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Analog Devices Inc. AD7327TRUZ-EP-RL7
- Part No.:
- AD7327TRUZ-EP-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
AD7327TRUZ-EP-RL7.pdf
- Description:
- IC ADC 12BIT 8CH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,730
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Product details
Overview
AD7327TRUZ-EP-RL7 from Analog Devices is a radiation-hardened, 8-channel, 12-bit plus sign successive approximation ADC with true bipolar input capability, 500 kSPS throughput, software-selectable input ranges (±10 V, ±5 V, ±2.5 V, 0 V to +10 V), and integrated 2.5 V reference. It operates across −55°C to +125°C and supports high-precision data acquisition in defense avionics, space-based telemetry, and ruggedized industrial control systems.
For engineers reviewing the AD7327TRUZ-EP-RL7 datasheet, AD7327TRUZ-EP-RL7 pinout, AD7327TRUZ-EP-RL7 application, or AD7327TRUZ-EP-RL7 equivalent, this enhanced product delivers verified military-grade temperature performance, iCMOS® high-voltage analog input integrity, channel sequencing, and SPI-/QSPI-/DSP-compatible serial interface - all in a RoHS-compliant 20-lead TSSOP package.
Technical Context
The AD7327TRUZ-EP-RL7 implements a 13-bit SAR architecture with internal track-and-hold, supporting single-ended, true differential, and pseudo-differential configurations per channel. Its iCMOS® process enables ±16.5 V analog supply rails (VDD/VSS) while maintaining low power consumption and high input impedance (>1 GΩ typical).
It features a programmable channel sequencer, temperature indicator, and flexible reference operation - either internal 2.5 V or external up to 3.0 V - enabling extended input ranges (e.g., ±12 V with 3 V reference). The serial interface uses 16 SCLK cycles per conversion and supports multiple coding formats (straight binary or two's complement) via control register configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit plus sign (13-bit effective), guaranteeing no missing codes in differential mode and 12-bit linearity in single-ended mode. |
| Throughput Rate | 500 kSPS maximum - enables real-time monitoring of fast transients in motor control feedback or sensor fusion systems. |
| Analog Input Ranges | Software-selectable per channel: ±10 V, ±5 V, ±2.5 V, or 0 V to +10 V - eliminates external signal conditioning for mixed-signal industrial I/O modules. |
| Supply Voltages | VDD = +12 V to +16.5 V; VSS = −12 V to −16.5 V; VCC/VDRIVE = +2.7 V to +5.25 V - supports high-voltage sensor interfacing without level-shifting. |
| Power Dissipation | 19 mW at full operational rate (500 kSPS), dropping to 38.25 µW in full shutdown - suitable for power-constrained embedded telemetry nodes. |
| Temperature Range | −55°C to +125°C - qualified per AQEC standard for defense/aerospace deployment with controlled manufacturing baseline. |
| Reference | Internal 2.5 V ±10 mV over temperature; supports external reference up to 3.0 V - enables ±12 V input range when paired with ±12 V supplies. |
Pinout & Package
AD7327TRUZ-EP-RL7 is housed in a 20-lead TSSOP (RU-20) package compliant with JEDEC MO-153-AC, with 0.65 mm pitch and exposed pad not connected internally. Pin functions are validated per Analog Devices Rev. C datasheet (Page 9, Figure 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-low enable for conversion initiation and serial frame synchronization; critical for multi-device SPI bus arbitration. |
| DIN (Pin 2) | Serial Data Input | Accepts 16-bit register writes (range, mode, channel address) on SCLK falling edge - configures per-channel input behavior before conversion. |
| DGND (Pins 3, 19) | Digital Ground | Reference for logic interface; must be within 0.3 V of AGND to prevent digital noise coupling into analog measurements. |
| AGND (Pin 4) | Analog Ground | Reference for all analog inputs and REFIN/OUT; star-point grounding required to maintain >72 dB channel-to-channel isolation. |
| REFIN/OUT (Pin 5) | Reference I/O | Provides 2.5 V internal reference or accepts external 2.5–3.0 V source; requires 680 nF decoupling capacitor for stability. |
| VIN0–VIN7 (Pins 7–14) | Analog Inputs | Eight multiplexed inputs configurable as single-ended, true differential (e.g., VIN0/VIN1), or pseudo-differential - supports mixed-mode acquisition in one device. |
| VDD (Pin 15) | Positive Analog Supply | +12 V to +16.5 V rail powering analog front-end; minimum ±10 V required for ±10 V input range operation. |
| VCC (Pin 16) | ADC Core Supply | +2.7 V to +5.25 V supply for SAR core and logic; independent of VDRIVE to support mixed-voltage system interfacing. |
| VDRIVE (Pin 17) | Interface Logic Supply | Defines logic threshold levels (VIH/VIL); must not exceed VCC by >0.3 V - enables 3.3 V MCU interfacing with 5 V analog section. |
| DOUT (Pin 18) | Serial Data Output | MSB-first 16-bit stream: 3 channel ID bits + sign bit + 12 data bits - enables unambiguous channel attribution in sequenced acquisitions. |
| SCLK (Pin 20) | Serial Clock | Master clock for both data transfer and conversion timing; 10 MHz max supports 500 kSPS with 16-cycle readout. |
Key Features
| Feature | Design Value |
|---|---|
| iCMOS® Process Integration | Enables true bipolar ±16.5 V analog input capability with 22 MHz full-power bandwidth and <50 ps aperture jitter - critical for high-fidelity signal capture in radar IF sampling. |
| Per-Channel Software-Selectable Ranges | Each of eight inputs independently configured for ±10 V, ±5 V, ±2.5 V, or 0–10 V - eliminates external gain-switching circuitry in multi-sensor data loggers. |
| Channel Sequencer with Auto-Addressing | Hardware-accelerated round-robin or custom sequence execution without host CPU intervention - reduces firmware overhead in real-time control loops. |
| Enhanced Product Qualification | AQEC-compliant manufacturing with single fab/assembly/test site, military temp range (−55°C to +125°C), and product change notification - meets MIL-PRF-38535 Class K requirements. |
| Low-Power Dynamic Modes | Autostandby (0.87 mA) and full shutdown (1 µA) modes with sub-microsecond wake-up - extends battery life in remote condition-monitoring sensors. |
Applications
| Avionics Flight Control Sensors | Spacecraft Power System Monitoring |
|---|---|
|
Use Scenario: Real-time acquisition of redundant gyroscope, accelerometer, and pitot-static signals in fly-by-wire systems. IC Role / Device Role / Timing Role: Primary ADC for safety-critical analog sensor fusion, operating at 500 kSPS with deterministic latency and channel sequencing. Use Value: Guaranteed no missing codes and ±0.5 LSB gain error match ensure consistent cross-channel calibration across −55°C to +125°C thermal cycling. |
Use Scenario: Telemetry of solar array voltage/current, battery cell voltages, and thermal sensor outputs aboard LEO satellites. IC Role / Device Role / Timing Role: Radiation-tolerant, high-voltage ADC interfacing directly to ±12 V bus monitors and isolated current shunts. Use Value: Internal 2.5 V reference stability (±10 mV over temperature) and ±16.5 V supply tolerance eliminate need for external reference buffers in constrained SWaP-C designs. |
| Defense Radar Signal Conditioning | Ruggedized Industrial PLC I/O Modules |
|
Use Scenario: Digitizing intermediate frequency (IF) signals from phased-array radar receivers under wide temperature and EMI stress. IC Role / Device Role / Timing Role: High-SNR (76 dB typ.) ADC with 22 MHz bandwidth and >79 dB CMRR - preserves dynamic range in noisy RF environments. Use Value: True differential input mode and 72 dB channel-to-channel isolation suppress common-mode interference from switching power supplies and RF leakage. |
Use Scenario: Modular analog input cards for factory automation PLCs requiring mixed-range sensor support (4–20 mA, ±10 V, thermocouple). IC Role / Device Role / Timing Role: Configurable 8-channel front-end enabling field-reprogrammable input types without hardware changes. Use Value: Software-selectable ranges and pseudo-differential capability reduce BOM count and simplify PCB layout versus discrete range-switching solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 | 18-bit resolution, 1 MSPS, ±10 V fixed range only, no true bipolar software selection; requires external reference for full accuracy. | Better suited for high-precision static measurements (e.g., metrology), not mixed-range dynamic acquisition. | Select AD7327TRUZ-EP-RL7 when per-channel range flexibility, true bipolar software control, and military temperature compliance are mandatory. |
| ADS8688IPWR | 16-bit, 500 kSPS, integrated PGA, but limited to −2.5 V to +2.5 V input range with external scaling; commercial temp only (−40°C to +125°C). | Targets cost-sensitive industrial automation, lacks AQEC qualification and extended military temperature support. | Choose AD7327TRUZ-EP-RL7 for defense/aerospace programs requiring −55°C startup, controlled baseline, and full ±10 V direct interfacing. |
Compared with AD7606C-18 and ADS8688IPWR, AD7327TRUZ-EP-RL7 uniquely combines software-selectable true bipolar ranges, AQEC-enhanced reliability, and iCMOS® high-voltage robustness - making it the only option qualified for mission-critical analog acquisition where range agility and environmental resilience are non-negotiable.
Availability
AD7327TRUZ-EP-RL7 is available at Aetrix Electronics and suitable for defense avionics, spacecraft telemetry, radar signal conditioning, and ruggedized industrial PLC I/O modules requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for AD7327TRUZ-EP-RL7 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, serving precision instrumentation, aerospace, and industrial markets since 1965.
The AD7327-EP product line was designed specifically for defense and aerospace applications requiring extended temperature operation, controlled manufacturing, and AQEC qualification - delivering high-voltage, multi-channel data acquisition in harsh environments.
FAQ
What is the maximum analog input voltage range supported by the AD7327TRUZ-EP-RL7?
The AD7327TRUZ-EP-RL7 supports software-selectable input ranges of ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V when using the internal 2.5 V reference. With an external 3.0 V reference and minimum ±12 V supplies (VDD/VSS), it can accept true bipolar ±12 V inputs. Absolute maximum analog input is VSS − 0.3 V to VDD + 0.3 V per the datasheet absolute ratings table.
Does the AD7327TRUZ-EP-RL7 require external decoupling capacitors, and if so, where?
Yes, the AD7327TRUZ-EP-RL7 requires specific decoupling: a 680 nF capacitor between REFIN/OUT and AGND for reference stability; 10 µF tantalum or ceramic capacitors on VDD and VSS near the package; and 100 nF ceramic capacitors on VCC and VDRIVE referenced to DGND and AGND respectively. These are mandatory to meet specified SNR, THD, and PSRR performance across temperature.
How does the channel sequencer in the AD7327TRUZ-EP-RL7 operate, and can it be disabled?
The AD7327TRUZ-EP-RL7 channel sequencer automatically cycles through enabled channels (VIN0–VIN7) in ascending order upon consecutive conversions, controlled by the SEQ bit in the control register. It can be disabled by setting SEQ = 0, reverting to manual channel selection via ADD2–ADD0 bits. Sequencing supports both continuous and burst modes, with no host intervention needed during operation.
Is the AD7327TRUZ-EP-RL7 pin-compatible with the commercial-grade AD7327TRUZ?
No - while both share identical pinout and electrical functionality, AD7327TRUZ-EP-RL7 is an Enhanced Product variant qualified to −55°C to +125°C with AQEC-controlled manufacturing, different wafer lot controls, and extended reliability testing. The commercial AD7327TRUZ is rated only from −40°C to +85°C and lacks military-grade documentation and traceability.
What serial interface protocols does the AD7327TRUZ-EP-RL7 support, and what is the required SCLK frequency for 500 kSPS operation?
The AD7327TRUZ-EP-RL7 supports SPI®, QSPI™, DSP-, and MICROWIRE™-compatible interfaces using CS, SCLK, DIN, and DOUT. For 500 kSPS throughput, SCLK must run at 10 MHz (maximum), as each conversion requires exactly 16 SCLK cycles - resulting in a 1.6 µs conversion time and guaranteed timing compliance per Table 2 in the Rev. C datasheet.
AD7327TRUZ-EP-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- -
AD7327TRUZ-EP-RL7 FAQ
1.How can I place an order for AD7327TRUZ-EP-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7327TRUZ-EP-RL7 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 AD7327TRUZ-EP-RL7 reliable?
The price and inventory of AD7327TRUZ-EP-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7327TRUZ-EP-RL7 is usually 5 days.
3.What payment methods are accepted for AD7327TRUZ-EP-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7327TRUZ-EP-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7327TRUZ-EP-RL7?
AD7327TRUZ-EP-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7327TRUZ-EP-RL7 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 AD7327TRUZ-EP-RL7?
For technical support, including AD7327TRUZ-EP-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7327TRUZ-EP-RL7 requirements.
6.How does Aetrix verify that AD7327TRUZ-EP-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7327TRUZ-EP-RL7 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 AD7327TRUZ-EP-RL7 meets industry standards.
7.What is the process for return or replacement of AD7327TRUZ-EP-RL7?
All AD7327TRUZ-EP-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7327TRUZ-EP-RL7, 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 AD7327TRUZ-EP-RL7 part is unused and in its original packaging.
Return procedure for AD7327TRUZ-EP-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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