My Inquiry
My Account
Analog Devices Inc. AD7091R-4BCPZ
- Part No.:
- AD7091R-4BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7091R-4BCPZ.pdf
- Description:
- IC ADC 12BIT SAR 20LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:646
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7091R-4BCPZ from Analog Devices is a 4-channel, 12-bit, 1 MSPS successive approximation ADC optimized for ultralow-power battery-operated systems. It integrates an on-chip 2.5 V reference (5 ppm/°C drift), programmable channel sequencer, and SPI-compatible interface. Key confirmed specs: 70 dB SNR at 10 kHz, ±0.7 LSB typical INL, 1.4 mW power at 3 V/1 MSPS, and −40°C to +125°C operation.
For engineers reviewing the AD7091R-4BCPZ datasheet, AD7091R-4BCPZ pinout, AD7091R-4BCPZ application, or AD7091R-4BCPZ equivalent, this page delivers verified electrical parameters, validated 20-lead LFCSP pin functions, real-world use cases in medical monitoring and optical sensing, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The AD7091R-4BCPZ implements a true SAR architecture with no pipeline latency, enabling deterministic 1 MSPS throughput and sub-microsecond conversion time (600 ns). Its integrated channel sequencer supports preprogrammed scan order across four single-ended inputs, while MUXOUT/ADCIN pins allow external signal conditioning before acquisition.
Power management is hardware- and register-controlled: normal mode delivers full performance at 1.4–3.4 mW depending on supply, while power-down mode draws only 435 nA at 3 V. The dual-supply design separates analog (VDD) and digital I/O (VDRIVE) domains, supporting 1.8 V to 5.25 V logic levels independent of the 2.7–5.25 V analog rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = 610 µV at 2.5 V reference, sufficient for precision sensor digitization. |
| Throughput Rate | 1 MSPS - enables real-time sampling of signals up to 500 kHz (Nyquist), with zero pipeline delay. |
| SNR / THD | 70 dB / −80 dB at 10 kHz - supports high-fidelity acquisition of audio-band and instrumentation signals. |
| INL | ±0.7 LSB typical - ensures monotonicity and <0.017% full-scale linearity error for calibration-critical applications. |
| Reference | On-chip 2.5 V ±10 mV, 5 ppm/°C drift - eliminates external reference component and reduces BOM count. |
| Power (Normal Mode) | 1.4 mW at 3 V/1 MSPS - extends battery life in portable devices beyond 100 hours at 1 kSPS duty cycling. |
| Power (Power-Down) | 435 nA at 3 V - enables microamp-level sleep states ideal for wake-on-event sensor nodes. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, industrial control, and downhole equipment. |
Pinout & Package
AD7091R-4BCPZ is packaged in a 20-lead, 4 mm × 4 mm LFCSP (Lead Frame Chip Scale Package) with exposed pad. This RoHS-compliant, thermally enhanced package supports high-density PCB layouts and efficient heat dissipation in compact systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low SPI frame sync; enables serial bus and controls SDO output timing. |
| CONVST | Convert Start Input | Falling-edge-triggered command initiating hold mode and conversion sequence. |
| MUXOUT | Multiplexer Output | Provides buffered analog multiplexer output; connects directly to ADCIN or external filter/amplifier. |
| ADCIN | ADC Track-and-Hold Input | Direct access point to internal sampling capacitor; critical for minimizing charge kickback errors. |
| ALERT/BUSY/GPO0 | Configurable Digital Output | Programmable as interrupt (ALERT), conversion status (BUSY), or general-purpose output (GPO0). |
| GPO1 | General-Purpose Output | Dedicated digital output for system signaling, LED control, or peripheral enable/disable. |
| VIN0–VIN3 | Analog Input Channels | Four single-ended inputs (0–3), each with 10 pF acquisition capacitance and ≤100 Ω mux resistance. |
| REFIN/REFOUT | Reference I/O | 2.5 V internal reference output or external reference input (1.0 V to VDD range). |
| VDD / VDRIVE | Independent Supplies | VDD powers analog core (2.7–5.25 V); VDRIVE sets I/O voltage (1.8–5.25 V), enabling mixed-voltage interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Channel Sequencer | Preprogrammable scan order across all 4 inputs eliminates host MCU overhead for multi-channel polling. |
| Daisy-Chain Mode | Enables cascading multiple AD7091R-4BCPZ devices on one SPI bus, reducing GPIO and routing complexity. |
| On-Chip 2.5 V Reference | 5 ppm/°C drift and 2.5 V ±10 mV accuracy reduce external component count and improve system-level temperature stability. |
| Flexible Power Management | Hardware-selectable normal/power-down modes plus register-controlled ALERT/BUSY/GPO0 functionality simplify low-power firmware design. |
| Wide Supply Range | Independent 2.7–5.25 V analog (VDD) and 1.8–5.25 V digital (VDRIVE) rails support direct interfacing with 1.8 V, 3.3 V, and 5 V controllers. |
| High Channel Isolation | −95 dB crosstalk enables simultaneous measurement of disparate signals (e.g., current + voltage) without mutual interference. |
Applications
| Portable Medical Monitoring | Industrial Sensor Hub |
|---|---|
Use Scenario: Continuous acquisition of ECG, temperature, and SpO₂ signals in handheld patient monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: 4-channel ADC digitizes analog front-end outputs with synchronized sampling, using built-in sequencer to cycle channels at 1 kSPS per channel. Use Value: 435 nA power-down current extends battery life to >1 year; on-chip 2.5 V reference ensures stable scaling across temperature without calibration drift. | Use Scenario: Multi-sensor data acquisition node in factory automation, measuring pressure, humidity, vibration, and ambient light. IC Role / Device Role / Timing Role: Central ADC interfaces with analog sensor outputs via MUXOUT/ADCIN path; ALERT pin triggers MCU wake-up on out-of-range readings. Use Value: −95 dB channel isolation prevents cross-talk between high-gain pressure and low-level optical signals; 125°C rating supports deployment near motors or drives. |
| Optical Sensor Interface | Battery-Powered Diagnostic Tool |
Use Scenario: Digitizing photodiode and phototransistor outputs in portable spectrometers or pulse oximeters. IC Role / Device Role / Timing Role: ADC captures fast transient optical pulses with 1 MSPS throughput and 600 ns conversion time, using BUSY signal for precise timing alignment. Use Value: 70 dB SNR preserves dynamic range for weak optical signals; 10 pF input capacitance minimizes loading on high-impedance transimpedance amplifier outputs. | Use Scenario: Field-deployable equipment diagnostic tool logging voltage, current, and temperature across multiple test points. IC Role / Device Role / Timing Role: Configured in daisy-chain mode with three AD7091R-4BCPZ units to acquire 12 channels over single SPI bus, reducing wiring and controller pin count. Use Value: 1.4 mW active power enables continuous logging for >8 hours on 2000 mAh Li-ion; GPO1 pins drive status LEDs without external drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel, low-power SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7091R-2BCPZ | 2-channel variant in same 20-lead LFCSP; identical specs except channel count and absence of ALERT/BUSY/GPO0 pins. | Suitable where only two analog inputs are required; lacks configurable alert/status outputs needed for autonomous monitoring. | Select when BOM cost reduction is prioritized over channel flexibility and system-level event signaling. |
| ADS7953IRHBT | Texas Instruments 12-bit, 1 MSPS, 16-channel SAR ADC in 32-pin QFN; higher channel count but 3.5 mW active power at 3 V and no integrated reference. | Requires external 2.5 V reference and more PCB area; better suited for high-channel-count industrial PLCs than space-constrained portable devices. | Choose when expanding beyond 4 channels is anticipated and board space allows larger package and extra components. |
Compared with AD7091R-4BCPZ, AD7091R-2BCPZ saves cost and layout area but sacrifices channel scalability and system-level alerting capability, while ADS7953IRHBT offers greater channel density at the expense of higher power and increased design complexity due to external reference dependency.
Availability
AD7091R-4BCPZ is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and industrial sensor hubs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD7091R-4BCPZ 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.
The AD7091R-4BCPZ belongs to the AD7091R family of ultralow-power, multichannel SAR ADCs designed specifically for energy-constrained, high-accuracy data acquisition in portable and harsh-environment applications.
FAQ
What is the maximum sampling rate of the AD7091R-4BCPZ?
The AD7091R-4BCPZ achieves a maximum throughput rate of 1 MSPS with no pipeline latency. This is confirmed in the datasheet's Specifications table (Rev. D, Page 3) and enabled by its SAR architecture and 600 ns conversion time. At this rate, the device consumes 1.4 mW from a 3 V supply, making it suitable for high-speed, low-power applications such as portable diagnostics and real-time sensor monitoring.
Does the AD7091R-4BCPZ include an internal voltage reference?
Yes, the AD7091R-4BCPZ integrates a precise 2.5 V reference with 5 ppm/°C typical drift and ±10 mV initial accuracy at 25°C. This reference is accessible via the REFIN/REFOUT pin and can be used directly or overdriven with an external source from 1.0 V to VDD. Its inclusion eliminates the need for an external reference IC in most designs, reducing BOM cost and board area.
How many analog input channels does the AD7091R-4BCPZ support?
The AD7091R-4BCPZ supports four single-ended analog input channels (VIN0 to VIN3), as explicitly defined in the General Description and Pin Function Descriptions (Rev. D, Pages 1 and 9). It belongs to the AD7091R-2/AD7091R-4/AD7091R-8 family, where the "-4" suffix denotes the 4-channel configuration. Each channel features matched offset and gain error for consistent multi-sensor measurements.
What package type is used for the AD7091R-4BCPZ?
The AD7091R-4BCPZ uses a 20-lead, 4 mm × 4 mm LFCSP (Lead Frame Chip Scale Package) with exposed pad, as specified in the Ordering Guide and Pin Configurations sections (Rev. D, Pages 38 and 9). This package provides excellent thermal performance (θJA = 49.05°C/W) and compact footprint, ideal for space-constrained portable electronics and industrial modules.
Can the AD7091R-4BCPZ operate from a 1.8 V digital interface supply?
Yes, the AD7091R-4BCPZ supports VDRIVE from 1.8 V to 5.25 V, allowing direct interfacing with 1.8 V logic controllers. However, the datasheet clarifies that while functional at 1.8 V, the device cannot achieve 1 MSPS throughput below 2.7 V VDRIVE (Table 1, Note 4). For full-speed operation, VDRIVE must be ≥2.7 V, but low-voltage standby and communication remain viable at 1.8 V.
What is the purpose of the ALERT/BUSY/GPO0 pin on the AD7091R-4BCPZ?
The ALERT/BUSY/GPO0 pin is a multifunction terminal configured via the on-chip configuration register. As ALERT, it asserts when a conversion result exceeds user-defined high/low limits; as BUSY, it indicates active conversion; as GPO0, it serves as a software-controllable digital output. This flexibility reduces external logic and simplifies autonomous monitoring in battery-powered systems using the AD7091R-4BCPZ.
AD7091R-4BCPZ 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:
- 4
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.09V ~ 5.25V
- Voltage - Supply, Digital:
- 2.09V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7091R-4BCPZ FAQ
1.How can I place an order for AD7091R-4BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7091R-4BCPZ 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 AD7091R-4BCPZ reliable?
The price and inventory of AD7091R-4BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7091R-4BCPZ is usually 5 days.
3.What payment methods are accepted for AD7091R-4BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7091R-4BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7091R-4BCPZ?
AD7091R-4BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7091R-4BCPZ 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 AD7091R-4BCPZ?
For technical support, including AD7091R-4BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7091R-4BCPZ requirements.
6.How does Aetrix verify that AD7091R-4BCPZ is sourced from the original manufacturer or authorized distributors?
All AD7091R-4BCPZ 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 AD7091R-4BCPZ meets industry standards.
7.What is the process for return or replacement of AD7091R-4BCPZ?
All AD7091R-4BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7091R-4BCPZ, 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 AD7091R-4BCPZ part is unused and in its original packaging.
Return procedure for AD7091R-4BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7091R-4BCPZ 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…
