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SSW-105-22-F-DVS-K Datasheet(PDF) 6 Page - Texas Instruments

Part No. SSW-105-22-F-DVS-K
Description  Contains all support circuitry needed
Download  32 Pages
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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SSW-105-22-F-DVS-K Datasheet(HTML) 6 Page - Texas Instruments

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Power Supplies
www.ti.com
4
Power Supplies
P3 is the power-supply input connector. Table 5 lists the configuration details for P3. Only +5V analog and
+5V digital is required to power the EVM. If desired, a jumper option (W6) is provided to supply the
ADS7953 digital core with +3.3V.
Table 5. P3 Configuration: Power-Supply Input
Pin No.
Pin Name
Function
Required
J3.1
+VA
+10V to +15V
No
J3.2
–VA
–10V to –15V
No
J3.3
+5VA
+5V analog supply
Always
J3.4
–5VA
–5V analog supply
No
J3.5
DGND
Digital ground input
Yes
J3.6
AGND
Analog ground input
Yes
J3.7
+1.8VD
1.8V digital supply
No
J3.8
VD1
Not used
No
J3.9
+3.3VD
3.3V digital supply
Yes, if +5VD is not used
J3.10
+5VD
+5V
Yes, if +3.3VD is not used
The ADS7953 digital section can be powered from +3.3V or +5V by means of jumper option W6.
5
Voltage Reference
The ADS7953EVM has three sources for the reference voltage. Jumper W2 can select the REFP voltage
from either the REF5025(U3) or from an external source applied to P1.18. Jumper W3 can select the
REFM voltage from either the analog ground (AGND) or from an external source applied to P1.20.
6
EVM Operation
The following section provides information on the analog input, digital control, and general operating
conditions of the ADS7953EVM.
6.1
Analog Input
Eight of the analog input sources (channels 0-7) can be applied directly to P1 (top or bottom side) or
through signal-conditioning modules available for the modular EVM system. The additional eight channel
sources (CH8-CH15) can be applied to connector J1. The analog input range on the EVM is identical to
that of the installed device and is dependent on the RANGE setting of the ADC (0 to 5V or 0 to 2.5V)
Each input signal can be configured to connect directly to the analog inputs of the ADS7953 through a
33
Ω series resistor with an 0.027pF capacitor to AGND. The input to CH0 can use the OPA365 buffer that
is provided (default condition, W4 jumpered pins 1-2). Jumper W4 can be placed on pins 2-3 to bypass
the unity gain buffer configuration of the OPA365.
6.2
Digital Control
The digital control signals can be applied directly to P5 (top or bottom side). The modular ADS7953EVM
can also be connected directly to a DSP or microcontroller interface board, such as the 5-6KInterface or
HPA-MCUInterface boards available from Texas Instruments. When purchased as part of a PDK, the
ADS7953EVM can be controlled by the MMB0. For a list of compatible interface and/or accessory boards
for the EVM or the ADS7953, see the relevant product folder on the TI website. All of the digital signals
are controlled directly with pins on P2.
6
ADS79xxEVM and ADS79xxEVM-PDK
SLAU262C
– January 2009 – Revised May 2011
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Copyright
© 2009–2011, Texas Instruments Incorporated


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