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Analog Devices Inc. AD7824KRZ-REEL
- Part No.:
- AD7824KRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7824KRZ-REEL.pdf
- Description:
- IC ADC 8BIT FLASH 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,054
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Product details
Overview
AD7824KRZ-REEL from Analog Devices is a 4-channel, 8-bit LC2MOS successive-approximation analog-to-digital converter with built-in track-and-hold, single 5 V supply operation, ±1 LSB total unadjusted error, and 2.5 µs per-channel conversion time. It interfaces directly to Z80, MC68000, and TMS32010 microprocessors in Mode 0 or Mode 1 without external clocking, supporting real-time data acquisition in industrial control and instrumentation systems.
For engineers reviewing the AD7824KRZ-REEL datasheet, AD7824KRZ-REEL pinout, AD7824KRZ-REEL application, or AD7824KRZ-REEL equivalent, key selection considerations include its 4-channel multiplexed analog input architecture, 0 V to 5 V unipolar input range referenced to external VREF, open-drain RDY/INT outputs, and SOIC-24 surface-mount package compatibility with automated PCB assembly.
Technical Context
The AD7824KRZ-REEL implements a half-flash conversion architecture using two 4-bit flash ADCs-one for MSBs and one for LSBs-combined with an internal 4-bit DAC to reconstruct and subtract the MSB approximation from the input signal. This eliminates need for external clock generation and enables deterministic 2.5 µs conversion timing.
It operates in two digital interface modes: Mode 0 uses RDY/INT to assert microprocessor WAIT/DTACK signals during conversion, while Mode 1 decouples conversion initiation from data readback, allowing continuous sampling with 2.5 µs inter-conversion delay. Address inputs A0/A1 select among four analog channels (AIN1–AIN4) with no A2 pin required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete digital codes across full-scale input range |
| Total Unadjusted Error | ±1 LSB max - guarantees monotonicity and no missing codes over 0°C to 70°C |
| Conversion Time | 2.5 µs per channel - enables 100 kHz per-channel sampling rate for real-time signal capture |
| Analog Input Range | 0 V to 5 V - configurable via external VREF(+) and VREF(–) pins for ratiometric or offset operation |
| Supply Voltage | 5 V ±5% - simplifies system power design with single-rail requirement and 50 mW typical dissipation |
| Track-and-Hold Bandwidth | 10 kHz - digitizes full-scale sinusoidal inputs up to 157 mV/µs slew rate without external S/H circuit |
| Digital Interface | CS/RD control with three-state DB0–DB7 outputs - compatible with standard microprocessor memory-read protocols |
Pinout & Package
AD7824KRZ-REEL is housed in a 24-lead SOIC (R-24) package, 15.6 mm × 7.6 mm × 2.35 mm body size, with gull-wing leads and standard JEDEC MS-013AD footprint. Pin 1 identifier located at top-left corner when viewed from top with marking side up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1–AIN4 | Analog input channels | Multiplexed single-ended inputs; selected by A0/A1 address lines; support 0–5 V unipolar or ±4 V bipolar (with external op amp) |
| A0, A1 | Multiplexer address inputs | Binary-encoded channel selection (00=AIN1, 01=AIN2, 10=AIN3, 11=AIN4); no A2 pin present |
| CS, RD | Digital control inputs | Active-low Chip Select and Read enable; initiate conversion and latch address/data in Mode 0 or Mode 1 |
| RDY | Open-drain ready output | Asserts low during conversion; high-impedance upon completion - requires external pull-up for WAIT-state interfacing |
| INT | Open-drain interrupt output | Active-low pulse signaling end of conversion; self-clears on rising edge of CS or RD |
| DB0–DB7 | Three-state data outputs | 8-bit parallel natural binary output; tri-stated until conversion completes; VOL ≤ 0.4 V @ 1.6 mA sink |
| VREF(+), VREF(–) | Differential reference inputs | Define full-scale span (e.g., 5 V differential = 19.5 mV/LSB); enable ratiometric measurement and input offset |
| VDD, GND | Power supply terminals | Single 5 V supply with 50 mW typical power; GND serves as analog/digital common reference point |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track-and-hold function | Eliminates need for external sample-and-hold circuitry when digitizing 10 kHz signals |
| No external clock required | Half-flash architecture enables self-timed 2.5 µs conversion without CLK input or timing constraints |
| Microprocessor-compatible interface | Direct connection to Z80, MC68000, and TMS32010 using standard RD/CS memory-read protocol |
| Configurable reference architecture | VREF(+) and VREF(–) pins allow programmable full-scale range (e.g., 2 V span = 7.8 mV/LSB) and ratiometric operation |
| Low-power LC2MOS process | 40 mW typical dissipation at 5 V supply supports thermally constrained embedded designs |
Applications
| Industrial Data Acquisition | Motor Control Feedback |
|---|---|
|
Use Scenario: Monitoring temperature, pressure, and current sensors across four analog channels in PLC I/O modules. IC Role / Device Role / Timing Role: 4-channel ADC with built-in track-and-hold acquires synchronized samples from multiple transducers at 10 kHz bandwidth. Use Value: Eliminates external S/H and clock circuitry, reducing BOM count and layout area while maintaining ±1 LSB accuracy over 0°C to 70°C. |
Use Scenario: Sampling phase currents and DC bus voltage in three-phase inverter drives with real-time closed-loop response. IC Role / Device Role / Timing Role: Simultaneous sampling of motor feedback signals using AIN1–AIN4 with 2.5 µs conversion latency. Use Value: Enables precise current vector calculation at 100 kHz effective sampling rate per channel, supporting fast PWM update cycles. |
| Medical Instrumentation | Test & Measurement Equipment |
|
Use Scenario: Digitizing ECG, respiration, and SpO₂ sensor outputs in portable patient monitors with battery-powered operation. IC Role / Device Role / Timing Role: Low-power 8-bit ADC converting four biopotential channels using single 5 V rail and minimal external components. Use Value: 50 mW typical power consumption extends battery life; ±1 LSB error ensures clinical-grade signal fidelity without calibration. |
Use Scenario: Front-end signal conditioning in benchtop multimeters and waveform analyzers requiring multi-channel voltage logging. IC Role / Device Role / Timing Role: High-speed 4-channel ADC capturing transient events with 10 kHz analog bandwidth and deterministic 2.5 µs timing. Use Value: Supports 100 kSPS aggregate throughput across four channels, enabling accurate RMS and harmonic analysis without aliasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel 8-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7824LN | Same SOIC-24 package and pinout; ±1/2 LSB total unadjusted error vs. ±1 LSB for AD7824KRZ-REEL | Higher accuracy required in precision sensor interfaces where 0.5 LSB linearity is critical | Select AD7824LN when tighter error budget justifies cost premium; otherwise AD7824KRZ-REEL offers optimal cost/performance balance |
| MAX1136 | 8-channel 8-bit ADC in 28-pin SOIC; requires external clock; 3.5 µs conversion time; 3 V to 5.25 V supply range | Systems needing >4 channels or dual-supply flexibility, but accepting longer conversion latency and added clock routing | Choose MAX1136 only if channel count expansion or 3 V operation is mandatory; AD7824KRZ-REEL provides superior timing determinism and simpler interface |
Compared with AD7824LN, AD7824KRZ-REEL trades 0.5 LSB accuracy for broader commercial temperature range qualification and reel packaging; versus MAX1136, it delivers faster conversion, no-clock operation, and proven microprocessor compatibility at lower system integration complexity.
Availability
AD7824KRZ-REEL is available at Aetrix Electronics and suitable for industrial data acquisition, motor control feedback, and medical instrumentation requiring stable component supply, long-term production continuity, and RoHS-compliant surface-mount packaging.
Supply support for AD7824KRZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD7824 product line was designed for cost-sensitive, space-constrained embedded systems requiring multichannel data acquisition with minimal external components and direct microprocessor integration.
FAQ
What is the operating temperature range for AD7824KRZ-REEL?
The AD7824KRZ-REEL is rated for commercial operation from 0°C to +70°C, as indicated by the "K" grade suffix in its part number. This range is validated per Analog Devices' ordering guide and applies to all electrical specifications including ±1 LSB total unadjusted error, 2.5 µs conversion time, and 5 V ±5% supply operation.
Does AD7824KRZ-REEL require an external clock signal?
No, AD7824KRZ-REEL does not require an external clock signal. Its half-flash conversion architecture uses internal timing circuitry to complete each 8-bit conversion in 2.5 µs deterministically. The absence of a CLK pin simplifies PCB layout and eliminates clock distribution skew and jitter concerns in noise-sensitive analog environments.
How many analog input channels does AD7824KRZ-REEL support?
AD7824KRZ-REEL supports exactly four analog input channels: AIN1, AIN2, AIN3, and AIN4. Channel selection is controlled by the A0 and A1 address inputs per the truth table in the datasheet; the AD7828 variant adds A2 for eight channels, but AD7824KRZ-REEL omits A2 and NC pins accordingly.
What package type is used for AD7824KRZ-REEL?
AD7824KRZ-REEL is supplied in a 24-lead SOIC (Small Outline Integrated Circuit) package designated R-24 per Analog Devices' ordering guide. It measures 15.6 mm × 7.6 mm with 1.27 mm lead pitch and complies with JEDEC MS-013AD standards for automated pick-and-place assembly.
Can AD7824KRZ-REEL operate with a 3.3 V supply?
No, AD7824KRZ-REEL is specified only for 5 V ±5% operation (4.75 V to 5.25 V). Its internal LC2MOS circuitry, reference ladder, and digital I/O thresholds (VINH = 2.4 V min, VINL = 0.8 V max) are optimized for 5 V logic levels. Operation outside this range violates absolute maximum ratings and invalidates all AC/DC specifications.
AD7824KRZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 4
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7824KRZ-REEL FAQ
1.How can I place an order for AD7824KRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7824KRZ-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 AD7824KRZ-REEL reliable?
The price and inventory of AD7824KRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7824KRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7824KRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7824KRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7824KRZ-REEL?
AD7824KRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7824KRZ-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 AD7824KRZ-REEL?
For technical support, including AD7824KRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7824KRZ-REEL requirements.
6.How does Aetrix verify that AD7824KRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7824KRZ-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 AD7824KRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7824KRZ-REEL?
All AD7824KRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7824KRZ-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 AD7824KRZ-REEL part is unused and in its original packaging.
Return procedure for AD7824KRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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