My Inquiry
My Account
Analog Devices Inc. AD7298BCPZ
- Part No.:
- AD7298BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7298BCPZ.pdf
- Description:
- IC ADC 12BIT SAR 20LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:460
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7298BCPZ from Analog Devices is a 12-bit, 1 MSPS, 8-channel SAR ADC with integrated band gap temperature sensor, internal 2.5 V reference, and SPI-compatible serial interface. It operates from a single 2.8 V to 3.6 V supply, supports 0 V to 2.5 V analog inputs, and delivers ±1°C temperature accuracy across −40°C to +125°C - used in industrial process monitoring and embedded system health management.
For engineers reviewing the AD7298BCPZ datasheet, AD7298BCPZ pinout, AD7298BCPZ application, or AD7298BCPZ equivalent, key selection considerations include channel sequencer programmability, TSENSE_BUSY timing synchronization, 0.25°C temperature resolution, low-power partial/full power-down modes, and LFCSP-20 package thermal performance for high-density PCB layouts.
Technical Context
The AD7298BCPZ integrates an 8-channel single-ended multiplexer, track-and-hold amplifier (30 MHz full-power bandwidth), and 12-bit successive approximation register core with capacitive DAC architecture. Its on-chip sequencer enables preprogrammed channel cycling without host intervention, and conversion results are output via 4-wire SPI with MSB-first straight-binary coding for voltage channels and two's complement for temperature.
Temperature sensing uses a dedicated band gap sensor digitized by the same ADC core, yielding 0.25°C LSB resolution and ±1°C accuracy over −40°C to +85°C. The device supports dual supply domains: VDD (2.8–3.6 V) for analog/digital core and VDRIVE (1.65–3.6 V) for logic interface level-setting, enabling mixed-voltage system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete steps with guaranteed no missing codes. |
| Throughput Rate | 1 MSPS per analog channel - enables real-time sampling of fast transients in motor control or power monitoring. |
| Analog Input Range | 0 V to 2.5 V - matches internal reference; eliminates need for external scaling in many sensor interfaces. |
| Temperature Accuracy | ±1°C (−40°C to +85°C) - sufficient for board-level thermal margining without calibration. |
| Power Consumption | 6.3 mA typical at 3 V - scales dynamically with throughput; drops to <10 μA in full power-down mode. |
| Reference | Internal 2.5 V ±0.3% - buffered, low-noise (60 μV rms), with 12 ppm/°C tempco; disableable for external reference use. |
| Interface | SPI-compatible 4-wire serial - supports up to 20 MHz SCLK; includes CS framing and TSENSE_BUSY status indicator. |
Pinout & Package
AD7298BCPZ is housed in a 20-lead Lead Frame Chip Scale Package (LFCSP), 4 mm × 4 mm × 0.85 mm, with exposed metal paddle requiring soldering to PCB ground for thermal dissipation and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN7 | Analog Input Channels | Eight single-ended inputs referenced to GND1; accept 0 V to 2.5 V; unused pins must be tied to GND1. |
| GND1 | Analog Reference Ground | Ground reference for internal reference and analog inputs; must be within 0.3 V of GND and decoupled with 10 μF to VREF. |
| VREF | Reference I/O | Outputs 2.5 V internal reference; accepts 2.0–2.5 V external reference when internal ref is disabled. |
| DCAP | LDO Decoupling | Connects to internal LDO output; requires 1 μF decoupling capacitor to GND for stable analog supply. |
| VDD | Analog/Digital Core Supply | 2.8–3.6 V supply; decouple with 10 μF + 100 nF to GND for noise immunity. |
| CS | Chip Select | Active-low edge-triggered input; initiates conversion and enables DOUT; frames serial data transfer. |
| TSENSE_BUSY | Temperature Conversion Status | Open-drain output asserted high during temperature sensor conversion; used for timing synchronization. |
| DIN/DOUT/SCLK | SPI Interface Signals | Standard 4-wire SPI: DIN loads control register, DOUT outputs 16-bit result (4-bit address + 12-bit data), SCLK clocks transfers. |
| VDRIVE | I/O Voltage Level | Sets logic interface voltage (1.65–3.6 V); may differ from VDD but must not exceed it by >0.3 V. |
| PD/RST | Power-Down & Reset | Pulse low (1–100 ns) to reset; hold low to enter full power-down; analog inputs must be at 0 V before entry. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Channel Sequencer | Enables automatic cycling through user-defined channel subsets (e.g., VIN0→VIN3→TSENSE), reducing host CPU overhead in multi-sensor systems. |
| Integrated Temperature Sensor | Band gap sensor digitized by same ADC core, delivering 0.25°C resolution and ±1°C accuracy - eliminates need for external thermal IC in compact designs. |
| Flexible Power Management | Three operational states: normal (6.3 mA), partial power-down (3.3 mA), and full power-down (<10 μA) - selectable via control register and PD/RST pin. |
| High-Speed Track-and-Hold | 30 MHz full-power bandwidth supports accurate sampling of signals beyond audio range, critical for vibration or current-sense applications. |
| Dual-Supply Logic Interface | VDRIVE pin allows independent I/O voltage setting (1.65–3.6 V), enabling direct interfacing with 1.8 V or 3.3 V microcontrollers without level shifters. |
Applications
| Industrial Process Monitoring | Motor Drive Thermal Protection |
|---|---|
Use Scenario: Continuous acquisition of multiple analog sensor outputs (pressure, flow, voltage) and local PCB temperature in PLC backplanes or remote I/O modules. IC Role / Device Role / Timing Role: Central 8-channel data acquisition node with synchronized temperature awareness; TSENSE_BUSY ensures precise timing alignment between thermal and analog reads. Use Value: Reduces BOM count by integrating temperature sensing and multichannel conversion in one 4 mm × 4 mm package, simplifying layout and calibration. |
Use Scenario: Real-time monitoring of IGBT junction temperature and phase current feedback in servo drives and inverters. IC Role / Device Role / Timing Role: Simultaneous sampling of current-sense amplifiers and thermal sensors with 1 MSPS throughput and sub-100 ns aperture jitter. Use Value: Enables fast thermal shutdown response (<100 μs latency for TSENSE channel) while maintaining high-fidelity current waveform capture. |
| Communications Equipment Health Management | Embedded System Board-Level Diagnostics |
Use Scenario: Monitoring power rail voltages, bias currents, and ambient temperature in base station RF modules and optical line cards. IC Role / Device Role / Timing Role: Low-power, high-accuracy sensor hub with programmable sequencing - cycles through 5 voltage rails and temperature every 10 ms. Use Value: Internal 2.5 V reference eliminates external reference drift errors; ±1°C thermal accuracy supports predictive fan control algorithms. |
Use Scenario: On-board diagnostics in medical devices, test equipment, and edge AI gateways requiring runtime validation of supply integrity and thermal margins. IC Role / Device Role / Timing Role: Standalone health monitor interfaced to MCU via SPI; uses PD/RST for autonomous wake-up on thermal threshold breach. Use Value: Full power-down mode draws <10 μA - extends battery life in portable diagnostics tools while retaining rapid reactivation capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC with integrated temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7091R-8BCPZ | 8-channel, 12-bit, 1 MSPS SAR ADC; no integrated temperature sensor; requires external thermal IC. | Lacks on-chip temperature sensing - increases component count and layout complexity for thermal-aware systems. | Select when temperature monitoring is handled separately and lowest possible power (340 μA typical) is prioritized over integration. |
| ADS8688IPWR | 8-channel, 16-bit, 500 kSPS SAR ADC; no integrated temperature sensor; supports ±10 V bipolar inputs via internal PGA. | Higher resolution and wider input range, but lacks monolithic thermal sensing and has lower throughput. | Select for precision measurement of industrial sensors (e.g., 4–20 mA loops) where temperature is monitored externally and 16-bit resolution is mandatory. |
Compared with AD7091R-8BCPZ and ADS8688IPWR, the AD7298BCPZ uniquely combines 12-bit/1 MSPS performance with monolithic temperature sensing and flexible power management - making it optimal for space-constrained, thermally aware embedded systems where integration reduces design risk and time-to-market.
Availability
AD7298BCPZ is available at Aetrix Electronics and suitable for industrial process monitoring, motor drive thermal protection, and communications equipment health management requiring stable component supply and long-term lifecycle support.
Supply support for AD7298BCPZ 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 healthcare markets since 1965.
The AD7298BCPZ belongs to Analog Devices' precision data acquisition product line, designed specifically for compact, low-power, multi-sensor embedded systems requiring integrated thermal awareness and deterministic timing behavior.
FAQ
What is the maximum sampling rate of the AD7298BCPZ for analog voltage channels?
The AD7298BCPZ achieves a maximum throughput rate of 1 MSPS for its eight analog input channels (VIN0–VIN7), with one-cycle latency and 20 MHz SCLK support. This rate assumes operation with the internal 2.5 V reference and VDD = 3 V. The temperature sensor channel operates at a lower 10 kSPS maximum due to longer conversion time (100 μs).
How does the AD7298BCPZ handle temperature measurements?
The AD7298BCPZ incorporates a high-accuracy band gap temperature sensor digitized by its 12-bit SAR ADC core, providing 0.25°C resolution and ±1°C accuracy from −40°C to +85°C. Temperature data is output in two's complement format on the DOUT line, and the TSENSE_BUSY pin signals active conversion - enabling precise timing coordination with analog acquisitions.
Can the AD7298BCPZ operate with an external reference voltage?
Yes, the AD7298BCPZ supports external reference operation: the internal 2.5 V reference can be disabled, and an external voltage between 2.0 V and 2.5 V applied to the VREF pin. When using an external reference, a correction factor may be required for temperature sensor results, as specified in the "Temperature Sensor Averaging" section of the datasheet.
What are the power-down modes available on the AD7298BCPZ?
The AD7298BCPZ offers three power states: Normal Mode (6.3 mA typical), Partial Power-Down Mode (3.3 mA), and Full Power-Down Mode (<10 μA). Partial mode retains reference and logic functionality; full mode disables all circuitry except the PD/RST detection circuit. Entry is controlled via the PPD bit in the control register or by asserting PD/RST low.
Is the AD7298BCPZ pin-compatible with other members of the AD7298 family?
Yes, the AD7298BCPZ shares identical pinout, package (20-lead LFCSP), and functional interface with all variants in the AD7298 family, including AD7298BRUZ (TSSOP-20) and AD7298-5BCPZ (5 V tolerant version). Differences are limited to voltage ratings and minor specification tolerances - no PCB redesign is needed when migrating between these variants.
AD7298BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 8
- Input Type:
- 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:
- 2.8V ~ 3.6V
- Voltage - Supply, Digital:
- 2.8V ~ 3.6V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7298BCPZ FAQ
1.How can I place an order for AD7298BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7298BCPZ 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 AD7298BCPZ reliable?
The price and inventory of AD7298BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7298BCPZ is usually 5 days.
3.What payment methods are accepted for AD7298BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7298BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7298BCPZ?
AD7298BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7298BCPZ 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 AD7298BCPZ?
For technical support, including AD7298BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7298BCPZ requirements.
6.How does Aetrix verify that AD7298BCPZ is sourced from the original manufacturer or authorized distributors?
All AD7298BCPZ 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 AD7298BCPZ meets industry standards.
7.What is the process for return or replacement of AD7298BCPZ?
All AD7298BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7298BCPZ, 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 AD7298BCPZ part is unused and in its original packaging.
Return procedure for AD7298BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7298BCPZ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
