Features and Benefits
- 16-bit ADC family
- Dual simultaneous sampling
- Fully differential analog inputs
- Throughput conversion rate
- 1 MSPS for AD4680
- 500 kSPS for AD4681
- SNR (typical)
- 92.5 dB, VREF = 3.3 V external
- 100 dB with 8× OSR, RES = 1
- On-chip oversampling function
- Resolution boost function
- INL (maximum) 1.5 LSBs
- 2.5 V internal reference at 10 ppm/°C
- High speed serial interface
- −40°C to +125°C operation
- 3 mm × 3 mm, 16-lead LFCSP
- Wide common-mode range
- Alert function
The AD4680/AD4681 are 16-bit, pin-compatible, dual simultaneous sampling, high speed, low power, successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a 3.0 V to 3.6 V power supply and feature throughput rates of 1 MSPS for the AD4680 and 500 kSPS for the AD4681. The analog input type is differential, accepts a wide common-mode input voltage, and is sampled and converted on the falling edge of CS. Integrated on-chip oversampling blocks improve dynamic range and reduce noise at lower bandwidths. A buffered internal 2.5 V reference is included. Alternatively, an external reference up to 3.3 V can be used.
The conversion process and data acquisition use standard control inputs, allowing easy interfacing to microprocessors or digital signal processors (DSPs). The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces using a separate logic supply. The AD4680/AD4681 are available in a 16-lead lead frame chip scale package (LFCSP) with operation specified from −40°C to +125°C.
- Motor control position feedback
- Motor control current sense
- Power quality
- Data acquisition systems
- Erbium doped fiber amplifier (EDFA) applications
- Inphase (I) and quadrature (Q) demodulation
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
The EVAL-AD7380FMCZ and EVAL-AD7381FMCZ are full featured evaluation boards that evaluate all features of the AD7380 and AD7381 analog-to-digital converters (ADCs). The evaluation boards can be controlled by the EVAL-SDP-CH1Z via the 160-way system demonstration platform (SDP) connector, J4. The EVAL-SDP-CH1Z board controls the evaluation boards through the USB port of a PC using the Analysis, Control, Evaluation (ACE) software, which is available for download from the ACE software page.
Complete specifications for the AD7380 and AD7381 are provided in the AD7380/AD7381 data sheet. Consult these specifications in conjunction with the user guide when using the evaluation boards. Full details on the EVAL-SDP-CH1Z are available on the SDP-H1 product page. The comprehensive ACE user guide is available on the ACE software page.
The EVAL-AD7380FMCZ can be used to evaluate the AD4680 and AD4681. The AD4680 and AD4681 have slower throughput rates (at 1 MSPS and 500 kSPS, respectively) than the AD7380. The throughput can be adjusted to fit for AD4680 and AD4681 by adjusting the clock speed and the sampling frequency.
Figure 1 in the user guide shows the typical setup of the EVAL-AD7380FMCZ board. The setup for the EVAL-AD7381FMCZ board is the same as the EVAL-AD7380FMCZ setup.
Documentation & Resources
Fast Reacting, Optical Encoder Feedback System for Miniature Motor Driven Applications4/1/2020 Analog Dialogue
High Accuracy Resolver Simulator System with Fault Injection Function8/16/2019 Analog Dialogue
Software & Systems Requirements
AD4681 Companion Parts
Recommended Driver Amplifiers
- For high frequency, low noise, low distortion Application: ADA4896-2.
- For Precision low power Application: ADA4807-2, ADA4805-2.
- For Precision, low density Application: ADA4940-2.
Recommended Low Dropout Regulators
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 Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|AD4681BCPZ-RL||Material Declaration||Reliability Data||16-Lead LFCSP (3mm x 3mm x 0.75mm w/ EP)|
|AD4681BCPZ-RL7||Material Declaration||Reliability Data||16-Lead LFCSP (3mm x 3mm x 0.75mm w/ EP)|
|Wafer Fabrication Data|
Sample & Buy
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Buy Now Pricing
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.