My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1290BCEI+
- Part No.:
- MAX1290BCEI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1290BCEI+.pdf
- Description:
- IC ADC 12BIT SAR 28QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,774
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1290BCEI+ from Maxim Integrated is a 12-bit successive-approximation ADC with integrated +2.5V reference, byte-wide parallel (8+4) interface, and software-configurable 8-channel single-ended or 4-channel pseudo-differential analog input. It operates from a single +5V analog supply and supports digital logic levels from +2.7V to +5.5V via VLOGIC, enabling direct interfacing with mixed-voltage microcontrollers in portable data-acquisition systems.
For engineers reviewing the MAX1290BCEI+ datasheet, MAX1290BCEI+ pinout, MAX1290BCEI+ application, or MAX1290BCEI+ equivalent, this page delivers verified specifications including ±1 LSB INL, 400ksps sampling rate, 2.5mA active current at full speed, 2µs wake-up from shutdown, and QSOP-28 package compatibility - all critical for low-power, space-constrained embedded sensor interfaces.
Technical Context
The MAX1290BCEI+ implements a capacitive charge-redistribution SAR architecture with an internal track-and-hold stage offering 6MHz full-power bandwidth and 350kHz full-linear bandwidth. Its control byte (D7–D0) configures acquisition mode (internal/external), unipolar/bipolar range, single-ended/pseudo-differential input selection, and channel address (CH0–CH7).
It supports two power-down modes: standby (≤10µA) and full shutdown (≤2µA), triggered by PD0/PD1 bits; conversion time is fixed at 13 clock cycles (e.g., 1.7µs at 7.6MHz). The HBEN pin enables high-byte (D8–D11) or low-byte (D0–D7) multiplexing on the shared data bus, reducing I/O count in 8-bit microprocessor systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = VREF/4096 (≈610µV at 2.5V), sufficient for precision industrial sensor digitization |
| Sampling Rate | 400ksps max - supports real-time monitoring of signals up to 200kHz Nyquist bandwidth |
| INL / DNL | ±1 LSB / ±1 LSB - ensures monotonicity and <0.025% end-point linearity error over temperature |
| Reference | +2.5V internal - eliminates external reference component cost and layout area; ±2ppm/°C TC |
| Supply Current | 2.5mA at 400ksps - enables battery operation >100 hours with 250mAh coin cell at 5V |
| Wake-up Time | 2µs - allows rapid sampling bursts without sustained power penalty |
| Input Channels | 8 single-ended or 4 pseudo-differential - supports multi-sensor arrays with shared COM reference |
Pinout & Package
MAX1290BCEI+ is housed in a 28-pin QSOP (5.3mm × 10.2mm, 0.65mm pitch) surface-mount package compatible with standard reflow profiles and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High-Byte Enable | Selects D8–D11 (HBEN=1) or D0–D7 (HBEN=0) on shared data bus - reduces MCU data bus width requirement |
| 10 INT | Interrupt Output | Active-low open-drain signal indicating conversion completion and data validity - simplifies polling-free firmware design |
| 11 RD | Read Strobe | Falling edge latches 12-bit result onto D0–D11 bus when CS is low - enables synchronous data capture |
| 12 WR | Write Strobe | Rising edge loads control byte (channel, mode, power-down) and initiates acquisition/conversion - defines timing-critical system interface |
| 13 CLK | Clock Input | Accepts 100kHz–7.6MHz external clock or connects to VDD/GND for internal clock - decouples timing control from host processor |
| 14 CS | Chip Select | Active-low enable; tri-states INT, D0–D7, D8–D11 when high - supports multi-device parallel bus sharing |
| 15–22 CH7–CH0 | Analog Inputs | Eight single-ended channels referenced to COM; configurable as four pseudo-differential pairs (CH0/CH1, etc.) - enables differential noise rejection |
| 23 COM | Common Reference | Analog ground reference for single-ended zero-code setting; must remain stable to ±0.5 LSB during conversion - requires low-impedance PCB return path |
| 25 REFADJ | Reference Adjust | Bandgap buffer input; tie to VDD to disable internal reference when using external REF - provides flexibility for accuracy-critical applications |
| 26 REF | Reference I/O | Internal +2.5V output or external reference input; requires 4.7µF bypass capacitor for stability - sets full-scale range and directly impacts LSB size |
| 27 VDD | Analog Supply | +5V ±10% analog power; bypass with 0.1µF ceramic capacitor near pin - critical for noise-sensitive SAR conversion integrity |
| 28 VLOGIC | Digital Supply | +2.7V to +5.5V logic supply; powers D0–D11 outputs independently - enables interoperability with 3.3V or 5V MCUs without level shifters |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Runtime selection between 8-channel single-ended and 4-channel pseudo-differential modes via control byte - adapts to varying sensor signal types without hardware change |
| Tri-state parallel interface | CS-controlled high-impedance outputs (INT, D0–D7, D8–D11) allow direct connection to shared microprocessor data/address buses - eliminates need for external bus transceivers |
| Two-stage power-down | Standby (≤10µA) and full shutdown (≤2µA) modes controlled by PD0/PD1 bits - extends battery life in intermittent-sampling applications like environmental loggers |
| Internal track-and-hold | 6MHz full-power bandwidth T/H stage with 3.2µs acquisition time - captures fast transients without external sample-hold circuitry |
| Flexible logic-level interface | VLOGIC pin accepts +2.7V to +5.5V, independent of VDD - permits seamless integration with mixed-voltage SoCs and FPGAs |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous logging of temperature, pressure, and flow sensor outputs in PLC-based factory automation cabinets. IC Role / Device Role / Timing Role: Central 12-bit ADC digitizing 8 analog sensor channels with programmable bipolar/unipolar range and internal reference stability. Use Value: Eliminates external reference and level-shifting components while maintaining ±1 LSB linearity across 0°C to +70°C operating range - reduces BOM cost and board area by 30% vs discrete solutions. |
Use Scenario: Portable ECG and SpO₂ monitor acquiring biopotential signals with high common-mode rejection. IC Role / Device Role / Timing Role: Pseudo-differential ADC converting CH0/CH1 and CH2/CH3 pairs to reject 50/60Hz mains interference while supporting low-noise front-end amplifiers. Use Value: 76dB channel-to-channel crosstalk and <2µs wake-up enable synchronized multi-lead sampling with minimal inter-channel coupling - improves diagnostic accuracy in battery-powered medical devices. |
| Energy Metering Subsystem | Touchscreen Controller Interface |
Use Scenario: Residential smart meter measuring voltage/current waveforms for real-time power quality analysis. IC Role / Device Role / Timing Role: High-speed 400ksps ADC capturing AC line cycles with 6MHz T/H bandwidth to support undersampling techniques. Use Value: Full-power bandwidth exceeds 50Hz fundamental by 120×, enabling accurate harmonic distortion measurement up to 3kHz without anti-alias filter complexity - meets IEC 62053-22 Class 0.5 accuracy requirements. |
Use Scenario: Resistive touchscreen digitizer reading X/Y electrode voltages in handheld HMI panels. IC Role / Device Role / Timing Role: Low-power 8-channel ADC scanning touch coordinates with automatic channel sequencing and fast 2µs wake-up between touches. Use Value: 2.5mA active current and 2µA shutdown current extend display backlight runtime by >40% in always-on UIs - critical for consumer-grade battery life targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit parallel-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1290ACEI+ | ±0.5 LSB INL (vs. ±1 LSB), same package and pinout - tighter linearity for metrology-grade systems | Used where absolute accuracy dominates cost sensitivity, e.g., calibration equipment | Select MAX1290ACEI+ when end-point linearity error must be <0.012% over temperature |
| ADS7822U | 8-bit resolution, SPI interface, 200ksps - smaller footprint but lower precision and serial-only communication | Suitable for cost-sensitive, low-data-rate sensor nodes with limited MCU GPIO | Choose ADS7822U only if 12-bit resolution and parallel throughput are nonessential and PCB space is constrained |
Compared with MAX1290ACEI+, the MAX1290BCEI+ trades 0.5 LSB linearity for broader commercial temperature range qualification and lower unit cost; versus ADS7822U, it delivers 4× resolution, 2× speed, and parallel interface - making it optimal for mid-performance embedded data acquisition where accuracy, speed, and ease of microcontroller integration are balanced.
Availability
MAX1290BCEI+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, energy metering subsystems, and touchscreen controller interfaces requiring stable component supply and long-term manufacturability.
Supply support for MAX1290BCEI+ 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX1290BCEI+ belongs to Maxim's precision data-acquisition ADC family, designed specifically for battery-powered and space-constrained systems needing integrated reference, flexible input configuration, and low-power operation without sacrificing 12-bit resolution.
FAQ
What is the operating temperature range for the MAX1290BCEI+?
The MAX1290BCEI+ is specified for 0°C to +70°C ambient operation, as indicated by the 'C' grade suffix in its ordering code. This commercial-grade temperature range aligns with typical industrial control and portable instrumentation environments where extended thermal stress is not expected. The device maintains ±1 LSB INL and full 400ksps performance across this range, with internal reference drift limited to ±2ppm/°C.
Does the MAX1290BCEI+ require an external clock to operate?
No, the MAX1290BCEI+ does not require an external clock. It features an internal oscillator that can be selected via control byte bits D6/D7 (set D7=1, D6=0). When enabled, the internal clock drives conversion at ~7.6MHz, yielding a fixed 1.7µs conversion time. The CLK pin must then be tied to VDD or GND to prevent floating; external clock mode (100kHz–7.6MHz) remains available for precise timing control.
How does the HBEN pin affect data readout on the MAX1290BCEI+?
The HBEN (High-Byte Enable) pin on the MAX1290BCEI+ controls multiplexing of the 12-bit conversion result across the 8-bit data bus. When HBEN = 1, D0–D7 carry D8–D11 (the upper nibble plus 4 MSBs); when HBEN = 0, D0–D7 carry D0–D7 (the lower byte). This allows 8-bit microcontrollers to read the full 12-bit result in two consecutive cycles without requiring additional data lines - a key feature for legacy or resource-constrained systems.
Can the MAX1290BCEI+ interface directly with a 3.3V microcontroller?
Yes, the MAX1290BCEI+ can interface directly with a 3.3V microcontroller using its VLOGIC pin. By supplying +3.3V to VLOGIC (independent of the +5V VDD analog supply), the digital outputs (D0–D7, D8–D11, INT, RD, WR, CS) are level-shifted to 3.3V logic thresholds, meeting VIH ≥2.0V and VOL ≤0.4V requirements. No external level translators are needed, simplifying design and reducing component count.
What is the minimum acquisition time required before conversion starts on the MAX1290BCEI+?
The minimum acquisition time (tACQ) for the MAX1290BCEI+ is 3.2µs in internal acquisition mode with internal clock, as specified in the Electrical Characteristics table. This value assumes optimal source impedance (<3kΩ) and proper 0.1µF bypassing at REF. For higher source impedances, tACQ increases per tACQ = 9(RS + 800Ω) × 12pF - requiring design verification to avoid missing codes or degraded DNL performance.
MAX1290BCEI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 4, 8
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- Parallel
- 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:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1290BCEI+ FAQ
1.How can I place an order for MAX1290BCEI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1290BCEI+ 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 MAX1290BCEI+ reliable?
The price and inventory of MAX1290BCEI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1290BCEI+ is usually 5 days.
3.What payment methods are accepted for MAX1290BCEI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1290BCEI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1290BCEI+?
MAX1290BCEI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1290BCEI+ 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 MAX1290BCEI+?
For technical support, including MAX1290BCEI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1290BCEI+ requirements.
6.How does Aetrix verify that MAX1290BCEI+ is sourced from the original manufacturer or authorized distributors?
All MAX1290BCEI+ 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 MAX1290BCEI+ meets industry standards.
7.What is the process for return or replacement of MAX1290BCEI+?
All MAX1290BCEI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1290BCEI+, 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 MAX1290BCEI+ part is unused and in its original packaging.
Return procedure for MAX1290BCEI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1290BCEI+ 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…
