Overview
Features and Benefits
- 16 Bits Resolution with No Missing Codes
- On-board Low Drift Reference with Buffer and Temperature Sensor
- Differential Input Range: ±VREF (VREF up to 2.5V)
- Throughput:
3 MSPS (Wideband Warp and Warp Mode)
2 MSPS (Normal Mode)
1.25 MSPS (Impulse Mode) - INL ±2 LSB Max (±30 ppm of FS)
- SINAD: 89 dB Typ @ 100 kHz
- THD: -103 dB Typ @ 100 kHz
- Parallel (16 or 8 bits bus) and Serial 5 V/3.3 V/2.5 V Interface
- SPI®/QSPI™/MICROWIRE™/DSP Compatible
- No Pipeline Delay ( SAR architecture )
- Single 2.5 V Supply Operation
- Power Dissipation: 70 mW Typ @ 3 MSPS With REF
Product Details
The AD7621 is a 16-bit, 3 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 16-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Wideband Warp) for undersampling applications and, for asynchronous conversion rate applications, a fast mode (Normal) and, for low power applications, a reduced power mode (Impulse) where the power is scaled with the throughput. Operation is specified from −40°C to +85°C.
It is available in a 48-lead LQFP or a 48-lead LFCSP with operation specified from –40°C to +85°C.
PRODUCT HIGHLIGHTS
- Fast Throughput.
The AD7621 is a 3 MSPS, charge redistribution, 16-bit SAR ADC. - Superior Linearity.
The AD7621 has no missing 16-bit code. - Internal Reference.
The AD7621 has a 2.048 V internal reference with a typical drift of ±7 ppm/°C. - Single-Supply Operation.
The AD7621 operates from a 2.5 V single supply and typically dissipates 65 mW. In impulse mode, its power dissipation decreases with the throughput. - Serial or Parallel Interface.
Versatile parallel (16- or 8-bit bus) or 2-wire serial interface arrangement compatible with 2.5 V, 3.3 V, or 5 V logic.
APPLICATIONS
- Medical instruments
- High speed data acquisition
- Digital signal processing
- Communications
- Instrumentation
- Spectrum analysis
- ATE
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
-
Understanding PulSAR ADC Support Circuitry7/30/2020
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AN-932: Power Supply Sequencing2/1/2008
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Digital X-Ray Technology Improves Patient Experience and Physician Diagnostics11/28/2014
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Designing Power Supplies for High Speed ADC2/1/2012
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Which ADC Architecture Is Right for Your Application?6/1/2005 Analog Dialogue
Tools & Simulations
Product Recommendations
AD7621 Companion Parts
Recommended Driver Amplifiers
- For low noise, low distortion, low power: ADA4841-1.
- For single-ended to differential driver applications: AD8139, ADA4930-1.
- For low noise, high gain bandwidth: AD8021, ADA4899-1, AD8022.
- For a fully differential attenuating precision amplifier: AD8475.
Recommended External Voltage References
Design Resources
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 |
|---|---|---|---|---|
| AD7621ACPZ | Material Declaration | Reliability Data | 48-Lead LFCSP (7mm x 7mm x 0.85mm w/ EP) | |
| AD7621ASTZ | Material Declaration | Reliability Data | 48-Lead LQFP (7mm x 7mm) | |
| AD7621ASTZRL | Material Declaration | Reliability Data | 48-Lead LQFP (7mm x 7mm) | |
| Wafer Fabrication Data |
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Sample & Buy
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Lead Times
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