參數(shù)資料
型號(hào): 5962-0724701VXA
廠商: TEXAS INSTRUMENTS INC
元件分類: DAC
英文描述: PARALLEL, WORD INPUT LOADING, 0.0035 us SETTLING TIME, 14-BIT DAC, CBGA192
封裝: CERAMIC, BGA-192
文件頁(yè)數(shù): 18/30頁(yè)
文件大?。?/td> 970K
代理商: 5962-0724701VXA
sw_p(0)
sw_n(0)
sw_n(1)
sw_p(1)
sw_n(N)
sw_p(N)
CSBIAS
External
CSBIAS
Filter
Capacitor
RLOAD
AVDD(3.3V)
IOUT_N
IOUT_P
sw_p(0)
sw_n(0)
sw_n(1)
sw_p(1)
sw_n(N)
sw_p(N)
CSBIAS_IN
CSBIAS
External
CSBIAS
Filter
Capacitor
CurrentSink Array
www.ti.com
SGLS386A – JANUARY 2009 – REVISED DECEMBER 2009
Analog Current Outputs
Figure 23 is a simplified schematic of the current sink array output with corresponding switches. Differential NPN
switches direct the current of each individual NPN current sink to either the positive output node IOUT_P or its
complementary negative output node IOUT_N. The input data presented at the DA_P[13:0], DA_N[13:0],
DB_P[13:0] and DB_N[13:0] is decoded to control the sw_p(N) and sw_n(N) current switches.
Figure 23. Current Sink Array
The external output resistors RLOAD are connected to the positive supply, AVDD.
The DAC5670 can easily be configured to drive a doubly-terminated 50
cable using a properly selected
transformer. Figure 24 and Figure 25 show the 1:1 and 4:1 impedance ratio configuration, respectively. These
configurations provide maximum rejection of common-mode noise sources and even-order distortion
components, thereby doubling the power of the DAC to the output. The center tap on the primary side of the
transformer is terminated to AVDD, enabling a dc current flow for both IOUT_N and IOUT_P.
Copyright 2009, Texas Instruments Incorporated
25
Product Folder Link(s): DAC5670-SP
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PDF描述
5962-0724701VXA PARALLEL, WORD INPUT LOADING, 0.0035 us SETTLING TIME, 14-BIT DAC, CBGA192
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