Datasheet.kr   

AD7870 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 AD7870은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 AD7870 자료 제공

부품번호 AD7870 기능
기능 LC2MOS Complete/ 12-Bit/ 100 kHz/ Sampling ADCs
제조업체 Analog Devices
로고 Analog Devices 로고


AD7870 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 28 페이지수

미리보기를 사용할 수 없습니다

AD7870 데이터시트, 핀배열, 회로
FEATURES
Complete monolithic 12-bit ADCs with
2 μs track-and-hold amplifier
8 μs ADC
On-chip reference
Laser-trimmed clock
Parallel, byte, and serial digital interface
72 dB SNR at 10 kHz input frequency
(AD7870, AD7875)
57 ns data access time
Low power: −60 mW typical
Variety of input ranges
±3 V for AD7870
0 V to +5 V for AD7875
±10 V for AD7876
GENERAL DESCRIPTION
The AD7870/AD7875/AD7876 are fast, complete, 12-bit
analog-to-digital converters (ADCs). These converters consist
of a track-and-hold amplifier, an 8 μs successive approximation
ADC, a 3 V buried Zener reference, and versatile interface logic.
The ADCs feature a self-contained internal clock which is laser
trimmed to guarantee accurate control of conversion time. No
external clock timing components are required; the on-chip
clock may be overridden by an external clock if required.
The parts offer a choice of three data output formats: a single,
parallel, 12-bit word; two 8-bit bytes or serial data. Fast bus
access times and standard control inputs ensure easy interfacing
to modern microprocessors and digital signal processors.
All parts operate from ±5 V power supplies. The AD7870 and
AD7876 accept input signal ranges of ±3 V and ±10 V, respec-
tively, while the AD7875 accepts a unipolar 0 V to +5 V input
range. The parts can convert full power signals up to 50 kHz.
The AD7870/AD7875/AD7876 feature dc accuracy specifica-
tions, such as linearity, full-scale and offset error. In addition,
the AD7870 and AD7875 are fully specified for dynamic
performance parameters including distortion and signal-to-
noise ratio.
LC2MOS Complete,
12-Bit, 100 kHz, Sampling ADCs
AD7870/AD7875/AD7876
FUNCTIONAL BLOCK DIAGRAM
AGND
REF OUT
VIN
VDD
AD7870/AD7875/
INPUT
AD7876
SCALING
TRACK-AND-HOLD
3V
REFERENCE
12-BIT
DAC
COMP
CLK
12/8/CLK
CONVST
CLOCK
CONTROL LOGIC
PARALLEL
AND SERIAL
INTERFACE
SAR +
COUNTER
CS RD BUSY/INT DB11 DB0
Figure 1.
DGND VSS
The parts are available in a 24-pin, 0.3 inch-wide, plastic or
hermetic dual-in-line package (DIP). The AD7870 and AD7875
are available in a 28-pin plastic leaded chip carrier (PLCC),
while the AD7876 is available and in a 24-pin small outline
(SOIC) package.
PRODUCT HIGHLIGHTS
1. Complete 12-bit ADC on a chip.
The AD7870/AD7875/AD7876 provide all the functions
necessary for analog-to-digital conversion and combine a
12-bit ADC with internal clock, track-and-hold amplifier
and reference on a single chip.
2. Dynamic specifications for DSP users.
The AD7870 and AD7875 are fully specified and tested for
ac parameters, including signal-to-noise ratio, harmonic
distortion and intermodulation distortion.
3. Fast microprocessor interface.
Data access times of 57 ns make the parts compatible with
modern 8-bit and 16-bit microprocessors and digital signal
processors. Key digital timing parameters are tested and
guaranteed over the full operating temperature range.
Rev. C
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 that may result from its use. Specifications subject to change without notice. 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
www.analog.com
Fax: 781.461.3113 ©1997–2009 Analog Devices, Inc. All rights reserved.




AD7870 pdf, 반도체, 판매, 대치품
AD7870/AD7875/AD7876
Parameter
CONVERSION TIME
External Clock (fCLK = 2.5 MHz)
Internal Clock6
POWER REQUIREMENTS
VDD
VSS
IDD
ISS
Power Dissipation
ADN78701
J, A K, B L, C T
Units
Test Conditions/Comments
8 8 8 8 μs max
6.5/9 6.5/9 6.5/9 6.5/9 μs min/
μs max
+5 +5 +5 +5 V nom
±5% for specified performance
−5 −5 −5 −5 V nom
±5% for specified performance
13 13 13 13 mA max Typically 8 mA
6 6 6 6 mA max Typically 4 mA
95 95 95 95 mW max Typically 60 mW
1 The temperature range for the J, K, and L versions is from 0°C to +70°C; for the A, B, and C versions is−40°C to +85°C; and for the T version is −55°C to +125°C.
2 VIN (p-p) = ±3 V.
3 SNR calculation includes distortion and noise components.
4 Measured with respect to internal reference and includes bipolar offset error.
5 Sample tested @ +25°C to ensure compliance.
6 Conversion time specification for the AD7870A device with internal clock used is 8 μs/10 μs minimum/maximum.
AD7875/AD7876 SPECIFICATIONS
Table 2.
Parameter
DC ACCURACY
Resolution
Min Resolution for which No Missing
Codes Are Guaranteed
Integral Nonlinearity @ +25°C
TMIN to TMAX (AD7875 Only)
TMIN to TMAX (AD7876 Only)
Differential Nonlinearity
Unipolar Offset Error (AD7875 Only)
Bipolar Zero Error (AD7876 Only)
Full-Scale Error at +25°C2
Full-Scale TC2
Track-and-Hold Acquisition Time
DYNAMIC PERFORMANCE3 (AD7875
ONLY)
Signal-to-Noise Ratio4 (SNR)
@ +25°C
TMIN to TMAX
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Second Order Terms
Third Order Terms
AD7875/AD78761
K, B L, C T
Units
12 12 12
12 12 12
Bits
Bits
±1 ±1/2 ±1
LSB max
±1 ±1 ±1
LSB max
±1 ±1/2 ±1
LSB max
±1 ±1 ±1.5/−1.0 LSB max
±5 ±5 ±5
LSB max
±6 ±2 ±6
LSB max
±8 ±8 ±8
LSB max
±60 ±35 ±60
ppm/°C max
222
μs max
70 72 69
70 71 69
−80 −80 −78
−80 −80 −78
−80 −80 −78
−80 −80 −78
dB min
dB min
dB max
dB max
dB max
dB max
Test Conditions/Comments
Typical full-scale error is ±1 LSB
Typical TC is ±20 ppm/°C
VIN = 10 kHz sine wave, fSAMPLE = 100 kHz
Typically 71.5 dB for 0 < VIN < 50 kHz
VIN = 10 kHz sine wave, fSAMPLE = 100 kHz
Typically −86 dB for 0 < VIN < 50 kHz
VIN = 10 kHz, fSAMPLE = 100 kHz
Typically −86 dB for 0 < VIN < 50 kHz
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
Rev. C | Page 4 of 28

4페이지










AD7870 전자부품, 판매, 대치품
ABSOLUTE MAXIMUM RATINGS
Table 4.
Parameter
VDD to AGND
VSS to AGND
AGND to DGND
VIN to AGND
REF OUT to AGND
Digital Inputs to DGND
Digital Outputs to DGND
Operating Temperature Range
Commercial (J, K, L Versions–AD7870)
Commercial (K, L Versions–AD7875)
Industrial (A, B, C Versions–AD7870)
Industrial (B, C Versions–AD7875/
AD7876)
Extended (T Version)
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
Power Dissipation (Any Package) to +75°C
Derates above +75°C by
Rating
−0.3 V to +7 V
+0.3 V to −7 V
−0.3 V to VDD +0.3 V
−15 V to +15 V
0 V to VDD
−0.3 V to VDD +0.3 V
−0.3 V to VDD +0.3 V
0°C to +70°C
0°C to +70°C
−25°C to +85°C
−40°C to +85°C
−55°C to +125°C
−65°C to +150°C
+300°C
450 mW
10 mW/°C
AD7870/AD7875/AD7876
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Rev. C | Page 7 of 28

7페이지


구       성 총 28 페이지수
다운로드[ AD7870.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
AD7870

LC2MOS Complete/ 12-Bit/ 100 kHz/ Sampling ADCs

Analog Devices
Analog Devices
AD7870A

LC2MOS Complete/ 12-Bit/ 100 kHz / Sampling ADC

Analog Devices
Analog Devices

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