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Analog Devices Inc. AD7899ARSZ-1
- Part No.:
- AD7899ARSZ-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD7899ARSZ-1.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,018
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Product details
Overview
AD7899ARSZ-1 from Analog Devices is a 14-bit, 400 kSPS successive-approximation ADC with integrated track/hold, 2.5 V reference, and high-speed parallel interface. It operates from a single 5 V supply, supports ±10 V and ±5 V bipolar input ranges, and delivers 78 dB SNR at 100 kHz input - used in precision data acquisition systems for industrial process control and automated test equipment.
For engineers reviewing the AD7899ARSZ-1 datasheet, AD7899ARSZ-1 pinout, AD7899ARSZ-1 application, or AD7899ARSZ-1 equivalent, this page provides verified specifications, validated pin functions, confirmed analog input range behavior (±10 V / ±5 V), real-world timing constraints (2.2 µs conversion time, 0.3 µs track/hold acquisition), and documented alternative options for industrial-grade 14-bit SAR ADC replacement.
Technical Context
The AD7899ARSZ-1 implements a laser-trimmed internal clock oscillator enabling fixed 400 kSPS throughput without external timing components; it also accepts an external 6.5 MHz clock via CLKIN for synchronized multi-device sampling. Its track/hold amplifier achieves 0.3 µs acquisition to ±1/2 LSB with 4.5 MHz –3 dB bandwidth, supporting full-scale sine wave digitization up to 200 kHz.
Conversion control uses edge-triggered CONVST to initiate hold mode and start conversion; BUSY/EOC serves dual-mode signaling (BUSY active-high during conversion, EOC pulse-low at completion). Data output follows standard parallel read protocol with CS/RD handshaking and 14-bit three-state DB0–DB13 bus, compatible with both 3 V and 5 V logic levels via independent VDRIVE supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output codes; LSB = 1.22 mV (±10 V range) or 610 µV (±5 V range). |
| Throughput Rate | 400 kSPS maximum - enables real-time capture of signals up to 200 kHz Nyquist frequency. |
| Conversion Time | 2.2 µs max - defines minimum inter-conversion interval; critical for high-speed burst sampling. |
| Track/Hold Acquisition | 0.3 µs max - ensures valid sampling after conversion completion or analog input step change. |
| SNR @ 100 kHz | 78 dB min (TMIN to TMAX) - guarantees usable dynamic range for medium-frequency sensor signals. |
| INL (Relative Accuracy) | ±2 LSB max - limits integral nonlinearity error to ≤0.012% of full scale across operating temperature. |
| Power Dissipation | 80 mW typical (125 mW max) - supports low-thermal-load designs in space-constrained industrial modules. |
Pinout & Package
AD7899ARSZ-1 is housed in a 28-lead Shrink Small Outline Package (SSOP), RoHS-compliant, with 0.65 mm lead pitch and exposed pad thermal enhancement. Pin numbering follows standard SSOP top-view layout with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | Reference Input/Output | Access point for internal 2.5 V ±20 mV reference; accepts external 2.5 V ±5% source; requires 0.1 µF decoupling to AGND. |
| VINA, VINB | Differential Analog Inputs | Support ±10 V (VINB = AGND) or ±5 V (VINA = VINB) configuration; overvoltage tolerant to ±18 V (±10 V range). |
| CONVST | Convert Start Input | Rising-edge-triggered control signal that initiates track-to-hold transition and starts conversion sequence. |
| BUSY/EOC | Conversion Status Output | Active-high BUSY during conversion; transitions low at end-of-conversion (EOC) when data is valid. |
| DB0–DB13 | Parallel Data Outputs | 14-bit three-state outputs; MSB = DB13; coding is two's complement for AD7899ARSZ-1; driven by VDRIVE supply. |
| VDRIVE | Digital I/O Supply | Independent 3 V or 5 V supply for logic interface - enables direct connection to 3 V microcontrollers without level shifters. |
| STBY | Standby Mode Control | Active-low input reducing power consumption from 80 mW to 20 µW; wake-up latency ≤5 µs with external reference. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5 V reference | Internal buffered reference with ±10 mV error at 25°C and 25 ppm/°C TC - eliminates need for external reference in cost-sensitive applications. |
| Overvoltage protected inputs | Analog inputs withstand ±18 V (±10 V range) without damage - simplifies front-end protection design in noisy industrial environments. |
| Flexible clocking architecture | Selectable internal oscillator or external 6.5 MHz clock via CLKIN pin - enables deterministic timing or multi-device synchronization. |
| Low-power standby mode | Reduces IDD from 25 mA to 20 µA - extends battery life in portable instrumentation and enables duty-cycled measurement schemes. |
| 3 V/5 V logic compatibility | VDRIVE pin allows independent digital supply - supports mixed-voltage systems and avoids level-shifter components in FPGA/microcontroller interfaces. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous monitoring of pressure, temperature, and flow transducers in PLC-based control cabinets with ±10 V sensor outputs. IC Role / Device Role / Timing Role: Primary SAR ADC capturing synchronized multi-channel analog data at 400 kSPS with deterministic 2.2 µs conversion latency. Use Value: Eliminates external reference and track/hold ICs, reducing BOM count while maintaining ±2 LSB INL across –40°C to +85°C. |
Use Scenario: High-speed stimulus-response testing of analog circuits using pattern generators and digitizers in benchtop ATE platforms. IC Role / Device Role / Timing Role: Precision digitizer stage accepting ±5 V DUT outputs; triggered via CONVST with BUSY/EOC handshake for tight timing control. Use Value: 78 dB SNR at 100 kHz ensures accurate spectral analysis of device under test; 0.3 µs acquisition enables rapid successive sampling. |
| Motor Drive Current Sensing | Portable Data Loggers |
|
Use Scenario: Isolated phase current measurement in servo drives using shunt amplifiers with ±5 V output swing. IC Role / Device Role / Timing Role: Bipolar-input ADC interfacing directly to isolated amplifier outputs; STBY pin enables power-gating between motor commutation cycles. Use Value: Overvoltage tolerance prevents latch-up during switching transients; 80 mW typical dissipation avoids thermal derating in enclosed enclosures. |
Use Scenario: Battery-powered environmental sensor nodes logging temperature, humidity, and voltage over extended periods. IC Role / Device Role / Timing Role: Low-power ADC activated on timer interrupt; enters STBY mode between samples to minimize average current draw. Use Value: 20 µA standby current extends 2xAA battery life to >1 year at 1 SPS sampling; internal reference removes calibration drift dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7899AR-1 | Same core architecture and specs, but in 28-lead SOIC (R-28) instead of SSOP (RS-28); θJA = 95°C/W vs. 95°C/W; identical pinout. | Preferred for through-hole prototyping or legacy PCBs designed for SOIC footprint; slightly larger board area required. | Select AD7899AR-1 if SOIC package compatibility or manual soldering is required; no electrical or functional trade-offs. |
| AD7682BCPZ | 16-bit, 250 kSPS SAR ADC with SPI interface; no internal reference; requires external 2.5 V reference; lower power (6.5 mW at 100 kSPS). | Suited for higher-resolution, lower-throughput applications where serial interface and smaller 20-lead LFCSP package are advantageous. | Choose AD7682BCPZ when resolution >14-bit is mandatory and system can accommodate SPI interface and external reference design effort. |
Compared with AD7899AR-1, AD7899ARSZ-1 offers identical performance in a space-saving SSOP package ideal for high-density industrial PCBs; versus AD7682BCPZ, AD7899ARSZ-1 trades 2-bit resolution for 1.6× higher throughput, parallel interface simplicity, and integrated reference - making it optimal for real-time control loops requiring deterministic latency.
Availability
AD7899ARSZ-1 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, motor drive current sensing, and portable data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7899ARSZ-1 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, headquartered in Norwood, MA, with design centers worldwide.
The AD7899 product line delivers fast, low-power, single-supply 14-bit SAR ADCs with integrated references and flexible input ranges - engineered for precision data acquisition in industrial, instrumentation, and aerospace applications.
FAQ
What input voltage ranges does the AD7899ARSZ-1 support?
The AD7899ARSZ-1 supports ±10 V and ±5 V bipolar input ranges. Configuration is hardware-selectable: tie VINB to AGND for ±10 V operation, or connect VINA and VINB together for ±5 V operation. The part does not support unipolar (0 V to 5 V) or ±2.5 V ranges - those are exclusive to AD7899-2 and AD7899-3 variants respectively.
Does the AD7899ARSZ-1 require an external reference?
No, the AD7899ARSZ-1 includes an internal 2.5 V ±20 mV reference accessible via the VREF pin. A 0.1 µF capacitor to AGND is required for stability. An external 2.5 V ±5% reference may be applied to VREF to override the internal source, but it is not required for basic operation of the AD7899ARSZ-1.
How is the AD7899ARSZ-1 clocked, and what is its maximum throughput?
The AD7899ARSZ-1 uses either its internal laser-trimmed oscillator or an external 6.5 MHz clock applied to CLKIN. Throughput is fixed at 400 kSPS when using the internal clock. With external clocking, throughput scales linearly with input frequency - achieving 400 kSPS requires exactly 16 clock cycles per conversion, so CLKIN must be ≥6.5 MHz for full-rate operation. The AD7899ARSZ-1 achieves 400 kSPS maximum throughput.
What is the function of the BUSY/EOC pin on the AD7899ARSZ-1?
The BUSY/EOC pin on the AD7899ARSZ-1 is a dual-function signal: it goes high at the rising edge of CONVST and remains high throughout conversion (BUSY mode), then goes low at conversion completion (EOC mode). Its state is determined by CONVST logic level at end-of-conversion - enabling either continuous BUSY monitoring or precise EOC-triggered read timing. This behavior is inherent to the AD7899ARSZ-1 design.
Can the AD7899ARSZ-1 interface directly with 3 V microcontrollers?
Yes, the AD7899ARSZ-1 supports direct 3 V logic interfacing via the VDRIVE pin. When VDRIVE is supplied with 3 V ±10%, all digital inputs (CS, RD, CONVST, CLKIN, STBY) recognize 1.7 V as VIH min and 1.3 V as VIL max, and outputs (DB0–DB13, BUSY/EOC) drive to 2.6 V VOH min and 0.4 V VOL max - meeting standard 3 V CMOS thresholds without level shifters.
AD7899ARSZ-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 400k
- 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, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7899ARSZ-1 FAQ
1.How can I place an order for AD7899ARSZ-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7899ARSZ-1 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 AD7899ARSZ-1 reliable?
The price and inventory of AD7899ARSZ-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7899ARSZ-1 is usually 5 days.
3.What payment methods are accepted for AD7899ARSZ-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7899ARSZ-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7899ARSZ-1?
AD7899ARSZ-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7899ARSZ-1 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 AD7899ARSZ-1?
For technical support, including AD7899ARSZ-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7899ARSZ-1 requirements.
6.How does Aetrix verify that AD7899ARSZ-1 is sourced from the original manufacturer or authorized distributors?
All AD7899ARSZ-1 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 AD7899ARSZ-1 meets industry standards.
7.What is the process for return or replacement of AD7899ARSZ-1?
All AD7899ARSZ-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7899ARSZ-1, 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 AD7899ARSZ-1 part is unused and in its original packaging.
Return procedure for AD7899ARSZ-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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