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Analog Devices Inc./Maxim Integrated MAX1090BCEI+
- Part No.:
- MAX1090BCEI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1090BCEI+.pdf
- Description:
- IC ADC 10BIT SAR 28QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
MAX1090BCEI+ from Maxim Integrated is a 10-bit successive-approximation ADC with integrated +2.5V reference, 8-channel single-ended / 4-channel pseudo-differential analog input multiplexer, byte-wide parallel (8+2) interface, and software-configurable unipolar/bipolar operation. 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 microprocessors in portable data-acquisition systems.
For engineers reviewing the MAX1090BCEI+ datasheet, MAX1090BCEI+ pinout, MAX1090BCEI+ application, or MAX1090BCEI+ equivalent, key selection considerations include its 400ksps sampling rate, ±0.5 LSB INL at 0°C to +70°C, 2.5mA active current at full speed, 2µs wake-up from shutdown, and QSOP-28 package compatibility with industrial sensor front-ends and battery-powered medical monitors.
Technical Context
The MAX1090BCEI+ implements a 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), clock source (internal/external), power-down state (full/standby), input polarity (unipolar/bipolar), and channel selection (CH0–CH7).
It supports two distinct data output formats via HBEN: when HBEN = 0, D7–D0 deliver the 8 LSBs; when HBEN = 1, D1/D9 and D0/D8 carry the 2 MSBs while D7–D2 remain unused. The INT output asserts low upon conversion completion and auto-clears on RD or new control-byte write, enabling interrupt-driven µP read cycles without polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for precise analog signal digitization |
| Sampling Rate | 400ksps max - supports real-time capture of signals up to ~175kHz (Nyquist-limited) |
| INL | ±0.5 LSB (0°C to +70°C) - ensures monotonicity and <0.05% full-scale linearity error |
| Supply Current | 2.5mA at 400ksps - enables low-power operation with 10mW total dissipation at VDD = VLOGIC = +5V |
| Wake-up Time | 2µs from shutdown - allows rapid reactivation between sparse sampling events |
| Reference | +2.5V internal - eliminates need for external reference component; ±20ppm/°C tempco |
| Analog Inputs | 8 single-ended or 4 pseudo-differential channels - provides flexible sensor multiplexing in compact space |
Pinout & Package
MAX1090BCEI+ is housed in a 28-pin QSOP (Quad Small Outline Package) with 0.15mm lead pitch and 10.2mm × 5.3mm body size, optimized for high-density PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High Byte Enable | Selects 8-LSB (HBEN=0) or 2-MSB (HBEN=1) output format on D-bus; enables 10-bit result multiplexing |
| 10 INT | Interrupt Output | Active-low open-drain flag signaling conversion completion and data readiness for µP read |
| 11 RD | Read Strobe Input | Falling edge triggers three-state enable of D7–D0 outputs when CS is low |
| 12 WR | Write Strobe Input | Rising edge latches control byte and initiates acquisition/conversion sequence |
| 14 CS | Chip Select | Active-low enable; places INT and D7–D0 in high-impedance state when deasserted |
| 15–22 CH0–CH7 | Analog Input Channels | Single-ended inputs referenced to COM; CH0–CH7 selectable via control byte A2–A0 |
| 23 COM | Common Reference | Zero-code reference point in single-ended mode; must be stable to ±0.5 LSB during conversion |
| 26 REF | Reference Output/Input | Provides +2.5V internal reference; accepts external reference when REFADJ tied to VDD |
| 27 VDD | Analog Supply | +5V ±10% analog power rail; bypass with 0.1µF capacitor to GND for noise immunity |
| 28 VLOGIC | Digital Supply | +2.7V to +5.5V logic supply; sets output voltage levels and powers D-bus drivers independently |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Single-ended (8 ch) or pseudo-differential (4 ch) mode selected via SGL/DIF bit in control byte |
| Flexible logic-level interface | VLOGIC pin decouples digital I/O voltage from analog supply, enabling seamless interfacing with 2.7V–5.5V µPs |
| Low-power shutdown | Reduces supply current to <2µA; wake-up time fixed at 2µs regardless of temperature or supply variation |
| Integrated reference accuracy | +2.5V output with ±100mV adjust range (REFADJ), ±20ppm/°C tempco, and <±0.5 LSB drift over 0°C to +70°C |
| Robust analog input protection | Internal clamping diodes allow safe operation with input voltages from (GND − 300mV) to (VDD + 300mV) |
Applications
| Industrial Sensor Interface | Patient Monitoring Front-End |
|---|---|
Use Scenario: Digitizing thermocouple, RTD, and pressure transducer outputs in PLC analog input modules. IC Role / Device Role / Timing Role: 10-bit SAR ADC with programmable bipolar input range (±1.25V) and 8-channel mux for multi-sensor scanning. Use Value: Eliminates external reference and level-shifting circuitry while maintaining ±0.5 LSB INL across 0°C to +70°C operating range. |
Use Scenario: Acquiring ECG, SpO₂, and respiration waveforms in portable clinical monitors. IC Role / Device Role / Timing Role: Low-noise, low-power ADC with fast wake-up (2µs) and 400ksps throughput for multi-lead real-time waveform capture. Use Value: Enables battery life extension via automatic shutdown between samples without sacrificing timing determinism or resolution. |
| Energy Meter Data Logger | Touchscreen Controller Interface |
Use Scenario: Sampling voltage/current transformer outputs in Class 0.5 smart meters with anti-alias filtering. IC Role / Device Role / Timing Role: High-precision ADC with 350kHz full-linear bandwidth supporting undersampling of 50/60Hz harmonics. Use Value: Delivers 60dB SINAD and <−72dB THD at 50kHz input, meeting IEC 62053-21 harmonic measurement requirements. |
Use Scenario: Converting resistive touchscreen X/Y coordinate voltages in handheld HMI panels. IC Role / Device Role / Timing Role: 8-channel single-ended ADC with COM-referenced inputs and software-selectable unipolar mode (0–2.5V). Use Value: Reduces BOM count by integrating reference and mux, while QSOP-28 footprint simplifies routing in space-constrained displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit parallel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1090ACEI+ | ±0.5 LSB INL specified over 0°C to +70°C (same as MAX1090BCEI+), but tighter gain error (±1 LSB vs. ±2 LSB) and lower offset error (±1 LSB vs. ±2 LSB) | Better DC accuracy for calibration-critical systems like precision weigh scales; identical pinout and timing | Select MAX1090ACEI+ when absolute accuracy at full temperature range is prioritized over cost |
| ADS7822U | 8-bit resolution, SPI interface, no internal reference, 200ksps max sampling rate, SO-8 package | Lacks parallel bus and integrated reference; requires external ref and µP SPI support; smaller footprint but lower resolution | Choose ADS7822U only for space-constrained, lower-resolution applications where serial interface is acceptable and external reference is already present |
Compared with MAX1090ACEI+, MAX1090BCEI+ trades minor DC accuracy (±2 LSB gain/offset vs. ±1 LSB) for broader availability and lower unit cost, while both maintain identical 400ksps performance, QSOP-28 footprint, and feature set. ADS7822U offers no functional equivalence due to resolution, interface, and integration gaps.
Availability
MAX1090BCEI+ is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical devices, and energy metering systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX1090BCEI+ 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX1090BCEI+ belongs to Maxim's low-power, high-speed data-acquisition ADC family, engineered specifically for space- and power-constrained systems needing integrated reference, flexible input configuration, and µP-friendly parallel interface.
FAQ
What is the operating temperature range for MAX1090BCEI+?
The MAX1090BCEI+ is rated for 0°C to +70°C ambient operation. This commercial-grade temperature specification is confirmed in the Ordering Information table, where "B" grade denotes the 0°C to +70°C range, and electrical characteristics including ±0.5 LSB INL and 2.5mA supply current are guaranteed across this full span.
Does MAX1090BCEI+ require an external clock to operate?
No, MAX1090BCEI+ supports both internal and external clock modes. When bits D7=1 and D6=0 in the control byte, the internal 6MHz clock is enabled-CLK pin must be tied to VDD or GND to prevent floating. External clock mode (D7=D6=1) accepts 100kHz–7.6MHz TTL/CMOS signals with 30%–70% duty cycle.
How does the HBEN pin affect data output on MAX1090BCEI+?
HBEN controls 10-bit result multiplexing on the 8-bit data bus. When HBEN = 0, D7–D0 output the 8 LSBs of the conversion result. When HBEN = 1, D1/D9 and D0/D8 output the 2 MSBs, while D7–D2 are undefined. This allows full 10-bit readout using standard 8-bit µP data buses without additional latches.
Can MAX1090BCEI+ interface directly with a 3.3V microprocessor?
Yes, MAX1090BCEI+ supports direct interfacing with 3.3V µPs via the VLOGIC pin. Applying +3.3V to VLOGIC sets VOH ≥ 2.8V and VOL ≤ 0.4V on D7–D0 and INT outputs, meeting 3.3V CMOS input thresholds. Digital inputs (CS, RD, WR, HBEN) accept 0.8V/2.0V logic levels independent of VLOGIC voltage.
What is the minimum acquisition time required before conversion starts on MAX1090BCEI+?
The MAX1090BCEI+ specifies a minimum tACQ of 3.2µs in internal acquisition mode and 4µs in external acquisition mode. This value is derived from the internal T/H circuit's 12pF input capacitance and 800Ω input resistance, and must be respected to ensure ±0.5 LSB accuracy-especially with source impedances >3kΩ.
MAX1090BCEI+ 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:
- 10
- 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:
- -
MAX1090BCEI+ FAQ
1.How can I place an order for MAX1090BCEI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1090BCEI+ 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 MAX1090BCEI+ reliable?
The price and inventory of MAX1090BCEI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1090BCEI+ is usually 5 days.
3.What payment methods are accepted for MAX1090BCEI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1090BCEI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1090BCEI+?
MAX1090BCEI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1090BCEI+ 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 MAX1090BCEI+?
For technical support, including MAX1090BCEI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1090BCEI+ requirements.
6.How does Aetrix verify that MAX1090BCEI+ is sourced from the original manufacturer or authorized distributors?
All MAX1090BCEI+ 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 MAX1090BCEI+ meets industry standards.
7.What is the process for return or replacement of MAX1090BCEI+?
All MAX1090BCEI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1090BCEI+, 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 MAX1090BCEI+ part is unused and in its original packaging.
Return procedure for MAX1090BCEI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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