AD7732
2-Channel, ±10 V Input Range, High Throughput, 24-Bit Sigma-Delta ADC
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Features
- High resolution ADC
24 bits no missing codes
±0.0015% nonlinearity - 3-wire serial interface
SPI®, QSPI™, MICROWIRE™, and DSP compatible
Schmitt trigger on logic inputs - Single-supply operation
5 V analog supply
3 V or 5 V digital supply - Package: 28-lead TSSOP
- Optimized for fast channel switching
18-bit p-p resolution (21 bits effective) at 500 Hz
16-bit p-p resolution (19 bits effective) at 2 kHz
14-bit p-p resolution (18 bits effective) at 15 kHz
On-chip per channel system calibration - 2 fully differential analog inputs
Input ranges +5 V, ±5 V, +10 V, ±10 V
Overvoltage tolerant
Up to ±16.5 V not affecting adjacent channel
Up to ±50 V absolute maximum
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The AD7732 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with total conversion times of 500 µs (2 kHz channel switching) making it ideally suitable for high resolution multiplexing applications.
The part can be configured via a simple digital interface, which allows users to balance the noise performance against data throughput up to a 15.4 kHz.
The analog front end features two fully differential input channels with unipolar or true bipolar input ranges to ±10 V while operating from a single +5 V analog supply. The part has an overrange and underrange detection capability and accepts an analog input overvoltage to ±16.5 V without degrading the performance of the adjacent channels.
The differential reference input features “No-Reference” detect capability. The ADC also supports per channel system calibration options. The digital serial interface can be configured for 3-wire operation and is compatible with microcontrollers and digital signal processors. All interface inputs are Schmitt triggered. The part is specified for operation over the extended industrial temperature range of –40ºC to +105ºC and is available in 28-lead TSSOP package.
Other parts in the AD7732 family are the AD7734 and the AD7738.
The AD7734 is similar to AD7732, but its analog front end features four single-ended input channels.
The AD7738 analog front end is configurable for four fully differential or eight single-ended input channels, features 0.625 V to 2.5 V bipolar/unipolar input ranges, and accepts a common-mode input voltage from 200 mV to AVDD – 300 mV. The AD7738 multiplexer output is pinned out externally, allowing the user to implement programmable gain or signal conditioning before being applied to the ADC.
APPLICATIONS
- PLCs/DCS
- Multiplexing applications
- Process control
- Industrial instrumentation
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AD7732
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Data Sheet 1
Application Note 12
AN-311: How to Reliably Protect CMOS Circuits Against Power Supply Overvoltaging
AN-664: AD7732/AD7734/AD7738/AD7739 in Low Power Applications (Rev.0)
AN-663: AD7732/AD7734/AD7738/AD7739 Calibration Registers (Rev.0)
AN-397: Electrically Induced Damage to Standard Linear Integrated Circuits:
AN-388: Using Sigma-Delta Converters-Part 1
AN-626: Using the AD7732/AD7734/AD7738/AD7739 Checksum Register (Rev.0)
AN-389: Using Sigma-Delta Converters-Part 2
AN-615: Peak-to-Peak Resolution Versus Effective Resolution (Rev.0)
AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-Delta ADC (Rev.E)
AN-283: Sigma-Delta ADCs and DACs
AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change (Rev.B)
AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-Delta ADC
Technical Articles 3
Device Drivers 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7732BRUZ |
28-Lead TSSOP (4.4mm x 9.7mm)
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| AD7732BRUZ-REEL |
28-Lead TSSOP (4.4mm x 9.7mm)
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| AD7732BRUZ-REEL7 |
28-Lead TSSOP (4.4mm x 9.7mm)
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- AD7732BRUZ
- Pin/Package Drawing
-
28-Lead TSSOP (4.4mm x 9.7mm)
- Documentation
-
HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
- AD7732BRUZ-REEL
- Pin/Package Drawing
-
28-Lead TSSOP (4.4mm x 9.7mm)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD7732BRUZ-REEL7
- Pin/Package Drawing
-
28-Lead TSSOP (4.4mm x 9.7mm)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 5, 2021
- 21_0035
Amkor Philippines as an Alternate Site for TSSOP_4.4
AD7732BRUZ
PRODUCTION
AD7732BRUZ-REEL
PRODUCTION
AD7732BRUZ-REEL7
PRODUCTION
Jan 20, 2012
- 11_0218
Halogen Free Material Change for Certain TSSOP Products at Carsem
AD7732BRUZ
PRODUCTION
AD7732BRUZ-REEL
PRODUCTION
AD7732BRUZ-REEL7
PRODUCTION
Jun 24, 2011
- 11_0145
AD7732 Process Transfer and Minor Specification Changes
AD7732BRUZ
PRODUCTION
AD7732BRUZ-REEL
PRODUCTION
AD7732BRUZ-REEL7
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 5, 2021
- 21_0035
Amkor Philippines as an Alternate Site for TSSOP_4.4
AD7732BRUZ
PRODUCTION
AD7732BRUZ-REEL
PRODUCTION
AD7732BRUZ-REEL7
PRODUCTION
Jan 20, 2012
- 11_0218
Halogen Free Material Change for Certain TSSOP Products at Carsem
AD7732BRUZ
PRODUCTION
AD7732BRUZ-REEL
PRODUCTION
AD7732BRUZ-REEL7
PRODUCTION
Jun 24, 2011
- 11_0145
AD7732 Process Transfer and Minor Specification Changes
AD7732BRUZ
PRODUCTION
AD7732BRUZ-REEL
PRODUCTION
AD7732BRUZ-REEL7
PRODUCTION
Software & Part Ecosystem
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EVAL-AD7732
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Tools & Simulations 1
Sigma-Delta ADC Tutorial
