ADS7251 Datasheet, PDF (1/38 Pages) Texas Instruments – ADS7x51 12-Bit, 2-MSPS and 14-Bit, 1.5-MSPS, Dual, Differential Input, Simultaneous- Sampling, Analog-to-Digital Converters with Internal Reference

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ADS7251, ADS7851
SBAS587A – JANUARY 2014 – REVISED APRIL 2014
ADS7x51 12-Bit, 2-MSPS and 14-Bit, 1.5-MSPS, Dual, Differential Input, Simultaneous-
Sampling, Analog-to-Digital Converters with Internal Reference
1 Features
•1 12- and 14-Bit Pin-Compatible Family
• Simultaneous Sampling of Two Channels
• Supports Fully-Differential Analog Inputs
• Independent Internal Reference (per ADC)
• High Speed:
– Up to 2 MSPS with the ADS7251 (12-Bit)
– Up to 1.5 MSPS with the ADS7851 (14-Bit)
• Excellent Performance:
– ADS7251:
– SNR: 73 dB
– INL: ±1 LSB
– ADS7851:
– SNR: 83.5 dB
– INL: ±2 LSB
• Fully-Specified Over the Extended Industrial
Temperature Range: –40°C to +125°C
• Small Footprint: WQFN-16 (3 mm × 3 mm)
2 Applications
• Motor Control: Direct Interface to SinCos
Encoders
• Optical Networking: EDFA Gain Control Loop
• Protection Relays
• Power Quality Measurement
• Three-Phase Power Controls
• Programmable Logic Controllers
• Industrial Automation
3 Description
The ADS7251 and ADS7851 belong to a family of
pin-compatible, dual, high-speed, simultaneous-
sampling, analog-to-digital converters (ADCs) that
support fully-differential analog inputs and feature two
independent internal voltage references. The
ADS7251 offers 12-bit resolution and up to 2-MSPS
sampling speed. The ADS7851 offers 14-bit
resolution and up to 1.5-MSPS sampling speed.
The devices support a wide digital supply voltage
range, allowing easy communication with a variety of
digital host controllers using a simple, serial interface.
Both devices are fully specified over the extended
industrial temperature range (–40°C to +125°C) and
are available in a pin-compatible, space-saving,
WQFN-16 (3-mm × 3-mm) package.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
ADS7251RTE
WQFN (16)
3 mm × 3 mm
ADS7851RTE
WQFN (16)
3 mm × 3 mm
Typical Application Diagram
C
ADS7851,
R
ADS7251
AINP
VCM
+V
+V
+V
AINM
R
C
C
Internal
Reference
R
VCM
+V
+V
+V
AINP
AINM
R
C
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.