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AD7457

Features: `Specified for VDD of 2.7 V to 5.25 V`Low power:0.9 mW max at 100 kSPS with VDD = 3 V3 mW max at 100 kSPS with VDD = 5 V`Pseudo differential analog input`Wide input bandwidth:70 dB SINAD at 30 kHz input frequency`Flexible power/serial clock speed management`No pipeline delays`High speed ...

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SeekIC No. : 004270216 Detail

AD7457: Features: `Specified for VDD of 2.7 V to 5.25 V`Low power:0.9 mW max at 100 kSPS with VDD = 3 V3 mW max at 100 kSPS with VDD = 5 V`Pseudo differential analog input`Wide input bandwidth:70 dB SINAD a...

AD7457 Data Sheet

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Part Number:
AD7457
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:

`Specified for VDD of 2.7 V to 5.25 V
`Low power:
0.9 mW max at 100 kSPS with VDD = 3 V
3 mW max at 100 kSPS with VDD = 5 V
`Pseudo differential analog input
`Wide input bandwidth:
70 dB SINAD at 30 kHz input frequency
`Flexible power/serial clock speed management
`No pipeline delays
`High speed serial interface-SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
`Automatic power-down mode
`8-lead SOT-23 package




Application

·Transducer interface
·Battery-powered systems
·Data acquisition systems
·Portable instrumentation




Pinout

Connection Diagram

AD7457 Diagram




Specifications

VDD to GND..............................−0.3 V to +7 V
VIN+ to GND.................−0.3 V to VDD + 0.3 V
VIN to GND................−0.3 V to VDD + 0.3 V
Digital Input Voltage to GND....−0.3 V to +7 V
Digital Output Voltage to GND...−0.3 V to VDD + 0.3 V
VREF to GND.............................−0.3 V to VDD + 0.3 V
Input Current to Any Pin Except Supplies1....±10 mA
Operating Temperature Range
Commercial (B Version)..............−40°C to +85°C
Storage Temperature Range.......−65°C to +150°C
Junction Temperature.....................................150°C
JA Thermal Impedance...........211.5°C/W (SOT-23)
JC Thermal Impedance..........91.99°C/W (SOT-23)
Lead Temperature, Soldering
Vapor Phase (60 sec)..................................215°C
Infrared (15 sec).........................................220°C
Pb-Free Temperature, Soldering
Reflow..................................................260(+0)°C

Resolution (Bits) 12bit
T-Put Rate 100kSPS
# Chan 1
Supply V Single(+3),Single(+3.3),Single(+5)
Pwr Diss 3mW
Interface Ser,SPI
Ain Range (Vref) p-p
SNR (dB) 71dB
Pkg Type SOT





Description

The AD7457 is a 12-bit, low power, successive approximation (SAR) analog-to-digital converter that features a pseudo differential analog input. This part operates from a single 2.7 V to 5.25 V power supply and features throughput rates of up to 100 kSPS.

The part contains a low noise, wide bandwidth, differential track-and-hold (T/H) amplifier that can handle input frequen-cies in excess of 1 MHz. The reference voltage for the AD7457 is applied externally to the VREF pin and can range from 100 mV to VDD, depending on what suits the application.

The conversion process and data acquisition are controlled usingCS and the serial clock, allowing the device to interface with microprocessors or DSPs. The SAR architecture of this part ensures that there are no pipeline delays.

The AD7457 uses advanced design techniques to achieve very low power dissipation.






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