參數資料
| 型號： | AD5781ARUZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/28頁 |
| 文件大小： | 0K |
| 描述： | IC DAC 18BIT SRL 20TSSOP |
| 產品變化通告： | AD57x1 Feature Change 27/Jul/2011 |
| 設計資源： | 18-Bit Accurate, low noise, precision bipolar DC voltage source (CN0177) |
| 標準包裝： | 1,000 |
| 設置時間： | 1µs |
| 位數： | 18 |
| 數據接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉換器數目： | 1 |
| 電壓電源： | 模擬和數字，雙 ± |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 20-TSSOP |
| 包裝： | 帶卷 (TR) |
| 輸出數目和類型： | * |
| 采樣率（每秒）： | 1M |
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True 18-Bit, Voltage Output DAC
±0.5 LSB INL, ±0.5 LSB DNL
Data Sheet
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
2010–2013 Analog Devices, Inc. All rights reserved.
FEATURES
Single 18-bit DAC, ±0.5 LSB INL
7.5 nV/√Hz noise spectral density
0.05 LSB long-term linearity stability
<0.05 ppm/°C temperature drift
1 s settling time
1.4 nV-sec glitch impulse
Operating temperature range: 40°C to +125°C
20-lead TSSOP package
Wide power supply range of up to ±16.5 V
35 MHz Schmitt triggered digital interface
1.8 V compatible digital interface
APPLICATIONS
Medical instrumentation
Test and measurement
Industrial control
Scientific and aerospace instrumentation
Data acquisition systems
Digital gain and offset adjustment
Power supply control
FUNCTIONAL BLOCK DIAGRAM
A1
6.8k
6k
6.8k
R1
RFB
18-BIT
DAC
REG
18
INPUT
SHIFT
REGISTER
AND
CONTROL
LOGIC
POWER-ON-RESET
AND CLEAR LOGIC
AD5781
IOVCC
SDIN
VCC
VDD
VREFPF VREFPS
VREFNF
AGND
VSS
DGND
VREFNS
SCLK
SYNC
SDO
LDAC
CLR
RESET
RFB
INV
VOUT
09092-
001
Figure 1.
Table 1. Complementary Devices
Part No.
Description
Ultraprecision, 36 V, 2.8 nV/√Hz rail-to-rail
output op amp
Ultraprecision, 36 V, 2.8 nV/√Hz dual rail-to-
rail output op amp
High voltage, low noise, low distortion, unity
gain stable, high speed op amp
Table 2. Related Devices
Part No.
Description
20-bit, 1 ppm accurate DAC
16-bit, 1 LSB accurate 5 V DAC
GENERAL DESCRIPTION
that operates from a bipolar supply of up to 33 V. The AD5781
accepts a positive reference input range of 5 V to VDD 2.5 V and
a negative reference input range of VSS + 2.5 V to 0 V. The
AD5781 offers a relative accuracy specification of ±0.5 LSB
maximum, and operation is guaranteed monotonic with a ±0.5
LSB DNL maximum specification.
The part uses a versatile 3-wire serial interface that operates at
clock rates of up to 35 MHz and is compatible with standard
SPI, QSPI, MICROWIRE, and DSP interface standards. The
part incorporates a power-on reset circuit that ensures that the
DAC output powers up to 0 V and in a known output impedance
state and remains in this state until a valid write to the device
takes place. The part provides an output clamp feature that
places the output in a defined load state.
PRODUCT HIGHLIGHTS
1. True 18-Bit Accuracy.
2. Wide Power Supply Range of Up to ±16.5 V.
3. 40°C to +125°C Operating Temperature Range.
4. Low 7.5 nV/√Hz Noise.
5. Low 0.05 ppm/°C Temperature Drift.
1
Protected by U.S. Patent No 7884747, and other patents are pending.
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