My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1090ACEI+T
- Part No.:
- MAX1090ACEI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1090ACEI+T.pdf
- Description:
- IC ADC 10BIT SAR 28QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,840
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1090ACEI+T from Maxim Integrated is a 10-bit successive-approximation ADC with internal +2.5V reference, 8-channel single-ended / 4-channel pseudo-differential analog input multiplexer, byte-wide parallel (8+2) interface, and 400ksps max sampling rate. It operates from a single +5V analog supply and supports user-adjustable digital logic levels (+2.7V to +5.5V) via VLOGIC pin, enabling direct interfacing with mixed-voltage microprocessors in portable data-acquisition systems.
For engineers reviewing the MAX1090ACEI+T datasheet, MAX1090ACEI+T pinout, MAX1090ACEI+T application, or MAX1090ACEI+T equivalent, key selection criteria include its ±0.5 LSB INL at 0°C to +70°C, software-configurable unipolar/bipolar input mode, 2.5mA active current at 400ksps, tri-state INT output, and QSOP-28 package compatibility with industrial sensor front-ends and battery-powered medical monitors.
Technical Context
The MAX1090ACEI+T implements a charge-redistribution SAR architecture with integrated track-and-hold (6MHz full-power bandwidth), on-chip 6MHz clock generator, and configurable acquisition timing (internal or external). Its analog input stage supports both single-ended (CH0–CH7) and pseudo-differential (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7) modes via software-controlled control byte.
Digital interface uses an 8+2 parallel bus with HBEN for high-byte/low-byte multiplexing, active-low CS/WR/RD control, and interrupt-driven readout via open-drain INT. Power management includes two software-selectable power-down modes reducing supply current to <2µA, with fast 2µs wake-up time and automatic reference shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for precision measurement of analog signals within ±0.5 LSB INL tolerance. |
| Sampling Rate | 400ksps maximum - supports real-time digitization of signals up to 350kHz full-linear bandwidth without aliasing in undersampling applications. |
| Analog Input Channels | 8 single-ended or 4 pseudo-differential - enables multi-sensor monitoring (e.g., temperature, pressure, voltage) without external MUX hardware. |
| Reference | +2.5V internal bandgap - eliminates need for external reference IC; stable to ±20ppm/°C and ±100mV REFADJ adjustment range. |
| Supply Current | 2.5mA at 400ksps - enables low-power operation in battery-backed systems; drops to 2µA in shutdown mode. |
| Digital Interface | Byte-wide parallel (8+2) with HBEN - simplifies connection to 8-bit µPs via two read cycles or 10-bit buses using high-byte enable control. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded instrumentation and industrial control panels. |
Pinout & Package
MAX1090ACEI+T is housed in a 28-pin QSOP (Quad Small Outline Package) with 0.15mm lead pitch and 7.6mm × 10.2mm body size, suitable for automated SMT assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High Byte Enable | Selects whether D7–D0 carry LSBs (HBEN=0) or MSBs (HBEN=1); enables 10-bit readout over 8-bit data bus. |
| 10 INT | Interrupt Output | Active-low signal indicating conversion completion and data readiness; tri-states when CS is high. |
| 11 RD | Read Select | Falling edge initiates data read from D7–D0; requires CS low to activate output drivers. |
| 12 WR | Write Select | Rising edge latches control byte (channel, mode, clock/power-down settings) and triggers acquisition/conversion sequence. |
| 13 CLK | Clock Input | Accepts external 100kHz–7.6MHz TTL/CMOS clock; tied to VDD/GND to enable internal clock mode. |
| 14 CS | Chip Select | Active-low enable for digital interface; places INT, D7–D0 in high-impedance state when deasserted. |
| 15–22 CH7–CH0 | Analog Input Channels | Eight single-ended inputs; configured as four differential pairs in pseudo-differential mode. |
| 23 COM | Common Reference | Analog ground reference for single-ended mode; must remain stable to ±0.5 LSB during conversion. |
| 25 REFADJ | Reference Adjust | Bias node for internal bandgap; connect to VDD to disable internal reference when using external REF. |
| 26 REF | Reference I/O | Output of internal +2.5V reference or input for external reference; requires 4.7µF bypass capacitor. |
| 27 VDD | Analog Supply | +5V ±10% analog power rail; bypassed with 0.1µF capacitor to GND for noise suppression. |
| 28 VLOGIC | Digital Supply | +2.7V to +5.5V logic-level supply; sets output voltage swing for D7–D0 and INT pins independently of VDD. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Single-ended (8 ch) or pseudo-differential (4 ch) mode selected via control byte D4 bit - eliminates need for external analog switching circuitry. |
| Unipolar/bipolar input support | Configured via D3 bit (UNI/BIP); unipolar: 0 to +2.5V full-scale; bipolar: –1.25V to +1.25V - accommodates both sensor and AC-coupled signal sources. |
| Low-power operation with fast wake-up | 2.5mA active current at 400ksps; <2µA shutdown current; 2µs wake-up - extends battery life in portable data loggers without sacrificing responsiveness. |
| Internal track-and-hold with 6MHz bandwidth | Eliminates need for external T/H amplifier; supports accurate sampling of transients and high-frequency components up to Nyquist limit. |
| Tri-state INT output with CS control | INT goes high-Z when CS is high - prevents bus contention in multi-device parallel interfaces without external logic. |
| Independent digital supply (VLOGIC) | Supports +2.7V to +5.5V logic interface - enables seamless integration with 3.3V µPs while maintaining +5V analog performance. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors in PLC-based control cabinets with limited board space and thermal budget. IC Role / Device Role / Timing Role: 10-bit ADC digitizing 8 analog sensor outputs sequentially; internal reference ensures stable scaling across temperature drift. Use Value: Eliminates external reference and level-shifting circuitry, reducing BOM count by 3 components per channel while maintaining ±0.5 LSB linearity over 0°C to +70°C. |
Use Scenario: Portable ECG and SpO₂ monitor requiring low-noise, low-power analog front-end with minimal PCB footprint. IC Role / Device Role / Timing Role: Digitizes biopotential signals from electrode arrays using pseudo-differential mode to reject common-mode interference. Use Value: 2µA shutdown current extends battery runtime beyond 72 hours; 2µs wake-up enables responsive on-demand measurements without latency penalty. |
| Energy Meter Data Logging | Touchscreen Controller Interface |
Use Scenario: Residential smart meter capturing voltage/current waveforms at 400ksps for harmonic analysis and power quality reporting. IC Role / Device Role / Timing Role: High-speed ADC sampling isolated current transformer outputs with bipolar input configuration for AC waveform capture. Use Value: 350kHz full-linear bandwidth allows accurate reconstruction of 50/60Hz fundamentals plus 5th–7th harmonics without anti-alias filter complexity. |
Use Scenario: Resistive touchscreen digitizer in handheld HMI where MCU lacks built-in ADC or requires higher resolution than on-chip peripheral. IC Role / Device Role / Timing Role: Reads X/Y coordinate voltages from touch panel via CH0–CH3 in single-ended mode; controlled by µP via parallel interface. Use Value: 8-channel capability supports 4-wire resistive touch with dedicated channels for X+, X−, Y+, Y−, reducing routing congestion and improving noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit parallel-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, SPI interface, no internal reference, 200ksps max rate | Lacks parallel interface and internal reference; requires external ref and level-shifting for 3.3V µPs | Choose for cost-sensitive, lower-resolution designs where serial interface suffices and board space permits external reference. |
| MAX1166CEE+ | 12-bit resolution, I²C interface, internal reference, 100ksps max rate | Higher resolution but slower; I²C limits throughput vs. parallel bus; same QSOP-16 package (not pin-compatible) | Prefer for precision applications needing >10-bit accuracy where speed is secondary and I²C bus is already present. |
Compared with ADS7822U and MAX1166CEE+, the MAX1090ACEI+T uniquely combines 10-bit accuracy, 400ksps parallel throughput, integrated +2.5V reference, and VLOGIC voltage flexibility-making it optimal for µP-based data loggers requiring deterministic timing and minimal external components.
Availability
MAX1090ACEI+T is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, energy meter data logging, and touchscreen controller interface applications requiring stable component supply and long-term production continuity.
Supply support for MAX1090ACEI+T 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 systems.
The MAX1090ACEI+T belongs to Maxim's precision data-acquisition ADC product line, designed specifically for low-power, space-constrained applications demanding integrated references, flexible digital interfacing, and robust analog input protection.
FAQ
What is the operating temperature range for the MAX1090ACEI+T?
The MAX1090ACEI+T is specified for operation from 0°C to +70°C (Commercial grade). This range is confirmed in the Ordering Information table and Electrical Characteristics section of the datasheet, where parameters like INL (±0.5 LSB), gain error (±2 LSB), and supply current are guaranteed across this interval. The 'C' suffix in ACEI denotes the 0°C to +70°C rating, distinguishing it from 'E' grade (–40°C to +85°C) variants like MAX1090AEEI.
Does the MAX1090ACEI+T require an external clock to operate?
No, the MAX1090ACEI+T does not require an external clock. It features an internal 6MHz clock generator selectable via control byte bits D7/D6. When configured for internal clock mode, the CLK pin must be tied to VDD or GND to prevent floating. External clock operation (100kHz–7.6MHz) is optional and used when precise aperture timing or synchronization with system clocks is required.
How many analog input channels does the MAX1090ACEI+T support in single-ended mode?
The MAX1090ACEI+T supports eight analog input channels (CH0 through CH7) in single-ended mode, as explicitly stated in the General Description and Pin Configurations sections. This is specific to the MAX1090 family; the pin-compatible MAX1092 variant supports only four single-ended channels. Channel selection is performed via address bits A2–A0 in the control byte.
Can the MAX1090ACEI+T interface directly with a 3.3V microprocessor?
Yes, the MAX1090ACEI+T can interface directly with a 3.3V microprocessor using its VLOGIC pin. The device allows the digital I/O voltage to be set independently from the +5V analog supply - VLOGIC accepts +2.7V to +5.5V, so 3.3V is fully supported. This ensures correct VOH/VOL levels on D7–D0 and INT pins without level-shifting circuitry.
What is the purpose of the HBEN pin on the MAX1090ACEI+T?
The HBEN (High Byte Enable) pin on the MAX1090ACEI+T controls multiplexing of the 10-bit conversion result onto the 8-bit data bus. When HBEN = 1, D7–D0 carry the two most significant bits (D9, D8); when HBEN = 0, they carry the eight least significant bits (D7–D0). This enables full 10-bit readout using standard 8-bit µP buses without requiring a 10-bit wide interface.
MAX1090ACEI+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
MAX1090ACEI+T FAQ
1.How can I place an order for MAX1090ACEI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1090ACEI+T 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 MAX1090ACEI+T reliable?
The price and inventory of MAX1090ACEI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1090ACEI+T is usually 5 days.
3.What payment methods are accepted for MAX1090ACEI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1090ACEI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1090ACEI+T?
MAX1090ACEI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1090ACEI+T 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 MAX1090ACEI+T?
For technical support, including MAX1090ACEI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1090ACEI+T requirements.
6.How does Aetrix verify that MAX1090ACEI+T is sourced from the original manufacturer or authorized distributors?
All MAX1090ACEI+T 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 MAX1090ACEI+T meets industry standards.
7.What is the process for return or replacement of MAX1090ACEI+T?
All MAX1090ACEI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1090ACEI+T, 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 MAX1090ACEI+T part is unused and in its original packaging.
Return procedure for MAX1090ACEI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1090ACEI+T 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…
