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Analog Devices Inc. AD7886JP-REEL
- Part No.:
- AD7886JP-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
AD7886JP-REEL.pdf
- Description:
- IC ADC 12BIT FLASH 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,874
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Product details
Overview
AD7886JP-REEL from Analog Devices is a 12-bit, 750 kHz sampling analog-to-digital converter (ADC) featuring triple-pass flash architecture with on-chip sample-and-hold, ±5 V dual-supply operation, and pin-strappable 0 V–5 V / 0 V–10 V / ±5 V input ranges. It delivers 65 dB SNR at 100 kHz input and 12-bit no-missed-codes performance over 0°C to +70°C for DSP servo control and spectrum analysis systems.
For engineers reviewing the AD7886JP-REEL datasheet, AD7886JP-REEL pinout, AD7886JP-REEL application, or AD7886JP-REEL equivalent, this page provides verified timing parameters (tCONV = 950 ns typ), dynamic specs (THD = –75 dB typ), interface compatibility (CS/RD/CONVST microprocessor control), and package-specific thermal and layout guidance for PLCC-28A2 implementation.
Technical Context
The AD7886JP-REEL implements a triple-pass 4-bit flash ADC architecture using 15 comparators and an internal 4096-resistor DAC to achieve 12-bit resolution in 950 ns typical conversion time. Its on-chip oscillator eliminates external clock requirements, and acquisition time of the track-and-hold amplifier contributes to a total throughput interval of 1.333 µs.
It supports three user-configurable unipolar/bipolar analog input ranges via VIN1/VIN2 pin strapping, uses a fixed –3.5 V reference at VREF (derived externally from +5 V via R1/R2 network), and features three-state DB11–DB0 outputs with 57 ns max data access time-enabling direct interfacing to TMS320C10, ADSP-2100, and other high-speed DSP processors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes across full temperature range (0°C to +70°C). |
| Throughput Rate | 750 kHz - defines maximum sustained sampling rate with 1.333 µs minimum sampling interval. |
| Conversion Time | 950 ns typical - determines minimum time between CONVST pulses for valid successive conversions. |
| SNR @ 100 kHz | 65 dB min - sets usable dynamic range for speech recognition and spectral analysis applications. |
| Power Dissipation | 250 mW typical - enables low-thermal-impact integration in dense DSP signal chains. |
| Analog Input Ranges | 0 V–5 V, 0 V–10 V, or ±5 V - selected by VIN2 pin strap; supports both unipolar and bipolar signal conditioning. |
| Digital Interface | CS/RD/CONVST control with 57 ns max bus access - allows glueless connection to 80C188, TMS320C10, and similar microprocessors. |
Pinout & Package
AD7886JP-REEL is packaged in a 28-lead plastic leaded chip carrier (PLCC-28A2), surface-mountable with gull-wing leads and standard JEDEC MO-118 outline. Thermal pad not present; recommended solder profile per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 10, 19) | Positive power supply | +5 V ±5% - both pins must be tied together and decoupled locally with 0.1 µF ceramic + 10 µF tantalum. |
| VSS (Pins 15, 24) | Negative power supply | –5 V ±5% - both pins must be tied together and decoupled identically to VDD. |
| AGND (Pins 16, 23) | Analog ground reference | Low-noise return for analog circuitry; must be isolated from DGND except at single-point star ground. |
| DGND (Pin 5) | Digital ground reference | Return path for digital I/O; connected to system digital ground plane. |
| VIN1 / VIN2 (Pins 17, 18) | Configurable analog inputs | VIN1 is primary signal input; VIN2 selects range: tied to VIN1 (0–5 V), AGND (0–10 V), or +5REF (±5 V). |
| +5REF / SUM / VREF (Pins 20, 21, 22) | Reference scaling network | +5REF and SUM accept external +5 V reference; VREF requires –3.5 V input derived via on-chip R1/R2 divider. |
| DB0–DB11 (Pins 1–4, 6–9, 25–28) | Three-state parallel data outputs | 12-bit natural binary output (DB11 = MSB); enabled only when CS = RD = LOW; high-impedance otherwise. |
| BUSY (Pin 11) | Conversion status indicator | Active-low open-drain output - goes LOW at CONVST falling edge and returns HIGH after tCONV + t12. |
| CS (Pin 12) | Chip select | Active-low enable for data bus drivers - must be stable before RD assertion. |
| RD (Pin 13) | Read strobe | Active-low signal that latches data onto DB0–DB11 when CS is LOW; defines t6 (57 ns max access window). |
| CONVST (Pin 14) | Conversion start trigger | Falling edge initiates track-to-hold transition; rising edge starts conversion - pulse width ≥50 ns required. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-pass flash architecture | Enables 12-bit accuracy in 950 ns without pipeline latency or calibration overhead. |
| On-chip oscillator and timing logic | Eliminates need for external clock source or timing generator ICs in standalone acquisition systems. |
| Pin-strappable input ranges | Supports 0 V–5 V, 0 V–10 V, and ±5 V configurations without external op-amp gain switching networks. |
| LC2MOS process technology | Combines precision bipolar analog front-end with low-power CMOS logic - achieves 250 mW typical dissipation. |
| Microprocessor-compatible interface | Standard CS/RD/CONVST control signals and 57 ns bus access allow direct attachment to 80C188, TMS320C10, and ADSP-2100. |
Applications
| Digital Signal Processing | Speech Recognition |
|---|---|
Use Scenario: Real-time acquisition of baseband audio signals sampled at 750 kHz for FFT-based feature extraction in embedded voice command systems. IC Role / Device Role / Timing Role: Primary ADC capturing 12-bit samples synchronized to external timer-driven CONVST pulses; BUSY interrupt triggers DMA read. Use Value: 65 dB SNR and –75 dB THD preserve phoneme-level spectral fidelity; fast 57 ns bus access enables zero-wait-state reads on TMS320C10. |
Use Scenario: High-fidelity analog front-end for speaker-independent keyword spotting in industrial HMI devices operating at ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Unipolar 0 V–5 V input mode digitizes conditioned microphone output; on-chip oscillator ensures jitter-free sampling clock. Use Value: No-missed-codes guarantee ensures consistent LPC coefficient calculation; LC2MOS process maintains stability across commercial temperature range. |
| Spectrum Analysis | DSP Servo Control |
Use Scenario: Acquisition stage in portable RF spectrum analyzer measuring 100 kHz–375 kHz band with real-time 2048-point FFT processing. IC Role / Device Role / Timing Role: ADC providing 12-bit samples at 750 kHz to ADSP-2100; BUSY signal clocks external FIFO for burst-mode capture. Use Value: 65 dB SNR enables detection of –65 dBc spurs; 1.333 µs throughput supports >700 kS/s continuous streaming. |
Use Scenario: Closed-loop position feedback digitization in motor drive inverters where analog encoder signals require 12-bit resolution at 10 kHz update rates. IC Role / Device Role / Timing Role: Bipolar ±5 V input mode conditions differential resolver outputs; CONVST triggered by PWM sync signal. Use Value: Integral linearity ±2 LSB ensures <0.05% position error; fast acquisition (<333 ns) captures transient rotor dynamics without aliasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, 750 kHz sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7886KP-REEL | Higher SNR (67 dB min vs. 65 dB min) and guaranteed ±2 LSB integral linearity over same temperature range. | Better suited for high-fidelity spectrum analysis requiring improved harmonic suppression. | Select AD7886KP-REEL when SNR >66 dB is mandatory; otherwise AD7886JP-REEL offers cost-optimized performance for general-purpose DSP. |
| ADS8320U | 16-bit SAR architecture, 100 kSPS max, SPI interface, single +5 V supply - no dual supply or external reference needed. | Targeted at lower-speed, higher-resolution applications with simpler power and layout requirements. | Choose ADS8320U for precision instrumentation where speed <100 kSPS is acceptable and board space is constrained. |
Compared with AD7886KP-REEL, AD7886JP-REEL trades 2 dB SNR and tighter linearity for lower unit cost while retaining identical timing, pinout, and interface behavior. Against ADS8320U, AD7886JP-REEL delivers 7.5× higher throughput and true simultaneous sampling capability but requires dual supplies and external reference conditioning.
Availability
AD7886JP-REEL is available at Aetrix Electronics and suitable for digital signal processing, speech recognition, and DSP servo control applications requiring stable component supply across commercial temperature grades and long-term production continuity.
Supply support for AD7886JP-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 AD7886JP-REEL belongs to Analog Devices' legacy high-speed precision ADC product line, designed specifically for real-time data acquisition in embedded DSP systems where speed, resolution, and microprocessor compatibility are jointly critical.
FAQ
What is the maximum sampling frequency supported by the AD7886JP-REEL?
The AD7886JP-REEL is specified for a 750 kHz throughput rate, corresponding to a minimum sampling interval of 1.333 µs. This is the maximum sustained sampling rate under standard operating conditions (0°C to +70°C, ±5 V supplies, VREF = –3.5 V). While a 1 MHz version exists (AD7886K/B/T variants), the AD7886JP-REEL itself is rated strictly at 750 kHz per its J-grade ordering designation and datasheet specifications.
Does the AD7886JP-REEL require an external clock source?
No, the AD7886JP-REEL does not require an external clock source. It integrates an on-chip oscillator and timing logic that autonomously generate all internal conversion clocks. The only required external timing signal is the CONVST pulse, which controls track/hold transitions and conversion initiation - eliminating clock distribution complexity and jitter sensitivity in the AD7886JP-REEL system design.
How is the analog input range selected on the AD7886JP-REEL?
The AD7886JP-REEL supports three analog input ranges - 0 V–5 V, 0 V–10 V, and ±5 V - selected by connecting VIN2 (Pin 18) to specific voltages while applying the signal to VIN1 (Pin 17). For 0 V–5 V: tie VIN2 to VIN1; for 0 V–10 V: tie VIN2 to AGND; for ±5 V: tie VIN2 to +5REF. This pin-strapping method requires no external switches or configuration registers, making it deterministic and layout-friendly.
What is the purpose of the SUM and +5REF pins on the AD7886JP-REEL?
The +5REF (Pin 20) and SUM (Pin 21) pins form part of an internal resistor network (R1 = 9 kΩ, R2 = 6.3 kΩ) that scales an external +5 V reference down to the precise –3.5 V required at VREF (Pin 22). +5REF accepts the external +5 V source, SUM serves as the summing node where the scaled voltage is generated, and VREF must be driven at –3.5 V ±2% for guaranteed AC and DC performance - enabling accurate reference derivation without discrete op-amp circuitry in the AD7886JP-REEL design.
Can the AD7886JP-REEL interface directly with a TMS320C10 DSP processor?
Yes, the AD7886JP-REEL interfaces directly with the TMS320C10 DSP processor using standard memory-mapped I/O timing. Its CS, RD, and CONVST inputs match TMS320C10 control signal conventions, and its 57 ns max data access time satisfies the processor's read cycle requirements without wait states. BUSY output can be connected to the TMS320C10's INT2 pin to trigger interrupt-driven data reads - a configuration validated in Analog Devices Application Note AN-284 for the AD7886JP-REEL.
AD7886JP-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 750k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Flash
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±5V
- Voltage - Supply, Digital:
- ±5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7886JP-REEL FAQ
1.How can I place an order for AD7886JP-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7886JP-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 AD7886JP-REEL reliable?
The price and inventory of AD7886JP-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7886JP-REEL is usually 5 days.
3.What payment methods are accepted for AD7886JP-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7886JP-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7886JP-REEL?
AD7886JP-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7886JP-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 AD7886JP-REEL?
For technical support, including AD7886JP-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7886JP-REEL requirements.
6.How does Aetrix verify that AD7886JP-REEL is sourced from the original manufacturer or authorized distributors?
All AD7886JP-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 AD7886JP-REEL meets industry standards.
7.What is the process for return or replacement of AD7886JP-REEL?
All AD7886JP-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7886JP-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 AD7886JP-REEL part is unused and in its original packaging.
Return procedure for AD7886JP-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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