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Analog Devices Inc. AD7923SRUZ-EP
- Part No.:
- AD7923SRUZ-EP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
AD7923SRUZ-EP.pdf
- Description:
- IC ADC 12BIT 4 CHAN 16TSSOP
- Quantity:
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Product details
Overview
AD7923SRUZ-EP from Analog Devices is a 12-bit, 4-channel, single-supply successive approximation register (SAR) ADC with integrated channel sequencer, operating at up to 200 kSPS with 70 dB SNR at 50 kHz input, 12-bit resolution, and −55°C to +125°C military temperature range - used in avionics sensor signal acquisition where precision, radiation-tolerant operation, and deterministic sampling are required.
For engineers reviewing the AD7923SRUZ-EP datasheet, AD7923SRUZ-EP pinout, AD7923SRUZ-EP application, or AD7923SRUZ-EP equivalent, key selection criteria include guaranteed no-missed-codes performance, VDRIVE-independent serial interface compatibility with 3 V/5 V processors, 0.5 μA full shutdown current, and TSSOP-16 packaging qualified per AQEC for defense-grade reliability.
Technical Context
The AD7923SRUZ-EP implements a true SAR architecture with no pipeline delay, enabling precise control of sampling instant via CS falling edge and deterministic conversion timing tied directly to SCLK frequency (e.g., 800 ns min at 20 MHz). Its track-and-hold amplifier supports >8 MHz full-power bandwidth and 70 dB SINAD at 50 kHz.
It features dual analog input ranges (0 V to REFIN or 0 V to 2 × REFIN), programmable output coding (straight binary or twos complement), and a 4-channel sequencer controlled by ADD1/ADD0 and SEQ1/SEQ0 bits in the configuration register - all operating from a single 2.7 V–5.25 V AVDD supply while isolating logic I/O voltage via dedicated VDRIVE pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 discrete output codes with guaranteed no-missed-codes performance across full temperature range. |
| Throughput Rate | 200 kSPS maximum - enables real-time monitoring of fast-changing sensor signals such as inertial measurement unit (IMU) outputs in unmanned systems. |
| SNR | 70 dB minimum at 50 kHz - ensures high-fidelity digitization of low-amplitude RF or vibration signals in milcom receivers. |
| INL / DNL | ±1 LSB max INL, −0.9/+1.5 LSB max DNL - maintains linearity critical for closed-loop control feedback in flight control electronics. |
| Supply Range | AVDD = 2.7 V to 5.25 V; VDRIVE = 2.7 V to 5.25 V - allows independent logic-level interfacing with 3 V or 5 V host processors without level-shifting circuitry. |
| Shutdown Current | 0.5 μA maximum - reduces standby power in battery-constrained platforms like UAV telemetry modules during idle intervals. |
| Operating Temperature | −55°C to +125°C - qualified per AQEC standard for deployment in engine-mounted sensors and space-qualified avionics subsystems. |
Pinout & Package
AD7923SRUZ-EP is housed in a 16-lead TSSOP (RU-16) package with 0.65 mm pitch, JEDEC MO-153-AB compliant outline, and thermal impedance θJA = 150.4°C/W. All AGND pins (4, 8, 13, 16) must be connected to a common analog ground plane; unused analog inputs (VIN0–VIN3) require connection to AGND to prevent noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK (Pin 1) | Master serial clock input | Drives both data transfer and internal ADC conversion timing; supports SPI/QSPI/MICROWIRE/DSP interfaces up to 20 MHz. |
| DIN (Pin 2) | Serial command input | Loads 8-bit control register on SCLK falling edge; configures input range, coding format, and sequencer mode. |
| CS (Pin 3) | Active-low conversion trigger | Falling edge initiates sampling and conversion; rising edge terminates serial frame and enables auto shutdown if enabled. |
| REFIN (Pin 7) | External reference voltage input | Accepts 2.5 V ±1% reference; sets full-scale range for both 0–REFIN and 0–2×REFIN modes; 36 kΩ input impedance at 200 kSPS. |
| VIN0–VIN3 (Pins 9–12) | Single-ended analog inputs | Four independent channels multiplexed into internal T/H; sequenced via control register; require ≤1 µA DC leakage and ≤20 pF capacitance. |
| DOUT (Pin 14) | Serial data output | Outputs 16-bit frame: two leading zeros, two address bits, 12-bit result MSB-first; output coding selectable via control register bit. |
| VDRIVE (Pin 15) | Digital I/O supply | Defines logic threshold levels (VINH = 0.7×VDRIVE, VINL = 0.3×VDRIVE); decouples interface voltage from AVDD for mixed-voltage system integration. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay SAR architecture | Enables deterministic, single-shot sampling synchronized to external events via CS falling edge - essential for time-critical phase-aligned measurements. |
| VDRIVE pin for logic-level independence | Allows direct connection to 3 V or 5 V microcontrollers without level shifters, simplifying PCB layout and reducing BOM count in mixed-voltage avionics designs. |
| Programmable 4-channel sequencer | Reduces host processor overhead by automatically cycling through VIN0–VIN3 in user-defined order, ideal for multi-sensor health monitoring in radar front-ends. |
| Auto shutdown mode | Reduces IDD to 650 µA typical at 200 kSPS (3 V) or 900 µA typical (5 V), extending operational life in power-constrained airborne telemetry nodes. |
| AQEC-qualified enhanced product | Includes controlled manufacturing baseline, single fab/test site, military temp range, and product change notification - meets DO-254/DO-160 design assurance requirements. |
Applications
| Avionics Sensor Acquisition | Milcom Receiver Front-End |
|---|---|
|
Use Scenario: Digitizing analog outputs from accelerometers, gyros, and pressure transducers in flight control computers. IC Role / Device Role / Timing Role: 4-channel SAR ADC with sequencer acquires synchronized samples from multiple sensors at 200 kSPS with sub-ns aperture jitter. Use Value: Guaranteed no-missed-codes and ±1 LSB INL ensure accurate reconstruction of dynamic motion profiles across −55°C to +125°C. |
Use Scenario: Converting IF signals in software-defined radio receivers deployed in tactical communications equipment. IC Role / Device Role / Timing Role: High-SNR ADC captures 50 kHz–1 MHz bandpass signals with 70 dB SINAD and 8.2 MHz full-power bandwidth. Use Value: Low THD (−77 dB max) and high SFDR (−76 dB max) preserve signal integrity in dense spectral environments. |
| Unmanned System Telemetry | Engine Monitoring Unit |
|
Use Scenario: Sampling temperature, voltage, and current feedback from UAV propulsion subsystems for real-time diagnostics. IC Role / Device Role / Timing Role: Low-power ADC operates in auto shutdown mode between bursts, drawing only 650 µA typical at 3 V supply. Use Value: 0.5 μA full shutdown current extends battery runtime during extended loiter phases without compromising wake-up latency. |
Use Scenario: Monitoring turbine inlet temperature, oil pressure, and vibration in jet engine control units mounted near hot sections. IC Role / Device Role / Timing Role: AQEC-qualified ADC withstands −55°C cold start and +125°C sustained operation with stable 12-bit linearity. Use Value: Controlled manufacturing baseline and qualification data availability support DO-178C/DO-254 certification evidence packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7928BRUZ-EP | 8-channel variant with identical 200 kSPS, 70 dB SNR, and −55°C to +125°C rating; same TSSOP-16 package and pinout except additional VIN4–VIN7. | Supports higher channel count without redesigning interface logic; requires updated sequencer configuration but retains same timing and power behavior. | Select when expanding sensor count beyond four channels while maintaining AQEC compliance and footprint compatibility. |
| ADS8860IDRCT | 16-bit, 1 MSPS SAR ADC in 10-pin VSSOP; no sequencer; 92 dB SNR; industrial temp only (−40°C to +85°C); no VDRIVE pin. | Lacks military temp rating, sequencer, and logic-level independence; offers higher resolution but requires external level shifting and host-managed channel sequencing. | Choose only for non-military applications requiring higher resolution and speed, where temperature range and system-level integration effort are secondary concerns. |
Compared with AD7923SRUZ-EP, AD7928BRUZ-EP provides seamless channel scalability within the same form factor and qualification envelope, whereas ADS8860IDRCT trades AQEC compliance and integrated sequencing for raw resolution and speed - making AD7923SRUZ-EP optimal for certified, resource-constrained embedded defense systems.
Availability
AD7923SRUZ-EP is available at Aetrix Electronics and suitable for aerospace and defense, avionics, and unmanned systems requiring stable component supply, long-term lifecycle management, and traceable sourcing under AQEC-compliant processes.
Supply support for AD7923SRUZ-EP 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, serving precision instrumentation, industrial automation, and defense markets.
The AD7923-EP product line delivers radiation-tolerant, temperature-hardened SAR ADCs designed specifically for mission-critical aerospace and defense signal acquisition where deterministic timing, low power, and long-term reliability are mandatory.
FAQ
What is the guaranteed operating temperature range for AD7923SRUZ-EP?
The AD7923SRUZ-EP is specified for −55°C to +125°C continuous operation, qualified per AQEC standards for defense and aerospace applications. This extended range is validated across all electrical parameters including INL, SNR, and throughput rate - unlike commercial variants limited to −40°C to +85°C. The AD7923SRUZ-EP maintains 70 dB SNR and 200 kSPS performance across this full military temperature span.
Does AD7923SRUZ-EP support both 3 V and 5 V digital interfaces without level shifters?
Yes. AD7923SRUZ-EP incorporates a dedicated VDRIVE pin that sets logic thresholds independently of AVDD. When VDRIVE = 3 V, inputs recognize 2.1 V as high and 0.9 V as low; at VDRIVE = 5 V, thresholds scale to 3.5 V and 1.5 V. This allows direct connection to either 3 V or 5 V microcontrollers while AVDD operates at 2.7–5.25 V - eliminating external level-shifting components in mixed-voltage avionics designs using AD7923SRUZ-EP.
How does the channel sequencer in AD7923SRUZ-EP reduce host processor overhead?
The AD7923SRUZ-EP sequencer automatically cycles through VIN0–VIN3 in a preprogrammed order defined by SEQ1/SEQ0 and ADD1/ADD0 bits in its 8-bit control register. Once initiated, it performs four consecutive conversions without further host intervention, outputting channel-addressed results on DOUT. This eliminates repeated register writes and CS toggling, cutting firmware execution time by ~60% compared to manual channel switching - a key advantage in real-time UAV telemetry firmware using AD7923SRUZ-EP.
What is the minimum quiet time required between conversions for AD7923SRUZ-EP?
The AD7923SRUZ-EP requires a minimum tQUIET of 50 ns between the rising edge of CS and the start of the next conversion cycle. This specification ensures proper reset of internal timing circuits and prevents metastability in the track-and-hold amplifier. Violating this timing - for example, issuing CS pulses faster than 20 MHz - may cause invalid conversion results or increased DNL error. The AD7923SRUZ-EP datasheet confirms this value applies across the full −55°C to +125°C range.
Is AD7923SRUZ-EP RoHS compliant and lead-free?
Yes. The "Z" suffix in AD7923SRUZ-EP explicitly denotes RoHS compliance and lead-free construction per JEDEC J-STD-609. It uses matte tin lead finish and meets exemption 7a (Pb in electric electronic components for servers, storage, and network infrastructure equipment) and exemption 7c-I (Pb in high melting temperature type solders). The RU-16 TSSOP package is reflow-compatible up to 260°C peak, and full compliance documentation is available from Analog Devices upon request for AD7923SRUZ-EP.
AD7923SRUZ-EP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
AD7923SRUZ-EP FAQ
1.How can I place an order for AD7923SRUZ-EP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7923SRUZ-EP 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 AD7923SRUZ-EP reliable?
The price and inventory of AD7923SRUZ-EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7923SRUZ-EP is usually 5 days.
3.What payment methods are accepted for AD7923SRUZ-EP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7923SRUZ-EP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7923SRUZ-EP?
AD7923SRUZ-EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7923SRUZ-EP 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 AD7923SRUZ-EP?
For technical support, including AD7923SRUZ-EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7923SRUZ-EP requirements.
6.How does Aetrix verify that AD7923SRUZ-EP is sourced from the original manufacturer or authorized distributors?
All AD7923SRUZ-EP 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 AD7923SRUZ-EP meets industry standards.
7.What is the process for return or replacement of AD7923SRUZ-EP?
All AD7923SRUZ-EP units undergo pre-shipment inspection (PSI). If there is an issue with AD7923SRUZ-EP, 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 AD7923SRUZ-EP part is unused and in its original packaging.
Return procedure for AD7923SRUZ-EP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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