Linear Technology DC1605B Demo Manual

DESCRIPTION

DEMO MANUAL DC1605B

Programmable Hex

Voltage Supervisor Featuring

the LTC2936 with EEPROM

The DC1605B is a demonstration system that showcases

®

the LT C

2936, a 6-channel I2C/SMBus voltage supervisor

with EEPROM. The LTC2936 simultaneously monitors up
to six power supply voltages and detects undervoltage and
overvoltage conditions. In addition the LTC2936 monitors
two GPI pins and is able to drive three GPIO pins to indicate
OV, UV, system reset, system alert, or other control signal.

The DC1605B is a single circuit board that contains the
LTC2936 and support circuitry to provide the ability to dem
onstrate features

and capabilities of the LTC2936 without

-

the need for external power supplies. The DC1605B demo
board provides an accurate voltage supervision of six chan

­nels and offers over/undervoltage thresholds in various
ranges and increments that are digitally programmable.

This demonstration system is supported by the
LTpowerPlay™ graphical user interface (GUI) which en­ables complete

control of all the features of the device.
Together, the LTpowerPlay software and DC1605B hard­ware system
for

designing and testing configuration settings of the

create a powerful development environment

LTC2936. These settings can be stored in the device’s
internal EEPROM

or in a file. This file can later be used
to order pre-programmed devices or to program devices
in a production environment. The software displays all of
the configuration settings and real time measurements
from the system supervisor and peripheral ICs. Telemetry
allows easy access and decoding of the fault log created
by the LTC2936. The board comes pre-programmed with
the EEPROM values appropriate for the six power supply
rails on the DC1605B. Just plug and play!

The LTC2936 chip is mounted on the topside of the board
with support ADC and DAC circuitry on the back.

The ADC provides voltage readings for all six voltage
supervisor inputs on the LTC2936 and also reads the GPI
and GPIO voltages. The DAC drives six programmable
voltages that are used to emulate the user’s system rails.
The extra support circuitry allows the user to evaluate

the LTC2936 quickly and without the need for external
voltmeters or power supplies.

The DC1605B demo board can be powered by an external
power supply, such as a 12VDC supply. Communication
with the software is provided through the DC1613 USB-to-

2

C/SMBus/PMBus Controller. The following is a checklist

I
of items which can be obtained from the LT C website or
LT C Field Sales.

n

USB-to-I2C/SMBus/PMBus Controller (DC1613)

n

LTpowerPlay Software

DC1605B Features

n

Supervise Six Power Supplies

n

Powered from USB Dongle, Power Jack, or V

n

I2C Adjustable OV/UV Trip Points

n

Guaranteed Threshold Accuracy: ±1%

n

I2C/SMBus Serial Interface

n

Internal EEPROM

n

Six Comparator Outputs

n

256 Programmable Thresholds per Channel

n

Up to Three Range Settings per Channel

n

Tw o General Purpose Inputs

n

Three General Purpose Inputs/Outputs

n

Programmable Output Delays

n

Autonomous Operation without Additional Software

n

Supported by LTpowerPlay GUI

n

LTC2936 Available in 24-Lead QFN and SSOP Packages

IN

Design files for this circuit board are available at

http://www.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.

linear.com/demo/DC1605B

dc1605bf

1

DEMO MANUAL DC1605B

PERFORMANCE SUMMARY

Common Characteristics

PARAMETER CONDITIONS MIN TYP MAX UNITS

Supply Input Voltage Range V

V1 to V6 Threshold Accuracy ±1.0 %

V1 to V6 Monitoring Range Precision Range 0.2 1.2 V

Table 1. Default Thresholds and GPIO Mappings

Vn_THR_LO Vn_THR_HI GPIO1 GPIO2 GPIO3 CMP

Default Thresholds OV ALERT UV

V1 3.2 3.4 Comp_Hi Comp_Hi Comp_Lo Comp_Lo

V2 2.4V 2.6V Comp_Hi Comp_Hi Comp_Lo Comp_Lo

V3 1.7V 1.9V Comp_Hi Comp_Hi Comp_Lo Comp_Lo

V4 1.4V 1.6V Comp_Hi Comp_Hi Comp_Lo Comp_Lo

V5 1.1V 1.3V Comp_Hi Comp_Hi Comp_Lo Comp_Lo

V6 0.95V 1.05V Comp_Hi Comp_Hi Comp_Lo Comp_Lo

Table 2. Default GPI Settings

MANUAL RESET MARGIN UVDISABLE AUX COMP

GPI1

GPI2

ü

ü

PWR

= V

V

PWR

Low Range 0.5 3.0 V

Medium Range 1.0 5.8 V

Specifications are valid over the full operating temperature range.

3.4 13.9 V

DD33

3.2 3.4 V

GLOSSARY OF TERMS

The following list contains terms used throughout the
document.

AUXC – Auxiliary Comparator. A GPI pin may be pro
grammed to this function and map behavior to a GPIO
pin. Nominal V

= 0.5V.

TH

EEPROM – Non-volatile memory (NVM) storage used to
retain data after power is removed.

Margin – Term used typically in board level testing that
increases/decreases the output voltage to look for sensi
tivity/marginality problems.

–

MARG

Ignore margining (OV and UV) when active (low).
A GPI pin may be programmed to this function and map
behavior to a GPIO pin. Nominal V

= 1.0V.

TH

-

-

MR – Manual Reset, Active Low. A GPI pin may be pro-
grammed to this function and map behavior to a GPIO pin,

optionally clear the fault history. Nominal V

and

= 1.0V.

TH

NVM – Non-volatile memory, see EEPROM.

OV – Overvoltage, the result of a voltage comparison that

a pin voltage is above a programmable threshold voltage.

Rail – The final output voltage that the LTC2936 supervises.

Supervise – The act of quickly responding (compared to

a fault setting) to a voltage condition that is compared to
pre-programmed values.

UV – Undervoltage, the result of a voltage comparison that
a pin voltage is below a programmable threshold voltage.

UVDIS – UV Disable. Ignore UVs when the pin is low. A
GPI pin may be programmed to this function and map
behavior to a GPIO pin. Nominal V

= 1.0V.

TH

dc1605bf

2

THEORY OF OPERATION

GENERAL DESCRIPTION

The LTC2936 is a hex voltage supervisor which detects
an overvoltage or undervoltage and signals the system of
a fault condition. The chip has a dedicated power supply
pin, V
may be powered either by powering V
board 5V supply, with an external 3.4V to 13.9V supply,
or with an external 3.3V supply by tying V
pins together.

THE CHIP

, and has an internal 3.3V regulator. The chip

PWR

with the on-

PWR

and V

PWR

DD33

DEMO MANUAL DC1605B

The LTC2936 integrates six voltage supervisors with as
sociated comparator

outputs, two GPIs, and three GPIOs.

-

The V1-V6 supervisors are comprised of OV/UV window
comparators that can be programmed to map the detec

-

tion of a fault to one or more GPIO pin.

In LTpowerPlay, the user programs each voltage supervi­sor’s range

, polarity, mapping, and high and low threshold

voltages.

Each

channel’s high/low comparators may be mapped
to any GPIO pin, and any comparator may be mapped to
multiple GPIO pins. Typically the high comparator is used
for the overvoltage condition and the low comparator is
used for the undervoltage condition. The high comparator is
not dedicated as the OV detection nor is the
dedicated for

UV detection. For example, both comparators

low comparator

may be configured as OV with the Vn_THR_HI set to indicate
an OV Fault and the Vn_THR_LO set for an OV Warning.

HIGH
COMPARATOR

HIGH THR

SETTING

Vn

LOW THR

SETTING

LOW
COMPARATOR

HIGH FAULT

LOW FAULT

GPIO

GPIO & CMP

MAPPING

(Vn_CONFIG)

GPI1 GPI2

INPUT OPTIONS

INPUT/INPUT

INTERNAL

LOGIC

OUTPUT OPTIONS

OUTPUT/OUTPUT WITH OPEN DRAIN
OUTPUT/OUTPUT WITH PULL-UP
SMBALERT (LATCHED) WITH OPEN DRAIN OR WITH PULL-UP

3

GPIO1–CPIO3

6

CMP1–CMP6

DC1605B F01

Figure 1. Simplified Block Diagram of Voltage Supervisor Input

dc1605bf

3

DEMO MANUAL DC1605B

DC1605B F02

THEORY OF OPERATION

The GPI input pins can be used to override fault conditions
by configuring them as MARG or UVDIS. The active-low
MARG function allows the LTC2936 to ignore OV and UV
conditions. The active-low UVDIS function is a special
case of the MARG function. It allows the device to ignore
UV conditions.

INPUT OPTIONS

MANUAL RESET
MARGIN
UV DISABLE

AUXC (NO PULL-UP)

GPIO

THE BOARD

The LTC2936 chip is mounted on the topside of the board
with support ADC and DAC circuitry on the back. The sup
port circuitry is powered from 5V.

The ADC provides voltage readings for all six voltage
inputs to the LTC2936 and also reads the GPI and GPIO

INTERNAL

LOGIC

voltages for a total of eleven. Although the ADC updates
at a relatively slow rate, it provides the equivalent of
eleven 4½-digit digital multimeters. Think of the ADC as
a collection of independent voltage readings, whereas the
LTC2936 simply makes a comparison to each of the Vn
input voltages. The simplest demonstration of the DC1605B

­is to power and control the board via the DC1613 USB

controller. The controller provides 5V supply and I
SMBus read/write control. This setup provides an easy
quick way to demonstrate the LTC2936’s capabilities.

2

C/

24-BIT ADC

2

C BUS

I

12-BIT ADC

(LTC2499)

(LTC2637)

V1-V6, GPI1-2, GPIO1-3

V1-V6

INT 5V,

EXT 3.3V,

OR EXT 4V TO 14V

TOPSIDE COMPONENT
BOTTOM COMPONENT

EXT

INT

2

I

V1

V2

V3

V4

V5

V6

V

C BUS

PWR

GPI1

LTC2936

6-CH VOLTAGE

SUPERVISOR

WITH EEPROM

COMP (1:6)

+5V FROM USB

GPI2

GPIO1

GPIO2

GPIO3

V

DD33

GREEN

POWER

SWITCH

(LTC4415)

5V LDO

(LT1761-5)

BLUE/RED

BLUE/RED

BLUE/RED

BLUE/RED

3.3V

POWER JACK
6V TO 14V

OUT

5V

GREEN

4

Figure 2. Simplified Block Diagram of the DC1605B

dc1605bf

THEORY OF OPERATION

DEMO MANUAL DC1605B

may notice some lag in the update rate of the displayed
voltages.

SELECTING A DEVICE ADDRESS

The

multichannel DAC emulates a 6-channel programmable
power supply that is used to place “rail” voltages at levels
that replicate the user’s system rails. This avoids the need
for the user to wire actual supply rails to the demo board,
however the board was designed to allow this use case.
The DAC output range is 0V to 4V. This is sufficient for
demo purposes. Simply place the V1-V6 jumpers to “INT”
for internal DAC use, and ensure the LTC2936 is powered
by setting JP9 appropriately.

POWERING THE BOARD

The DC1605B board can be powered from the DC1613
USB’s 5V power or from a wall-powered 12V supply
(jack). The LTC2936 hex supervisor can be powered in a
number of different ways. The chip itself is powered from
the on-board 5V supply or an external supply. There is a
table silk-screened onto the board as a reminder. If the
USB power or jack power is present, the +5V LED will
illuminate. The LTC2936 can then be powered by setting
the jumper to “INT .” Alternatively set the jumper to “EXT”
to connect an external power supply voltage to

the V

PWR

turret. With JP9 set to “EXT,” apply an external 3.3V sup-

the jumper is removed, apply an external voltage in

ply. If
the

range 3.4V to 13.9V. The board comes pre-configured
with jumpers JP1-JP6 set to the INTERNAL position which
allows the on-board 5V LDO regulator to power all circuits.

NOTE: Turrets V1-V6 are tied directly to the LTC2936
independent of the jumper settings.

The DC1605B has jumpers (JP7, JP8) labeled ASEL0 and
ASEL1 which allow the user to select one of nine I
dresses. See Table 3.

Table 3. Address Selection of LTC2936

I2C ADDRESS (7-BIT)

0x50 L L •

0x51 L Z

0x52 L H

0x53 Z L

0x54 Z Z

0x55 Z H

0x58 H L

0x59 H Z

0x5A H H

ASEL1

POSITION

ASEL0

POSITION DEFAULT

Regardless of the jumper setting, the part will always

2

respond to the I

C global 7-bit addresses 0x0C and 0x73.

STATUS_WORD REGISTER

The STATUS_WORD register is a read-only register that
provides a summary of fault status on all six HI and LO
comparator outputs, and are determined by the comparator
threshold/configuration settings and Vn voltages. Faults
may be disabled by setting GPI pins to MARG or UVDIS.

RESTORING RAM AND GUI FROM LTC2936

To restore the operating memory (RAM) from the LTC2936
EEPROM contents, click the “R” NVM-to-RAM icon in the
toolbar. To read the RAM registers into the GUI, click the
“R” RAM-to-PC icon in the toolbar.

2

C ad-

The DC1605B uses a multiplexed ADC that is used to
provide voltage readback values. The telemetry plot in
the GUI is similar to a multichannel oscilloscope which is
capable of displaying any parameter that is displayed in
the telemetry window. Due to the nature of a multiplexed
ADC converter, it has an associated ADC loop time. The
total ADC loop time is ~400ms for a given channel. You

DC1605B LEDs

The DC1605B board has two green LEDs. When USB power
(DC1613 Controller) or external power (6V to 14V jack) is
applied, the +5V green LED will illuminate. The +5V supply
provides power to the support circuitry, not necessarily to
the LTC2936.

Jumper JP9 determines how the LTC2936

dc1605bf

5

DEMO MANUAL DC1605B

THEORY OF OPERATION

is powered. The default setting of jumper JP9 is set to
internal 5V and the 3.3V OUT LED will illuminate, indicating
the LTC2936 is powered. If this LED is not illuminated,
the LTC2936 is not in a functioning state, the I
not communicate with the GUI, and the LTC2936 will be
grayed out in the system tree.

DC1605B ToolWindow and GUI Indicators

The ToolWindow displays the ADC readings on the left and
DAC voltage settings on the right. The blue/red indicators
next to the GPIs and GPIOs display the state (H vs. L) and
voltage reading from the ADC (LT2499). Blue indicates a
logic high and red indicates a logic low. The ToolWindow
is automatically populated when LTpowerPlay detects the
DC1605B demo board when it starts. Note that when you
save a project, the DAC settings are saved in the project file.

2

C bus will

6

dc1605bf

LTpowerPlay GUI SOFTWARE

DEMO MANUAL DC1605B

LTpowerPlay is a powerful Windows-based development
environment that supports Linear Technology power
system management ICs with EEPROM, including the
LTC2936 6-channel voltage supervisor. The software
supports a variety of different tasks. You can use LTpow
erPlay to
to
in an offline mode (with no hardware present) in order to
build a multi-chip configuration file that can be saved and
re-loaded at a later time. LTpowerPlay provides unprec
edented system
becomes a valuable diagnostic tool during board bring-up
to program or tweak the power management scheme in

evaluate Linear Technology ICs by connecting

a demo board system. LTpowerPlay can also be used

level diagnostic and debug features. It

-

-

a system or to diagnose power issues when bringing up
rails. LTpowerPlay utilizes the DC1613 I
controller to communicate with one of many potential tar­gets, including
board. The software also provides an automatic update
feature to keep the software current with the latest set
of device drivers and documentation. The LTpowerPlay
software can be downloaded from:

http://www.linear.com/ltpowerplay

To access technical support documents for LT C power
system management products visit “Help
Help” on the L

the DC1605B demo system or a customer

TpowerPlay menu.

2

C/SMBus/PMBus

, View Online

Figure 3. Screenshot of the LTpowerPlay GUI

dc1605bf

7

DEMO MANUAL DC1605B

QUICK START PROCEDURE

The following procedure describes how to set up a DC1605B
demo system.

1. Download and install the LTpowerPlay GUI: www.linear.

com/ltpowerplay

2. Remove the board from the ESD protective bag and

place it on a level surface. Connect the DC1613 I
SMBus/PMBus controller to the DC1605B board using
the 12-pin ribbon cable.

2

C/

2

3. Plug the USB-to-I
USB port on your PC. The board should power up with
+5V and +3.3V
and CMP LEDs will illuminate blue.

C/SMBus/PMBus Controller into a

LEDs illuminated green. The GPIO

OUT

Figure 4. Connecting DC1605B Board and the DC1613 USB to I2C/SMBus/PMBus Controller

8

dc1605bf

QUICK START PROCEDURE

DEMO MANUAL DC1605B

4. Launch the LTpowerPlay GUI.

a. The GUI automatically identifies the DC1605B and

builds a system tree for each I
tree on the left hand side will look like this:

b. A green message box will be displayed momentarily

in the lower left hand corner confirming that the
DC1605B is communicating. The board at this point
is fully operational.

2

C device. The system

SAVING A CONFIGURATION

You can make changes to the LTC2936 register values
and DAC settings. Save the demo board configuration to
a (*.proj) file by clicking the "Save" icon. This creates a
backup file. Name it whatever you like. Note that the DAC
settings are saved in the project file.

QUICK START VIDEO

There is a Quick Start Video that covers the basic features
of the LTC2936 chip and DC1605B demo board. The video
can be accessed via LTpowerPlay by navigating to the Help
menu > DC1605B Content.

5. Load the Demo Configuration.

In the upper left hand corner of the GUI, select File >
Initialize DC1605B Demo > Demo Config (or Factory
Defaults). This will load the configuration settings into
the working RAM of the LTC2936, set the DAC outputs,
clear the status registers, and store the settings into
NVM (EEPROM). The ‘Demo Config’ file is the starting
point for the use cases. The ‘Factory Defaults’ file sets
the Vn thresholds that accommodate the initial powerup
state of the DAC outputs (2.048V).

LOADING A DC1605B CONFIGURATION (*.proj) FILE
WITH THE GUI

1. In the upper left hand corner of the GUI, File > Open
> browse to your *.proj file. This will load the file into
the GUI.

2. Click on the “Go Online” icon, then click on the “PC →
RAM” icon to write all registers. This loads the configu
ration into
settings are stored and retrieved from the .proj file.

3.

To store the configuration to NVM (EEPROM), click on

the “RAM → NVM” icon

the working RAM of the LTC2936. The DAC

-

dc1605bf

9

DEMO MANUAL DC1605B

DC1605B DETAILS – TOP SIDE

Table 2. Default Jumper Configuration

REFERENCE

DESIGNATOR SIGNAL NAME USAGE DEFAULT

JP1 – JP6 V1 – V6 Selects internal vs external voltage INT

JP7, JP8 ASEL1, ASEL0 Selects H/Z/L for LTC2936 slave address L

JP9 VPWR Selects internal 5V, external 3.3V, or remove to apply 3.4V to 14V turret. INT

10

Figure 5. DC1605B Top Side Details

dc1605bf

DEMO BOARD USE CASES

USE CASE #1

A common configuration for the LTC2936 dedicates the
V1 pin to the highest supply in the system and uses V2-V6
to monitor other voltages. The V1 pin provides power to
the chip and also is used to detect an OV or UV on the V1
pin. For simplicity, the USB controller (DC1613) powers
the board and the LTC2936 is powered via the V1 pin with
the jumper set to INT 5V.

Each of the high comparator fault outputs is mapped to
GPIO1, indicating an active-low OV fault. Each of the low
comparator fault outputs are mapped to GPIO3, indicating
an active-low UV fault. These OV and UV conditions are
indicated in multiple places—LEDs next to the GPIO tur
rets and also in the GUI. The GPIO2 pin has been mapped

an active-low latched OV indicator. The latched ALERT

as
is cleared by pressing the GPI1 pushbutton. The GPIO
pins have a red-blue LED which is red when low and blue
when high.

-

DEMO MANUAL DC1605B

tions. Notice that
returns high (blue). This is useful when the system does

want to be informed of a UV condition during margin

not
low testing. Moving the DAC voltages back to 1.2V and
1V returns GPIO3 to a high state (blue), indicating there
is no UV condition.

when the pushbutton is depressed, GPIO3

The two GPI inputs are used to detect a manual reset
(MR) and margin disable (MARG) and activated when the
pushbutton switches are depressed.

GPIO1 → OV fault

GPIO2 → ALERT (latched)

GPIO3 → UV fault

GPI1 → MR (manual reset)

GPI2 → MARG (ignore OV/UV when margining)

Let’s margin V5 and V6 low by typing a value of 1V and

0.9V into the respective DAC control boxes. You may also
move the DAC output by clicking the up/down arrows on
the individual DAC box or by double-clicking the DAC value
and entering a new value in the box. V5 and V6 will report
a UV, turning the LED on GPIO3 red. The dashboard in the
GUI indicates the V5 and V6 voltages are below the LO
thresholds of 0.95V and 1.1V. Also notice in the Telemetry
window a STATUS_WORD register, expand it. This register
is a live indicator of LO or HI fault conditions. Note the state
of LO_FAULT bits when the margin low button is selected.
We can demonstrate the effect of the GPI2 pushbutton at
this point. The GPI2 pin has been programmed to function
as MARG, enabling the LTC2936 to ignore all UV condi

-

dc1605bf

11

DEMO MANUAL DC1605B

DEMO BOARD USE CASES

Let’s margin V5 and V6 high by typing a value of 1.4V and

1.1V into the respective DAC control boxes. V5 and V6
will report an OV in the GUI and on the demo board. Both
GPIO1 and GPIO2 LEDs will turn red and the dashboard
indicates an OV condition and a latched ALERT. Note the
state of HI_FAULT bits in the STATUS_WORD register.
When the GPI2 button is pushed, the GPIO1 (OV) LED is
returned to blue and the STATUS_WORD reflects the MARG
pin as well, clearing the HI_FAULT bits. We can now change
the DACs back to 1.2V and 1.0V. The OV condition is no
longer present, however ALERT (GPIO2) remains latched
low. Since the GPI1 pin is defined as a Manual Reset,
pressing this button clears the latched ALERT, turning
GPIO2 LED blue which indicates a de-asserted high state.

Apply an external supply voltage to the turret. A sensor
or other moderate source impedance voltage may be
supervised on the Vn inputs. A battery voltage may be
supervised since the LTC2936 supply current is < 700µA.

USE CASE #2

The DC1605B demo board can be configured to supervise
external supply voltages. Inputs V1-V6 may be used for
this purpose. Simply move the jumper from INT to EXT
which disconnects the backside DAC, allowing an external
voltage to be applied to the LTC2936. Please ensure the
maximum ratings on the turrets are not exceeded, most
of which are 6V.

For example, a +5V external supply may be connected to
turret V1. Notice the

OV and ALERT are asserted low. The V2 thresholds

cating

to be changed. Enter 5.5V and 4.5V for the HI and LO

need
threshold settings. The GPIO1 will return high and the LED
will change to blue but the GPIO2 remains low (red) since
it indicates a latched ALERT. Press the MR pushbutton on
GPI1 to release GPIO2 back high (LED blue).

The GPI inputs may also be used to monitor external
voltages. These pins can be configured as an auxiliary
comparator (AUXC). In this mode, the GPI pin voltage is
compared to an internal 0.5V reference. Typically an external
voltage divider is provided to obtain the appropriate trip
point for the external voltage. The GPI comparators can
be mapped to one of the GPIOs to alert the system of an
overvoltage or undervoltage condition.

GPIO1 and GPIO2 LEDs turn red, indi-

12

dc1605bf

DEMO BOARD USE CASES

DEMO MANUAL DC1605B

USE CASE #3

Another common configuration is one that uses a GPIO
pin to drive a system reset. The LTC2936 data sheet shows
this feature throughout. The other two GPIOs are config

­ured as previously shown, OV and ALERT. Additionally a
manual

reset pushbutton (GPI1) asserts the system reset.

GPIO1 → RST (system reset)

GPIO2 → OV

GPIO3 → ALERT

GPI1 → MR pushbutton

V1 V2 V3 V4 V5 V6

LTC2936 SYSTEM

MR

GPI1

GPIO1
GPIO2
GPIO3

SDA

GPI2

SCL

RST

OV

ALERT

MARG

3. Configure GPIO1 as active-low with weak pull-up. To
update the changes made in steps 1-3, click the Write
All Registers (PC → RAM) icon.

4. You can optionally extend the low time of the system
reset by changing the delay-on-release setting to ensure
a clean release of reset. This provides a time-based
debounce of the switch.

1. To program GPIO1 to system reset function, first
uncheck the hi_comp mapping of all V1-V6 channels
to GPIO1.

2. Configure GPI1 as a Manual Reset. Map GPI1 to GPIO1.

When configured in this way, GPIO1 provides a system reset
for the host processor and GPI1 can drive a system reset
(GPIO1) with a push of a button. You may set the GPIO1
delay-on-release time to 410 ms to experience the extended
reset firsthand. The UV condition indicator remains on
GPIO3. The OV condition is indicated as a latched ALERT
on GPIO2. When GPI1 pushbutton is pressed, a system
reset is asserted on GPIO1 and the ALERT is released if
the OV condition is removed.

dc1605bf

13

DEMO MANUAL DC1605B

DC1605B DETAILS – TOP

TEST POINT

TURRETS FOR

V1 –V6

TEST POINT TURRETS FOR GPI1–2 SIGNALS

GPI PUSHBUTTON

SWITCHES

SLAVE ADDRESS
JUMPERS

TEST POINT
TURRETS FOR
GPO1–3

CMP1-6
HEADER

V1 –V6

JUMPERS

I2C TURRETS

TO DC1613

TURRET AND LED
INDICATING 5V POWER
FOR DC1605B

6V TO 14V

POWER JACK

dc1605bf

14

DC1605B DETAILS – BOTTOM

DEMO MANUAL DC1605B

dc1605bf

15

DEMO MANUAL DC1605B

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 U1 IC PROG HEX VOLT SUPERVISOR EEPROM SSOP-24 LINEAR: LTC2936CGN#PBF

Additional Demo Board Circuit Components

2 16 C1, C2, C3, C4, C5, C6, C8, C9, C10, C11,

3 8 C7, C15, C16, C17, C18, C26, C28, C33 CAP CER 100nF 16V 10% X7R 0603 MURATA: GRM188R71C104KA01D
4 3 C20, C21, C25 CAP CER 1µF 16V 10% X7R 0603 MURATA: GRM188R71C105KA12D
5 1 C22 CAP CER 22µF 25V 10% X5R 1210 MURATA: GRM32ER61E226KE15L
6 2 C23, C24 CAP CER 10µF 16V 10% X5R 0805 MURATA: GRM21BR61C106KE15L
7 3 LED1-LED3, LED6-LED11 LED-DUAL-COLOR BLUE-RED SS SMD KINGBRIGHT: APHB1608QBDSURKC
8 2 LED4, LED5 LED GREEN SS TYPE BRIGHT SMD PANASONIC-SSG: LNJ326W83RA
9 9 Q1-Q9 DUAL N-CHANNEL FET2N7002DWA DIODES INC.: 2N7002DWA-7

10 6 R1-R6 RES ARRAY 10k/20k 0.1W 0.1% 25ppm 0606 SMD VISHAY: ACASN1002S2002AT
11 10 R7, R10, R25, R27, R48, R67, R70, R73,

12 12 R8, R11, R26, R28, R30, R46, R58, R59,

13

14 2 R15, R16 RES 402k 0.1W 1% 0603 SMD VISHAY: CRCW0603402KFKEA
15 5 R17, R18, R61, R63, R65 RES 200k 0.1W 1% 0603 SMD VISHAY: CRCW0603200KFKEA
16 3 R19, R20, R21 RES 604k 0.1W 1% 0603 SMD VISHAY: CRCW0603604KFKEA
17 6 R22, R23, R24, R62, R64, R66 RES 100k 0.1W 1% 0603 SMD VISHAY: CRCW0603100KFKEA
18 0 R31, R32, R33, R49, R51, R53

19 8 R34, R35, R36, R37, R38, R50, R52, R54 RES 0Ω 0.1W 1% 0603 SMD VISHAY: CRCW060366K5FKEA
20 2 R39, R40 0Ω RESISTOR ARRAY, 4 RES, 1206 PANASONIC: EXB-38VR000V
21 1 R43 RES 49.9k 0.1W 1% 0603 SMD VISHAY: CRCW060349K9FKEA
22 1 R45 RES 249 Ω 0.1W 1% 0603 SMD VISHAY: CRCW0603249RFKEA
23 1 R47 RES 9.31k 0.1W 1% 0603 SMD VISHAY: CRCW06039K31FKEA
24 1 R60 RES 1.50k 0.1W 1% 0603 SMD VISHAY: CRCW06031K50JNEA
25 1 U2 IC ADC 24-BIT DELTA SIGMA 16-CH WITH I
26 1 U3 IC OP AMP DUAL MICROPOWER LINEAR: LTC6078CMS8
27 1 U4 IC DAC 12-BIT OCTAL WITH I
28 1 U5 IC VREF SERIES PRECISION REFERENCE LINEAR: LT6654AMPS6-4.096
29 1 U6 FIXED 5V 100mA MICROPOWER LDO LINEAR: LT1761ES5-5#PBF
30 1 U7 2K-BIT I
31 1 U8 DUAL 4A IDEAL DIODES WITH ADJ CURR LMT LINEAR: LTC4415IMSE#PBF

Hardware: For Demo Board Only

32 1 J1 CONN HEADER 12POS 2mm STR DL PCB FCI: 98414-G06-12ULF
33 1 J2 CONN PWR JACK 2.1mm × 5.5mm HIGH CUR CUI INC.: PJ-002AH
34 6 JP1-JP6, JP9 2mm PIN HEADER 1×3 SULLINS: NRPN031PAEN-RC
35 1 JP7, JP8 2mm PIN HEADER 1×4 SULLINS: NRPN041PAEN-RC
36 1 JP10 0.100" PIN HEADER 1×6 SULLINS: PRPC006SAAN-RC
37 4 MH1-MH4 SPACER STACKING #4 SCREW NYLON KEYSTONE: 8831
38 2 SW1, SW2 BLK SWITCH TACTILE SPST-NO 0.05A 12V C&K: PT S635SL25SMTR LFS
39 19 TP1-TP19 TERM SOLDER TURRET .219"H .109"L MILL MAX:: 2501-2-00-80-00-00-07-0
40 1 TP20 TERM SOLDER TURRET .156"H .084"L MILL MAX: 2308-2-00-80-00-00-07-0

C12, C13, C14, C19, C27, C34

R76

R68, R71, R74, R77

14 R9, R12, R13, R14, R41, R42, R44, R55,

R56, R57, R69, R72, R75, R78

(OPTIONAL)

CAP CER 10nF 25V 10% X7R 0603 MURATA: GRM188R71E103KA01D

RES 3k 0.1W 5% 0603 SMD VISHAY: CRCW06033K0OJNEA

RES 1k 0.1W 5% 0603 SMD VISHAY: CRCW06031K0OJNEA

RES 10k 0.1W 1% 0603 SMD VISHAY: CRCW060310K0FKEA

RES 0Ω 0.1W 1% 0603 SMD

2

C LINEAR: LTC2499CUHF#PBF

2

C LINEAR: LTC2637CMS-HMX12

2

C SERIAL EEPROM MICROCHIP: 24AA02T-I/OT

dc1605bf

16

SCHEMATIC DIAGRAM

DEMO MANUAL DC1605B

dc1605bf

17

DEMO MANUAL DC1605B

SCHEMATIC DIAGRAM

18

dc1605bf

SCHEMATIC DIAGRAM

DEMO MANUAL DC1605B

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa­tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

dc1605bf

19

DEMO MANUAL DC1605B

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LT C for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LT C from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LT C currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica­tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation

Linear Technology Corporation

20

1630 McCarthy Blvd., Milpitas, CA 95035-7417

[phone] ● FAX: [phone] ● www.linear.com

dc1605bf

LT 1014 • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 2014