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Analog Devices Inc. AD7328BRUZ-REEL7
- Part No.:
- AD7328BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7328BRUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:843
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Product details
Overview
AD7328BRUZ-REEL7 from Analog Devices is a 12-bit plus sign (13-bit effective) successive approximation register (SAR) analog-to-digital converter with true bipolar input capability, software-selectable input ranges (±10 V, ±5 V, ±2.5 V, 0 V to +10 V), 1 MSPS throughput rate, and integrated 2.5 V reference - designed for high-precision industrial data acquisition systems requiring channel sequencing and mixed-signal isolation.
For engineers reviewing the AD7328BRUZ-REEL7 datasheet, AD7328BRUZ-REEL7 pinout, AD7328BRUZ-REEL7 application, or AD7328BRUZ-REEL7 equivalent, key selection criteria include true differential/single-ended/pseudo-differential input configuration flexibility, iCMOS® high-voltage analog front-end compatibility (±16.5 V supplies), temperature indicator integration, and SPI-/QSPI-/MICROWIRE™-compatible serial interface timing at up to 20 MHz SCLK.
Technical Context
The AD7328BRUZ-REEL7 implements an iCMOS® process-based SAR architecture with a track-and-hold amplifier, 8-channel analog multiplexer, and programmable channel sequencer. Its analog input structure supports independent per-channel range selection and mode configuration (single-ended, true differential, or pseudo-differential) via internal registers.
It features dual ground domains (AGND/DGND), separate analog (VDD/VSS) and digital (VCC/VDRIVE) supply rails, and a configurable reference path (internal 2.5 V or external up to 3.0 V). Power management includes four operational modes: normal, autostandby, autoshutdown, and full shutdown - enabling dynamic power scaling from 31 mW down to 38.25 µW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit plus sign (13-bit effective); guarantees no missing codes in differential mode (FSR/8192 LSB), 12-bit in single-ended mode (FSR/4096 LSB) |
| Throughput Rate | 1 MSPS maximum; requires VCC ≥ 4.75 V and fSCLK = 20 MHz; drops to 770 kSPS if VCC < 4.75 V |
| Analog Input Ranges | Software-selectable per channel: ±10 V, ±5 V, ±2.5 V, or 0 V to +10 V; ±12 V operation possible with external 3 V reference and ±12 V supplies |
| Dynamic Performance | 76 dB SNR (differential, ±2.5 V/±5 V), −80 dB THD (differential), −80 dB SFDR, 22 MHz full-power bandwidth |
| DC Accuracy | ±1.1 LSB INL (differential), ±1 LSB DNL (differential), ±8 LSB gain error (single-ended), ±0.5 LSB gain error match across channels |
| Power Consumption | 31 mW at 1 MSPS (VDD/VSS = ±16.5 V, VCC/VDRIVE = 5.25 V); 21 mW at VDD/VSS = ±12 V, VCC = 5 V |
| Reference | Internal 2.5 V ±10 mV (TMIN–TMAX), 25 ppm/°C tempco; supports external reference up to 3.0 V on REFIN/OUT pin |
Pinout & Package
AD7328BRUZ-REEL7 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 functions are validated per Analog Devices Rev. C datasheet Figure 3 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low frame signal initiating conversion and serial data transfer; must meet t1 ≥ 5 ns (VCC ≥ 4.75 V) setup/hold timing |
| DIN | Serial Data Input | Loads control, sequence, and range register bits on SCLK falling edge; supports 16-bit command frames |
| AGND / DGND | Analog & Digital Ground | Separate ground pins require ≤ 0.3 V potential difference; critical for noise isolation between analog/digital domains |
| VIN0–VIN7 | Analog Input Channels | Eight inputs configurable as single-ended, true differential (4 pairs), or pseudo-differential (4 or 7 pairs); each independently range-programmable |
| REFIN/OUT | Reference I/O | Provides 2.5 V internal reference output or accepts external 2.5–3.0 V reference; requires 680 nF decoupling capacitor |
| VDD / VSS | Analog Supply Rails | ±12 V to ±16.5 V operation enables true bipolar input handling; VSS must be negative relative to AGND |
| VCC / VDRIVE | Digital Core & Interface Supplies | VCC powers ADC core (2.7–5.25 V); VDRIVE sets logic level (2.7–5.25 V) and may differ from VCC by ≤ 0.3 V |
| DOUT / SCLK | Serial Data Output / Clock | DOUT outputs 16-bit frame (3-bit channel ID + sign + 12-bit data) MSB-first on SCLK falling edge; SCLK up to 20 MHz |
Key Features
| Feature | Design Value |
|---|---|
| True bipolar input support | Accepts ±10 V, ±5 V, ±2.5 V signals without external level-shifting; enabled by iCMOS® high-voltage process |
| Per-channel software-selectable range | Each of eight inputs independently configured via range registers - eliminates external gain-switching circuitry |
| Integrated temperature indicator | On-chip sensor provides real-time die temperature monitoring via dedicated register readout |
| Channel sequencer with auto-increment | Hardware-controlled scan of up to 8 channels without host CPU intervention; reduces firmware overhead in cyclic acquisition |
| Low-power operational modes | Autostandby (1.3 mA), autoshutdown (1 µA), and full shutdown (1 µA) enable adaptive power management in battery or energy-constrained systems |
| SPI-/QSPI-/MICROWIRE™-compatible interface | Standard 3-wire serial protocol with CS, SCLK, DIN/DOUT; supports daisy-chain configuration for multi-ADC systems |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
|
Use Scenario: Continuous voltage/current monitoring of PLC I/O modules, motor drives, and sensor transmitters in factory automation. IC Role / Device Role / Timing Role: Primary ADC for isolated analog front-ends, acquiring multiple sensor signals with synchronized sampling and range adaptation. Use Value: True bipolar input eliminates external op-amp level shifters; channel sequencer enables deterministic multi-sensor polling at 1 MSPS without CPU load. |
Use Scenario: High-fidelity waveform capture in portable oscilloscopes, multimeters, and automated test equipment (ATE). IC Role / Device Role / Timing Role: Precision digitizer for DC-coupled analog inputs, supporting both differential probe measurements and unipolar sensor outputs. Use Value: 76 dB SNR and −80 dB THD ensure accurate spectral analysis; 22 MHz full-power bandwidth captures fast transients without aliasing. |
| Energy Metering Systems | Medical Instrumentation |
|
Use Scenario: Voltage and current sampling in polyphase electricity meters compliant with IEC 62053-21/22 standards. IC Role / Device Role / Timing Role: Metrology-grade ADC for anti-aliasing-filtered CT/PT secondary signals, operating with ±5 V or ±10 V ranges. Use Value: ±0.5 LSB gain error match ensures channel-to-channel consistency across phases; low 31 mW power aids thermal stability in sealed enclosures. |
Use Scenario: Biopotential signal acquisition in ECG, EEG, and patient monitors requiring high common-mode rejection and low noise. IC Role / Device Role / Timing Role: Front-end digitizer for isolated biopotential amplifiers, leveraging true differential inputs and high CMRR (−79 dB @ 100 kHz). Use Value: −72 dB channel-to-channel isolation prevents crosstalk between lead measurements; temperature indicator supports calibration drift compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit-plus-sign SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7327BRUZ | Same architecture but 500 kSPS max throughput; identical pinout, register map, and input range support | Limited to lower-speed acquisition; suitable where 1 MSPS is unnecessary and power budget is tighter (21 mW at 500 kSPS) | Select AD7327BRUZ when system sampling requirements are ≤ 500 kSPS and cost optimization is prioritized over speed headroom. |
| AD7324BRUZ | 4-channel variant (vs. 8-channel); same 1 MSPS rate, resolution, and iCMOS® process; shares identical register set and interface | Fewer analog inputs required; smaller PCB footprint; reduced channel sequencing complexity | Choose AD7324BRUZ for compact designs needing only four high-precision inputs - avoids unused channel routing and simplifies layout. |
Compared with AD7327BRUZ and AD7324BRUZ, the AD7328BRUZ-REEL7 delivers full 8-channel, 1 MSPS capability in the same TSSOP package - making it optimal for space-constrained, high-channel-count industrial DAQ where throughput and flexibility cannot be compromised.
Availability
AD7328BRUZ-REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, and energy metering systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7328BRUZ-REEL7 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 and ISO 9001-certified manufacturing.
The AD7328BRUZ-REEL7 belongs to Analog Devices' iCMOS® precision SAR ADC product line - engineered for industrial, instrumentation, and energy applications demanding robust bipolar input handling, low power, and high DC/dynamic accuracy.
FAQ
What is the maximum analog input voltage range supported by the AD7328BRUZ-REEL7?
The AD7328BRUZ-REEL7 supports four software-selectable input ranges per channel: ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. With an external 3 V reference applied to REFIN/OUT and minimum ±12 V VDD/VSS supplies, it can accept true bipolar ±12 V inputs - verified in the Rev. C datasheet Table 2 and General Description section.
Does the AD7328BRUZ-REEL7 require an external reference, or does it have an internal one?
The AD7328BRUZ-REEL7 includes an internal 2.5 V reference with ±10 mV accuracy over temperature and 25 ppm/°C drift. It also supports external reference operation via the REFIN/OUT pin (2.5 V to 3.0 V range), allowing higher full-scale precision or custom scaling - confirmed in the Reference section and Table 2 of the datasheet.
How many analog input channels does the AD7328BRUZ-REEL7 support, and what configurations are available?
The AD7328BRUZ-REEL7 supports eight analog input channels (VIN0–VIN7), configurable as eight single-ended inputs, four true differential pairs, four pseudo-differential inputs, or seven pseudo-differential inputs - all programmable per channel via control and mode bits, as detailed in the Functional Block Diagram and Product Highlights sections.
What serial interface protocols is the AD7328BRUZ-REEL7 compatible with?
The AD7328BRUZ-REEL7 features a standard 3-wire SPI-compatible serial interface that operates with SPI®, QSPI™, DSP-, and MICROWIRE™-compliant controllers. It uses CS, SCLK, DIN, and DOUT lines with MSB-first 16-bit framing - explicitly stated in Product Highlights #3 and Serial Interface section of the datasheet.
What power supply voltages are required for the AD7328BRUZ-REEL7 to operate at full specification?
To meet full specifications including 1 MSPS throughput and ±10 V input range, the AD7328BRUZ-REEL7 requires VDD = +12 V to +16.5 V, VSS = −12 V to −16.5 V, VCC = 4.75 V to 5.25 V, and VDRIVE = 2.7 V to 5.25 V - per Table 2 and Absolute Maximum Ratings in the Rev. C datasheet.
AD7328BRUZ-REEL7 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):
- 1M
- Number of Inputs:
- 4, 7, 8
- 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:
- -
AD7328BRUZ-REEL7 FAQ
1.How can I place an order for AD7328BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7328BRUZ-REEL7 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 AD7328BRUZ-REEL7 reliable?
The price and inventory of AD7328BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7328BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7328BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7328BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7328BRUZ-REEL7?
AD7328BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7328BRUZ-REEL7 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 AD7328BRUZ-REEL7?
For technical support, including AD7328BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7328BRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7328BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7328BRUZ-REEL7 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 AD7328BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7328BRUZ-REEL7?
All AD7328BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7328BRUZ-REEL7, 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 AD7328BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7328BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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