel 1

4 AGND Analog ground pin

  • The ADC on the EV kit board can be selected for internal or external reference mode. The internal 2.048V reference is the default configuration. The external reference mode can be selected through software. Apply an external voltage between 1V and VDD at J5 (see Table 2).
  • The input range of the EV kit software is selectable between a unipolar 0 to VREF or ±VREF/2 differential range. The input type is also software selectable between two single-ended inputs or one differential input. The default input configuration is single-end - ed unipolar. In differential mode, the input needs to be connected on both the analog inputs (AIN0 and AIN1) on J3. Refer to the MAX11644/MAX11645 IC data sheet for more information.
  • The EV kit board provides an external 5V supply at J6 to be used with any external circuit (see Table 3).
  • The microcontroller on the EV kit board can also be programmed with custom firmware through the J2 JTAG connector (see Table 4).

Table 2. MAXADClite Connector Table 3. MAXADClite Connector Table 4. MAXADClite Connector *Not directly connected to VUSB. Shunt J4 is for VUSB.

1 VREF External reference voltage input

2 AGND Analog ground pin

1 VUSB 5V, 300mA supply for the external

2 GND Digital ground pin

1 TCK Test clock

3 TDO Test data output

5 TMS Test mode select

6 RST MAXQ610 microcontroller reset pin

8 VUSB* 5V supply for the JTAG debug

9 TDI Test data input

10 GND Digital ground pin

Figure 3. MAXADClite EV Kit Schematic

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 7 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. MAXADClite Evaluation Kit Evaluates: MAX11645

Revision History

0 10/10 Initial release — 1 8/11 Updated Ordering Information, Component List, and replaced PCB layout diagrams 1–5