Power Supplies - Texas Instruments ADS1259EVM User Manual

www.ti.com
All logic levels on J7 are 3.3V CMOS, except for the I
Table 2 describes the J7 serial interface pins.
Pin No. Pin Name
J7.1
J7.2
J7.3
J7.4
J7.5
J7.6
J7.7
J7.8
J7.9
J7.10
J7.11
J7.12
J7.13
J7.14
J7.15
J7.16
J7.17
J7.18
J7.19
J7.20
Many pins on J7 have weak pull-up/-down resistors. These resistors provide default settings for many of
the control pins. Furthermore, many pins on J7 correspond directly to pins on the ADS1259. See the
ADS1259 product data sheet
4

Power Supplies

J11 is the power-supply input connector.
PGA280 output amplifier are powered from +5V that can be supplied through the +5VA supply that can be
found on pin J11.3. An additional bipolar supply is needed to power the PGA280 through +VA and –VA
through pins J11.1 and J11.2.
Pin No.
J11.1
J11.2
J11.3
J11.4
J11.5
J11.6
J11.7
J11.8
J11.9
J11.10
SBAU163A – March 2010 – Revised April 2010
Submit Documentation Feedback
Table 2. J7: Serial Data Interface Pins
Signal Name
CNTL Unused
GPIO0 START
CLKX SCLK
DGND DGND
CLKR Unused
GPIO1 RST/PDWN
FSX CS
GPIO2 DOUT
FSR Unused
DGND DGND
DX DIN
GPIO3 CS
DR DOUT
GPIO4 Unused
INT DRDY
SCL SCL
TOUT CLK
DGND DGND
GPIO5 EXTCLK
SDA SDA
for complete details on these pins.
Table 3
Table 3. J11 Configuration: Power-Supply Input
Pin Name
+VA
–VA
+5VA
-5VA
DGND
AGND
+1.8VD
VD1
+3.3VD
+5VD
Copyright © 2010, Texas Instruments Incorporated
2
C™ pins. These pins conform to 3.3V I
I/O Type Pull-up
— —
In High
In None
In/Out None
— —
In High
— —
Out High
— None
In/Out None
In None
In High
Out None
— None
Out None
2
I C n/a
In None
In/Out None
In None
2
I C n/a
lists the configuration details for J11. The ADS1259 and
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
ADS1259EVM, ADS1259EVM-PDK
Power Supplies
2
C rules.
Function
—
ADS1259 START Pin
ADS1259/PGA280 SPI clock
Digital Ground
—
ADS1259 RST/PDWN
ADS1259 SPI Chip Select
PGA280 SPI data out
—
Digital Ground
ADS1259 SPI data in
PGA280 SPI Chip Select
ADS1259 SPI data out
—
ADS1259 SPI Data Ready signal
2
I C clock
Can be used to provide a clock from
a processor
Digital Ground
External Clock input
2
I C data
Required
Yes
Yes
Always
No
Yes
Yes
No
No
Always
No
7