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DAC38RF8X 데이터시트(PDF) 6 Page - Texas Instruments

부품명 DAC38RF8X
상세설명  Dual-Channel, Differential-Output, 14-Bit, 9-GSPS, RF-Sampling DAC With JESD204B Interface, On-Chip PLL and Wide-Band Interpolation
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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DAC38RF82, DAC38RF89
SLASEA6B – FEBRUARY 2017 – REVISED AUGUST 2017
www.ti.com
Product Folder Links: DAC38RF82 DAC38RF89
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
Pin Functions (continued)
PIN
I/O
DESCRIPTION
NAME
NO.
SYSREF+
A3
I
LVPECL SYSREF positive input, internal 100 Ω differential termination, self biased. This
positive/negative pair is captured with the rising edge of DACCLKP/N. It is used for multiple DAC
synchronization.
SYSREF-
A4
I
LVPECL SYSREF negative input, self biased, internal 100 Ω differential termination. (See the SYSREF+
description)
TCLK
K4
I
JTAG test clock. Internal pull-down
TDI
H4
I
JTAG test data in. Internal pull-up
TDO
J4
O
JTAG test data out. Internal pull-up
TESTMODE
K3
-
This pin is used for factory testing.
Recommended to connect to ground for normal operation.
TMS
K5
I
JTAG test mode select. Internal pull-up
TRST
J5
I
JTAG test reset. Internal pull-up. Must be connected to ground if not used
TXENABLE
K6
I
Transmit enable active high input. Internal pull-down.
This pin is ORed with spi_txenable bit in JESD_FIFO register to enable analog output data transmission.
To enable analog output data transmission, pull CMOS TXENABLE pin to high.
To disable analog output, pull CMOS TXENABLE pin to low. The DAC output is forced to midscale.
VDDA1
F11, J11
I
Analog 1 V supply voltage. Must be separated from VDDDIG1 supply for best performance.
VDDA18
G11, H11
I
Analog 1.8 V supply voltage. (1.8 V)
VDDPLL1
D8, E8
I
Analog 1 V supply for PLL.
VDDAPLL18
B9, B10
I
PLL analog supply voltage. (1.8 V)
VDDAVCO18
D9, E9
I
Analog supply voltage for VCO (1.8 V)
VDDCLK1
G9, H9
I
Internal clock buffer supply voltage (1 V).
It is recommended to isolate this supply from VDDDIG1 and VDDA1.
VDDL1_1
G8, H8
I
DAC core supply voltage. (1 V)
VDDL2_1
G10, H10
I
DAC core supply voltage. (1 V)
VDDDIG1
A5, B5, C5, D5, D7, E3,
E4, E5, E6, F4, F5, G4,
G5
I
Digital supply voltage. (1 V).
It is recommended to isolate this supply from VDDCLK1 and VDDA1.
VDDE1
F7, H7, G6, J6
I
Digital Encoder supply voltage (1 V).
Must be separated from VDDDIG1 supply
VDDIO18
H5
I
Supply voltage for all digital I/O and CMOS I/O. (1.8 V)
VDDOUT18
G12, H12
I
DAC output supply. (1.8 V)
VDDR18
H2, J2
I
Supply voltage for SerDes. (1.8 V)
VDDS18
B3, B4
I
Supply voltage for LVDS SYNC0+/- and SYNC1+/- (1.8 V)
VDDT1
H3, J3
I
Supply voltage for SerDes termination. (1 V)
VDDTX1
B6
I
Supply voltage for divided clock output. (1 V)
VDDTX18
B7
I
Supply voltage for divided clock output . (1.8 V)
VEE18N
D10, E10, K10, L10
I
Analog supply voltage. (-1.8 V)
VOUT1+
L12
O
DAC channel 1 output.
VOUT1-
K12
O
DAC channel 1 complementary output.
VOUT2+
D12
O
DAC channel 2 output.
VOUT2-
E12
O
DAC channel 2 complementary output.
VSENSE
D4
O
Test pin for on chip parametrics. Can be left floating.
VSSCLK
A8, A11, B8, B11, B12,
F8, F9, F10, J8, J9, J10
-
Clock ground.


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