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Analog Devices Inc. AD7327BRUZ-REEL
- Part No.:
- AD7327BRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7327BRUZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,858
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Product details
Overview
AD7327BRUZ-REEL from Analog Devices is a 12-bit plus sign (13-bit) successive approximation ADC with true bipolar input capability, 8-channel multiplexing, software-selectable input ranges (±10 V, ±5 V, ±2.5 V, 0 V to +10 V), and 500 kSPS throughput. It integrates a 2.5 V internal reference, channel sequencer, temperature indicator, and SPI-/QSPI-/DSP-/MICROWIRE™-compatible serial interface - deployed in industrial process control, data acquisition systems, and automated test equipment requiring high-voltage analog signal digitization.
For engineers reviewing the AD7327BRUZ-REEL datasheet, AD7327BRUZ-REEL pinout, AD7327BRUZ-REEL application, or AD7327BRUZ-REEL equivalent, key selection criteria include true bipolar ±10 V input support, per-channel range programmability, differential/single-ended/pseudo-differential configuration flexibility, low 18 mW power at full speed, and TSSOP-20 packaging with iCMOS™ high-voltage process compatibility.
Technical Context
The AD7327BRUZ-REEL implements a 13-bit SAR architecture with integrated track-and-hold, channel sequencer, and programmable analog input structure supporting eight single-ended, four true differential, or seven pseudo-differential configurations. Its iCMOS™ process enables ±16.5 V analog supply operation while maintaining submicron CMOS logic compatibility.
It features dual ground domains (AGND/DGND), independent VDRIVE for logic-level flexibility, REFIN/OUT pin supporting internal 2.5 V reference or external 2.5–3.0 V reference, and four power modes (Normal, Autostandby, Autoshutdown, Full Shutdown) with <1 µA quiescent current in shutdown states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit plus sign (13-bit effective), enabling unambiguous representation of bipolar signals across full-scale ranges |
| Throughput Rate | 500 kSPS maximum - supports real-time sampling of signals up to 22 MHz full-power bandwidth |
| 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-range systems |
| Analog Supply | VDD = +12 V to +16.5 V, VSS = −12 V to −16.5 V - enables direct interfacing with ±10 V industrial sensors and PLC outputs |
| Reference | Internal 2.5 V ±10 mV (25 ppm/°C TC); external reference support up to 3.0 V - allows ±12 V input range with 3 V reference |
| Power Dissipation | 18 mW at 500 kSPS (VDD/VSS = ±16.5 V, VCC/VDRIVE = 5.25 V) - suitable for thermally constrained embedded DAQ modules |
| INL / DNL | ±1.1 LSB / −0.9/+1.2 LSB (differential mode); guaranteed no missing codes to 13 bits - ensures monotonicity in closed-loop control feedback paths |
Pinout & Package
AD7327BRUZ-REEL is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin assignments are validated per Analog Devices Rev. B datasheet Figure 3 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-low frame sync for serial interface; initiates conversion and enables DOUT three-state output |
| DIN (Pin 2) | Serial Data Input | Accepts register write commands on SCLK falling edge; used for control, sequence, and range register programming |
| DGND (Pins 3, 19) | Digital Ground | Reference for all digital I/O; must be within ±0.3 V of AGND to prevent noise coupling into analog section |
| AGND (Pin 4) | Analog Ground | Reference for analog inputs, reference circuitry, and internal ADC core; star-point grounding critical for SNR integrity |
| REFIN/OUT (Pin 5) | Reference I/O | Provides 2.5 V internal reference or accepts 2.5–3.0 V external reference; requires 680 nF decoupling capacitor |
| VIN0–VIN7 (Pins 7, 10–12, 14, 16–18) | Analog Inputs | Eight configurable inputs supporting single-ended, true differential, or pseudo-differential topologies per channel |
| VDD (Pin 15) | Positive Analog Supply | +12 V to +16.5 V supply for analog front-end; minimum ±10 V required for ±10 V input range |
| VCC (Pin 16) | ADC Core Supply | +2.7 V to +5.25 V supply for SAR core and logic; decoupled to AGND |
| VDRIVE (Pin 17) | Logic Interface Supply | +2.7 V to +5.25 V determines I/O voltage level; may differ from VCC but must not exceed it by >0.3 V |
| DOUT (Pin 18) | Serial Data Output | MSB-first 16-bit stream (3 address + 1 sign + 12 data bits); three-state controlled by CS |
| SCLK (Pin 20) | Serial Clock | Master clock for data transfer and conversion timing; supports up to 10 MHz operation |
Key Features
| Feature | Design Value |
|---|---|
| True bipolar input architecture | Supports ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V ranges without external op-amp level-shifting or gain stages |
| Per-channel input range selection | Each of eight channels independently programmed via dedicated range registers - enables mixed-signal acquisition in single IC |
| Configurable analog input topology | Single-ended, true differential, or pseudo-differential modes selectable per channel - optimizes noise rejection and dynamic range |
| Integrated temperature indicator | On-chip sensor provides calibrated die temperature readback via dedicated register - aids thermal derating in sealed enclosures |
| iCMOS™ high-voltage process | Enables ±16.5 V analog supplies with 5 V logic compatibility - reduces system-level isolation requirements vs. legacy bipolar processes |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous monitoring of 4–20 mA loop transmitters, thermocouple outputs, and ±10 V PLC analog I/O in factory automation cabinets. IC Role / Device Role / Timing Role: Primary 8-channel ADC digitizing mixed-range field signals with per-channel range auto-scaling and channel sequencing. Use Value: Eliminates need for external signal conditioners and range-switching relays, reducing BOM count and PCB area in DIN-rail mounted DAQ modules. |
Use Scenario: High-speed parametric testing of analog components (op-amps, filters, sensors) requiring synchronized multi-channel stimulus/response capture. IC Role / Device Role / Timing Role: Precision digitizer capturing true differential responses at 500 kSPS with <50 ps aperture jitter for THD/SINAD validation. Use Value: Enables single-shot 4096-point FFT analysis with 76 dB SNR in differential mode - meets IEEE 1057 Class A compliance thresholds. |
| Energy Metering Front-End | Motor Drive Current Sensing |
Use Scenario: Simultaneous sampling of voltage and current waveforms across multiple phases in polyphase energy meters with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Dual-role ADC acquiring voltage (±10 V) and shunt-based current (±2.5 V) channels with matched gain error (<±0.5 LSB) and offset match (<±0.6 LSB). Use Value: Achieves <0.1% active energy accuracy over temperature via per-channel calibration registers and internal reference stability (25 ppm/°C). |
Use Scenario: Real-time phase current feedback in servo drives using isolated amplifiers with ±5 V outputs feeding motor control FPGAs. IC Role / Device Role / Timing Role: High-bandwidth (22 MHz full-power BW) ADC capturing fast transient currents during commutation events at 500 kSPS. Use Value: Supports field-oriented control (FOC) algorithms with <305 ns acquisition time and <7 ns aperture delay - minimizes current estimation latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel, software-configurable ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7329BRUZ | 1000 kSPS throughput, identical 12-bit-plus-sign resolution, same pinout and register map | Higher-speed data logging and real-time spectral analysis where >500 kSPS is required | Select AD7329BRUZ when system sampling rate exceeds 500 kSPS; retains full software compatibility and layout reuse |
| AD7323BRUZ | 4-channel variant, same 500 kSPS rate and input range flexibility, smaller 16-lead TSSOP package | Space-constrained designs needing fewer channels (e.g., compact sensor nodes, portable instruments) | Choose AD7323BRUZ to reduce footprint and cost where only four analog inputs are required |
Compared with AD7327BRUZ-REEL, AD7329BRUZ doubles throughput without sacrificing DC accuracy or input flexibility, while AD7323BRUZ offers identical performance in half the channel count and package size - enabling scalable DAQ architecture across product tiers.
Availability
AD7327BRUZ-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, energy metering front-ends, and motor drive current sensing requiring stable component supply and long-term production continuity.
Supply support for AD7327BRUZ-REEL 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 and manufacturing facilities worldwide.
The AD7327BRUZ-REEL belongs to Analog Devices' precision data acquisition portfolio, engineered for industrial-grade multichannel digitization where true bipolar input, software-configurable ranges, and high-voltage iCMOS™ integration are essential.
FAQ
What input voltage ranges does the AD7327BRUZ-REEL support, and how are they selected?
The AD7327BRUZ-REEL supports four software-selectable input ranges per channel: ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. Selection is performed by writing to dedicated range registers via the SPI-compatible serial interface. Each of the eight analog inputs can be independently configured, enabling mixed-range acquisition without external hardware reconfiguration. The AD7327BRUZ-REEL requires appropriate VDD/VSS supplies (e.g., ±12 V min for ±10 V range) and uses either its internal 2.5 V reference or an external 2.5–3.0 V reference.
Does the AD7327BRUZ-REEL require external reference circuitry, or is an internal reference sufficient?
The AD7327BRUZ-REEL includes a precision 2.5 V internal reference with ±10 mV initial error and 25 ppm/°C temperature coefficient, which is sufficient for most industrial applications. A 680 nF capacitor is required on the REFIN/OUT pin for stability. However, the AD7327BRUZ-REEL also supports external reference operation - applying a 3.0 V reference enables true bipolar ±12 V input range, provided VDD/VSS ≥ ±12 V. No external buffer or amplifier is needed for either mode.
How does the AD7327BRUZ-REEL handle analog input configuration (single-ended vs. differential)?
The AD7327BRUZ-REEL supports three analog input topologies per channel: single-ended, true differential, and pseudo-differential - selected via Mode bits in the control register. True differential mode uses VINx and VINy pairs (e.g., VIN0/VIN1) for common-mode rejection; pseudo-differential uses VINx and a shared reference (e.g., VIN0/VIN7); single-ended references each input to AGND. All configurations maintain full 12-bit-plus-sign resolution and software-defined range selection.
What power-saving modes does the AD7327BRUZ-REEL offer, and what are their current draws?
The AD7327BRUZ-REEL provides four power modes: Normal (18 mW at 500 kSPS), Autostandby (0.75 mA total at 250 kSPS), Autoshutdown (<1 µA static), and Full Shutdown (<1 µA). Autostandby automatically enters low-power state between conversions; Autoshutdown powers down internal clocks after serial activity; Full Shutdown disables all circuitry. All modes retain register contents and resume operation within microseconds upon wake-up.
Is the AD7327BRUZ-REEL pin-compatible with other devices in the AD732x family?
Yes - the AD7327BRUZ-REEL shares identical pinout and register mapping with AD7329BRUZ (1000 kSPS) and AD7323BRUZ (4-channel, 500 kSPS), enabling drop-in upgrades or downgrades based on channel count and speed requirements. This pin and software compatibility simplifies design reuse across product variants while maintaining consistent layout, decoupling, and firmware architecture for the AD7327BRUZ-REEL and its family members.
AD7327BRUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCMOS®
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2, 3, 4
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- ±12V ~ 16.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- Temperature Sensor, True Bipolar
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7327BRUZ-REEL FAQ
1.How can I place an order for AD7327BRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7327BRUZ-REEL 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 AD7327BRUZ-REEL reliable?
The price and inventory of AD7327BRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7327BRUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7327BRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7327BRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7327BRUZ-REEL?
AD7327BRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7327BRUZ-REEL 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 AD7327BRUZ-REEL?
For technical support, including AD7327BRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7327BRUZ-REEL requirements.
6.How does Aetrix verify that AD7327BRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7327BRUZ-REEL 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 AD7327BRUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7327BRUZ-REEL?
All AD7327BRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7327BRUZ-REEL, 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 AD7327BRUZ-REEL part is unused and in its original packaging.
Return procedure for AD7327BRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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