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MFG:ADI D/C:09
Part Number: AD7898
MFG: ADI
D/C: 09
Description: The AD7898 is a fast 12-bit ADC that operates from a single 5 V supply and is housed in a small 8-lead SOIC package. Th...
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AD7898
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DataSheet
General Description
AD7898 General Description
The AD7898 is a fast 12-bit ADC that operates from a single 5 V supply and is housed in a small 8-lead SOIC package. The part contains a successive approximation A/D converter, an onchip track/hold amplifier, an on-chip clock, and a high-speed serial interface.
The AD7898 offers two modes of operation. In Mode 0, conversion is initiated by the CONVST input and the conversion process is controlled by an internal clock oscillator. In this mode, the serial interface consists of three wires and the AD7898 is capable of throughput rates up to 220 kSPS. In Mode 1, the conversion process is controlled by an externally-applied SCLK with data being accessed from the part during conversion. In this mode, the serial interface consists of three wires and the AD7898 is capable of throughput rates up to 220 kSPS.
In addition to the traditional dc accuracy specifications such as linearity and full-scale and offset errors, the AD7898 is specified for dynamic performance parameters, including harmonic distortion and signal-to-noise ratio.
The part accepts an analog input range of ±10 V (AD7898-10) and ±2.5 V (AD7898-3), and operates from a single 5 V supply, consuming only 22.5 mW max.
The part is available in an 8-lead small outline IC (SOIC).
AD7898 Maximum Ratings
(TA = 25°C unless otherwise noted)
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to +7 V
Analog Input Voltage to GND
AD7898-10 . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . ±17 V
AD7898-3 . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . ±10 V
Reference Input Voltage to GND . . . .. .0.3 V to VDD + 0.3 V
Digital Input Voltage to GND . . . . . . . ..0.3 V to VDD + 0.3 V
Digital Output Voltage to GND . . . . . ...0.3 V to VDD + 0.3 V
Operating Temperature Range
Commercial (A, B Versions) . . . . . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . .. 65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . .. . . . 150°C
SOIC Package, Power Dissipation . . . . . . . . . . . .. . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . .. 170°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . .. . 220°C
ESD
AD7898-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .....2.5 kV
AD7898-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......4 kV
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to +7 V
Analog Input Voltage to GND
AD7898-10 . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . ±17 V
AD7898-3 . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . ±10 V
Reference Input Voltage to GND . . . .. .0.3 V to VDD + 0.3 V
Digital Input Voltage to GND . . . . . . . ..0.3 V to VDD + 0.3 V
Digital Output Voltage to GND . . . . . ...0.3 V to VDD + 0.3 V
Operating Temperature Range
Commercial (A, B Versions) . . . . . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . .. 65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . .. . . . 150°C
SOIC Package, Power Dissipation . . . . . . . . . . . .. . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . .. 170°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . .. . 220°C
ESD
AD7898-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .....2.5 kV
AD7898-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......4 kV
AD7898 Features
Fast 12-Bit ADC with 220 kSPS Throughput Rate
8-Lead SOIC
Single 5 V Supply Operation
High-Speed, Flexible, Serial Interface that Also
Allows Interfacing to 3 V Processors
On-Chip Track/Hold Amplifier
Selection of Input Ranges
±10 V for AD7898-10
±2.5 V for AD7898-3
High Input Impedance
Low Power: 22.5 mW Max
8-Lead SOIC
Single 5 V Supply Operation
High-Speed, Flexible, Serial Interface that Also
Allows Interfacing to 3 V Processors
On-Chip Track/Hold Amplifier
Selection of Input Ranges
±10 V for AD7898-10
±2.5 V for AD7898-3
High Input Impedance
Low Power: 22.5 mW Max
AD7898 Connection Diagram
AD7898
PDF/DataSheet Download
- Datasheet: AD7898
- File Size: 189332 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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