Power Supplies; Connectors For J7; J3 Configuration: Power-Supply Input - Texas Instruments ADS1282EVM User Manual

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Pin No.
J5.17
J5.18
J5.19
J5.20
Many pins on J5 have weak pull-up/-down resistors. These resistors provide default settings for many of
the control pins. Many pins on J5 correspond directly to ADS1282 pins. See the
sheet for complete details on these pins.
4

Power Supplies

J8 is the power-supply input connector.
ADC can be applied directly to the device (see
needed to power the bipolar amplifiers. For optimum noise performance, the external supplies (+VA and
–VA) should be used.
Pin No.
J8.1
J8.2
J8.3
J8.4
J8.5
J8.6
J8.7
J8.8
J8.9
J8.10
4.1 Bipolar Power Options
The voltage used to power the operational amplifiers is +10V and –10V pins J8.1 and J8.2. If using bipolar
mode ±5V supplies must be connected to pins J8.3 and J8.4. The ±5V is regulated down to ±2.5V with
U10 and U13 in bipolar mode. Jumpers must be properly placed across J7.1 and J7.2 as well as J7.3 and
J7.4 to properly power the ADS1282 (shown in
SBAU144C – March 2009 – Revised May 2011
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Table 2. J5: Serial Interface Pins (continued)
Pin Name Signal Name
TOUT CLK
DGND DGND
GPIO5 EXTCLK
SDA SDA
Table 3
Section
Table 3. J3 Configuration: Power-Supply Input
Pin Name
+VA
–VA
+5VA
–5VA
DGND
AGND
+1.8VD
VD1
+3.3VD
+5VD
Figure 1. Connectors for J7
Copyright © 2009–2011, Texas Instruments Incorporated
I/O Type Pullup
In None
In/Out None
In None
2
I C n/a
lists the configuration details for J8. Analog inputs to the
8.1, Analog Input). An additional bipolar supply is
Function
+10V to +15V
–10V to –15V
+5V analog supply
–5V analog supply
Digital ground input
Analog ground input
1.8V digital supply
Not used
3.3V digital supply
+5V
Figure 1).
ADS1282EVM and ADS1282EVM-PDK User's Guide
Power Supplies
Function
Can be used to provide
a clock from a
processor
Digital ground
External clock input
2
I C data
ADS1282 product data
Required
Yes
Yes
Always
No; only for bipolar
mode
Yes
Yes
No
No
Always
No
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