AD7451ART-R2

AD7451ART-R2 Datasheet

AD7441/AD7451

Part	Datasheet
AD7451ART-R2	AD7451ART-R2 (pdf)

Related Parts	Information
AD7451BRT-R2	AD7451BRT-R2
AD7441BRT-R2	AD7441BRT-R2

PDF Datasheet Preview
Pseudo Differential, 1 MSPS, 10- and 12-Bit ADCs in an 8-Lead SOT-23 AD7441/AD7451 FEATURES Fast Throughput Rate 1 MSPS Specified for VDD of V to V Low Power at Max Throughput Rate: 4 mW Max at 1 MSPS with VDD = 3 V mW Max at 1 MSPS with VDD = 5 V Pseudo Differential Analog Input Wide Input Bandwidth 70 dB SINAD at 100 kHz Input Frequency Flexible Power/Serial Clock Speed Management No Pipeline Delays High Speed Serial MICROWIRE /DSP Compatible Power-Down Mode 1 Max 8-Lead SOT-23 and MSOP Packages APPLICATIONS Transducer Interface Battery-Powered Systems Data Acquisition Systems Portable Instrumentation Motor Control Communications FUNCTIONAL BLOCK DIAGRAM VIN+ VREF 12-BIT SUCCESSIVE APPROXIMATION AD7441/AD7451 CONTROL LOGIC SCLK SDATA CS GENERAL DESCRIPTION The AD7441/AD7451 are, respectively, 10-bit and 12-bit, high speed, low power, successive approximation SAR analog-todigital converters that feature a pseudo differential analog input. These parts operate from a single V to V power supply and feature throughput rates up to 1 MSPS. The parts contain 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 AD7441/ AD7451 is applied externally to the VREF pin and can range from 100 mV to V, depending on the power supply and 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 input signals are sampled on the falling edge of CS the conversion is also initiated at this point. The SAR architecture of these parts ensures that there are no pipeline delays. The AD7441/AD7451 use advanced design techniques to achieve very low power dissipation at high throughput rates. PRODUCT HIGHLIGHTS Operation with V to V Power Supplies. High Throughput with Low Power Consumption. With a 3 V supply, the AD7441/AD7451 offer 4 mW max power consumption for a 1 MSPS throughput rate. Pseudo differential Analog Input. Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock, allowing the power to be reduced as the conversion time is reduced through the serial clock speed increase. These parts also feature a shutdown mode to maximize power efficiency at lower throughput rates. Variable Voltage Reference Input. No Pipeline Delay. Accurate control of the sampling instant via a CS input and once-off conversion control. ENOB > 10-bits Typically with 500 mV Reference. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel 781/329-4700 Fax 781/326-8703 2003 Analog Devices, Inc. All rights reserved. VDD = V to V, fSCLK = 18 MHz, fS = 1 MSPS, VREF = V, TA = TMIN to TMAX, unless otherwise noted. Parameter DYNAMIC PERFORMANCE Signal-to-Noise Ratio SNR 2 Signal to Noise + Distortion SINAD 2 Total Harmonic Distortion THD 2 Peak Harmonic or Spurious Noise2 Intermodulation Distortion IMD 2 Second Order Terms Third Order Terms Aperture Delay2 Aperture Jitter2 Full-Power Bandwidth2, 3 DC ACCURACY Resolution Integral Nonlinearity INL 2 Differential Nonlinearity DNL 2 Offset Error2 Gain Error2 ANALOG INPUT Full-Scale Input Span Absolute Input Voltage VIN+ DC Leakage Current Input Capacitance REFERENCE INPUT VREF Input Voltage DC Leakage Current VREF Input Capacitance LOGIC INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current, IIN Input Capacitance, CIN6 ORDERING GUIDE Model Temperature Range Linearity Error LSB 1 Package Description Package Option Branding AD7451ART-R2 to +85∞C AD7451ART-REEL7 to +85∞C AD7451ARM to +85∞C AD7451ARM-REEL7 to +85∞C AD7451BRT-R2 to +85∞C AD7451BRT-REEL7 to +85∞C AD7451BRM to +85∞C AD7451BRM-REEL7 to +85∞C AD7441BRT-R2 to +85∞C AD7441BRT-REEL7 to +85∞C AD7441BRM to +85∞C AD7441BRM-REEL7 EVAL-AD7451CB2 to +85∞C EVAL-AD7441CB2 EVAL-CONTROL BRD23 8-Lead SOT-23 RT-8 8-Lead SOT-23 RT-8 8-Lead MSOP RM-8 8-Lead MSOP RM-8

PDF Datasheet Preview

Pseudo Differential, 1 MSPS, 10- and 12-Bit ADCs in an 8-Lead SOT-23

AD7441/AD7451

FEATURES Fast Throughput Rate 1 MSPS Specified for VDD of V to V Low Power at Max Throughput Rate:
4 mW Max at 1 MSPS with VDD = 3 V mW Max at 1 MSPS with VDD = 5 V Pseudo Differential Analog Input Wide Input Bandwidth 70 dB SINAD at 100 kHz Input Frequency Flexible Power/Serial Clock Speed Management No Pipeline Delays High Speed Serial MICROWIRE /DSP Compatible Power-Down Mode 1 Max 8-Lead SOT-23 and MSOP Packages

APPLICATIONS Transducer Interface Battery-Powered Systems Data Acquisition Systems Portable Instrumentation Motor Control Communications

FUNCTIONAL BLOCK DIAGRAM

VIN+ VREF
12-BIT

SUCCESSIVE

APPROXIMATION

AD7441/AD7451 CONTROL LOGIC

SCLK SDATA CS

GENERAL DESCRIPTION The AD7441/AD7451 are, respectively, 10-bit and 12-bit, high speed, low power, successive approximation SAR analog-todigital converters that feature a pseudo differential analog input. These parts operate from a single V to V power supply and feature throughput rates up to 1 MSPS.

The parts contain 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 AD7441/ AD7451 is applied externally to the VREF pin and can range from 100 mV to V, depending on the power supply and 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 input signals are sampled on the falling edge of CS the conversion is also initiated at this point.

The SAR architecture of these parts ensures that there are no pipeline delays.

The AD7441/AD7451 use advanced design techniques to achieve very low power dissipation at high throughput rates.

PRODUCT HIGHLIGHTS Operation with V to V Power Supplies.

High Throughput with Low Power Consumption. With a 3 V supply, the AD7441/AD7451 offer 4 mW max power consumption for a 1 MSPS throughput rate.

Pseudo differential Analog Input.

Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock, allowing the power to be reduced as the conversion time is reduced through the serial clock speed increase. These parts also feature a shutdown mode to maximize power efficiency at lower throughput rates.

Variable Voltage Reference Input.

No Pipeline Delay. Accurate control of the sampling instant via a CS input and
once-off conversion control.

ENOB > 10-bits Typically with 500 mV Reference.

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel 781/329-4700

Fax 781/326-8703 2003 Analog Devices, Inc. All rights reserved.

VDD = V to V, fSCLK = 18 MHz, fS = 1 MSPS, VREF = V, TA = TMIN to TMAX, unless otherwise noted.

Parameter

DYNAMIC PERFORMANCE Signal-to-Noise Ratio SNR 2 Signal to Noise + Distortion SINAD 2

Total Harmonic Distortion THD 2

Peak Harmonic or Spurious Noise2

Intermodulation Distortion IMD 2 Second Order Terms Third Order Terms

Aperture Delay2 Aperture Jitter2 Full-Power Bandwidth2, 3

DC ACCURACY Resolution Integral Nonlinearity INL 2 Differential Nonlinearity DNL 2 Offset Error2 Gain Error2

ANALOG INPUT Full-Scale Input Span Absolute Input Voltage VIN+

DC Leakage Current Input Capacitance

REFERENCE INPUT VREF Input Voltage DC Leakage Current VREF Input Capacitance

LOGIC INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current, IIN Input Capacitance, CIN6
ORDERING GUIDE

Model

Temperature Range

Linearity Error LSB 1

Package Description

Package Option

Branding

AD7451ART-R2
to +85∞C

AD7451ART-REEL7
to +85∞C

AD7451ARM
to +85∞C

AD7451ARM-REEL7
to +85∞C

AD7451BRT-R2
to +85∞C

AD7451BRT-REEL7
to +85∞C

AD7451BRM
to +85∞C

AD7451BRM-REEL7
to +85∞C

AD7441BRT-R2
to +85∞C

AD7441BRT-REEL7
to +85∞C

AD7441BRM
to +85∞C

AD7441BRM-REEL7 EVAL-AD7451CB2
to +85∞C

EVAL-AD7441CB2

EVAL-CONTROL BRD23
8-Lead SOT-23

RT-8
8-Lead SOT-23

RT-8
8-Lead MSOP

RM-8
8-Lead MSOP

RM-8

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Datasheet ID: AD7451ART-R2 517729