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Analog Devices Inc. AD7575JRZ
- Part No.:
- AD7575JRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 18-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7575JRZ.pdf
- Description:
- IC ADC 8BIT SAR 18SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,251
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Product details
Overview
AD7575JRZ from Analog Devices is an 8-bit successive approximation analog-to-digital converter (ADC) with integrated track-and-hold, single +5 V supply operation, 5 µs conversion time, ±1 LSB total unadjusted error (max), and 0 to +70°C operating range. It digitizes full-scale signals up to 50 kHz in microprocessor-based data acquisition systems.
For engineers reviewing the AD7575JRZ datasheet, AD7575JRZ pinout, AD7575JRZ application, or AD7575JRZ equivalent, key selection considerations include its LC2MOS process, 18-lead SOIC package, unipolar 0–2.46 V input range with 1.23 V reference, and dual interface modes (Slow Memory/ROM) for Z80, 8085A-2, 6502, and TMS32010 compatibility.
Technical Context
The AD7575JRZ implements a SAR architecture with on-chip track-and-hold that samples the analog input on the third falling edge of CLK after CS and RD assertion. Its internal clock generator (RCLK/CCLK-based) or external 4 MHz clock supports deterministic 5 µs conversions.
It uses standard microprocessor control signals (CS, RD) to initiate conversion and latch 8-bit parallel output (DB0–DB7) with three-state drivers. The BUSY signal indicates conversion status, enabling WAIT-state or interrupt-driven readout without data bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - resolves 1 part in 256 over full scale (9.61 mV/LSB at 2.46 V FS) |
| Conversion Time | 5 µs - enables 200 kSPS sampling; guaranteed with 4 MHz external clock |
| Total Unadjusted Error | ±1 LSB max - eliminates need for offset/gain calibration in most applications |
| Analog Input Range | 0 to 2 VREF (0–2.46 V) - requires only +1.23 V bandgap reference (e.g., AD589) |
| Full-Power Bandwidth | 50 kHz - supports accurate digitization of 2.46 VPP sine waves (386 mV/µs slew rate) |
| Supply Voltage | +5 V ±5% - operates directly from standard logic rail; no dual supplies needed |
| Power Dissipation | 15 mW typ - low CMOS consumption enables dense embedded designs |
Pinout & Package
AD7575JRZ is housed in an 18-lead small-outline integrated circuit (SOIC) package (R-18), 0.3" wide, surface-mount compatible, with gull-wing leads and standard JEDEC MO-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply | +5 V power rail; decoupling required near pin |
| AGND | Analog ground | Reference return for AIN and VREF; separate from DGND |
| DGND | Digital ground | Return for logic I/O and BUSY/DBx; must be tied to AGND at single point |
| AIN | Analog input | Unipolar 0–2.46 V input; high-impedance (10 MΩ min); source impedance ≤2 kΩ recommended |
| VREF | Reference input | +1.23 V reference; code-dependent impedance (6–18 kΩ); requires low-Z source |
| CLK | Clock input | Accepts 4 MHz external clock or drives internal oscillator (RCLK/CCLK); mark/space 30/70–70/30 |
| CS | Chip select | Active-low enable for conversion start and data read; must be held high between operations |
| RD | Read strobe | Active-low control for latching output data; used with CS to define interface mode |
| TP | Test pin | Must be hard-wired HIGH; not for user signal routing; prevents test-mode activation |
| BUSY | Status output | Active-low open-drain signal indicating conversion in progress; used for WAIT/interrupt |
| DB0–DB7 | Data outputs | Three-state, latched 8-bit parallel output (DB0 = LSB, DB7 = MSB); direct bus connection |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track-and-hold | Eliminates external hold capacitor; supports 50 kHz full-power bandwidth without signal degradation |
| Single-supply operation | Operates from +5 V only with +1.23 V reference-no negative or auxiliary rails required |
| Microprocessor interface logic | Native support for Slow Memory (WAIT) and ROM (non-WAIT) modes across Z80, 8085A-2, 6502, 6809, TMS32010 |
| Low unadjusted error | ±1 LSB max total error ensures monotonicity and no missing codes-calibration optional |
| Fast digital access | 100 ns data access time after RD enables direct interfacing to high-speed microprocessors |
Applications
| Industrial Data Acquisition | Embedded Microcontroller Systems |
|---|---|
Use Scenario: Real-time monitoring of temperature, pressure, and voltage sensors in PLCs and motor controllers. IC Role / Device Role / Timing Role: ADC front-end converting conditioned analog sensor outputs into 8-bit digital words for microcontroller processing. Use Value: 5 µs conversion enables >100 kSPS sampling per channel; ±1 LSB error ensures measurement repeatability without calibration overhead. |
Use Scenario: Sensor digitization in cost-sensitive 8-bit MCU platforms (e.g., Z80, 8085A-2) with limited I/O resources. IC Role / Device Role / Timing Role: Memory-mapped peripheral providing latched, three-state parallel data output synchronized to standard bus cycles. Use Value: Built-in track-and-hold and BUSY signaling allow reliable sampling without external timing logic or FIFO buffers. |
| DSP Interface for TMS32010 | Audio Signal Digitization |
Use Scenario: Analog input stage for early-generation DSP systems requiring low-latency, deterministic sampling. IC Role / Device Role / Timing Role: High-speed ADC mapped to port address, triggered via IN A, PA instruction sequence on TMS32010. Use Value: 100 ns data access and 5 µs conversion meet TMS32010's tight timing constraints at up to 18 MHz clock rates. |
Use Scenario: Digitizing audio-band signals (up to 20 kHz) in test equipment, voice recorders, or ultrasonic receivers. IC Role / Device Role / Timing Role: Track-and-hold ADC capturing full-scale 2.46 VPP sine waves at 50 kHz with 45 dB SNR. Use Value: 386 mV/µs slew rate tolerance and 50 kHz bandwidth preserve waveform fidelity without external sample-hold circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX160BCNG+ | 8-bit SAR ADC; 10 µs conversion; ±0.5 LSB linearity; +5 V supply; 20-pin PDIP | Slower conversion limits sampling rate; tighter linearity but higher cost and larger package | Select when absolute linearity <0.5 LSB is critical and 5 µs speed is not required |
| ADS7816U | 12-bit SAR ADC; 10 µs conversion; ±1 LSB INL; SPI interface; +5 V supply; 8-pin SOIC | Higher resolution but serial interface increases MCU overhead; no built-in track-and-hold | Select when 12-bit resolution justifies added software complexity and external TH circuit |
Compared with MAX160BCNG+ and ADS7816U, the AD7575JRZ uniquely combines 5 µs speed, on-chip track-and-hold, parallel 8-bit output, and ±1 LSB total unadjusted error in an 18-pin SOIC-making it optimal for legacy microprocessor systems demanding minimal latency and zero calibration.
Availability
AD7575JRZ is available at Aetrix Electronics and suitable for industrial data acquisition, embedded microcontroller systems, DSP interfacing, and audio signal digitization requiring stable component supply and long-term obsolescence management.
Supply support for AD7575JRZ 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 AD7575JRZ belongs to Analog Devices' legacy LC2MOS precision ADC product line, designed specifically for microprocessor-centric data acquisition where speed, simplicity, and single-supply operation are essential.
FAQ
What is the maximum input signal frequency the AD7575JRZ can accurately digitize?
The AD7575JRZ supports a full-power signal bandwidth of 50 kHz, meaning it can accurately digitize full-scale 2.46 VPP sine waves up to that frequency. This corresponds to a maximum allowable input slew rate of 386 mV/µs. Performance is verified per Figure 11 in the datasheet, with SNR ≥45 dB at 10 kHz and maintained across the 50 kHz band using appropriate anti-aliasing filtering.
Does the AD7575JRZ require external calibration for typical use?
No, the AD7575JRZ does not require external calibration in most applications due to its ±1 LSB total unadjusted error (max) specification. Offset and full-scale errors are sufficiently low-typically ±0.5 LSB-that system-level accuracy goals are met without trimming. Calibration procedures are documented in the datasheet (pages 9–10) only for applications demanding sub-LSB precision.
How is the AD7575JRZ interfaced to an 8085A-2 microprocessor?
The AD7575JRZ connects to the 8085A-2 using the Slow Memory Interface: CS and RD are driven by address-decoded memory READ signals, BUSY ties to READY, and TP is hard-wired HIGH. Conversion starts on the READ cycle, placing the processor in WAIT until BUSY goes HIGH, then completing the read. Timing compliance is ensured per Figure 4 and Table II in the datasheet.
Can the AD7575JRZ operate with an internal clock, and what are the trade-offs?
Yes, the AD7575JRZ supports internal clock generation using external RCLK (100 kΩ) and CCLK (100 pF). However, unit-to-unit frequency variation can reach ±50%, causing conversion time drift from 5 µs. For time-critical applications or guaranteed 5 µs performance, an external 4 MHz clock is recommended per datasheet Section "INTERNAL/EXTERNAL CLOCK".
What is the function of the TP pin on the AD7575JRZ, and how should it be connected?
The TP (Test Pin) on the AD7575JRZ must be hard-wired to VDD (+5 V) for normal operation. It is reserved for factory testing and has no user functionality. Leaving TP floating or connecting it to any signal other than VDD may cause undefined behavior or failure to acquire valid conversions, as explicitly stated in the datasheet Section "TIMING AND CONTROL".
AD7575JRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 18-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 18-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7575JRZ FAQ
1.How can I place an order for AD7575JRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7575JRZ 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 AD7575JRZ reliable?
The price and inventory of AD7575JRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7575JRZ is usually 5 days.
3.What payment methods are accepted for AD7575JRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7575JRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7575JRZ?
AD7575JRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7575JRZ 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 AD7575JRZ?
For technical support, including AD7575JRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7575JRZ requirements.
6.How does Aetrix verify that AD7575JRZ is sourced from the original manufacturer or authorized distributors?
All AD7575JRZ 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 AD7575JRZ meets industry standards.
7.What is the process for return or replacement of AD7575JRZ?
All AD7575JRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7575JRZ, 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 AD7575JRZ part is unused and in its original packaging.
Return procedure for AD7575JRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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