參數(shù)資料
型號(hào)： TLV5580PW
廠商： Texas Instruments, Inc.
英文描述： 8-BIT, 80 MSPS LOW-POWER A/D CONVERTER
中文描述： 8位，80 MSPS的低功耗A / D轉(zhuǎn)換器
文件頁(yè)數(shù)： 19/34頁(yè)
文件大?。?/td> 531K
代理商： TLV5580PW
TLV5580
8-BIT, 80 MSPS LOW-POWER A/D CONVERTER
SLAS205A – DECEMBER 1998 – REVISED JANUARY 1999
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TLV5580 EVALUATION MODULE
power supplies
The board provides seven power supply connectors (see Table 2). For optimum performance, analog and digital
supplies should be kept separate. Using separate supplies for the digital logic portion of TLV5580 (DV
DD
) and
its output drivers (DRV
DD
) benefits dynamic performance, especially when DRV
DD
is put at the minimum
required voltage (3 V), while DV
DD
might be higher (up to 3.6 V). This lowers the switching noise on the die
caused by the output drivers.
Table 2. Power Supplies
SIGNAL
NAME
CONNECTOR
BOARD
LABEL
DESCRIPTION
DRV3
J1
3DRV
3.3 V digital supply for TLV5580 (digital output drivers)
DV3
J2
3VD
3.3 V digital supply for TLV5580 (digital logic) and peripherals
DV5
J3
5VD
5 V digital supply for D/A converter and peripherals
AV3
J4
3VA
3.3 V analog supply for TLV5580
AV5
J5
5VA
5 V analog supply for onboard reference circuit and D/A converter. Can be left unconnected if
internal references are used and no D/A conversion is required.
AV+12
J6
12VA
12 V analog supply for onboard reference circuit. Can be left unconnected if internal references
are used.
AV–12
J7
–12VA
–12 V analog supply for onboard reference circuit. Can be left unconnected if internal
references are used.
voltage references
SW1 and SW2 switch between internal and external top and bottom references respectively. The external
references are onboard generated from a stable bandgap-derived 3.3 V signal (using TI’s TPS7133 and
quad-opamp TLE2144). They can be adjusted via potentiometers R6 (V
(REFBI)
) and R7 (V
(REFTI)
). It is advised
to power down the internal voltage references by asserting PWN_REF when onboard references are used.
The references are measured at test points TP3 (V
(REFB)
) and TP4 (V
(REFT)
).
DAC output
The onboard DAC is a 10-bit 80 MSPS converter. It is connected back-to-back to the TLV5580. While the user
could use its analog output for measurements, the DAC output is directly connected to connector J8 and does
not pass through an analog reconstruction filter. So mirror spectra from aliased signal components feed through
into the analog output.
For this reason and to separate ADC and DAC contributions, performance measurements should be made by
capturing the ADC output data available on connector J11 and not by evaluating the DAC output.
相關(guān)PDF資料
PDF描述
TLV5592 2-BIT ANALOG-TO-DIGITAL CONVERTER FOR FLEX PAGER CHIPSET
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