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參數(shù)資料
| 型號： | SPT5240 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 10-bit, 400 MWPS Current Output Digital-to-Analog Converter |
| 中文描述： | 10位，400 MWPS電流輸出數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 102K |
| 代理商： | SPT5240 |
REV. 1 June 2003
7
SPT5240
DATA SHEET
Theory of Operation
The SPT5240 is a 10-bit 400 MWPS digital-to-analog
converter. It integrates a DAC core with a bandgap reference
and operates from a +3.3V power supply.
The DAC architecture is a compound differential current
output DAC consisting of a 6-bit fully segmented DAC for
the MSBs and a 4-bit fully segmented DAC for the LSBs.
The input cell, followed by a master-slave latch, buffers the
digital inputs. A 6:64 decoder decodes the digital data for
the MSBs, and a 4:16 decoder does so for the LSBs. The
outputs of the decoders are latched using a second bank
of master-slave latches whose outputs then drive differential
current switches, which steer the appropriate current to
the IO
P
or IO
N
outputs.
The analog (AV
DD
) and digital (DV
DD
) power supplies are
separated on chip to allow flexibility in the interface board.
The analog (AGND) and digital (DGND) are separated on
chip. Circuit board ground planes should be separated and
tied together with a ferrite bead.
t
D
t
settling
N
N+1
N-1
N+1
N-2
N
N+1
N+3
CLK
Digital
Inputs
VO
P
1 LSB
1 LSB
VO
N
N
N+2
t
S
t
H
NOTE:
Not to scale. For definition purposes only.
Figure 1: Timing Diagram
Pin Configuration
Pin Assignments
Analog Outputs
IO
P
DAC current output. Full-scale output at 11…11
input code.
Complementary current output. Full-scale output
at 00…00 input code.
Digital Inputs
D0 – D9
Digital inputs (D0 = LSB).
PWD
Power down mode pin. Active high. Internally
pulled down.
CLK
Clock input pin. Data is latched on the rising edge.
Reference
I
SET
Full-scale adjust control. Connection for
reference-current setting resistor.
Power
AGND
Analog Supply Ground.
DGND
Digital Supply Ground.
AV
DD
Analog +3.3V supply.
DV
DD
Digital +3.3V supply.
N/C
No Connect
IO
N
1
2
3
4
5
6
7
8
D2
D1
D0
CLK
AGND
DGND
DGND
DV
DD
24
23
22
21
20
19
18
17
D8
DGND
DGND
AV
DD
I
SET
AGND
PWD
D9
9
1
1
1
1
1
1
1
A
D
A
A
A
N
A
D
I
N
I
P
3
3
3
2
2
2
2
2
D
D
D
D
D
D
D
D
D
D
SPT5240SIT
32-pin LQFP
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參數(shù)描述 |
|---|---|
| SPT5240SIT | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10BIT 400MWPS 3V DaC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| SPT5240SIT_Q | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10BIT 400MWPS 3V DaC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| SPT5303 | 制造商:SSDI 制造商全稱:Solid States Devices, Inc 功能描述:200 WATT NPN SILICON POWER TRANSISTOR |
| SPT5310 | 制造商:CADEKA 制造商全稱:CADEKA 功能描述:12-BIT, 250 MWPS ECL D/A CONVERTER |
| SPT5310SIN | 制造商:CADEKA 制造商全稱:CADEKA 功能描述:12-BIT, 250 MWPS ECL D/A CONVERTER |
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