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Analog Devices Inc./Maxim Integrated MAX1093BCEG+
- Part No.:
- MAX1093BCEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1093BCEG+.pdf
- Description:
- IC ADC 10BIT 250KSPS 24-QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,519
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Product details
Overview
MAX1093BCEG+ from Maxim Integrated is a 10-bit successive-approximation ADC with 4-channel single-ended or 2-channel pseudo-differential analog input multiplexing, +2.5V internal reference, byte-wide parallel (8+2) interface, and 250ksps sampling rate. It operates from a single +3V analog supply and supports digital logic levels from +1.8V to +3.6V via VLOGIC, enabling direct interfacing with low-voltage microprocessors in portable data-acquisition systems.
For engineers reviewing the MAX1093BCEG+ datasheet, MAX1093BCEG+ pinout, MAX1093BCEG+ application, or MAX1093BCEG+ equivalent, this page delivers verified electrical parameters, confirmed QSOP-24 package mapping, validated software-configurable unipolar/bipolar operation, and real-world timing behavior under internal/external clock and acquisition modes - all critical for battery-powered sensor interface and industrial monitoring designs.
Technical Context
The MAX1093BCEG+ implements a charge-redistribution SAR architecture with integrated track/hold, supporting both internal (3MHz full-power bandwidth) and external clock modes. Its analog front-end allows dynamic reconfiguration between unipolar (0 to +2.5V) and bipolar (±1.25V) ranges, and between single-ended (CH0–CH3) and pseudo-differential (CH0/CH1, CH2/CH3) input pairs - all controlled via an 8-bit software-configurable control byte.
Conversion is initiated by WR pulses synchronized to CS; internal acquisition mode completes acquisition in ~1µs (with internal clock), while external acquisition enables precise aperture control. The device tri-states INT on CS high and uses HBEN to multiplex 10-bit output across D7–D0/D1/D0 pins, requiring two read cycles for full resolution in standard configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR with ±0.5 LSB INL and ±1 LSB DNL - ensures monotonicity and <0.1% full-scale error over temperature. |
| Sampling Rate | 250ksps maximum - supports real-time capture of signals up to 125kHz (Nyquist-limited) or higher via undersampling. |
| Analog Input Channels | 4 single-ended or 2 pseudo-differential - fixed channel set per MAX1093 family; no expansion beyond CH0–CH3. |
| Reference | +2.5V internal bandgap (±20ppm/°C TC, ±100mV adjust range via REFADJ) - eliminates external reference component and reduces BOM count. |
| Power Consumption | 1.9mA at 250ksps (5.7mW), 2µA in shutdown - enables >1-year battery life in intermittent-sampling IoT nodes. |
| Digital Interface | Byte-wide parallel (8+2) with CS/WR/RD control and HBEN multiplexing - interfaces directly with 8-bit µP buses without glue logic. |
| Supply Range | VDD = +2.7V to +3.6V; VLOGIC = +1.8V to +3.6V - supports mixed-voltage system integration with 1.8V/3.3V controllers. |
Pinout & Package
MAX1093BCEG+ is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), optimized for space-constrained PCB layouts in handheld instrumentation and medical sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High-byte enable control | Selects whether D7–D0 carry LSBs (HBEN=0) or MSBs (HBEN=1); required for full 10-bit readout in two cycles. |
| 2–7 D7–D2 | Three-state bidirectional data I/O | Shared bus lines carrying LSBs (D7–D2) in first read cycle; must be externally terminated to VLOGIC for stable high-Z state. |
| 8 D1/D9 | Multiplexed data line | Outputs D1 when HBEN=0 (LSB cycle), D9 when HBEN=1 (MSB cycle); requires precise timing coordination with RD. |
| 9 D0/D8 | Multiplexed data line | Outputs D0 when HBEN=0, D8 when HBEN=1; LSB/MSB boundary aligns with standard µP port latch behavior. |
| 10 INT | Open-drain interrupt output | Active-low flag signaling conversion completion; tri-stated when CS is high - enables shared interrupt bus architectures. |
| 11 RD | Active-low read strobe | Falling edge latches valid data onto D7–D0; must meet tDO1/tDO2 timing windows relative to CS and HBEN. |
| 12 WR | Active-low write strobe | Rising edge latches control byte; in external acquisition mode, second WR pulse starts conversion - critical for deterministic sampling. |
| 13 CLK | Clock input or mode select | Driven externally (100kHz–4.8MHz) or tied high/low to select internal clock; floating CLK causes undefined behavior. |
| 14 CS | Active-low chip select | Enables digital interface and disables outputs (INT, D7–D0) when high - essential for multi-device bus isolation. |
| 15–18 CH0–CH3 | Analog input channels | Single-ended inputs referenced to COM; support ±0.5 LSB stability requirement during conversion - demands low-noise layout. |
| 19 COM | Analog common reference | Sets zero-code voltage in single-ended mode; must be decoupled and routed away from digital return paths. |
| 20 GND | Analog/digital ground | Single-point connection for AGND/DGND; separation from noisy digital planes prevents INL degradation. |
| 21 REFADJ | Reference buffer control | Connect to VDD to disable internal reference when using external REF; bypass with 0.01µF to GND for stability. |
| 22 REF | Reference input/output | Supplies +2.5V internal reference; requires 4.7µF bulk capacitor to GND - insufficient capacitance causes gain drift. |
| 23 VDD | +3V analog supply | Bypass with 0.1µF ceramic capacitor close to pin; ripple >10mVpk-pk degrades SINAD below 60dB. |
| 24 VLOGIC | Digital I/O supply | Sets output voltage levels (VOH/VOL); mismatch with host µP VIO causes setup/hold violations on WR/RD. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Runtime selection of unipolar/bipolar and single-ended/pseudo-differential modes via control byte - eliminates hardware jumpers and simplifies firmware adaptation. |
| Low-power shutdown | 2µA quiescent current in full power-down mode - enables wake-on-external-trigger architectures with sub-µA average system current. |
| Internal track/hold with 3MHz bandwidth | Supports accurate digitization of fast transients (e.g., motor current spikes) without external THS circuitry - reduces board area and signal path noise. |
| VLOGIC voltage flexibility | +1.8V to +3.6V digital supply range - permits direct interfacing with modern ultra-low-voltage MCUs (e.g., ARM Cortex-M0+) without level shifters. |
| On-chip +2.5V reference | ±20ppm/°C tempco and ±100mV adjustability - achieves <±0.1% total unadjusted error over 0°C to +70°C without calibration. |
Applications
| Industrial Sensor Interface | Patient Vital Sign Monitoring |
|---|---|
Use Scenario: Acquisition of thermocouple, RTD, and pressure sensor outputs in PLC analog input modules. IC Role / Device Role / Timing Role: 10-bit ADC with programmable bipolar input range and 250ksps throughput - digitizes slow-varying industrial signals while rejecting 50/60Hz line noise via synchronous sampling. Use Value: Internal +2.5V reference and software-selectable gain eliminate external precision references and op-amp signal conditioning stages, reducing BOM cost by ≥30%. |
Use Scenario: ECG, SpO₂, and respiration waveform capture in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-power ADC with 4-channel single-ended input - acquires multiple biopotential signals simultaneously with <60dB SINAD at 50kHz input. Use Value: 2µA shutdown current and fast 2µs wake-up enable duty-cycled operation - extends AA battery life to >18 months in clinical-grade wearable devices. |
| Energy Metering Subsystem | Smart Building Environmental Sensing |
Use Scenario: Voltage/current sampling in Class 0.5 electricity meters with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Pseudo-differential ADC with CH0/CH1 and CH2/CH3 channel pairs - measures shunt-based current and transformer-coupled voltage with common-mode rejection >72dB. Use Value: Internal 3MHz track/hold bandwidth supports harmonic analysis up to 50th order (2.5kHz @ 50Hz fundamental) - enables IEC 62053-compliant metrology without oversampling ASICs. |
Use Scenario: Multi-sensor node aggregating temperature, humidity, CO₂, and light levels in HVAC control systems. IC Role / Device Role / Timing Role: 4-channel ADC with software-configurable unipolar input - scans resistive and capacitive sensors sequentially using internal multiplexer, minimizing external switch count. Use Value: Single +3V supply and VLOGIC compatibility with 1.8V MCU I/O reduce power domain complexity - eliminates dedicated LDOs and simplifies PCB layer stackup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, SPI interface, no internal reference - requires external +2.5V ref and level-shifting for 1.8V hosts. | Lower resolution limits dynamic range in vibration monitoring; serial interface increases µP overhead vs. parallel MAX1093BCEG+. | Choose for cost-sensitive, lower-accuracy applications where SPI bus availability outweighs speed and resolution needs. |
| AD7923BRUZ | 12-bit resolution, 1MSPS, 4-channel, SPI interface, internal reference - higher accuracy but 4× higher power (3.5mA @ 1MSPS). | Superior SNR suits audio preamps; excessive speed and resolution overkill for 250ksps industrial sensing - increases thermal load unnecessarily. | Choose when 12-bit precision and faster throughput justify added power and firmware complexity. |
Compared with ADS7822U and AD7923BRUZ, the MAX1093BCEG+ uniquely balances 10-bit accuracy, 250ksps parallel throughput, ultra-low 1.9mA active current, and integrated +2.5V reference - making it optimal for space- and power-constrained embedded systems requiring deterministic timing and minimal external components.
Availability
MAX1093BCEG+ is available at Aetrix Electronics and suitable for industrial sensor interface, portable patient monitoring, energy metering subsystems, and smart building environmental sensing requiring stable component supply and long-term production continuity.
Supply support for MAX1093BCEG+ 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 MAX1093BCEG+ belongs to Maxim's precision data-acquisition ADC product line, designed specifically for battery-powered and space-constrained systems needing low-power, software-flexible analog front-ends with integrated references and parallel interfaces.
FAQ
What is the operating temperature range for MAX1093BCEG+?
The MAX1093BCEG+ is specified for commercial temperature operation from 0°C to +70°C. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The 'B' grade suffix denotes this 0°C to +70°C specification, and thermal performance metrics (e.g., REF tempco, INL drift) are guaranteed within this interval. Operation outside this range may result in parametric noncompliance.
Does MAX1093BCEG+ support pseudo-differential input mode, and how many channel pairs are available?
Yes, MAX1093BCEG+ supports pseudo-differential input mode with exactly two channel pairs: CH0/CH1 and CH2/CH3. This is explicitly defined in the Features list ("4-Channel Single-Ended / 2-Channel Pseudo-Differential") and confirmed in Figure 3b (MAX1093 Simplified Input Structure). Each pair shares a common-mode reference point (COM), and the device samples only the voltage at the positive input (IN+) while holding IN- stable - requiring careful layout and decoupling of the negative channel.
How does the HBEN pin function during data readout of MAX1093BCEG+?
The HBEN pin on MAX1093BCEG+ controls multiplexing of the 10-bit conversion result across the 8-bit data bus. When HBEN = 0, D7–D0 output the 8 LSBs; when HBEN = 1, D7–D0 output the 2 MSBs (D8/D9) alongside D1/D0. Full 10-bit readout therefore requires two consecutive RD cycles with HBEN toggled - a sequence mandated by the parallel (8+2) interface architecture and detailed in the Pin Description and Timing Characteristics sections.
Can MAX1093BCEG+ operate with an external reference, and what is required to disable the internal one?
Yes, MAX1093BCEG+ can use an external reference applied to the REF pin. To disable the internal +2.5V bandgap reference, REFADJ must be connected to VDD - a requirement explicitly stated in the Pin Description and Electrical Characteristics tables. Additionally, the 4.7µF capacitor at REF should be omitted or replaced with appropriate external reference decoupling, and REFADJ must be bypassed with a 0.01µF capacitor to GND regardless of reference source.
What is the minimum acquisition time required before conversion starts in internal acquisition mode for MAX1093BCEG+?
In internal acquisition mode, MAX1093BCEG+ requires approximately 1µs between the WR pulse and start of conversion when using the internal clock, as documented in the Detailed Description section. This timing is fixed by the internal state machine and independent of external clock frequency. For external clock mode with internal acquisition, acquisition time scales with clock period - e.g., at 4.8MHz, it equals four clock cycles (~833ns) - but the datasheet specifies 1µs as the typical worst-case value across conditions.
MAX1093BCEG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 10
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1093BCEG+ FAQ
1.How can I place an order for MAX1093BCEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1093BCEG+ 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 MAX1093BCEG+ reliable?
The price and inventory of MAX1093BCEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1093BCEG+ is usually 5 days.
3.What payment methods are accepted for MAX1093BCEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1093BCEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1093BCEG+?
MAX1093BCEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1093BCEG+ 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 MAX1093BCEG+?
For technical support, including MAX1093BCEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1093BCEG+ requirements.
6.How does Aetrix verify that MAX1093BCEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1093BCEG+ 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 MAX1093BCEG+ meets industry standards.
7.What is the process for return or replacement of MAX1093BCEG+?
All MAX1093BCEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1093BCEG+, 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 MAX1093BCEG+ part is unused and in its original packaging.
Return procedure for MAX1093BCEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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