My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1293BEEG+T
- Part No.:
- MAX1293BEEG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1293BEEG+T.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,414
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1293BEEG+T from Maxim Integrated is a 12-bit, 250ksps successive-approximation ADC with integrated +2.5V reference, software-configurable 4-channel single-ended / 2-channel pseudo-differential analog input multiplexer, and byte-wide parallel (8+4) interface. It operates from a single +3V analog supply and supports digital I/O logic levels from +1.8V to +3.6V via VLOGIC. Designed for low-power data acquisition in portable medical and industrial monitoring systems.
For engineers reviewing the MAX1293BEEG+T datasheet, MAX1293BEEG+T pinout, MAX1293BEEG+T application, or MAX1293BEEG+T equivalent, key selection criteria include its ±0.5 LSB INL, 3MHz full-power bandwidth track/hold, 2µs wake-up from shutdown, tri-state INT output, and QSOP-24 package compatibility with space-constrained embedded designs.
Technical Context
The MAX1293BEEG+T implements a charge-redistribution SAR architecture with an internal 3MHz full-power bandwidth track-and-hold stage, enabling undersampling of high-frequency transients up to 3MHz while maintaining DC accuracy. Its analog input structure supports unipolar/bipolar and single-ended/pseudo-differential modes via software-controlled configuration bits.
Conversion is initiated by a control byte written via the parallel interface, with selectable internal or external clocking and internal/external acquisition timing. The device features two software-selectable power-down modes-standby (10µA) and full shutdown (2µA)-and automatically tri-states INT when CS goes high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 610 µV step size with 2.5V reference for precise sensor digitization |
| Sampling Rate | 250ksps - supports real-time capture of signals up to 125kHz Nyquist frequency |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures monotonicity and <0.012% integral linearity error across full scale |
| Reference | +2.5V internal - eliminates need for external reference IC; TCREF = ±2 ppm/°C for stable accuracy over temperature |
| Power Consumption | 1.9mA at 250ksps - enables battery operation with <5.7mW total dissipation at VDD = VLOGIC = 3V |
| Analog Input Channels | 4 single-ended or 2 pseudo-differential - matches compact sensor arrays in patient monitors and energy meters |
| Package | 24-pin QSOP - 8.7mm × 3.9mm footprint compatible with automated SMT assembly and IPC-7351B land patterns |
Pinout & Package
MAX1293BEEG+T is housed in a 24-pin QSOP (Quad Small Outline Package) with 0.65mm pitch, JEDEC MS-013AC compliant, and rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High-Byte Enable | Selects MSB (D8–D11) or LSB (D0–D7) on shared data bus; enables 12-bit read in two cycles |
| 2–9 D7–D0/D11–D8 | Three-State Parallel Data Bus | Bidirectional 8-bit bus multiplexed with 4-bit high byte; supports standard µP I/O timing |
| 10 INT | Interrupt Output | Active-low open-drain signal asserted when conversion completes and data is ready |
| 11 RD | Read Strobe | Falling edge reads conversion result; tri-states outputs when CS is high |
| 12 WR | Write Strobe | Rising edge latches control byte (channel, mode, clock config); initiates acquisition/conversion |
| 13 CLK | Clock Input/Output | Accepts external 100kHz–4.8MHz clock or floats for internal clock mode (tie to VDD/GND) |
| 14 CS | Chip Select | Active-low enable; forces all digital outputs into high-impedance state when deasserted |
| 15–18 CH0–CH3 | Analog Input Channels | Single-ended inputs referenced to COM; support unipolar (0–2.5V) or bipolar (±1.25V) ranges |
| 19 COM | Common Reference | Analog ground reference for single-ended mode; must be stable to ±0.5 LSB during conversion |
| 20 GND | Analog & Digital Ground | Single ground plane connection; requires low-inductance layout to minimize noise coupling |
| 21 REFADJ | Reference Buffer Control | Connect to VDD to disable internal bandgap; bypass with 0.01µF capacitor when using external reference |
| 22 REF | Reference Input/Output | Supplies +2.5V internal reference; requires 4.7µF capacitor to GND for stability |
| 23 VDD | Analog Supply | +2.7V to +3.6V analog rail; bypass with 0.1µF ceramic capacitor close to pin |
| 24 VLOGIC | Digital I/O Supply | +1.8V to +3.6V logic rail; sets output voltage levels independently of VDD for mixed-voltage interfacing |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable analog input | Runtime selection of 4-channel single-ended or 2-channel pseudo-differential mode via control byte bit SGL/DIF |
| Tri-state INT output | INT automatically enters high-impedance state when CS is high, eliminating need for external buffer in multi-device buses |
| Low-power shutdown | Full shutdown current ≤2µA enables >1-year battery life in intermittent-sampling applications like remote data loggers |
| Flexible logic-level interface | VLOGIC pin allows direct connection to +1.8V, +2.5V, or +3.3V microcontrollers without level-shifting circuitry |
| Internal track/hold | 3MHz full-power bandwidth enables accurate digitization of fast transients without external sample-hold IC |
Applications
| Patient Monitoring | Industrial Data Logging |
|---|---|
Use Scenario: Continuous acquisition of ECG, SpO₂, and respiration waveforms in portable bedside monitors. IC Role / Device Role / Timing Role: Primary ADC digitizing analog front-end sensor outputs with 12-bit resolution and <125kHz effective bandwidth. Use Value: ±0.5 LSB INL ensures clinical-grade amplitude fidelity; 2µs wake-up supports burst-mode sampling to extend battery life. |
Use Scenario: Battery-powered environmental sensors logging temperature, humidity, and pressure in remote field deployments. IC Role / Device Role / Timing Role: Low-power ADC capturing sensor outputs at 10–100ksps rates with automatic power-down between samples. Use Value: 2µA shutdown current enables multi-year operation; internal +2.5V reference eliminates calibration drift from external components. |
| Energy Management Systems | Touch Screen Controllers |
Use Scenario: Real-time voltage/current measurement in smart metering and power quality analyzers. IC Role / Device Role / Timing Role: High-accuracy ADC interfacing with isolation amplifiers to digitize mains-referenced analog signals. Use Value: 3MHz full-power bandwidth supports harmonic analysis up to 50th order; ±1 LSB DNL guarantees no missing codes in revenue-grade metering. |
Use Scenario: Digitizing analog resistive touch panel voltages in handheld HMI devices with limited PCB area. IC Role / Device Role / Timing Role: Compact 24-pin ADC providing 4-channel single-ended input for X/Y position sensing with minimal external components. Use Value: QSOP-24 footprint saves board space vs. larger packages; VLOGIC compatibility enables direct interface to +1.8V application processors. |
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 |
|---|---|---|---|
| MAX1293ACEG+ | 0°C to +70°C operating range vs. -40°C to +85°C for MAX1293BEEG+T; identical electrical specs and pinout | Suitable for commercial-grade equipment only; not qualified for extended industrial or medical environments | Select MAX1293ACEG+ only if ambient temperature remains within 0–70°C and cost sensitivity outweighs reliability requirements |
| ADS7822U | 8-bit resolution, SPI interface, no internal reference; 200ksps max rate; SOIC-8 package | Targeted at lower-precision, space-constrained applications where serial interface and smaller footprint are prioritized over resolution and parallel speed | Choose ADS7822U only when 8-bit resolution suffices and system design favors SPI over parallel bus architecture |
Compared with MAX1293ACEG+, the MAX1293BEEG+T provides extended temperature qualification critical for field-deployed instrumentation; versus ADS7822U, it delivers 4× higher resolution, parallel throughput, and integrated reference-enabling faster, more accurate, and simpler system-level integration.
Availability
MAX1293BEEG+T is available at Aetrix Electronics and suitable for patient monitoring, industrial data logging, and energy management systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1293BEEG+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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1293BEEG+T belongs to Maxim's low-power, high-accuracy data acquisition ADC family, designed specifically for battery-operated and space-constrained systems demanding 12-bit resolution, integrated reference, and flexible digital interfacing.
FAQ
What is the operating temperature range of the MAX1293BEEG+T?
The MAX1293BEEG+T is specified for operation from -40°C to +85°C, making it suitable for industrial and medical environments where extended thermal performance is required. This rating is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet, and distinguishes it from the commercial-grade MAX1293ACEG+ (0°C to +70°C).
Does the MAX1293BEEG+T require an external reference voltage?
No, the MAX1293BEEG+T includes a precision +2.5V internal bandgap reference with ±2 ppm/°C temperature coefficient and 2.49V to 2.51V output tolerance. An external reference may be used by connecting REFADJ to VDD and applying a stable voltage to the REF pin, but it is not required for standard operation.
How does the MAX1293BEEG+T handle 12-bit data output on an 8-bit bus?
The MAX1293BEEG+T uses the HBEN (High Byte Enable) pin to multiplex its 12-bit result across the 8-bit data bus: when HBEN = 0, D0–D7 carry the LSB byte; when HBEN = 1, D0–D3 carry the MSB nibble (D8–D11). Two consecutive reads retrieve the full conversion result without requiring additional data lines.
Can the MAX1293BEEG+T interface directly with a +1.8V microcontroller?
Yes-the MAX1293BEEG+T supports logic-level independence via the VLOGIC pin, which accepts +1.8V to +3.6V. When VLOGIC = +1.8V, its digital outputs (D0–D7, INT, RD, WR) swing between 0V and ~1.3V, meeting input thresholds of modern +1.8V I/O standards without level shifters.
What power-down modes does the MAX1293BEEG+T support, and how much current do they draw?
The MAX1293BEEG+T offers two software-selectable power-down modes: Standby mode draws ≤10µA, and Full Shutdown draws ≤2µA (typical). Both modes retain register settings and resume operation in ≤2µs upon wake-up, enabling aggressive power cycling in duty-cycled data acquisition systems.
MAX1293BEEG+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 2, 4
- 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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 1.8V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1293BEEG+T FAQ
1.How can I place an order for MAX1293BEEG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1293BEEG+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 MAX1293BEEG+T reliable?
The price and inventory of MAX1293BEEG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1293BEEG+T is usually 5 days.
3.What payment methods are accepted for MAX1293BEEG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1293BEEG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1293BEEG+T?
MAX1293BEEG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1293BEEG+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 MAX1293BEEG+T?
For technical support, including MAX1293BEEG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1293BEEG+T requirements.
6.How does Aetrix verify that MAX1293BEEG+T is sourced from the original manufacturer or authorized distributors?
All MAX1293BEEG+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 MAX1293BEEG+T meets industry standards.
7.What is the process for return or replacement of MAX1293BEEG+T?
All MAX1293BEEG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1293BEEG+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 MAX1293BEEG+T part is unused and in its original packaging.
Return procedure for MAX1293BEEG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1293BEEG+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…
