ON Semiconductor NCD9830GEVB User Manual
NCD9830GEVB
NCD9830 Evaluation Board
User's Manual
About This Manual
This manual will enable the user to use NCD9830
Evaluation Board to evaluate functional performance of
NCD9830. A TSSOP−16 socket is available on the board to
avoid the hassle of soldering the device. NCD9830 is tested
by using a digital interface cable along with the supported
software. The test results should be taken to judge the device
functional performance according the specification in the
technical datasheet.
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EVAL BOARD USER’S MANUAL
NCD9830 Product Information
The NCD9830 is a classic successive approximation
analog to digital converter with 8 bit resolution and an
internal 8 channel multiplexer. The converter contains
a capacitive DAC that eliminates the need of a separate
sample and hold circuit. The device has the capabilty to
generate an internal reference voltage for the built-in DAC.
Fast conversion time, low power dissipation and low noise
makes this device ideal for applications like sensors data
acquisition, battery monitoring, remote actuator interface
and gaming consoles/modules and telecommunications.
Communication with the NCD9830 is accomplished via the
2
I
C interface which is compatible with industry standard
© Semiconductor Components Industries, LLC, 2014
October, 2014 − Rev. 0
Figure 1. NCD9830 Evaluation Board
protocols. The NCD9830 is available in a 16 lead TSSOP
package.
Features
• 8 Bit Resolution with Internal 8 channel Multiplexer
• Low Power Operation with Guaranteed Low Noise
SNR
• No Missing Codes and Fast Conversion Time
• Internally Generated Clock and Reference Voltage
• Operational Supply Voltage from 2.7 to 5.5 V
• Meets I
2
C Standard, Fast and High Speed Operation
• Full ROHS Compliant
1 Publication Order Number:
EVBUM2270/D
NCD9830GEVB
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
A1
NCD9830
1
2
3
4
5
6
7
8
11
V
DD
Analog
MUX
GND
8-bit
A-to-D
Converter
1016 9
REFIN/REFOUT
Data Storage
A0
I
Temporary
2
C Interface
SDA SCL
14151213
2.5 V Ref
Figure 2. Block Diagram of NCD9830
HOW TO USE THIS MANUAL
Analog Interface
Two 8 way terminal blocks J1 & J2 are provided for
analog channels. They provide access to the analog input
Table 1. PIN CONFIGURATION OF J1 & J2
Pin Number Signal Notes
J1.1−J1.7 (Odd) CH0−CH3
J1.2−J1.8 (Even) GND Each Channel has Individual Ground
J2.1−J2.7 (Odd) CH4−CH7
J2.2−J2.8 (Even) GND Each Channel has Individual Ground
The analog inputs can be applied to J1 & J2 odd pins
e.g. J1.1 for CH0, J2.3 for CH5 and so on according to the
table above (Each channel name is marked explicitly on the
PCB). Even pins from J1.2−J1.8 & J2.2−J2.8 can be used as
ground for individual input channels.
Reference Voltage
The NCD9830 internal DAC can be configured with an
externally supplied (50 mV to 5 V) reference or an
internally generated reference voltage of 2.5 V. However, t o
pins of the ADC. The pin configurations of J1&J2 are
explained in Table 1.
avail of the full dynamic range an external reference of 5 V
must be used while operating the device at 5 V supply
voltage. The internal 2.5 V reference voltage is sufficient for
full dynamic range while operating the device at 2.7 V.
Jumper J5 is provided to switch external reference
ON/OFF. An inserted jumper corresponds to ON position
while it’s OFF otherwise. A 4 way terminal block J3 is
provided to supply external supply voltage (when a supply
voltage other than 3.3 V is used) and external reference
voltage. The pin configuration of J3 is explained in Table 2.
Table 2. PIN CONFIGURATION OF J3
Pin Number Signal Notes
J3.1 External Supply
J3.3 External Reference
J3.2 & J3.4 GND Individual Ground Provided for Easy Access
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NCD9830GEVB
Power Supply
NCD9830 can be operated at supply voltage range
between 2.7V & 5V. The liberty of supply voltage variation
must be used with appropriate reference voltage selection
(see technical datasheet for more information). Link LK2 is
provided for appropriate supply voltage setting. Position B
corresponds to default value of 3.3V (internally generated)
while position A corresponds to externally supplied supply
voltage. The Board generates 3.3 V from the USB connector
provided. However, if any other operating voltage is
required then that must be supplied externally through J3.1
Table 3. LINKS POSITIONS SELECTION
Selection
3.3 V Supply Voltage with Internal Reference B A A OFF
3.3 V Supply Voltage with External Reference B A A ON
Externally Supplied Voltage with Internal Reference A B B OFF
Externally Supplied Voltage with External Reference A B B ON
and J3.3 as explained in Table 2. The digital interface of the
PCB is operated at 3.3 V. If NCD9830 supply voltage is
selected any value other than 3.3 V then appropriate
management of SCL and SDA signals is required to allow
proper I
2
C operation. Links LK4 & LK5 serve this purpose.
Position A corresponds to 3.3 V operation (default)
whereas, position B corresponds to all other externally
supplied voltages according to the technical datasheet.
A guide to proper selection of Links and jumper is shown in
Table 3.
Links Positions
LK2 LK4 LK5 J5
LK2
J5
LK4 & LK5
Figure 3. Photograph of PCB Side Showing J5, LK2, LK4 & LK5
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