Datasheet.kr   

AD7945 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 AD7945은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 AD7945 자료 제공

부품번호 AD7945 기능
기능 +3.3 V/+5 V Multiplying 12-Bit DACs
제조업체 Analog Devices
로고 Analog Devices 로고


AD7945 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 16 페이지수

미리보기를 사용할 수 없습니다

AD7945 데이터시트, 핀배열, 회로
a
FEATURES
12-Bit Multiplying DACs
Guaranteed Specifications with +3.3 V/+5 V Supply
0.5 LSBs INL and DNL
Low Power: 5 W typ
Fast Interface
40 ns Strobe Pulsewidth (AD7943)
40 ns Write Pulsewidth (AD7945, AD7948)
Low Glitch: 60 nV-s with Amplifier Connected
Fast Settling: 600 ns to 0.01% with AD843
APPLICATIONS
Battery-Powered Instrumentation
Laptop Computers
Upgrades for All 754x Series DACs (5 V Designs)
GENERAL DESCRIPTION
The AD7943, AD7945 and AD7948 are fast 12-bit multiplying
DACs that operate from a single +5 V supply (Normal Mode)
and a single +3.3 V to +5 V supply (Biased Mode). The
AD7943 has a serial interface, the AD7945 has a 12-bit parallel
interface, and the AD7948 has an 8-bit byte interface. They will
replace the industry-standard AD7543, AD7545 and AD7548
in many applications, and they offer superior speed and power
consumption performance.
The AD7943 is available in 16-lead DIP, 16-lead SOP (Small
Outline Package) and 20-lead SSOP (Shrink Small Outline
Package).
The AD7945 is available in 20-lead DIP, 20-lead SOP and 20-
lead SSOP.
The AD7948 is available in 20-lead DIP, 20-lead SOP and 20-
lead SSOP.
+3.3 V/+5 V Multiplying
12-Bit DACs
AD7943/AD7945/AD7948
FUNCTIONAL BLOCK DIAGRAMS
VREF
AD7943
VDD
CLR
LD1
LD2
RFB
12-BIT DAC
DAC REGISTER
IOUT1
IOUT2
AGND
SRI
INPUT SHIFT REGISTER
SRO
VREF
CS
WR
STB1 STB2 STB3 STB4 DGND
VDD
RFB
AD7945
12-BIT DAC
12
IOUT1
AGND
INPUT LATCH
12
DB11–DB0
DGND
VDD
RFB
VREF
12-BIT DAC
12
DATA OVERRIDE LOGIC
12
DAC REGISTER
12
INPUT REGISTERS
12
DATA STEERING LOGIC
8
DB7–DB0
AD7948
CONTROL
LOGIC
IOUT1
AGND
DF/DOR
CTRL
LDAC
WR
CSLSB
CSMSB
DGND
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998




AD7945 pdf, 반도체, 판매, 대치품
AD7943/AD7945/AD7948
AC PERFORMANCE CHARACTERISTICS
NORMAL MODE (AD7943: VDD = +4.5 V to +5.5 V; VIOUT1 = VIOUT2 = AGND = 0 V. AD7945, AD7948: VDD = +4.5 V to +5.5 V; VIOUT1 =AGND =
0 V. VREF = 6 V rms, 1 kHz sine wave; TA = TMIN to TMAX; DAC output op amp is AD843; unless otherwise noted.) These characteristics are in-
cluded for Design Guidance and are not subject to test.
Parameter
DYNAMIC PERFORMANCE
Output Voltage Settling Time
B Grades
600
Digital to Analog Glitch Impulse
Multiplying Feedthrough Error
Output Capacitance
Digital Feedthrough (AD7943)
60
–75
60
30
5
Digital Feedthrough (AD7945, AD7948) 5
Total Harmonic Distortion
Output Noise Spectral Density
@ 1 kHz
Specifications subject to change without notice.
–83
35
T Grade
700
60
–75
60
30
5
5
–83
35
Units
Test Conditions/Comments
ns typ
nV-s typ
dB max
pF max
pF max
nV-s typ
nV-s typ
dB typ
To 0.01% of Full-Scale Range. VREF =
+10 V; DAC Latch Alternately Loaded with
All 0s and All 1s
Measured with VREF = 0 V. DAC Latch
Alternately Loaded with All 0s and All 1s
DAC Latch Loaded with All 0s
All 1s Loaded to DAC
All 0s Loaded to DAC
Feedthrough to the DAC Output with LD1,
LD2 High and Alternate Loading of All 0s
and All 1s into the Input Shift Register
Feedthrough to the DAC Output with CS
High and Alternate Loading of All 0s and
All 1s to the DAC Bus
nV/Hz typ All 1s Loaded to DAC. VREF = 0 V. Output
Op Amp Is OP07
AC PERFORMANCE CHARACTERISTICS
BIASED MODE (AD7943: VDD = +3 V to +5.5 V; VIOUT1 = VIOUT2 = AGND = 1.23 V. AD7945, AD7948: VDD = +3 V to +5.5 V; VIOUT1 = AGND =
1.23 V. VREF = 1 kHz, 2.45 V p-p, sine wave biased at 1.23 V; DAC output op amp is AD820; TA = TMIN to TMAX; unless otherwise noted.) These
characteristics are included for Design Guidance and are not subject to test.
Parameter
A Grades Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
Output Voltage Settling Time
Digital to Analog Glitch Impulse
Multiplying Feedthrough Error
Output Capacitance
Digital Feedthrough
5
60
–75
60
30
5
Digital Feedthrough (AD7945, AD7948) 5
Total Harmonic Distortion
Output Noise Spectral Density
@ 1 kHz
Specifications subject to change without notice.
–83
25
µs typ
nV-s typ
dB max
pF max
pF max
nV-s typ
nV-s typ
dB typ
nV/Hz typ
To 0.01% of Full-Scale Range. VREF = 0 V
DAC Latch Alternately Loaded with All 0s and All 1s
VREF = 1.23 V. DAC Register Alternately Loaded
with All 0s and All 1s
DAC Latch Loaded with All 0s
All 1s Loaded to DAC
All 0s Loaded to DAC
Feedthrough to the DAC Output with LD1, LD2
High and Alternate Loading of All 0s and All 1s
into the Input Shift Register
Feedthrough to the DAC Output with CS High
and Alternate Loading of All 0s and All 1s to the
DAC Bus
All 1s Loaded to DAC. VREF = 1.23 V
–4– REV. B

4페이지










AD7945 전자부품, 판매, 대치품
AD7943/AD7945/AD7948
ABSOLUTE MAXIMUM RATINGS1
(TA = +25°C unless otherwise noted)
VDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to +6 V
IOUT1 to DGND . . . . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
IOUT2 to DGND . . . . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
AGND to DGND . . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
Digital Input Voltage to DGND . . . . . . –0.3 V to VDD + 0.3 V
VRFB, VREF to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . ± 15 V
Input Current to Any Pin Except Supplies2 . . . . . . . . ± 10 mA
Operating Temperature Range
Industrial (A, B Versions) . . . . . . . . . . . . . –40°C to +85°C
Extended (T Version) . . . . . . . . . . . . . . . –55°C to +125°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
DIP Package, Power Dissipation . . . . . . . . . . . . . . . . 670 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 116°C/W
Lead Temperature, Soldering, (10 sec) . . . . . . . . . . +260°C
SOP Package, Power Dissipation . . . . . . . . . . . . . . . . . 450 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 75°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
SSOP Package, Power Dissipation . . . . . . . . . . . . . . . . 875 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 132°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
NOTES
1Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2Transient currents of up to 100 mA will not cause SCR latch-up.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD7943/AD7945/AD7948 feature proprietary ESD protection circuitry, perma-
nent damage may occur on devices subjected to high energy electrostatic discharges. Therefore,
proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
ORDERING GUIDE
Model
Temperature
Range
Linearity
Error (LSBs)
Nominal
Supply Voltage
AD7943BN
AD7943BR
AD7943BRS
AD7943AN-B
AD7943ARS-B
AD7945BN
AD7945BR
AD7945BRS
AD7945AN-B
AD7945ARS-B
AD7945TQ
AD7948BN
AD7948BR
AD7948BRS
AD7948AN-B
AD7948ARS-B
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–55°C to +125°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
± 0.5
± 0.5
± 0.5
±1
±1
± 0.5
± 0.5
± 0.5
±1
±1
±1
± 0.5
± 0.5
± 0.5
±1
±1
+5 V
+5 V
+5 V
+3.3 V to +5 V
+3.3 V to +5 V
+5 V
+5 V
+5 V
+3.3 V to +5 V
+3.3 V to +5 V
+5 V
+5 V
+5 V
+5 V
+3.3 V to +5 V
+3.3 V to +5 V
NOTE
1N = Plastic DIP; R = SOP (Small Outline Package); RS = SSOP (Shrink Small Outline Package); Q = Cerdip.
Package
Option1
N-16
R-16
RS-20
N-16
RS-20
N-20
R-20
RS-20
N-20
RS-20
Q-20
N-20
R-20
RS-20
N-20
RS-20
REV. B
–7–

7페이지


구       성 총 16 페이지수
다운로드[ AD7945.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
AD7940

14-Bit ADC

Analog Devices
Analog Devices
AD7942

PulSAR ADC

Analog Devices
Analog Devices

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵