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Analog Devices Inc. AD7819YRZ-REEL7
- Part No.:
- AD7819YRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7819YRZ-REEL7.pdf
- Description:
- IC ADC 8BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:848
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Product details
Overview
AD7819YRZ-REEL7 from Analog Devices is an 8-bit, 200 kSPS successive approximation ADC with on-chip track-and-hold, single 2.7 V–5.5 V supply operation, 4.5 µs conversion time, and 8-bit parallel TTL-compatible interface - used in microprocessor- or DSP-based data acquisition systems requiring low power and fast sampling.
For engineers reviewing the AD7819YRZ-REEL7 datasheet, AD7819YRZ-REEL7 pinout, AD7819YRZ-REEL7 application, or AD7819YRZ-REEL7 equivalent, key selection considerations include guaranteed 8-bit no-missing-codes performance, ±0.5 LSB relative accuracy at 3 V/5 V, automatic power-down mode (57.75 µW @ 1 kSPS), and TSSOP-16 package compatibility with space-constrained industrial and portable designs.
Technical Context
The AD7819YRZ-REEL7 implements a charge redistribution DAC architecture with internal clock oscillator and three-state output drivers. Its control logic synchronizes conversion initiation via CONVST edge detection, BUSY signaling, and parallel read timing governed by CS/RD handshaking - all operating across full industrial temperature range (–40°C to +125°C).
It supports two operational modes: Mode 1 for continuous high-speed sampling (>100 kSPS) without inter-conversion power-down, and Mode 2 enabling automatic power-down between conversions to reduce average power - with 1.5 µs power-up time ensuring reliable startup before each conversion cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - guarantees monotonic transfer function and no missing codes over full temperature range. |
| Max Throughput Rate | 200 kSPS - achieved in Mode 1 with no inter-conversion power-down; requires ≥100 ns setup before next CONVST falling edge. |
| Conversion Time | 4.5 µs max - defines minimum time from CONVST falling edge to BUSY deassertion; sets hard limit on sampling interval. |
| Relative Accuracy | ±0.5 LSB max - ensures end-point linearity error stays within half-LSB tolerance at both 3 V and 5 V supplies. |
| Power Dissipation (3 V) | 10.5 mW normal / 57.75 µW @ 1 kSPS - reflects true dynamic power scaling in Mode 2, critical for battery-powered systems. |
| Analog Input Range | 0 V to VREF - VREF adjustable from 1.2 V to VDD, enabling flexible full-scale range selection without external reference. |
| Signal-to-Noise+Distortion | 48 dB min @ 30 kHz input - measured SNR confirms usable dynamic range for medium-fidelity sensor digitization. |
Pinout & Package
AD7819YRZ-REEL7 is housed in a 16-lead narrow-body thin shrink small outline package (TSSOP), RoHS-compliant, with 0.65 mm lead pitch and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference voltage input | Accepts 1.2 V–VDD; sets full-scale analog input range and LSB size (VREF/256); must be decoupled for AC performance. |
| VIN (Pin 2) | Analog signal input | Single-ended input referenced to AGND; 0 V to VREF range; input leakage ≤±1 µA ensures minimal loading on source. |
| GND (Pin 3) | Common analog/digital ground | Single ground pin shared by analog and digital sections; layout requires low-impedance connection to minimize noise coupling. |
| CONVST (Pin 4) | Convert start control | Rising edge triggers 1.5 µs internal power-up pulse; falling edge initiates conversion; logic level at BUSY fall determines Mode 1/2. |
| CS (Pin 5) | Chip select enable | Active-low; enables output drivers only when combined with RD low; allows multiple devices on same data bus. |
| RD (Pin 6) | Read strobe | Active-low; latches conversion result onto DB0–DB7 when CS is low; controls three-state driver activation timing. |
| BUSY (Pin 7) | Conversion status indicator | Open-drain logic-high active signal; asserts during conversion; falling edge signals result readiness for read access. |
| DB0–DB7 (Pins 8–15) | Parallel data outputs | TTL-compatible three-state outputs; drive 8-bit straight-binary code; high-impedance when CS or RD high. |
| VDD (Pin 16) | Positive supply | 2.7 V–5.5 V single supply; powers analog core, digital logic, and interface drivers; requires local 0.1 µF + 10 µF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track-and-hold | Eliminates need for external sample-hold circuitry; acquisition time ≤100 ns ensures accurate sampling at 200 kSPS. |
| Automatic power-down mode | Reduces average power to 57.75 µW at 1 kSPS - enables decade-long battery life in intermittent-sampling applications. |
| 8-bit parallel TTL interface | Direct connection to 8051, PIC16C6x/7x, and ADSP-21xx without glue logic; supports standard microprocessor memory-mapped I/O timing. |
| Guaranteed no-missing-codes | Ensures monotonicity across full 0–255 code range - essential for closed-loop control and position feedback systems. |
| Wide supply range (2.7–5.5 V) | Supports direct interfacing with 3.3 V and 5 V logic families; eliminates level-shifting requirements in mixed-voltage systems. |
Applications
| Industrial Sensor Interface | Portable Data Logger |
|---|---|
|
Use Scenario: Digitizing thermocouple, RTD, or pressure transducer outputs in PLC I/O modules. IC Role / Device Role / Timing Role: Primary 8-bit ADC capturing analog sensor signals at ≤100 kSPS with microcontroller-triggered burst sampling. Use Value: ±0.5 LSB relative accuracy and on-chip track-and-hold ensure stable readings under EMI-prone factory floor conditions. |
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and light intensity every 10 seconds. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during measurement bursts; spends >99.9% time in auto power-down. Use Value: 57.75 µW average power at 1 kSPS extends AA battery life beyond 5 years without replacement. |
| Motor Control Feedback | DSP-Based Audio Preconditioning |
|
Use Scenario: Sampling current sense amplifier outputs for real-time FOC (field-oriented control) in BLDC motor drives. IC Role / Device Role / Timing Role: High-speed ADC synchronized to PWM carrier; provides timely rotor position feedback for commutation. Use Value: 4.5 µs conversion time and 100 ns acquisition enable sub-microsecond loop latency in closed-loop current regulation. |
Use Scenario: Anti-aliasing digitization of microphone or line-level signals prior to FIR filtering in embedded audio DSPs. IC Role / Device Role / Timing Role: Front-end ADC feeding ADSP-21xx processors; leverages BUSY interrupt for zero-wait-state data capture. Use Value: 48 dB SNR and –70 dB THD support 8-bit voice-grade audio fidelity without external dither or oversampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | SPI interface, 2.7 V–5.25 V supply, 200 kSPS, but no on-chip track-and-hold; requires external sampling capacitor. | Best suited for PCBs with limited GPIO but available SPI bus; unsuitable where analog input settling time must be minimized. | Select ADS7822U only if serial interface reduces routing complexity and external track-and-hold is acceptable. |
| MAX1113EPA+ | 8-bit, 100 kSPS, 2.7 V–5.25 V, parallel interface, but no automatic power-down; typical IDD = 2.5 mA (7.5 mW @ 3 V). | Appropriate for cost-sensitive, non-battery applications where continuous operation is required and power budget >5 mW. | Choose MAX1113EPA+ only when lower throughput suffices and system lacks CONVST timing control for Mode 2 sequencing. |
Compared with ADS7822U and MAX1113EPA+, the AD7819YRZ-REEL7 uniquely combines parallel interface simplicity, integrated track-and-hold, and scalable power-down - making it optimal for microprocessor-based systems needing deterministic timing and ultra-low average power at variable throughput rates.
Availability
AD7819YRZ-REEL7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable data loggers, motor control feedback loops, and DSP-based audio preconditioning requiring stable component supply across extended production lifecycles.
Supply support for AD7819YRZ-REEL7 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 AD7819YRZ-REEL7 belongs to Analog Devices' precision data acquisition IC family, designed specifically for cost-sensitive, space-constrained embedded systems requiring fast, low-power, microprocessor-compatible analog-to-digital conversion without external support components.
FAQ
What is the maximum sampling rate achievable with AD7819YRZ-REEL7 in continuous mode?
The AD7819YRZ-REEL7 achieves up to 200 kSPS in Mode 1 (high-speed sampling), where it remains powered up between conversions. This requires strict adherence to timing: minimum interval between successive CONVST falling edges must exceed conversion time (4.5 µs) plus read access time (t6 ≤10 ns at 3 V), yielding practical sustained throughput near 200 kSPS in optimized microprocessor interfaces.
Does AD7819YRZ-REEL7 require an external clock source?
No, the AD7819YRZ-REEL7 contains an on-chip clock oscillator and requires no external clock. All timing is derived from the CONVST signal: rising edge triggers internal 1.5 µs power-up pulse, and falling edge initiates conversion. This simplifies system design and eliminates clock distribution noise paths.
Can AD7819YRZ-REEL7 operate from a 3.3 V supply while maintaining full specifications?
Yes, AD7819YRZ-REEL7 is fully specified at 3 V ±10% (i.e., 2.7 V–3.3 V). All key parameters - including ±0.5 LSB relative accuracy, 48 dB SNR, 4.5 µs conversion time, and 10.5 mW power dissipation - are guaranteed across this range per the Rev. B datasheet.
How does the automatic power-down mode of AD7819YRZ-REEL7 reduce power consumption?
In Mode 2, AD7819YRZ-REEL7 powers down automatically after each conversion completes (BUSY goes low) and powers up only upon next CONVST rising edge. At 1 kSPS, this limits active time to ~6 µs per cycle, reducing average power from 10.5 mW to 57.75 µW - a 182× improvement confirmed in the Power vs. Throughput Rate plot (Fig. 10).
Is AD7819YRZ-REEL7 pin-compatible with other packages in the AD7819 family?
Yes, AD7819YRZ-REEL7 (TSSOP-16) shares identical pinout and electrical behavior with AD7819YN (DIP-16) and AD7819YR (SOIC-16). All variants use the same pin numbering, signal definitions, and timing - enabling drop-in replacement across form factors without PCB redesign.
AD7819YRZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 200k
- 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:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7819YRZ-REEL7 FAQ
1.How can I place an order for AD7819YRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7819YRZ-REEL7 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 AD7819YRZ-REEL7 reliable?
The price and inventory of AD7819YRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7819YRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7819YRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7819YRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7819YRZ-REEL7?
AD7819YRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7819YRZ-REEL7 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 AD7819YRZ-REEL7?
For technical support, including AD7819YRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7819YRZ-REEL7 requirements.
6.How does Aetrix verify that AD7819YRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7819YRZ-REEL7 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 AD7819YRZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7819YRZ-REEL7?
All AD7819YRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7819YRZ-REEL7, 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 AD7819YRZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7819YRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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