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DAC3484IZAYR Datasheet(PDF) 9 Page - Texas Instruments

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No. de pieza DAC3484IZAYR
Descripción Electrónicos  Quad-Channel, 16-Bit, 1.25 GSPS Digital-to-Analog Converter
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

DAC3484IZAYR Datasheet(HTML) 9 Page - Texas Instruments

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DAC3484
www.ti.com
SLAS749E – MARCH 2011 – REVISED NOVEMBER 2015
Pin Functions - NFBGA
PIN
I/O
DESCRIPTION
NAME
NO.
D10, E11, F11, G11,
AVDD
I
Analog supply voltage. (3.3 V)
H11, J11, K11, L10
CMOS output for ALARM condition. The ALARM output functionality is defined through the
ALARM
N12
O
config7 register. Default polarity is active low, but can be changed to active high via
config0 alarm_out_pol control bit.
Full-scale output current bias. For 30-mA full-scale output current, connect 1.28 k
Ω to
BIASJ
H12
O
ground. Change the full-scale output current through coarse_dac(3:0) in config3,
bit<15:12>
Internal clock buffer supply voltage. (1.2 V)
CLKVDD
C12
I
It is recommended to isolate this supply from DIGVDD and DACVDD.
LVDS positive input data bits 0 through 15. Internal 100-
Ω termination resistor. Data
format relative to DATACLKP/N clock is Double Data Rate (DDR).
N4, N3, N2, N1, M2, L2,
D15P is most significant data bit (MSB)
D[15..0]P
K2, J2, F2, E2, D2, C2,
I
A1, A2, A3, A4
D0P is least significant data bit (LSB)
The order of the bus can be reversed via config2 revbus bit.
P4, P3, P2, P1, M1, L1,
D[15..0]N
K1, J1, F1, E1, D1, C1,
I
LVDS negative input data bits 0 through 15. (See D[15:0]P description above)
B1, B2, B3, B4
DACCLKP
A12
I
Positive external LVPECL clock input for DAC core with a self-bias.
Complementary external LVPECL clock input for DAC core. (see the DACCLKP
DACCLKN
A11
I
description)
D9, E9, E10, F10, G10,
DAC core supply voltage. (1.2 V). It is recommended to isolate this supply from CLKVDD
DACVDD
I
H10, J10, K9, K10, L9
and DIGVDD.
LVDS positive input data clock. Internal 100-
Ω termination resistor. Input data D[15:0]P/N
DATACLKP
G2
I
is latched on both edges of DATACLKP/N (Double Data Rate).
DATACLKN
G1
I
LVDS negative input data clock. (See DATACLKP description)
E5, E6, E7, F5, J5, K5,
Digital supply voltage. (1.2 V). It is recommended to isolate this supply from CLKVDD and
DIGVDD
I
K6, K7
DACVDD.
Used as external reference input when internal reference is disabled through config27
extref_ena = 1b. Used as internal reference output when config27 extref_ena = 0b
EXTIO
G12
I/O
(default). Requires a 0.1-µF decoupling capacitor to AGND when used as reference
output.
LVDS frame indicator positive input. Internal 100-
Ω termination resistor.
The main functions of this input are to reset the FIFO pointer or to be used as a syncing
source. These two functions are captured with the rising edge of DATACLKP/N. The signal
FRAMEP
H2
I
captured by the falling edge of DATACLKP/N can be used as a block parity bit. The
FRAMEP/N signal should be edge-aligned with D[15:0]P/N.
Additionally it is used to indicate the beginning of the frame.
FRAMEN
H1
I
LVDS frame indicator negative input. (See the FRAMEP description)
A10, A13, A14, B10,
B11, B12, B13, C5, C6,
C7, C8, C9, C10, C13,
D8, D13, D14, E8, E12,
E13, F6, F7, F8, F9,
F12, F13, G6, G7, G8,
GND
G9, G13, G14, H6, H7,
I
These pins are ground for all supplies.
H8, H9, H13, H14, J6,
J7, J8, J9, J12, J13, K8,
K13, L8, L13, L14, M5,
M6, M7, M8, M9, M10,
M11, M12, M13, N13,
P13, P14
IOUTAP
B14
O
A-Channel DAC current output. Connect directly to ground if unused.
IOUTAN
C14
O
A-Channel DAC complementary current output. Connect directly to ground if unused.
IOUTBP
F14
O
B-Channel DAC current output. Connect directly to ground if unused.
IOUTBN
E14
O
B-Channel DAC complementary current output. Connect directly to ground if unused.
IOUTCP
J14
O
C-Channel DAC current output. Connect directly to ground if unused.
Copyright © 2011–2015, Texas Instruments Incorporated
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