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MFG:ADI D/C:09
Part Number: AD7457
MFG: ADI
D/C: 09
Description: The AD7457 is a 12-bit, low power, successive approximation (SAR) analog-to-digital converter that fea...
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AD7457
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DataSheet
General Description
AD7457 General 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 using CS 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.
AD7457 Maximum Ratings
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
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
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 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
`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
AD7457 Typical Application
·Transducer interface
·Battery-powered systems
·Data acquisition systems
·Portable instrumentation
·Battery-powered systems
·Data acquisition systems
·Portable instrumentation
AD7457 Connection Diagram
AD7457
PDF/DataSheet Download
- Datasheet: AD7457
- File Size: 1321798 KB
- Manufacturer: AD
- Click here to Download
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