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Package Cooled:S&D
Part Number: AD7457BRT-R2
Package Cooled: S&D
Description: The AD7457 is a 12-bit, low power, successive approximation (SAR) analog-to-digital converter that fea...
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AD7457BRT-R2
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DataSheet
General Description
AD7457BRT-R2 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 amplifier (T/H) that can handle input frequencies 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.
AD7457BRT-R2 Maximum Ratings
| Parameters | Rating |
| 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 | ±10 mA |
| Supplies1 |
|
| 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 s) | 215°C |
| Infrared (15 s) | 220°C |
AD7457BRT-R2 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
AD7457BRT-R2 Typical Application
Transducer interface
Battery-powered systems
Data acquisition systems
Portable instrumentation
Battery-powered systems
Data acquisition systems
Portable instrumentation
AD7457BRT-R2 Connection Diagram
AD7457BRT-R2
PDF/DataSheet Download
- Datasheet: AD7457BRT-R2
- File Size: 429943 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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