My Inquiry
My Account
Analog Devices Inc. AD7291TCPZ-EP
- Part No.:
- AD7291TCPZ-EP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7291TCPZ-EP.pdf
- Description:
- IC ADC 12BIT SAR 20LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:192
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7291TCPZ-EP from Analog Devices is a radiation-tolerant, 12-bit SAR ADC with integrated temperature sensor, 8 single-ended analog input channels (0 V to 2.5 V range), I²C interface, and −55°C to +125°C extended temperature operation. It delivers 22.22 kSPS throughput, ±1°C typical temperature accuracy, and 71 dB SNR for precision monitoring in harsh-environment avionics and defense systems.
For engineers reviewing the AD7291TCPZ-EP datasheet, AD7291TCPZ-EP pinout, AD7291TCPZ-EP application, or AD7291TCPZ-EP equivalent, key selection criteria include its EP-grade qualification (AQEC), autocycle mode sequencing, ALERT out-of-range interrupt, internal 2.5 V reference with ±0.3% tolerance, and dual supply support (VDD = 2.8–3.6 V, VDRIVE = 1.65–3.6 V).
Technical Context
The AD7291TCPZ-EP integrates an 8-channel analog multiplexer, track-and-hold amplifier (30 MHz full-power bandwidth), and 12-bit successive approximation register core with on-chip temperature sensor digitized at 0.25°C resolution. Its I²C interface supports both standard (100 kHz) and fast (400 kHz) modes, enabling direct connection to microcontrollers without level-shifting.
Conversion control operates in command mode (I²C write-triggered) or autocycle mode (software-configurable channel sequence), while programmable high/low limit registers drive the open-drain ALERT output as a hardware interrupt-critical for real-time fault detection in safety-critical platforms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR architecture ensures monotonicity and guaranteed no missing codes for accurate voltage and temperature quantization. |
| Analog Input Range | 0 V to 2.5 V per channel enables direct interfacing with industrial sensors and signal-conditioning stages without external scaling. |
| Temperature Accuracy | ±1°C typical over −55°C to +85°C allows precise thermal management in aerospace power modules and motor controllers. |
| Throughput Rate | 22.22 kSPS at 400 kHz I²C clock supports high-speed multi-channel monitoring in real-time control loops. |
| Power Consumption | 3.5 mA typical active current and 13 µA max full power-down current enable low-power telemetry and battery-backed subsystems. |
| Reference Voltage | Internal 2.5 V ±0.3% reference eliminates need for external precision reference unless higher accuracy or external sourcing is required. |
| Operating Temperature | −55°C to +125°C extended range meets MIL-PRF-38535 Class K and AQEC requirements for space and defense electronics. |
Pinout & Package
AD7291TCPZ-EP uses a 20-lead LFCSP package (CP-20-8), 4 mm × 4 mm body, 0.75 mm height, with exposed paddle soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN7 | Analog Input Channels | Eight single-ended inputs referenced to GND1; unused channels must be tied to GND1 to prevent noise coupling. |
| GND1 | Analog Reference Ground | Isolated ground for internal reference and analog circuitry; must be decoupled to VREF via 10 µF capacitor and kept within 0.3 V of other grounds. |
| VREF | Reference I/O | Provides buffered 2.5 V internal reference or accepts 2.0–2.5 V external reference; requires 10 µF decoupling to GND1. |
| DCAP | LDO Decoupling | Connects to 1 µF capacitor to stabilize internal low-dropout regulator supplying analog core. |
| VDD | Main Supply | 2.8–3.6 V analog/digital supply requiring 10 µF + 100 nF decoupling to GND for noise immunity. |
| VDRIVE | I/O Logic Supply | Sets logic threshold for SDA/SCL (1.65–3.6 V); must not exceed VDD by >0.3 V and requires local decoupling. |
| AS0/AS1 | I²C Address Select | Two-pin binary encoding selects one of four unique I²C addresses (0x28–0x2B) to avoid bus conflicts. |
| ALERT | Open-Drain Interrupt | Active-low hardware interrupt triggered when conversion result exceeds programmed DATAHIGH/DATALOW limits. |
| SDA/SCL | I²C Bidirectional Bus | Open-drain data/clock lines requiring external pull-ups; compatible with 100 kHz and 400 kHz I²C timing budgets. |
| PD/RST | Power-Down Control | Pulse <100 ns to reset; hold >100 ns to enter full power-down (≤13 µA), requiring analog inputs at 0 V before entry. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Temperature Sensor | High-accuracy band gap sensor digitized by same 12-bit ADC core, delivering 0.25°C resolution and ±1°C typical error across full military temperature range. |
| Programmable Channel Sequencer | Software-configurable scan order across all 8 analog inputs enables deterministic acquisition sequences without host CPU intervention. |
| Out-of-Range Alert Function | Dedicated ALERT pin asserts asynchronously when any channel or temperature reading violates user-defined high/low thresholds stored in DATALOW/DATAHIGH registers. |
| Autocycle Mode | Self-timed conversion loop cycles through selected channels automatically, reducing I²C traffic and host processing load in continuous monitoring applications. |
| Enhanced Product Qualification | Fully qualified to AQEC standards with controlled manufacturing baseline, single fab/test site, and product change notification-ensuring long-term supply stability for defense programs. |
Applications
| Aerospace Power Monitoring | Defense Radar Thermal Management |
|---|---|
Use Scenario: Real-time voltage and temperature monitoring of DC-DC converters and FPGAs in satellite power distribution units. IC Role / Device Role / Timing Role: Simultaneous 8-channel analog sensing and on-die temperature measurement with I²C readout for system health telemetry. Use Value: Eliminates discrete temperature sensor and external ADC, reducing BOM count and board area while meeting MIL-STD-883 Class B reliability requirements. | Use Scenario: Thermal profiling of GaN RF power amplifiers and T/R modules in phased-array radar transceivers operating at −40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-accuracy temperature digitization (±1°C) synchronized with analog supply rail monitoring to trigger dynamic derating or cooling control. Use Value: Enables closed-loop thermal protection using ALERT interrupt to reduce RF output power before junction temperature exceeds safe limits. |
| Avionics Flight Control Sensors | Tactical Vehicle Battery Management |
Use Scenario: Redundant voltage and temperature sampling of inertial measurement unit (IMU) analog front-end supplies and MEMS gyroscope bias rails. IC Role / Device Role / Timing Role: Precision 12-bit ADC with internal reference and sequencer provides deterministic, time-aligned measurements across multiple critical analog nodes. Use Value: Supports DO-254 Level A certification by eliminating external reference drift and providing traceable, calibrated temperature data for flight software health checks. | Use Scenario: Monitoring of 12 V lead-acid and Li-ion battery packs in armored ground vehicles, including cell voltage, pack temperature, and auxiliary sensor inputs. IC Role / Device Role / Timing Role: Multi-channel analog acquisition with ALERT-driven fault signaling for overvoltage, undervoltage, and thermal runaway conditions. Use Value: Reduces reliance on microcontroller ADC peripherals, freeing CPU resources for real-time battery state-of-charge estimation and CAN bus communication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel ADC with temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7291BCPZ-RL7 | Commercial-grade version; −40°C to +85°C operating range, no AQEC qualification or extended temp testing. | Not suitable for space or defense deployments requiring −55°C startup or radiation-hardened supply chain. | Select AD7291TCPZ-EP only when AQEC compliance, extended temperature, or product continuity assurance is mandatory. |
| MAX11613ETL+T | 12-bit, 8-channel I²C ADC with internal reference but no integrated temperature sensor; ±2°C external sensor accuracy. | Lacks on-die thermal sensing, requiring separate sensor placement and calibration, increasing layout complexity and error sources. | Choose MAX11613ETL+T if temperature monitoring is secondary and cost sensitivity outweighs integration benefits. |
Compared with AD7291BCPZ-RL7, the AD7291TCPZ-EP adds −55°C cold-start capability, AQEC-controlled manufacturing, and lifetime supply assurance-critical for mission-critical platforms. Versus MAX11613ETL+T, it integrates temperature sensing with ±1°C accuracy, eliminating external components and calibration overhead for thermal-aware systems.
Availability
AD7291TCPZ-EP is available at Aetrix Electronics and suitable for aerospace power monitoring, defense radar thermal management, and avionics flight control sensor systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7291TCPZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and defense markets.
The AD7291-EP product line delivers radiation-tolerant, extended-temperature data acquisition ICs designed specifically for aerospace, defense, and high-reliability embedded systems where supply chain integrity and long-term availability are non-negotiable.
FAQ
What is the operating temperature range of the AD7291TCPZ-EP?
The AD7291TCPZ-EP is specified for −55°C to +125°C operation, fully qualified to AQEC standards for defense and aerospace applications. This extended range enables reliable performance in spacecraft thermal vacuum environments, jet engine-mounted electronics, and arctic-deployed tactical systems-unlike commercial variants limited to −40°C to +85°C.
Does the AD7291TCPZ-EP require an external reference voltage?
No, the AD7291TCPZ-EP includes an internal 2.5 V reference with ±0.3% tolerance at 25°C and 12 ppm/°C temperature coefficient. The VREF pin can be used to buffer this reference externally or accept a 2.0–2.5 V external source if higher accuracy or system-level reference sharing is needed-making the AD7291TCPZ-EP functional without external references in most designs.
How does the ALERT function work on the AD7291TCPZ-EP?
The ALERT pin on the AD7291TCPZ-EP is an open-drain output that asserts low when any conversion result-whether from VIN0–VIN7 or the internal temperature sensor-exceeds user-programmed high (DATAHIGH) or low (DATALOW) thresholds. This hardware interrupt eliminates polling overhead and enables immediate fault response in safety-critical systems using the AD7291TCPZ-EP.
Can the AD7291TCPZ-EP operate with different logic and analog supply voltages?
Yes, the AD7291TCPZ-EP supports independent VDD (2.8–3.6 V) and VDRIVE (1.65–3.6 V) supplies, allowing I²C interface compatibility with 1.8 V or 3.3 V microcontrollers while maintaining full analog performance. VDRIVE must not exceed VDD by more than 0.3 V, and both supplies require dedicated decoupling per the AD7291TCPZ-EP datasheet layout guidelines.
What package type and mounting requirements apply to the AD7291TCPZ-EP?
The AD7291TCPZ-EP uses a 20-lead LFCSP (CP-20-8) package with a 4 mm × 4 mm body and 0.75 mm height. Its exposed metal paddle must be soldered to a solid PCB ground plane using ≥9 thermal vias for optimal thermal dissipation, EMI suppression, and reference stability-per JEDEC MO-220-WGGD-11 standards and Analog Devices' recommended layout for the AD7291TCPZ-EP.
AD7291TCPZ-EP 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):
- 22.22k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- I2C
- 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:
- -55°C ~ 125°C (TA)
- Supplier Device Package:
- 20-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7291TCPZ-EP FAQ
1.How can I place an order for AD7291TCPZ-EP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7291TCPZ-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 AD7291TCPZ-EP reliable?
The price and inventory of AD7291TCPZ-EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7291TCPZ-EP is usually 5 days.
3.What payment methods are accepted for AD7291TCPZ-EP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7291TCPZ-EP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7291TCPZ-EP?
AD7291TCPZ-EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7291TCPZ-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 AD7291TCPZ-EP?
For technical support, including AD7291TCPZ-EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7291TCPZ-EP requirements.
6.How does Aetrix verify that AD7291TCPZ-EP is sourced from the original manufacturer or authorized distributors?
All AD7291TCPZ-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 AD7291TCPZ-EP meets industry standards.
7.What is the process for return or replacement of AD7291TCPZ-EP?
All AD7291TCPZ-EP units undergo pre-shipment inspection (PSI). If there is an issue with AD7291TCPZ-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 AD7291TCPZ-EP part is unused and in its original packaging.
Return procedure for AD7291TCPZ-EP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7291TCPZ-EP 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…
