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AD7742

Features: AD7741: One Single-Ended Input ChannelAD7742: Two Differential or Three Pseudo-DifferentialInput ChannelsIntegral Nonlinearity of 0.012% at fOUT(Max) = 2.75 MHz(AD7742) and at fOUT(Max) = 1.35 MHz (AD7741)Single +5 V Supply OperationBuffered InputsProgrammable Gain Analog Front-EndOn-Chi...

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SeekIC No. : 004270788 Detail

AD7742: Features: AD7741: One Single-Ended Input ChannelAD7742: Two Differential or Three Pseudo-DifferentialInput ChannelsIntegral Nonlinearity of 0.012% at fOUT(Max) = 2.75 MHz(AD7742) and at fOUT(Max) = ...

AD7742 Data Sheet

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Part Number:
AD7742
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

AD7741: One Single-Ended Input Channel
AD7742: Two Differential or Three Pseudo-Differential
Input Channels
Integral Nonlinearity of 0.012% at fOUT(Max) = 2.75 MHz
(AD7742) and at fOUT(Max) = 1.35 MHz (AD7741)
Single +5 V Supply Operation
Buffered Inputs
Programmable Gain Analog Front-End
On-Chip +2.5 V Reference
Internal/External Reference Option
Power Down to 35 mA Max
Minimal External Components Required
8-Lead and 16-Lead DIP and SOIC Packages




Application

Low Cost Analog-to-Digital Conversion
Signal Isolation




Pinout

Connection Diagram

AD7742 Diagram




Specifications

VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.3V to +7 V
Analog Input Voltage to GND . . . . . . . . . . . . . . . . . 5 V to VDD + 0.3 V
Digital Input Voltage to GND . . . . . . . . . . . . . . . .. 0.3 V to VDD + 0.3 V
Reference Input Voltage to GND . . . . . . . . . . . . . 0.3 V to VDD + 0.3 V
fOUT to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to VDD + 0.3 V
Operating Temperature Range
Automotive (Y Version) . . . . . . . . . . . . . . . . . . . . . 40 °C to +105° C
Industrial (B Version) . . . . . . . . . . . . . . . . . . . . . . . . 40 °C to +85° C
Storage Temperature Range . . . . . . . . . . . . . . . . . 65 °C to +150° C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . ... ... ... . +150 °C
Plastic DIP Package
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . ... ... . . . . 450 mW
q JA Thermal Impedance (8 Lead) . . . . . . . . . . . . . . . ... . . . . 125 °C/W
q JA Thermal Impedance (16 Lead) . . . . . . . . . . . . . . . ... . . . 117 °C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . ..... . . . +215° C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .. . . +220 °C
SOIC Package
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .... . 450 mW
q JA Thermal Impedance (8 Lead) . . . . . . . . . . . . . . . . . ... .. . 157° C/W
q JA Thermal Impedance (16 Lead) . . . . . . . . . . . . . . . . ... . . 125° C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . ... .. .. +215 °C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .. . +220 °C

Architecture Synchronous
# Channels 2-Differential,3-Pseudo Differential
Input Voltage Range (V) +3.5V
Full Scale Fout (kHz) 3072kHz
Reference Voltage (V) 2.5V
Accuracy (%/kHz) 2
Input Clk Frequency (MHz) 6.144MHz
Voltage Supply (V) 4.75 to 5.25
Supply Current 8mA
Package 16-Lead PDIP,16-Lead SOIC





Description

The AD7741/AD7742 are a new generation of synchronous voltage-to-frequency converters (VFCs). The AD7741 is a single-channel version in an 8-lead package (SOIC/DIP) and the AD7742 is a multichannel version in a 16-lead package (SOIC/DIP). No user trimming is required to achieve the specified performance.

The AD7741 has a single buffered input whereas the AD7742 has four buffered inputs that may be configured as two fully-differential inputs or three pseudo-differential inputs. Both parts include an on-chip +2.5 V bandgap reference that provides the user with the option of using this internal reference or an exter-nal reference.

The AD7741 has a single-ended voltage input range from 0 V to REFIN. The AD7742 has a differential voltage input range from VREF to +VREF. Both parts operate from a single +5 V supply consuming typically 6 mA, and also contain a power-down feature that reduces the current consumption to less than 35 m A.






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