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Analog Devices Inc. AD7828TE/883B
- Part No.:
- AD7828TE/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-CLCC
- Datasheet:
-
AD7828TE/883B.pdf
- Description:
- 8-BIT FLASH ADC, 8 CHANNEL
- Quantity:
- Payment:
- Shipping:
Inventory:487
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Product details
Overview
AD7828TE/883B from Analog Devices is an 8-channel, 8-bit LC2MOS analog-to-digital converter with built-in track-and-hold, single 5 V supply operation, ±1 LSB total unadjusted error, 2.5 µs per-channel conversion time, and operation over –55°C to +125°C for military/aerospace data acquisition systems.
For engineers reviewing the AD7828TE/883B datasheet, AD7828TE/883B pinout, AD7828TE/883B application, or AD7828TE/883B equivalent, this page delivers verified specifications, military-grade package details (E-28A ceramic DIP), timing-mode compatibility (Mode 0/1), and real-world interface guidance for Z80, MC68000, and TMS32010 systems.
Technical Context
The AD7828TE/883B implements a half-flash architecture using two 4-bit flash ADCs - one for MSBs and one for LSBs - with an internal 4-bit DAC to reconstruct and subtract the MSB approximation before LSB conversion. This eliminates external clock requirements and enables deterministic 2.5 µs conversion per channel.
It features fully differential reference inputs (VREF(+) and VREF(–)), allowing ratiometric operation and offset-adjustable input ranges (e.g., 0 V to 5 V unipolar or ±4 V bipolar with external op amp). Its analog input structure inherently provides 1 µs tracking window, supporting full-scale 10 kHz sinusoidal signals without external sample-and-hold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete digital codes across full-scale range |
| Total Unadjusted Error | ±1 LSB max - includes offset, gain, and linearity errors; no user trimming required |
| Conversion Time | 2.5 µs per channel (Mode 0) - sets maximum per-channel sampling rate at 400 kSPS |
| Analog Input Bandwidth | 10 kHz full-scale - supports digitization of 157 mV/µs slew-rate signals with rated accuracy |
| Supply Voltage | 5 V ±5% - single-supply operation simplifies power design; no dual-rail or charge pumps needed |
| Operating Temperature | –55°C to +125°C - qualified per MIL-STD-883B for extended-range military and avionics use |
| Power Dissipation | 50 mW typical - low quiescent current (16 mA max) enables thermally constrained embedded deployments |
Pinout & Package
AD7828TE/883B is supplied in a hermetically sealed 28-pin ceramic Dual-in-Line Package (E-28A), compliant with MIL-STD-883B processing and rated for extended temperature operation. The package features 0.600" body width, 0.300" lead spacing, and tin-lead solderable leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1–AIN8 | Analog Input Channels | Eight single-ended inputs; selected via A0/A1/A2 address lines; each supports 0 V to 5 V range with 10 kHz bandwidth |
| A0, A1, A2 | Multiplexer Address Inputs | 3-bit binary address selects one of eight analog channels; latched on rising edge of RD in Mode 1 |
| CS | Chip Select | Active-low enable; initiates conversion when pulled low with RD in Mode 0; controls device selection in shared bus systems |
| RD | Read Strobe | Active-low control; triggers conversion start (Mode 0) or latches address and reads prior result (Mode 1) |
| RDY | Ready Output | Open-drain status signal; goes high-impedance at end of conversion to indicate valid DB0–DB7 data |
| INT | Interrupt Output | Active-low pulse; asserts at conversion completion; used to signal microprocessor WAIT/DTACK or trigger ISR |
| DB0–DB7 | Data Bus Outputs | Three-state parallel outputs; deliver 8-bit natural binary code; compatible with TTL/CMOS logic levels (VOH ≥ 4.0 V, VOL ≤ 0.4 V) |
| VREF(+), VREF(–) | Differential Reference Inputs | Define full-scale range; support ratiometric measurement and offset-adjustable spans (e.g., 2.5 V span yields 9.77 mV/LSB) |
| VDD, GND | Power Supply | Single 5 V supply; decoupling (47 µF + 0.1 µF) required at VDD/GND pins per datasheet layout guidance |
Key Features
| Feature | Design Value |
|---|---|
| Half-flash conversion architecture | Eliminates need for external ADC clock; enables deterministic 2.5 µs conversion time independent of processor speed |
| Built-in track-and-hold function | Provides inherent 1 µs sampling aperture; supports 10 kHz full-scale signals without external S/H circuitry |
| Fully differential reference interface | Enables ratiometric sensing and programmable input span (e.g., 0–2.5 V, ±4 V) using external op amps like AD544 |
| Two-mode digital interface (Mode 0/1) | Supports both WAIT-state microprocessors (Z80, MC68000) and non-WAIT systems (TMS32010) without hardware changes |
| MIL-STD-883B qualified E-28A package | Hermetic ceramic DIP ensures reliability in high-vibration, radiation-prone, and extreme-temperature environments |
Applications
| Real-Time Speech Analysis | Avionics Sensor Data Acquisition |
|---|---|
|
Use Scenario: Digitizing eight microphone or filter-bank outputs simultaneously in airborne voice recognition units. IC Role / Device Role / Timing Role: 8-channel analog front-end with per-channel 10 kHz bandwidth and deterministic 2.5 µs conversion latency. Use Value: Eliminates eight discrete S/H circuits and reduces board space by consolidating into one MIL-qualified ADC with guaranteed timing. |
Use Scenario: Monitoring engine vibration, cabin pressure, and environmental sensors in flight control computers. IC Role / Device Role / Timing Role: High-reliability, extended-temperature ADC interfacing to legacy 16-bit processors (e.g., MC68000) via Mode 0 WAIT protocol. Use Value: Full MIL-STD-883B qualification ensures operation at –55°C to +125°C without derating; E-28A package withstands mechanical shock per MIL-STD-202. |
| Industrial Programmable Logic Controller (PLC) I/O Module | Test Equipment Channel Expansion |
|
Use Scenario: Adding eight analog input points to modular PLC backplanes requiring deterministic scan timing and noise immunity. IC Role / Device Role / Timing Role: Standalone ADC with three-state data bus, INT/RDY handshaking, and 50 mW power envelope for dense I/O card layouts. Use Value: Single 5 V supply and TTL-compatible outputs simplify integration with existing 5 V logic; ±1 LSB error avoids calibration in factory-floor deployments. |
Use Scenario: Upgrading legacy benchtop DMMs or waveform analyzers with additional synchronized analog capture channels. IC Role / Device Role / Timing Role: Pin-compatible upgrade path from AD7828CQ/BQ; same footprint and timing allows drop-in replacement in calibrated test fixtures. Use Value: Maintains traceable metrology chain through MIL-qualified process; identical electrical specs ensure no recalibration burden. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, 8-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7828CQ | Same core architecture and pinout; commercial/industrial grade (–40°C to +85°C); plastic DIP (Q-28) package | Lacks MIL-STD-883B screening, hermetic seal, and extended temperature range; unsuitable for aerospace deployment | Select AD7828CQ only for cost-sensitive industrial prototypes where extended temp and radiation tolerance are not required. |
| MAX195BCPP | 5 V, 16-bit, serial-output ADC; 1.2 µs conversion; no built-in track-and-hold; requires external reference and clock | Higher resolution but serial interface increases MCU overhead; lacks multichannel mux and integrated S/H | Choose MAX195BCPP only when 16-bit precision outweighs channel count, parallel interface, and S/H integration needs. |
Compared with AD7828CQ, AD7828TE/883B adds hermetic packaging, extended temperature operation, and MIL-STD-883B screening-critical for mission-critical systems-while maintaining identical electrical behavior. Versus MAX195BCPP, AD7828TE/883B trades resolution for integrated 8-channel multiplexing, parallel output, and zero-clock operation-reducing BOM count and firmware complexity in real-time control loops.
Availability
AD7828TE/883B is available at Aetrix Electronics and suitable for aerospace telemetry, avionics sensor interfaces, and ruggedized industrial control systems requiring stable component supply across long production lifecycles and extreme environmental conditions.
Supply support for AD7828TE/883B 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and defense markets since 1965.
The AD7828TE/883B belongs to Analog Devices' legacy LC2MOS precision data acquisition product line, engineered specifically for high-speed, multichannel, military-grade analog-to-digital conversion in resource-constrained embedded systems.
FAQ
What is the operating temperature range of the AD7828TE/883B?
The AD7828TE/883B is qualified for operation from –55°C to +125°C per MIL-STD-883B, making it suitable for aerospace, defense, and downhole industrial applications where extended thermal stability is mandatory. This range exceeds that of commercial variants like AD7828CQ (–40°C to +85°C).
Does the AD7828TE/883B require an external clock signal?
No, the AD7828TE/883B uses a half-flash conversion architecture that eliminates the need for an external clock. Conversion is initiated solely by CS and RD control signals, enabling simpler system timing and reduced component count compared to SAR or sigma-delta ADCs.
How does the AD7828TE/883B handle analog input settling for high-frequency signals?
The AD7828TE/883B incorporates an inherent track-and-hold function with a 1 µs effective sampling aperture. It supports full-scale 10 kHz sinusoidal inputs (157 mV/µs slew rate) without external circuitry, provided source impedance remains ≤100 Ω to ensure proper capacitor charging within the input RC network.
What package type is used for the AD7828TE/883B?
The AD7828TE/883B is supplied in an E-28A package: a 28-pin hermetically sealed ceramic Dual-in-Line Package with 0.600" body width, compliant with MIL-STD-883B processing and rated for extended temperature operation and high-reliability environments.
Can the AD7828TE/883B be interfaced directly to a Z80 microprocessor?
Yes, the AD7828TE/883B supports Mode 0 operation, which is designed for microprocessors with WAIT-state capability like the Z80. When mapped to a memory address (e.g., C000h), a read instruction asserts RDY to extend the bus cycle until conversion completes, placing the result directly into the CPU register.
AD7828TE/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-CLCC
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Flash
- Reference Type:
- External
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 28-CLCC (11.43x11.43)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7828TE/883B FAQ
1.How can I place an order for AD7828TE/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7828TE/883B 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 AD7828TE/883B reliable?
The price and inventory of AD7828TE/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7828TE/883B is usually 5 days.
3.What payment methods are accepted for AD7828TE/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7828TE/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7828TE/883B?
AD7828TE/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7828TE/883B 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 AD7828TE/883B?
For technical support, including AD7828TE/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7828TE/883B requirements.
6.How does Aetrix verify that AD7828TE/883B is sourced from the original manufacturer or authorized distributors?
All AD7828TE/883B 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 AD7828TE/883B meets industry standards.
7.What is the process for return or replacement of AD7828TE/883B?
All AD7828TE/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD7828TE/883B, 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 AD7828TE/883B part is unused and in its original packaging.
Return procedure for AD7828TE/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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