ADC14DS105KARB/NOPB National Semiconductor, ADC14DS105KARB/NOPB Datasheet - Page 6

• Manufacturer Part Number: ADC14DS105KARB/NOPB
• Description: BOARD EVAL FOR ADC14DS105KARB
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of ADC14DS105KARB/NOPB

• Design Resources: ADC14DS105KARB Ref Design
• Number Of Adc's: 2
• Number Of Bits: 14
• Sampling Rate (per Second): 105M
• Data Interface: Serial
• Inputs Per Adc: 1 Differential
• Power (typ) @ Conditions: 1W @ 105MSPS
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: ADC14DS105
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ADC14DS105KARB

4. The OF/DCS pin jumpers select the output data
5. The TEST pin jumper selects the state of Test
Jumper
position
OPEN
INSTALLED
1. The VCCAA- and VCCAB- jumpers are used to
N
Table 4. ADC Jumper Settings for ADC Clock Duty
* As assembled from factory. Not observed because
ADC14DS105KARB is delivered with the SPI enabled
format (2’s complement or offset binary) and clock
duty cycle correction (active or inactive). Table 2
below shows how to select between the duty cycle
correction modes and output data formats. Please
note that the ADC14DS105KARB evaluation board
is delivered with the ADC14DS105 clock input
configured for NO duty cycle correction and Offset
Binary output data format (Jumper 7-8).
OF/DCS
Jumper
Setting
1-2
3-4
5-6
7-8*
Mode. When the jumper is in place the TEST pin is
asserted HIGH and Test Mode is active. A fixed
test pattern (10100110001110, msb
sourced on all data paths. When the jumper is
removed, the ADCs operate in normal mode. This
pin has no effect when the SPI_EN jumper is
installed (SPI is active), as this the TEST mode is
controlled through the SPI interface.
select the power supply configuration for the
amplifiers. The evaluation board is shipped from
the factory in the dual power supply configuration
(+/- 5V), so these jumpers are not installed. If
single supply operation is desired (+5VDC only),
these jumpers should be installed.
Table 5. TEST Jumper Description
Cycle and Output Data Format (OF/DCS)
Amplifier Power Jumpers
Description
The ADC is in normal operation.
A fixed test pattern
(10100110001110 msb
Clock Mode
No Duty Cycle
Stabilization
Duty
Stabilization
Duty
Stabilization
No Duty Cycle
Stabilization
Cycle
Cycle
ADC14DS105KARB Reference Design Board User’s Guide
Output Data
Format
2’s Complement
2’s Complement
Offset Binary
Offset Binary
lsb)
is output
lsb) is
- 6 -
Jumper position
OPEN
INSTALLED
The LMK02000, which provides the sample clock for
the ADC, must be programmed to correctly configure it
for the proper clock frequency. The programming can
be accomplished by either one of two methods.
The first method is to attach a small PIC-based module
that is included in this evaluation kit. This module is
plugged onto the 10-pin header labeled “UWIRE” as
described in Section 4.4 of this user’s guide. If this
module is used, the JP1 jumper must be installed to
provide power from the main board to the PIC module.
The second method for programming the LMK02000
uses the 10-pin “UWIRE” header to connect the
LMK02000’s serial programming interface (DATA,
CLK, LE) to a PC. To use this programming interface,
a special parallel port (LPT) cable supplied by National
Semiconductor allows the device to be
programmed with a PC using National Semiconductor’s
Codeloader
interface can also be programmed over the USB port of
the PC. To program the LMK02000 through the USB
port, a separate interface board is available from
National
http://www.national.com/appinfo/interface/clk_condition
ers.html
and to order any necessary hardware such as
programming cables or USB interface boards.
4.4 Connecting Power and Signal Sources
1. Connect the ADC14DS105KARB reference board
2. With the WaveVision software running, power-up
Table 6. VCCAA- and VCCAB- Jumper Description
Remove JP1 if using Codeloader to program the
LMK02000.
to
FutureBus connector as shown in Figure 4. The
ADC14DS105KARB reference board should not be
powered up, as the WaveVision hardware does not
support hot-swapping of boards.
the WaveVision 5.1 board, and the WaveVision
software will automatically load the appropriate
firmware
ADC14DS105KARB.
finish downloading before continuing.
the
to download Codeloader, obtain a user’s guide
ADC Sample Clock Programming
software.
WaveVision
to
Semiconductor.
Description
Dual power supply operation
Single power supply operation
allow
data
Allow the firmware file to
The
5.1
board
serial
capture
www.national.com
programming
through
from
Rev 0.2
directly
See
the
the