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參數資料
型號: AD7948ARS-B
廠商: ANALOG DEVICES INC
元件分類: DAC
英文描述: +3.3 V/+5 V Multiplying 12-Bit DACs
中文描述: PARALLEL, 8 BITS INPUT LOADING, 5 us SETTLING TIME, 12-BIT DAC, PDSO20
封裝: SSOP-20
文件頁數: 10/16頁
文件大小: 329K
代理商: AD7948ARS-B
AD7943/AD7945/AD7948
REV. B
–10–
AD7948 PIN FUNCTION DESCRIPTIONS
Pin Mnemonic
Description
I
OUT1
AGND
DAC current output terminal 1. Normally terminated at the virtual ground of output amplifier.
Analog Ground Pin. This pin connects to the back gates of the current steering switches. The DAC I
OUT2
terminal is also connected internally to this point.
Digital Ground Pin.
Chip Select Most Significant Byte. Active Low Input. Used in combination with
WR
to load external data into
the input register or in combination with
LDAC
and
WR
to load external data into both input and DAC registers.
Data Format/Data Override. When this input is low, data in the DAC register is forced to one of two override
codes selected by CTRL. When the override signal is removed, the DAC output returns to reflect the value in
the DAC register. With DF/
DOR
high, CTRL selects either a left or right justified input data format. For normal
operation, DF/
DOR
is held high. See Table I.
DGND
CSMSB
DF/
DOR
CTRL
DB7–DB0
LDAC
Control Input. See DF/
DOR
description.
Digital Data Inputs.
Load DAC input, active low. This signal, in combination with others, is used to load the DAC register from
either the input register or the external data bus.
Chip Select Least Significant (LS) Byte. Active Low Input. Used in combination with
WR
to load external data
into the input register or in combination with
WR
and
LDAC
to load external data into both input and DAC
registers.
CSLSB
WR
Write input, active low. This active low signal, in combination with others is used in loading external data into
the AD7948 input register and in transferring data from the input register to the DAC register.
Power supply input. This is nominally +5 V for Normal Mode Operation and +3.3 V to +5 V for Biased Mode
Operation.
DAC reference input.
DAC feedback resistor pin.
V
DD
V
REF
R
FB
Table II. Truth Table for AD7948 Write Operation
WR
CSMSB
CSLSB
LDAC
Function
0
0
0
0
0
1
1
1
0
0
1
X
0
0
1
1
1
X
1
0
1
0
0
X
Load LS Byte to Input Register
Load LS Byte to Input Register and DAC Register
Load MS Byte to Input Register
Load MS Byte to Input Register and DAC Register
Load Input Register to DAC Register
No Data Transfer
Table I. Truth Table for DF/
DOR
CTRL
DF/
DOR
CTRL
Function
0
0
1
1
0
1
0
1
DAC Register Contents Overridden by All 0s
DAC Register Contents Overridden by All 1s
Left-Justified Input Data Selected
Right-Justified Input Data Selected
相關PDF資料
PDF描述
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相關代理商/技術參數
參數描述
AD7948ARS-BREEL 功能描述:IC DAC 12BIT MULT PARALL 20-SSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:- 產品培訓模塊:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色產品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 標準包裝:91 系列:- 設置時間:4µs 位數:10 數據接口:MICROWIRE?,串行,SPI? 轉換器數目:8 電壓電源:單電源 功率耗散(最大):2.7mW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應商設備封裝:14-DFN-EP(4x3) 包裝:管件 輸出數目和類型:8 電壓,單極 采樣率(每秒):*
AD7948ARSZ-B 功能描述:IC DAC 12BIT MULT PARALL 20SSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:- 標準包裝:1 系列:- 設置時間:4.5µs 位數:12 數據接口:串行,SPI? 轉換器數目:1 電壓電源:單電源 功率耗散(最大):- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 供應商設備封裝:8-SOICN 包裝:剪切帶 (CT) 輸出數目和類型:1 電壓,單極;1 電壓,雙極 采樣率(每秒):* 其它名稱:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND
AD7948ARSZ-BREEL 功能描述:IC DAC 12BIT MULT PARALL 20SSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:- 產品培訓模塊:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色產品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 標準包裝:91 系列:- 設置時間:4µs 位數:10 數據接口:MICROWIRE?,串行,SPI? 轉換器數目:8 電壓電源:單電源 功率耗散(最大):2.7mW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應商設備封裝:14-DFN-EP(4x3) 包裝:管件 輸出數目和類型:8 電壓,單極 采樣率(每秒):*
AD7948BN 功能描述:IC DAC 12BIT MULT PARALL 20-DIP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:- 標準包裝:47 系列:- 設置時間:2µs 位數:14 數據接口:并聯 轉換器數目:1 電壓電源:單電源 功率耗散(最大):55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP(0.209",5.30mm 寬) 供應商設備封裝:28-SSOP 包裝:管件 輸出數目和類型:1 電流,單極;1 電流,雙極 采樣率(每秒):*
AD7948BNZ 功能描述:IC DAC 12BIT MULT PARALL 20DIP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:- 標準包裝:1 系列:- 設置時間:4.5µs 位數:12 數據接口:串行,SPI? 轉換器數目:1 電壓電源:單電源 功率耗散(最大):- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 供應商設備封裝:8-SOICN 包裝:剪切帶 (CT) 輸出數目和類型:1 電壓,單極;1 電壓,雙極 采樣率(每秒):* 其它名稱:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND
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