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Analog Devices Inc. AD7899SR-1
- Part No.:
- AD7899SR-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7899SR-1.pdf
- Description:
- IC ADC 14BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,281
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Product details
Overview
AD7899SR-1 from Analog Devices is a 14-bit, 400 kSPS successive-approximation ADC operating from a single 5 V supply, featuring an integrated 2.5 V reference, track/hold amplifier, and high-speed parallel interface. It supports ±5 V and ±10 V bipolar input ranges, delivers 78 dB SNR at 100 kHz input, and targets precision data acquisition in harsh-environment industrial and military systems.
For engineers reviewing the AD7899SR-1 datasheet, AD7899SR-1 pinout, AD7899SR-1 application, or AD7899SR-1 equivalent, this page provides verified specifications, military-grade temperature operation (–55°C to +125°C), timing-critical interface guidance, and validated alternative options for high-reliability analog-to-digital conversion.
Technical Context
The AD7899SR-1 implements a laser-trimmed internal clock oscillator enabling fixed 2.2 µs conversion time and 400 kSPS throughput; external clocking via CLKIN is supported with 6.5 MHz max frequency and 60/40 duty cycle limit. Its track/hold acquires to ±1/2 LSB in 0.3 µs, with aperture jitter of 25 ps and –3 dB full-power bandwidth of 4.5 MHz.
Conversion control uses edge-triggered CONVST to initiate hold mode and start conversion, while BUSY/EOC serves dual-purpose signaling - asserted high during conversion and transitioning low at completion. Data output follows standard parallel read protocol using CS and RD with 3 V or 5 V logic compatibility via dedicated VDRIVE pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete digital codes for high-fidelity signal digitization |
| Throughput Rate | 400 kSPS - enables real-time sampling of signals up to 200 kHz Nyquist bandwidth |
| Input Range | ±5 V or ±10 V - supports standard industrial bipolar sensor outputs without external scaling |
| SNR @ 100 kHz | 78 dB min - ensures >12.6 effective bits for precision measurement applications |
| Power Dissipation | 80 mW typ at 5 V - balances performance and thermal management in compact designs |
| Operating Temp | –55°C to +125°C - qualified for extended-range military and aerospace deployment |
| Relative Accuracy | ±2 LSB max INL - guarantees monotonicity and predictable transfer function error |
Pinout & Package
AD7899SR-1 is housed in a 28-lead SOIC (R-28) package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-013AC compliance. Thermal impedance θJA = 95°C/W supports operation up to 125°C junction temperature under typical PCB layout conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA / VINB | Analog Input Pair | Differential-capable inputs configured for ±10 V (VINB = AGND) or ±5 V (VINA = VINB); overvoltage tolerant to ±18 V |
| VREF | Reference I/O | Access point for internal 2.5 V ±20 mV reference; accepts external 2.5 V ±5% source with 6 kΩ output impedance |
| CONVST | Conversion Start | Rising-edge-triggered command that initiates track-to-hold transition and starts ADC conversion sequence |
| BUSY/EOC | Status Output | Open-drain dual-function signal: high during conversion (BUSY), low at completion (EOC) |
| DB0–DB13 | Parallel Data Bus | 14-bit three-state outputs delivering two's complement code; compatible with 3 V or 5 V microprocessor buses via VDRIVE |
| STBY | Power-Down Control | Active-low input reducing current draw to 20 µA typ; enables rapid wake-up (<5 µs) for intermittent sampling |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5 V Reference | ±10 mV initial error and 25 ppm/°C drift enable stable full-scale calibration without external components |
| Overvoltage Protection | Analog inputs withstand ±18 V (±10 V range) without damage - eliminates need for external clamping diodes |
| Track/Hold Acquisition | 0.3 µs settling to ±1/2 LSB allows back-to-back conversions at maximum 400 kSPS rate |
| VDRIVE Logic Supply | Dedicated 3 V/5 V selectable I/O rail permits direct interfacing to mixed-voltage systems without level shifters |
| Military Temperature Grade | –55°C to +125°C operation with full specification compliance - certified for S-version screening per MIL-STD-883 |
Applications
| Industrial Process Monitoring | Aerospace Flight Control Sensors |
|---|---|
|
Use Scenario: Continuous digitization of strain gauge, RTD, and pressure transducer outputs in oil & gas downhole tools and factory PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC capturing bipolar analog signals with ±10 V range and high noise immunity in electrically noisy environments. Use Value: 78 dB SNR and ±2 LSB INL ensure accurate representation of small-signal variations amid EMI-rich plant-floor conditions. |
Use Scenario: Real-time acquisition of inertial measurement unit (IMU) and actuator feedback signals in flight control computers and avionics subsystems. IC Role / Device Role / Timing Role: High-reliability ADC performing deterministic 2.2 µs conversions synchronized to system timing clocks in safety-critical loops. Use Value: –55°C to +125°C qualification and 4.5 MHz full-power bandwidth support dynamic response requirements of closed-loop stabilization systems. |
| Military Radar Signal Conditioning | High-Voltage Power Electronics Monitoring |
|
Use Scenario: Digitizing intermediate-frequency (IF) signals and receiver chain diagnostics in ground-based radar front-ends operating in extreme ambient temperatures. IC Role / Device Role / Timing Role: Precision ADC handling wide dynamic range inputs with minimal aperture jitter (25 ps) to preserve signal integrity in coherent processing chains. Use Value: Low 25 ps aperture jitter and 78 dB SNR maintain phase coherence required for Doppler processing and beamforming algorithms. |
Use Scenario: Isolated voltage and current sensing in 3-phase motor drives, HVDC converters, and battery management systems with ±10 V sensor interfaces. IC Role / Device Role / Timing Role: Robust ADC accepting overvoltage transients up to ±18 V while maintaining linearity during fast-switching power stage events. Use Value: ±18 V absolute maximum rating on analog inputs prevents latch-up during IGBT switching spikes, reducing system protection complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed 14-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7899BR-1 | Same architecture and pinout; ±1.5 LSB INL vs. ±2 LSB; commercial temp range (–40°C to +85°C) | Lacks military temperature qualification; suitable for non-extreme environmental deployments | Select when tighter INL is required and operating temperature stays within commercial range |
| AD7682BCPZ | 16-bit SAR ADC; 250 kSPS; SPI interface; no internal reference; requires external 2.5 V reference | Lower throughput, serial interface only, higher resolution - trades speed for precision in space-constrained designs | Choose for higher resolution needs where 250 kSPS suffices and board space favors SPI over parallel bus |
Compared with AD7899BR-1, AD7899SR-1 trades ±0.5 LSB INL tolerance for guaranteed operation across –55°C to +125°C; versus AD7682BCPZ, it delivers 60% higher throughput and integrated reference at the cost of 2-bit resolution and parallel interface footprint.
Availability
AD7899SR-1 is available at Aetrix Electronics and suitable for industrial process monitoring, aerospace flight control sensors, military radar signal conditioning, and high-voltage power electronics monitoring requiring stable component supply across extended temperature ranges.
Supply support for AD7899SR-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and defense markets since 1965.
The AD7899 product line delivers high-speed, low-power, single-supply 14-bit ADCs with integrated references and robust input protection - engineered for demanding data acquisition in harsh, mission-critical environments.
FAQ
What is the operating temperature range of the AD7899SR-1?
The AD7899SR-1 is rated for operation from –55°C to +125°C, meeting military-grade environmental requirements. This specification is confirmed in the Ordering Guide and Absolute Maximum Ratings sections of the official datasheet, and applies across all electrical parameters including SNR, INL, and conversion time without derating.
Does the AD7899SR-1 require an external reference voltage?
No, the AD7899SR-1 includes an internal 2.5 V ±20 mV reference accessible via the VREF pin. A 0.1 µF decoupling 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 mandatory for basic operation of the AD7899SR-1.
How does the BUSY/EOC pin function on the AD7899SR-1?
The BUSY/EOC pin on the AD7899SR-1 operates in dual mode: it asserts high at the rising edge of CONVST and remains high throughout conversion, then goes low to signal end-of-conversion (EOC). Its behavior is determined solely by CONVST state at conversion completion - no configuration register or setup is needed to use this feature on the AD7899SR-1.
Can the AD7899SR-1 interface directly with a 3 V microcontroller?
Yes, the AD7899SR-1 supports 3 V logic interfacing via its dedicated VDRIVE pin. When VDRIVE is supplied with 3 V ±10%, all digital inputs (CS, RD, CONVST, CLKIN, STBY) and outputs (DB0–DB13, BUSY/EOC) operate at 3 V logic levels - eliminating level-shifting circuitry in mixed-voltage systems using the AD7899SR-1.
What is the maximum analog input overvoltage rating for AD7899SR-1?
The AD7899SR-1 analog inputs tolerate up to ±18 V when configured for the ±10 V range, and –9 V to +18 V for the ±5 V range, as specified in the Absolute Maximum Ratings table. This overvoltage capability is inherent to the input structure and applies across the full –55°C to +125°C operating range of the AD7899SR-1.
AD7899SR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- -55°C ~ 125°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7899SR-1 FAQ
1.How can I place an order for AD7899SR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7899SR-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 AD7899SR-1 reliable?
The price and inventory of AD7899SR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7899SR-1 is usually 5 days.
3.What payment methods are accepted for AD7899SR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7899SR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7899SR-1?
AD7899SR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7899SR-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 AD7899SR-1?
For technical support, including AD7899SR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7899SR-1 requirements.
6.How does Aetrix verify that AD7899SR-1 is sourced from the original manufacturer or authorized distributors?
All AD7899SR-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 AD7899SR-1 meets industry standards.
7.What is the process for return or replacement of AD7899SR-1?
All AD7899SR-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7899SR-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 AD7899SR-1 part is unused and in its original packaging.
Return procedure for AD7899SR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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