I2C-ADC Gravitech, I2C-ADC Datasheet - Page 3

• Manufacturer Part Number: I2C-ADC
• Description: Data Conversion IC Development Tools I2C 12-BIT 8-CH ANALOG-DIGITAL CONV
• Manufacturer: Gravitech
• Type: ADCr

Specifications of I2C-ADC

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: ADS7828
• Interface Type: I2C
• Operating Supply Voltage: 2.7 V to 5 V
• Description/function: 12-bit, 8 channel analog-to-digital converter
• Dimensions: 0.7 in x 0.7 in

The I2C-ADC board needs an external
2.7VDC – 5.0VDC supply.
Power:
• VCC: is an input power 2.7VDC –
• GND: is a common ground for
I2C-ADC
5.0VDC to I2C-ADC board.
every pin. This pin MUST be
connected to ground of the external
power supply.
Pin No.
1-6
8-9
10
11
12
13
14
Interfaces
7
Copyright © 2007 MicroResearch
GRAVITECH GROUP
TM
CH0 – CH5
GND
CH6 – CH7
NC
SCL
SDA
REF
VCC
I
CONVERTER User Manual
2
C 12-Bit, 8-CH ANALOG-TO-DIGITAL
Name
CH0 (1)
CH1 (2)
CH2 (3)
CH3 (4)
CH4 (5)
CH5 (6)
GND (7)
Pin Configuration
Input
PWR
Input
NC
Input
I/O
PWR
Input
Type
WWW.GRAVITECH.US
Analog input channel 0 to 5
Supply ground
Analog input channel 6 to 7
No connect
Serial clock line
Serial data line
External reference input
Supply voltage
There are eight analog input pins. When
the converter enters the hold mode, the
voltage on the selected CHx pin is
captured on the internal capacitor array.
During the sample period, the source
must
capacitor (typically 25pF). The amount of
charge transfer from the analog source to
the converter is a function of conversion
rate.
Analog input pins:
(13) REF
(12) SDA
(11) SCL
(10) NC
(9) CH7
(14) VCC
(8) CH6
charge
Description
the
internal
sampling