BurrĆBrown Products from Texas Instruments
FEATURES
APPLICATIONS
DESCRIPTION
ADS7884ADS7885
SLAS567–MARCH 2008
10-/8-BIT,3-MSPS,MICRO-POWER,MINIATURE SAR ANALOG-TO-DIGITAL CONVERTERS
•Ba Band Converters in Radio •3-MHz Sample Rate Serial Device Communication
•10-Bit Resolution –ADS7884•Motor Current/Bus Voltage Sensors in Digital •8-Bit Resolution –ADS7885Drives
•Zero Latency
•Optical Networking (DWDM,MEMS Bad •48-MHz Serial Interface
Switching)
•Supply Range:2.7V to 5.5V •Optical Sensors
•Battery Powered Systems •
Low Power Dissipation:
•Medical Instrumentations
– 6.8mW at 3-V V DD ,2.5MSPS •High-Speed Data Acquisition Systems –15mw at 5-V V DD ,3MSPS
•
High-Speed Clod-Loop Systems
•±0.3LSB INL,±0.3LSB DNL –ADS7884•±0.15LSB INL,±0.1LSB DNL –ADS7885•61.7dB SINAD,–81dB THD –ADS7884•49.8dB SINAD,–68dB THD –ADS7885•Unipolar Input Range:0V to V DD •Powerdown Current:1µA
•Wide Input Bandwidth:30MHz at 3dB •
6-Pin SOT23Package
The ADS7884is a 10-bit,3-MSPS analog-to-digital converter (ADC),and the ADS7885is a 8-bit,3-MSPS ADC.The devices include a capacitor bad SAR A/D converter with inherent sample and hold.The rial interface in each device is controlled by the CS and SCLK signals for glueless connections with microprocessors and DSPs.The input signal is sampled with the falling edge of CS,and SCLK is ud for conversion and rial data output.The devices operate from a wide supply range from 2.7V to 5.5V.The low power consumption of the devices make them suitable for battery-powered applications.The devices also include a power saving powerdown feature for when the devices are operated at lower conversion speeds.
The high level of the digital input to the device is not limited to device V DD .This means the digital input can go as high as 5.5V when device supply is 2.7V.This feature is uful when digital signals ar
e coming from other circuit with different supply levels.Also this relaxes restriction on power up quencing.
The ADS7884and ADS7885are available in a 6-pin SOT23package and are specified for operation from –40°C to 125°C.
Micro-Power Miniature SAR Converter Family
BIT <300KSPS
300KSPS –1.25MSPS
3MSPS
12-Bit ADS7866(1.2V DD to 3.6V DD )ADS7886(2.35V DD to 5.25V DD )—
10-Bit ADS7867(1.2V DD to 3.6V DD )ADS7887(2.35V DD to 5.25V DD )ADS7884(2.7V DD to 5.5V DD )8-Bit
ADS7868(1.2V DD to 3.6V DD )
ADS7888(2.35V DD to 5.25V DD )
ADS7885(2.7V DD to 5.5V DD )
Plea be aware that an important notice concerning availability,standard warranty,and u in critical applications of Texas Instruments miconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.Copyright ©2008,Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas Instruments standard warranty.Production processing does not necessarily include testing of all parameters.
+IN
ABSOLUTE MAXIMUM RATINGS(1)
ADS7884
ADS7885
SLAS567–MARCH2008
The devices have limited built-in ESD protection.The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
PACKAGE/ORDERING INFORMATION
MAXIMUM MAXIMUM NO MISSING
PACKAGE TRANSPORT INTEGRAL DIFFERENTIAL CODES AT PACKAGE TEMPERATURE PACKAGE ORDERING DEVICE DESIGNAT MEDIA LINEARITY LINEARITY RESOLUTION TYPE RANGE MARKING INFORMATION
OR QUANTITY (LSB)(LSB)(BIT)
Tape and
7884ADS7884SDBVT
reel250
6-Pin
ADS7884±0.8±0.810DBV–40°C to125°C
SOT23Tape and
7884ADS7884SDBVR
reel3000
Tape and
7885ADS7885SDBVT
reel250
6-Pin
ADS7885±0.4±0.48DBV–40°C to125°C
SOT23Tape and
7885ADS7885SDBVR
reel3000 (1)For most current package and ordering information,e the Package Option Addendum at the end of this document,or e the TI
website at
UNIT
+IN to AGND–0.3V to+V DD+0.3V
+V DD to AGND–0.3V to7.0V
Digital input voltage to GND–0.3V to(7.0V)
Digital output to GND–0.3V to(+V DD+0.3V) Operating temperature range–40°C to125°C
Storage temperature range–65°C to150°C
Junction temperature(T J Max)150°C
Power dissipation,SOT23package(T J Max–T A)/θJA
Thermal impedance,θJA SOT23295.2°C/W
Vapor pha(60c)215°C
Lead temperature,soldering
Infrared(15c)220°C
(1)Stress above tho listed under absolute maximum ratings may cau permanent damage to the device.Exposure to absolute
maximum conditions for extended periods may affect device reliability.
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ADS7884SPECIFICATIONS
ADS7884
ADS7885 SLAS567–MARCH2008
+V DD=2.7V to5.5V,T A=–40°C to125°C,f sample=2.5MSPS for V DD=2.7V to3.6V,f sample=3MSPS for V DD=3.6V to 5.5V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT
Full-scale input voltage span(1)0V DD V
Absolute input voltage range+IN–0.20V DD+0.20V发酵制品
C i Input capacitance(2)27pF
I Ilkg Input leakage current T A=125°C40nA SYSTEM PERFORMANCE
Resolution10Bits
No missing codes10Bits INL Integral nonlinearity–0.8±0.30.8LSB(3) DNL Differential nonlinearity–0.8±0.30.8LSB
E O Offt error(4)(5)(6)–1±0.21LSB
E G Gain error(5)–1±0.21LSB SAMPLING DYNAMICS
Conversion time48-MHz SCLK,V DD=5V224240ns
Acquisition time93.3ns
Maximum throughput rate48-MHz SCLK,V DD=5V3MHz
Aperture delay10ns DYNAMIC CHARACTERISTICS
THD Total harmonic distortion(7)100kHz–81dB SINAD Signal-to-noi and distortion100kHz6061.7dB SFDR Spurious free dynamic range100kHz81dB Full power bandwidth At–3dB30MHz DIGITAL INPUT/OUTPUT
Logic family—CMOS
手指纹V DD=2.7V to3.6V 1.5 5.5
V IH High-level input voltage V
V DD=3.6V to5.5V 2.2 5.5
V DD=5V0.8
V IL Low-level input voltage V
V DD=3V0.4
V OH High-level output voltage At I source=200µA V DD–0.2
V
V OL Low-level output voltage At I sink=200µA0.4
POWER SUPPLY REQUIREMENTS
+V DD Supply voltage 2.7 3.3 5.5V
At V DD=3.0V,2.5-MSPS throughput 2.253
At V DD=3.0V,static state 1.8 Supply current(normal mode)mA
At V DD=5.0V,3-MSPS throughput34
At V DD=5.0V,static state2
拱桥运动
SCLK off1 Power down state supply currentµA
SCLK on(48MHz)90200
V DD=5V,3MSPS1520 Power dissipation mW
V DD=3V,2.5MSPS 6.8
(1)Ideal input span;does not include gain or offt error.
(2)Refer to Figure43for details on sampling circuit
(3)LSB bit
(4)Measured relative to an ideal full-scale input
(5)Offt error and gain error ensured by characterization.
(6)First transition of000H to001H at(V ref/210)
(7)Calculated on the first nine harmonics of the input frequency
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ADS7884ADS7885
SLAS567–MARCH 2008
ADS7884SPECIFICATIONS (continued)
+V DD =2.7V to 5.5V,T A =–40°C to 125°C,f sample =2.5MSPS for V DD =2.7V to 3.6V,f sample =3MSPS for V DD =3.6V to 5.5V
PARAMETER
TEST CONDITIONS
MIN
TYP MAX
UNIT V DD =5V 10Power dissipation in static state mW V DD =3V
5.4
Powerdown time 0.1µs Powerup time
0.8µs
TEMPERATURE RANGE
Specified performance
–40
125
°C
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Product Folder Link(s):ADS7884ADS7885
ADS7885SPECIFICATIONS
ADS7884
ADS7885 SLAS567–MARCH2008
+V DD=2.7V to5.5V,T A=–40°C to125°C,f sample=2.5MSPS for V DD=2.7V to3.6V,f sample=3MSPS for V DD=3.6V to 5.5V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT
Full-scale input voltage span(1)0V DD V
Absolute input voltage range+IN–0.20V DD+0.20V
C i Input capacitance(2)27pF
两栖坦克
I Ilkg Input leakage current T A=125°C40nA SYSTEM PERFORMANCE
Resolution8Bits
No missing codes8Bits INL Integral nonlinearity–0.4±0.150.4LSB(3) DNL Differential nonlinearity–0.4±0.10.4LSB
E O Offt error(4)(5)(6)–0.4±0.10.4LSB
E G Gain error(5)–0.5±0.10.5LSB SAMPLING DYNAMICS
Conversion time48-MHz SCLK,V DD=5V182198ns
Acquisition time3MSPS mode135ns
Maximum throughput rate48-MHz SCLK,V DD=5V3MHz Aperture delay10ns DYNAMIC CHARACTERISTICS
THD Total harmonic distortion(7)100kHz–68dB SINAD Signal-to-noi and distortion100kHz4949.8dB SFDR Spurious free dynamic range100kHz74dB Full power bandwidth At–3dB30MHz DIGITAL INPUT/OUTPUT
Logic family—CMOS
V DD=2.7V to3.6V 1.5 5.5
V IH High-level input voltage V
V DD=3.6V to5.5V 2.2 5.5
V DD=5V0.8
V IL Low-level input voltage V
非手术除皱V DD=3V0.4春天的颜色作文
V OH High-level output voltage At I source=200µA V DD–0.2
V
V OL Low-level output voltage At I sink=200µA0.4
POWER SUPPLY REQUIREMENTS
+V DD Supply voltage 2.7 3.3 5.5V
At V DD=3.0V,2.5-MSPS throughput 2.253
At V DD=3.0V,static state 1.8 Supply current(normal mode)mA
At V DD=5.0V,3-MSPS throughput34
At V DD=5.0V,static state2
SCLK off1 Power down state supply currentµA
SCLK on(48MHz)90200
V DD=5V,3MSPS1520 Power dissipation mW
V DD=3V,2.5MSPS 6.8
(1)Ideal input span;does not include gain or offt error.
(2)Refer to Figure43for details on sampling circuit
一碧千里什么意思(3)LSB bit
(4)Measured relative to an ideal full-scale input
(5)Offt error and gain error ensured by characterization.
(6)First transition of000H to001H at(V ref/28)
(7)Calculated on the first nine harmonics of the input frequency
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TIMING REQUIREMENTS (e Figure 1
)
ADS7884ADS7885
SLAS567–MARCH 2008
ADS7885SPECIFICATIONS (continued)
+V DD =2.7V to 5.5V,T A =–40°C to 125°C,f sample =2.5MSPS for V DD =2.7V to 3.6V,f sample =3MSPS for V DD =3.6V to 5.5V
PARAMETER
TEST CONDITIONS
MIN
TYP MAX
UNIT V DD =5V 10Power dissipation in static state mW V DD =3V
5.4
Powerdown time 0.1µs Powerup time
0.8µs
TEMPERATURE RANGE
Specified performance
–40
藏族的传统节日125
°C
All specifications typical at T A =–40°C to 125°C,V DD =2.7V to 5.5V,unless otherwi specified.
(1)3-V Specifications apply from 2.7V to 3.6V,and 5-V specifications apply from 4.5V to 5.5V.(2)With 10-pf load.
6
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