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參數(shù)資料
| 型號： | AD5532-5 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 32-Channel, 14-Bit Voltage-Output DAC |
| 中文描述： | 32通道，14位電壓輸出DAC |
| 文件頁數(shù)： | 15/16頁 |
| 文件大小： | 244K |
| 代理商： | AD5532-5 |
REV. 0
AD5532
–15–
APPLICATION CIRCUITS
AD5532 in a Typical ATE System
The AD5532 is ideally suited for use in Automatic Test Equipment.
Several DACs are required to control pin drivers, comparators,
active loads and signal timing. Traditionally, sample-and-hold
devices were used in this application.
The AD5532 has several advantages: no refreshing is required,
there is no droop, pedestal error is eliminated and there is no
need for extra filtering to remove glitches. Overall a higher level
of integration is achieved in a smaller area (see Figure 24).
DACs
ACTIVE
LOAD
DRIVER
COMPARATOR
FORMATTER
COMPARE
REGISTER
STORED
DATA
AND INHIBIT
PATTERN
PERIOD
GENERATION
AND
DELAY
TIMING
SYSTEM BUS
DAC
PARAMETRIC
MEASUREMENT
UNIT
SYSTEM BUS
DUT
DAC
DAC
DAC
DAC
DAC
DAC
Figure 24. AD5532 in an ATE System
Typical Application Circuit (SHA Mode)
The AD5532 can be used to set up voltage levels on 32 channels
as shown in the circuit below. An AD780 provides the 3 V refer-
ence for the AD5532, and for the AD5541 16-bit DAC. A simple
3-wire interface is used to write to the AD5541. The DAC output
is buffered by an AD820. It is essential to minimize noise on V
IN
and REFIN when laying out this circuit.
AD5532*
OFFS_IN
OFFS_OUT
REFIN
V
IN
SCLK
DIN
SYNC
AV
CC
DV
CC
V
SS
V
DD
V
OUT
0
–
31
AD820
CS
DIN
SCLK
*ADDITIONAL PINS OMITTED FOR CLARITY
AD780*
V
OUT
AD5541*
REF
AV
CC
Figure 25. Typical Application Circuit
POWER SUPPLY DECOUPLING
In any circuit where accuracy is important, careful consideration
of the power supply and ground return layout helps to ensure
the rated performance. The printed circuit board on which the
AD5532 is mounted should be designed so that the analog and
digital sections are separated, and confined to certain areas of
the board. If the AD5532 is in a system where multiple devices
require an AGND-to-DGND connection, the connection should
be made at one point only. The star ground point should be
established as close as possible to the device. For supplies with
multiple pins (V
SS
, V
DD
, AV
CC
) it is recommended to tie those pins
together. The AD5532 should have ample supply bypassing of
10
μ
F in parallel with 0.1
μ
F on each supply located as close to
the package as possible, ideally right up against the device. The
10
μ
F capacitors are the tantalum bead type. The 0.1
μ
F capacitor
should have low Effective Series Resistance (ESR) and Effective
Series Inductance (ESI), like the common ceramic types that
provide a low impedance path to ground at high frequencies, to
handle transient currents due to internal logic switching.
The power supply lines of the AD5532 should use as large a trace
as possible to provide low impedance paths and reduce the
effects of glitches on the power supply line. Fast switching signals
such as clocks should be shielded with digital ground to avoid
radiating noise to other parts of the board, and should never be
run near the reference inputs. A ground line routed between
the D
IN
and SCLK lines will help reduce crosstalk between them
(not required on a multilayer board as there will be a separate
ground plane, but separating the lines will help). It is essential
to minimize noise on V
IN
and REFIN lines.
Avoid crossover of digital and analog signals. Traces on opposite
sides of the board should run at right angles to each other. This
reduces the effects of feedthrough through the board. A microstrip
technique is by far the best, but not always possible with a double-
sided board. In this technique, the component side of the board
is dedicated to ground plane while signal traces are placed on
the solder side.
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| AD5532ABC-1 | 功能描述:IC DAC 14BIT 32CH 74-CSPBGA RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 設(shè)置時間:1µs 位數(shù):8 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
| AD5532ABC-2 | 功能描述:IC DAC 14BIT 32CH 74-CSPBGA RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 設(shè)置時間:1µs 位數(shù):8 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
| AD5532ABC-3 | 功能描述:IC DAC 14BIT 32CH 74-CSPBGA RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 設(shè)置時間:1µs 位數(shù):8 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
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