My Inquiry
My Account
Analog Devices Inc. AD7920AKS-REEL
- Part No.:
- AD7920AKS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
AD7920AKS-REEL.pdf
- Description:
- IC ADC 12BIT SRL 250KSPS SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:15,273
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7920AKS-REEL from Analog Devices is a 12-bit, single-supply, successive approximation ADC in a 6-lead SC70 package, operating at 250 kSPS with 71 dB SNR at 100 kHz input, 0 to VDD analog input range, and SPI-compatible serial interface. It serves as the primary analog-to-digital conversion stage in ultra-low-power portable instrumentation where precision, small size, and supply-derived reference are critical.
For engineers reviewing the AD7920AKS-REEL datasheet, AD7920AKS-REEL pinout, AD7920AKS-REEL application, or AD7920AKS-REEL equivalent, key selection criteria include guaranteed no missing codes to 12 bits, 1 μA max standby current, 3.6 V to 5.25 V supply compatibility, and absence of pipeline delay for deterministic timing in closed-loop sensing systems.
Technical Context
The AD7920AKS-REEL implements a charge redistribution DAC-based successive approximation architecture with internal track-and-hold, eliminating external sample-hold circuitry. Its conversion is initiated on the falling edge of CS and fully completed in 16 SCLK cycles (3.2 μs max at 5 MHz), with no latency between sampling and result availability.
Reference voltage is derived directly from VDD, enabling full-scale input range of 0 V to VDD without external reference components. The serial interface supports SPI/QSPI/MICROWIRE/DSP protocols, with data output MSB-first and four leading zeros preceding the 12-bit result.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic transfer function and no missing codes across full temperature range. |
| Throughput Rate | 250 kSPS - enables real-time capture of signals up to 125 kHz Nyquist bandwidth with oversampling capability. |
| SNR @ 100 kHz | 71 dB min - supports >11.5 effective number of bits (ENOB) for high-fidelity sensor signal digitization. |
| Supply Range | 2.35 V to 5.25 V - allows direct interfacing with Li-ion battery (3.0–4.2 V), 3.3 V logic, or 5 V legacy systems. |
| Standby Current | 1 μA max - reduces average power to sub-microwatt levels during idle periods in duty-cycled measurement systems. |
| Input Range | 0 V to VDD - eliminates need for level-shifting or external reference, simplifying analog front-end design. |
| Package | 6-lead SC70 (2.0 mm × 1.25 mm × 0.9 mm) - provides smallest footprint among 12-bit SAR ADCs for space-constrained PCBs. |
Pinout & Package
The AD7920AKS-REEL is housed in a 6-lead SC70 package with exposed pad (not electrically connected). All pins are surface-mount compatible and require standard reflow profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power Supply Input | Single 2.35–5.25 V supply powering analog core, reference, and digital interface; also serves as ADC reference voltage source. |
| 2 - GND | Analog Ground Reference | Common return path for analog input, internal track-and-hold, and DAC; must be routed separately from digital ground to minimize noise coupling. |
| 3 - VIN | Analog Input Channel | Single-ended input accepting 0 V to VDD range; 20 pF input capacitance requires low-impedance driving (<130 Ω) for full AC performance. |
| 4 - SCLK | Serial Clock Input | Controls both data readout timing and internal ADC conversion clock; supports 10 kHz–5 MHz operation with 40/60 mark-space ratio. |
| 5 - SDATA | Serial Data Output | Three-state CMOS output delivering 12-bit result MSB-first with four leading zeros; transitions on falling SCLK edge. |
| 6 - CS | Chip Select / Conversion Trigger | Active-low signal initiating sampling on falling edge and framing serial data transfer; minimum pulse width 10 ns. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Deterministic 3.2 μs conversion time enables precise synchronization in time-critical control loops without latency compensation. |
| VDD-referenced conversion | Eliminates external reference IC and associated BOM cost, layout area, and drift error-ideal for battery-powered systems with varying supply voltage. |
| 1 μA max standby current | Reduces average power consumption by >1000× versus active mode, enabling multi-year operation in energy-harvesting or coin-cell applications. |
| 71 dB SNR @ 100 kHz | Supports accurate digitization of low-amplitude, high-frequency sensor outputs (e.g., piezoelectric accelerometers, optical detectors). |
| SC70 footprint | Occupies only 2.5 mm² board area-smallest available package for 12-bit SAR ADCs-critical for wearable and implantable medical devices. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous acquisition of ECG or pulse oximetry signals in handheld diagnostic tools powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary 12-bit analog front-end digitizer, sampling at 250 kSPS with deterministic CS-triggered timing and zero pipeline latency. Use Value: 71 dB SNR preserves diagnostic fidelity of microvolt-level bio-signals; VDD-referenced input accommodates battery discharge from 4.2 V to 3.0 V without recalibration. |
Use Scenario: Environmental monitoring node logging temperature, humidity, and gas concentration over months on AA batteries. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during measurement bursts, entering 1 μA standby between samples. Use Value: Sub-microwatt average power extends battery life beyond 5 years; SC70 package minimizes PCB area for compact enclosure integration. |
| Industrial Handheld Testers | Optical Sensor Interfaces |
Use Scenario: Multifunction calibrator measuring mA loop signals, thermocouples, and RTDs in field service equipment. IC Role / Device Role / Timing Role: Precision ADC for ratiometric measurements, leveraging internal VDD reference to reject supply ripple in noisy industrial environments. Use Value: ±1.5 LSB INL and guaranteed no missing codes ensure traceable accuracy per ISO/IEC 17025; SPI interface simplifies microcontroller integration. |
Use Scenario: Digitizing fast transient outputs from photodiode arrays or laser diode monitors in optical communications modules. IC Role / Device Role / Timing Role: High-speed, low-noise ADC capturing 100 kHz modulated optical signals with minimal aperture jitter (30 ps typ). Use Value: 13.5 MHz full-power bandwidth and 71 dB SNR enable accurate reconstruction of high-frequency optical envelope signals without aliasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200 kSPS, 8-lead SOIC, external reference required, 1.25 mW at 3 V | Larger footprint, higher power, needs external reference; suited for non-battery designs with existing reference infrastructure | Select when board space is unconstrained and system already uses precision external reference for multiple converters. |
| MAX11100ETE+ | 12-bit, 500 kSPS, 12-lead TQFN, internal reference, 2.5 μA standby, 3.6 V to 5.5 V supply | Higher speed and lower standby current but larger 3 mm × 3 mm package and higher minimum supply voltage | Select when throughput >250 kSPS is required and SC70 size constraint is relaxed for improved thermal performance. |
Compared with ADS7822U and MAX11100ETE+, the AD7920AKS-REEL delivers the smallest form factor (2.5 mm² vs. 15–30 mm²), lowest supply voltage support (2.35 V), and tightest integration of reference and conversion logic-making it optimal for miniaturized, ultra-low-voltage, and long-life portable systems.
Availability
AD7920AKS-REEL is available at Aetrix Electronics and suitable for battery-powered medical instruments, portable environmental data loggers, industrial handheld testers, and optical sensor interfaces requiring stable component supply and long-term production continuity.
Supply support for AD7920AKS-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.
The AD7920AKS-REEL belongs to Analog Devices' precision SAR ADC product line, engineered specifically for space- and power-constrained applications demanding high resolution, low noise, and minimal external components in portable and battery-operated systems.
FAQ
What is the guaranteed resolution and missing-code performance of the AD7920AKS-REEL?
The AD7920AKS-REEL is a guaranteed 12-bit converter with no missing codes across its full operating temperature range (−40°C to +85°C). This is explicitly specified in the datasheet's DC Accuracy section for the B Grade, ensuring monotonic behavior and reliable code transitions in all production units of AD7920AKS-REEL.
Does the AD7920AKS-REEL require an external voltage reference?
No, the AD7920AKS-REEL does not require an external voltage reference. Its reference is derived internally from the VDD supply, establishing a 0 V to VDD analog input range. This eliminates external reference components and simplifies design for AD7920AKS-REEL-based systems.
What is the maximum serial clock frequency supported by the AD7920AKS-REEL?
The AD7920AKS-REEL supports a maximum serial clock (SCLK) frequency of 5 MHz, as confirmed in the Timing Specifications table. At this rate, conversion completes in 3.2 μs (16 SCLK cycles), enabling the full 250 kSPS throughput rate specified for AD7920AKS-REEL.
How does the AD7920AKS-REEL achieve low power consumption in standby mode?
The AD7920AKS-REEL achieves 1 μA maximum standby current by entering a full power-down state controlled via the CS pin. In this mode, internal circuitry-including the track-and-hold amplifier and reference-remains inactive, reducing quiescent dissipation to just 5 μW at 5 V, a key feature of AD7920AKS-REEL for energy-sensitive applications.
Is the AD7920AKS-REEL pin-compatible with the AD7910AKS-REEL?
Yes, the AD7920AKS-REEL and AD7910AKS-REEL share identical 6-lead SC70 pinouts and electrical interface definitions (VDD, GND, VIN, SCLK, SDATA, CS), allowing direct substitution in hardware layouts. However, AD7920AKS-REEL delivers 12-bit resolution versus 10-bit for AD7910AKS-REEL, with corresponding improvements in SNR and INL.
AD7920AKS-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SC-70-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7920AKS-REEL FAQ
1.How can I place an order for AD7920AKS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7920AKS-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7920AKS-REEL reliable?
The price and inventory of AD7920AKS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7920AKS-REEL is usually 5 days.
3.What payment methods are accepted for AD7920AKS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7920AKS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7920AKS-REEL?
AD7920AKS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7920AKS-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7920AKS-REEL?
For technical support, including AD7920AKS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7920AKS-REEL requirements.
6.How does Aetrix verify that AD7920AKS-REEL is sourced from the original manufacturer or authorized distributors?
All AD7920AKS-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7920AKS-REEL meets industry standards.
7.What is the process for return or replacement of AD7920AKS-REEL?
All AD7920AKS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7920AKS-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7920AKS-REEL part is unused and in its original packaging.
Return procedure for AD7920AKS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7920AKS-REEL Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
