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Analog Devices Inc. AD876JST-REEL
- Part No.:
- AD876JST-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
AD876JST-REEL.pdf
- Description:
- IC ADC 10BIT 20MSPS CMOS 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,931
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Product details
Overview
AD876JST-REEL from Analog Devices is a 10-bit, 20 MSPS CMOS analog-to-digital converter (ADC) with on-chip sample-and-hold, pipelined architecture, and guaranteed no missing codes. It operates from a single +5 V analog/digital supply and +3.3 V digital I/O supply, dissipates 160 mW, and supports differential nonlinearity of ±0.5 LSB. It is used in CCD-based imaging systems including color scanners and electronic still cameras.
For engineers reviewing the AD876JST-REEL datasheet, AD876JST-REEL pinout, AD876JST-REEL application, or AD876JST-REEL equivalent, this page delivers verified technical context, package-specific pin mapping for the 48-lead TQFP variant, real-world timing and dynamic performance data, and validated alternative options for video-speed ADC selection.
Technical Context
The AD876JST-REEL implements a multistage pipelined ADC architecture with output error correction logic to achieve 10-bit accuracy at 20 MSPS while guaranteeing no missing codes across 0°C to +70°C. Its internal sample-and-hold amplifier features force-sense reference inputs (REFTF/REFTS, REFBF/REFBS) to minimize voltage drop errors in high-precision applications.
It supports three-state digital outputs, standby mode reducing power below 50 mW, and dual-voltage digital I/O compatibility (DRVDD = +3.3 V or +5 V). The pipeline latency is 3.5 clock cycles, aperture jitter is 22 ps, and full-power bandwidth is 150 MHz - enabling use in demanding video and imaging signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - defines quantization step size of ~1.95 mV for 2 Vp-p input range. |
| Sampling Rate | 20 MSPS - supports real-time digitization of baseband video signals up to ~10 MHz Nyquist frequency. |
| Power Dissipation | 160 mW at 20 MSPS - enables portable, battery-powered imaging systems without active cooling. |
| Differential Nonlinearity | ±0.5 LSB - ensures monotonic transfer function and prevents code ambiguities in closed-loop control. |
| Effective Number of Bits | 9.0 bits at fIN = 1 MHz - reflects actual SNR-limited resolution under typical video-band conditions. |
| Aperture Jitter | 22 ps - limits sampling uncertainty to <0.02° phase error at 10 MHz input, preserving signal integrity. |
| Reference Input Range | VREFTS = 3.5–4.5 V, VREFBS = 1.6–2.5 V - sets programmable 1.9–2.9 V full-scale analog input span. |
Pinout & Package
AD876JST-REEL is packaged in a 48-lead thin quad flatpack (TQFP), RoHS-compliant, surface-mount package measuring 7 mm × 7 mm × 1.0 mm (max height). Pin pitch is 0.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0 (LSB) | Digital Output | Least significant bit of straight-binary 10-bit output word; driven from DRVDD-referenced buffer. |
| D9 (MSB) | Digital Output | Most significant bit; synchronized to CLK with 10–20 ns output delay; three-state controllable. |
| CLK | Digital Input | Single-ended clock input buffered from DRVDD; accepts +3.3 V or +5 V CMOS logic; defines 20 MSPS conversion rate. |
| THREE-STATE | Digital Input | Active-low control enabling high-impedance state on D0–D9 outputs; allows bus sharing without external logic. |
| STBY | Digital Input | Active-high entry into standby mode; reduces power consumption to <50 mW for low-duty-cycle operation. |
| AIN | Analog Input | Differential-capable single-ended input; 5 pF capacitance; requires drive capable of settling to 10-bit accuracy in 25 ns. |
| REFTF / REFTS | Analog Input | Force/sense pair for top reference voltage; eliminates IR drop errors in PCB traces and bond wires. |
| REFBF / REFBS | Analog Input | Force/sense pair for bottom reference voltage; enables precise 2 Vp-p input span setting with <35 mV offset. |
| AVDD / AVSS | Power | +5 V analog supply and analog ground; must be within 0.5 V of DVDD to maintain INL/DNL specs. |
| DVDD / DVSS | Power | +5 V digital supply and digital ground; powers core logic; decoupling critical for noise-sensitive ADC operation. |
| DRVDD / DRVSS | Power | +3.3 V or +5 V I/O supply and ground; sets logic thresholds for all digital pins and output drive strength. |
| CML | Analog Output | Bias point bypass terminal; connects to 0.1 µF capacitor to AVSS to stabilize internal common-mode level. |
Key Features
| Feature | Design Value |
|---|---|
| Pipelined multistage architecture with error correction | Enables 20 MSPS throughput with 10-bit accuracy and guaranteed no missing codes over temperature. |
| Force-sense reference interface (REFTF/REFTS, REFBF/REFBS) | Compensates for PCB trace resistance, eliminating up to ±1 LSB reference error in production layouts. |
| Three-state digital outputs with DRVDD-referenced buffers | Supports direct connection to shared data buses without external transceivers or level shifters. |
| Standby mode with <50 mW power draw | Extends battery life in portable CCD imagers by >60% during idle intervals between frame captures. |
| Single +5 V analog/digital supply with +3.3 V I/O option | Reduces BOM count by eliminating separate analog/digital regulators in compact imaging modules. |
Applications
| Color Scanners | Digital Copiers |
|---|---|
Use Scenario: Digitizing RGB line-scan sensor outputs at 10–15 MSPS for real-time halftone processing. IC Role / Device Role / Timing Role: Primary ADC capturing 10-bit pixel data per channel; synchronized to linear encoder clock. Use Value: 9.0 ENOB at 1 MHz ensures accurate tonal reproduction in 24-bit color pipelines without post-processing correction. |
Use Scenario: High-speed document scanning at 600 dpi with 3-line CIS sensor array. IC Role / Device Role / Timing Role: Simultaneous digitization of R/G/B channels using three AD876JST-REELs; clocked from shared PLL. Use Value: 160 mW total power per ADC enables thermal management in fanless copier chassis designs. |
| Electronic Still Cameras | Camcorders |
Use Scenario: Interfacing with interline-transfer CCDs in DSLR preview and JPEG capture paths. IC Role / Device Role / Timing Role: Front-end ADC for live view processing engine; operates in burst mode with STBY toggling between frames. Use Value: Standby mode cuts average power by 70%, extending battery runtime during composition without sacrificing startup latency. |
Use Scenario: Digitizing composite video (NTSC/PAL) baseband signals in portable camcorder SoC interfaces. IC Role / Device Role / Timing Role: ADC feeding Y/C separation and MPEG-2 encoding pipeline; clocked at 13.5 MHz for ITU-R BT.601 compliance. Use Value: Differential nonlinearity ≤ ±0.5 LSB preserves luminance linearity critical for broadcast-grade chroma keying. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9203ARUZ | 10-bit, 40 MSPS, 115 mW; LVDS outputs; no force-sense reference; 28-lead TSSOP. | Higher speed but lacks REFTS/REFBS pins; requires external reference buffering for precision imaging. | Choose when system clock exceeds 20 MSPS and layout allows LVDS routing; not drop-in due to different pinout and interface. |
| MAX1186ETM+ | 10-bit, 20 MSPS, 155 mW; internal reference; SPI-configurable; 48-lead TQFP. | Integrated reference simplifies BOM but sacrifices flexibility in span/offset tuning for CCD bias optimization. | Prefer for cost-sensitive, lower-precision applications where external reference design overhead must be minimized. |
Compared with AD876JST-REEL, AD9203ARUZ offers double the sampling rate but requires redesign for LVDS termination and lacks force-sense stability; MAX1186ETM+ reduces component count via internal reference but trades off adjustable input span and guaranteed no-missing-codes assurance at temperature extremes.
Availability
AD876JST-REEL is available at Aetrix Electronics and suitable for color scanner modules, digital copier imaging subsystems, and electronic still camera preview engines requiring stable component supply, long-term obsolescence planning, and consistent parametric performance across production lots.
Supply support for AD876JST-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, founded in 1965 and headquartered in Wilmington, MA.
The AD876 belongs to Analog Devices' high-speed precision ADC product line, designed specifically for video, imaging, and communications applications demanding 10-bit resolution at 20 MSPS with low power and robust reference architecture.
FAQ
What is the operating temperature range for the AD876JST-REEL?
The AD876JST-REEL is specified for commercial operation from 0°C to +70°C. This range is validated across all key parameters including INL (±1.0 LSB), DNL (±0.5 LSB), and ENOB (9.0 bits at 1 MHz), ensuring reliable performance in office equipment and consumer imaging devices without extended thermal qualification.
Does the AD876JST-REEL support differential analog input?
The AD876JST-REEL accepts single-ended analog input on the AIN pin but does not implement a true differential input stage. Its architecture relies on precise common-mode rejection via force-sense reference inputs (REFTS/REFBS) and tight supply matching (AVDD within 0.5 V of DVDD) to achieve effective differential-like performance in noisy environments.
Can the AD876JST-REEL be operated with only a +5 V supply?
Yes - the AD876JST-REEL can operate with AVDD = DVDD = +5 V and DRVDD = +5 V. However, DRVDD must be set to +3.3 V if interfacing with 3.3 V logic families; mixing supplies is permitted, but AVDD and DVDD must remain within 0.5 V of each other to meet datasheet INL/DNL specifications.
What is the purpose of the CML pin on the AD876JST-REEL?
The CML pin on the AD876JST-REEL provides access to an internal common-mode bias node. It must be bypassed to AVSS with a 0.1 µF ceramic capacitor to stabilize the internal analog core and prevent gain/offset drift caused by supply noise coupling into the pipeline stages.
Is the AD876JST-REEL pin-compatible with the AD876JR-8?
No - the AD876JST-REEL (48-lead TQFP) and AD876JR-8 (28-lead SOIC) have fundamentally different pinouts and package footprints. While both belong to the AD876 family and share functional equivalence in 10-bit mode, PCB layout, decoupling, and thermal management are not interchangeable between these variants.
AD876JST-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 20M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 7
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD876JST-REEL FAQ
1.How can I place an order for AD876JST-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD876JST-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 AD876JST-REEL reliable?
The price and inventory of AD876JST-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD876JST-REEL is usually 5 days.
3.What payment methods are accepted for AD876JST-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD876JST-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD876JST-REEL?
AD876JST-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD876JST-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 AD876JST-REEL?
For technical support, including AD876JST-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD876JST-REEL requirements.
6.How does Aetrix verify that AD876JST-REEL is sourced from the original manufacturer or authorized distributors?
All AD876JST-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 AD876JST-REEL meets industry standards.
7.What is the process for return or replacement of AD876JST-REEL?
All AD876JST-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD876JST-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 AD876JST-REEL part is unused and in its original packaging.
Return procedure for AD876JST-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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