MAX196 Evaluation MAX196 evaluation kit) assembled tested board p

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MAX196 Evaluation MAX196 evaluation kit) assembled tested board p

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19-0473; 2/96
MAX196 Evaluation
MAX196 evaluation kit) assembled tested board prototyping designs using MAX196 12-bit, multi-range data-acquisition system (DAS). board includes voltage buffers analog input channels, designed operated standalone demo mode using binary readout. adapted user-provided 16-bit microprocessor (µP) bus. requires power supply MAX196 ±15V power supplies amps. MAX196 evaluates both MAX196 MAX198. evaluate MAX198, order free sample MAX198BCNI along with MAX196 kit. Maxim also offers complete µP-based system 8-bit interface version this device, MAX197. Refer MAX197 manual.
_Features
Stand-Alone Demo Proven Board Layout User Prototype Area Fully Assembled Tested Jumper-Selectable Configuration
Evaluates: MAX196/MAX198
_Ordering Information
PART MAX196EVKIT-DIP TEMP. RANGE +25°C BOARD TYPE Through-Hole
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800
MAX196 Evaluation Evaluates: MAX196/MAX198
_Component List
DESIGNATION C9-C16 JU1, JU2, JU3, JU12 JU4, JU6-JU11 D0-D11 R4-R15 DESCRIPTION 100pF ceramic capacitor 0.1µF ceramic capacitors 10µF ceramic capacitors 0.01µF ceramic capacitor 0.22µF ceramic capacitor ceramic capacitor 18-pin header Open 2-pin jumpers LEDs 10k, resistors 470k, resistor 620, resistors 10k, 9-pin resistor 100k, 9-pin resistor Maxim MAX196BCNI 74HC74 dual flip-flop 74HC04 inverter Maxim MXL1014CN quad amps 74HC574 octal latch
Table Default Jumper Settings
JUMPER (PD1) (PD0) (RNG) (BIP) (A2) JU10 (A1) JU11 (A0) JU12 SETTING Short (default trace) Short (default trace) Short (default trace) Short Open Open Open Short Short Short Short (default trace)
_Detailed Description
Stand-Alone Demo Circuit Operation
demo circuit state-machine driven 1kHz system clock that generates pulses. circuit runs continuously, writing command word programmed jumpers, displaying results LEDs. power-up, reset flip-flop, generating pulse. rising edge MAX196 latches command word selected JU4-JU11. rising edge system clock sets high, initiating conversion. When MAX196 completes conversion, MAX196 drives low. After falls, goes next rising edge system clock, placing data onto data bus. When goes low, goes high, that next system clock cycle drives high. RD's rising edge latches data into drive display. After returns high, goes low, cycle repeats (Figure
_Quick Start
MAX196 fully assembled tested. Follow these steps verify board operation. turn power supply until connections completed. Connect supply labeled +5V, connect ground return labeled GND. Connect ±15V supplies pads labeled, respectively, OPAMPV+ OPAMPV-. Connect power supply's common terminal kit's pad. configuration jumpers shown Table This selects channel with ±10V input range puts device power-down/internal clock mode. Apply input signal "high-Z" channel input located far-right side board. Turn power supplies. Observe binary readout twelve LEDs.
SYSTEM CLOCK
tCONV
Figure MAX196 Stand-Alone Demo Circuit Timing Diagram
MAX196 Evaluation
Optional Input Buffers
buffers MXL1014 precision quad amps, connected voltage-follower configurations. These amps should normally powered from ±15V (±22V absolute maximum). Applications that only signals power MXL1014 from with good results. MAX196 should driven from output impedance signal source (such amp). on-board amps, drive HI-Z CH0-CH5 input pads. When using off-board low-impedance source, unplug MXL1014s drive DIRECT CH0-CH5 input pads.
Evaluates: MAX196/MAX198
Table Channel Selection
(A2) Short Short Short Short Open Open JU10 (A1) Short Short Open Open Short Short JU11 (A0) Short Open Short Open Short Open CHANNEL
Using External Clock
shipped from factory, MAX196 uses timing capacitor internal clock mode. external clock, apply external clock source EXTCLK input pad. Start with (PD1) (PD0) shorted.
Configuring MAX196
Tables show jumper connections different operating modes MAX196 kit. Refer Table clock power-down modes, Table input range selection, Table channel selection.
Evaluating MAX198
evaluate MAX198, remove MAX196 replace with MAX198BCNI.
Table Clock Power-Down Selection
(PD1) Short Short Open Open (PD0) Short Open Short Open Open Short FUNCTION power-down, external clock mode power-down, internal clock mode Standby power-down between readings Full power-down between readings
Interfacing 16-Bit
MAX196/MAX198 designed connect directly 16-bit using standard chip-select (CS), read strobe (RD), write strobe (WR) signals. JU2, JU3, JU12 must disable stand-alone circuit (Table interface signals provided header interface details, refer MAX196/MAX198 data sheet.
Table Demo Circuit Jumpers
Short Open JU12 Short Open MODE Stand-alone demo Connect userprovided system Short Open
Table Range Polarity Selection
(BIP) Short Short Open Open (RNG) Short Open Short Open MAX196 MAX198 INPUT RANGE INPUT RANGE VREF/2 VREF ±VREF/2 ±VREF
Evaluates: MAX196/MAX198
MAX196 Evaluation
Figure MAX196 Schematic
0.1µF JU12 CUTHERE REFADJ 0.1µF 0.01µF 10µF DEMO CUTHERE EXTCLK 10µF H1-1 H1-14 100pF H1-18 CUTHERE 0.22µF 74HC04 OPEN 470k 74HC74 RDDEMO >CLK BYPASS CAPACITORS OPAMPV+ 0.1µF
HI-Z OPAMPVC10 0.1µF 74HC74 R17, 100k DEMO DEMO JU10 JU11 DIRECT INPUTS HI-Z INPUTS
74HC04 BYPASS CAPACITORS
74HC04
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
DEMO CUTHERE >CLK
H1-13 H1-12 H1-11 H1-10 H1-9 H1-8 H1-7 H1-6 H1-5 H1-4 H1-3 H1-2
DGND H1-15 H1-16 H1-17 MAX196
MXL1014 U4D, U4B,
HI-Z
DEMO
HI-Z
74HC04 74HC04 74HC04 74HC04 74HC04
74HC04
R4-R15,
HI-Z
74HC04 74HC04 74HC04
MXL1014 U5D, U5B,
HI-Z
CLK< 74HC574
HI-Z
74HC04 74HC04
74HC04
74HC574 CLK<
MAX196 Evaluation Evaluates: MAX196/MAX198
Figure MAX196 Component Placement Guide-Component Side
MAX196 Evaluation Evaluates: MAX196/MAX198
Figure MAX196 Board Layout-Component Side
MAX196 Evaluation Evaluates: MAX196/MAX198
Figure MAX196 Board Layout-Solder Side
MAX196 Evaluation Evaluates: MAX196/MAX198
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 (408) 737-7600 1996 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

MAX196 Evaluation MAX196 evaluation kit) assembled tested board p

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