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Analog Devices Inc./Maxim Integrated MAX1248ACEE+
- Part No.:
- MAX1248ACEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1248ACEE+.pdf
- Description:
- IC ADC 10BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,552
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Product details
Overview
MAX1248ACEE+ from Maxim Integrated is a 10-bit, 4-channel serial analog-to-digital converter (ADC) with integrated track/hold, multiplexer, and internal 2.5V reference. It operates from a single +2.7V to +5.25V supply, supports software-configurable unipolar/bipolar and single-ended/differential inputs, and achieves 133ksps conversion rate using an external 2MHz clock. It is used in portable data loggers for battery-efficient signal digitization of sensor outputs.
For engineers reviewing the MAX1248ACEE+ datasheet, MAX1248ACEE+ pinout, MAX1248ACEE+ application, or MAX1248ACEE+ equivalent, this page delivers verified electrical specs, QSOP-16 package details, SPI/QSPI/MICROWIRE-compatible timing, shutdown current down to 1µA, and real-world use cases in medical instruments and system supervision.
Technical Context
The MAX1248ACEE+ employs successive-approximation register (SAR) architecture with an integrated track/hold circuit that acquires input signals within 1.5µs and supports up to 2.25MHz small-signal bandwidth. Its analog front-end allows pseudo-differential sampling across CH0–CH3 with COM-referenced zero-code alignment.
It features dual clock modes: external serial clock (2MHz max, 15 clocks/conversion) for deterministic timing, or internal clock (2.25MHz typ.) enabling flexible readout independent of processor clock. The SHDN pin provides three-level control-low for full power-down, high for internal compensation, float for external compensation-enabling precise reference-buffer management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for medium-precision sensor digitization |
| Conversion Rate | 133ksps - supports real-time sampling of audio-band and industrial control signals |
| Supply Voltage | +2.7V to +5.25V - enables direct operation from Li-ion, 3.3V, or 5V rails without LDO |
| Reference | Internal 2.5V ±1.5% adjustable - eliminates need for external reference IC in space-constrained designs |
| Power Consumption | 1.2mA at 133ksps / 54µA at 1ksps / 1µA in shutdown - extends battery life in portable instrumentation |
| INL | ±0.5 LSB - ensures monotonicity and <0.05% full-scale linearity error over temperature |
| Interface | 4-wire SPI/QSPI/MICROWIRE - connects directly to microcontrollers without level shifters or glue logic |
Pinout & Package
MAX1248ACEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm), occupying the same PCB footprint as an 8-pin SOIC-ideal for compact, high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts +2.7V to +5.25V; powers analog and digital sections from single rail |
| CH0–CH3 | Analog input channels | Software-selectable 4 single-ended or 2 differential inputs; input range 0V to VREF (unipolar) or ±VREF/2 (bipolar) |
| COM | Analog common reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5 LSB |
| SHDN | Three-state shutdown control | Pull low for full power-down (1µA), high for internal compensation, float for external compensation |
| VREF | Reference buffer output / ADC reference | 2.500V nominal output (±30ppm/°C); adjustable via REFADJ; bypassed with 4.7µF capacitor |
| REFADJ | Reference buffer adjustment input | Enables ±1.5% VREF tuning; tie to VDD to disable internal buffer (for external reference use) |
| SCLK | Serial clock input | Clocks data in/out; in external mode, also drives SAR conversion (40–60% duty cycle required) |
| CS | Active-low chip select | Enables serial interface; DOUT and SSTRB go high-Z when CS = high |
| DIN | Serial data input | Accepts 8-bit control byte on SCLK rising edge; first '1' bit defines MSB start |
| DOUT | Serial data output | Outputs 10-bit result MSB-first on SCLK falling edge; high-Z when CS = high |
| SSTRB | Serial strobe output | In internal clock mode: low during conversion, high when complete; in external mode: pulses high for one SCLK period before MSB |
| AGND / DGND | Analog and digital ground | Separate pins minimize noise coupling; require star grounding at single point |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Single-ended or differential, unipolar or bipolar - selected per conversion via control byte, no hardware changes needed |
| Low-power adaptive operation | Auto-shutdown after conversion + instant wake-on-CS - cuts average current to <60µA at reduced sampling rates |
| Reference flexibility | Internal 2.5V reference with ±1.5% trim range (REFADJ) - eliminates external reference while supporting calibration offsets |
| QSOP-16 footprint compatibility | Same board area as 8-pin SOIC - enables drop-in upgrade from legacy 8-pin ADCs without layout revision |
| TMS320-family DSP interface support | SSTRB output synchronized to conversion start/end - allows direct handshake with TI C2000 and C5000 series DSPs |
Applications
| Portable Data Logging | Medical Instruments |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over 72-hour intervals. IC Role / Device Role / Timing Role: ADC digitizes conditioned analog outputs from MEMS sensors; internal reference ensures consistent scaling across charge cycles. Use Value: 54µA at 1ksps and 1µA shutdown current extend coin-cell life beyond 1 year without recharging. |
Use Scenario: Handheld ECG monitor acquiring lead-II differential signals at 1ksps with real-time waveform display. IC Role / Device Role / Timing Role: Pseudo-differential front-end samples CH0/CH1 pair; COM referenced to right-leg drive; 10-bit resolution captures R-wave amplitude variations ≥0.5mV. Use Value: ±0.5 LSB INL and 66dB SINAD meet IEC 60601-2-27 accuracy requirements for diagnostic-grade analog acquisition. |
| Battery-Powered Instruments | System Supervision |
Use Scenario: Field-deployed multimeter measuring DC voltage, current, and resistance with auto-ranging and LCD display. IC Role / Device Role / Timing Role: Configures CH2/CH3 as differential inputs for shunt-based current sensing; uses internal reference for ratio-metric accuracy against supply drift. Use Value: Single +3.3V supply operation and 1.2mA active current enable >100 hours runtime on two AA cells. |
Use Scenario: Industrial PLC module monitoring 4 analog inputs (voltage, current, thermocouple, RTD) for fault detection and alarm triggering. IC Role / Device Role / Timing Role: Multiplexes all four channels sequentially under firmware control; SHDN pin cycled between readings to minimize thermal drift and self-heating error. Use Value: Channel-to-channel offset matching of ±0.05 LSB ensures <0.1% cross-channel gain error critical for comparative diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 200ksps, no internal reference, requires external 2.5V ref | Lacks bipolar mode and software-configurable input types; suited only for unipolar, single-ended use | Select if 8-bit precision suffices and board already includes 2.5V reference; avoid for bipolar or differential needs |
| MAX11100ETE+ | 12-bit resolution, 1MSPS, internal 4.096V ref, SPI-only (no MICROWIRE/QSPI) | Higher speed and resolution but consumes 3.5mA active current; larger 16-pin TQFN package | Choose for higher accuracy or faster sampling; not suitable for ultra-low-power or legacy MICROWIRE host systems |
Compared with ADS7822U and MAX11100ETE+, the MAX1248ACEE+ uniquely balances 10-bit precision, internal reference adjustability, triple interface compatibility (SPI/QSPI/MICROWIRE), and sub-1µA shutdown-making it optimal for cost-sensitive, battery-operated, multi-mode data acquisition where layout space and supply simplicity are constrained.
Availability
MAX1248ACEE+ is available at Aetrix Electronics and suitable for portable data logging, medical instruments, and battery-powered instruments requiring stable component supply across long production lifecycles.
Supply support for MAX1248ACEE+ 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 industrial, medical, and communications applications.
The MAX1248ACEE+ belongs to Maxim's low-power serial ADC product line, engineered specifically for battery-constrained, space-limited systems needing reliable 10-bit digitization with minimal external components and flexible interface support.
FAQ
What is the operating temperature range for MAX1248ACEE+?
The MAX1248ACEE+ is rated for 0°C to +70°C ambient operation, as confirmed by its ordering code suffix "CE" and the device's qualification testing per Maxim's commercial-grade specifications. This range covers standard industrial and consumer environments but excludes extended automotive or military temperature grades.
Does MAX1248ACEE+ require an external reference capacitor?
Yes - the MAX1248ACEE+ requires a 4.7µF capacitor at the VREF pin when using the internal reference, as specified in the Typical Operating Circuit and Electrical Characteristics tables. Omitting this capacitor causes reference instability and degrades INL performance beyond ±1 LSB.
Can MAX1248ACEE+ interface directly with a TMS320C28x DSP?
Yes - the MAX1248ACEE+ SSTRB output is explicitly designed for direct connection to TMS320-family DSPs. In internal clock mode, SSTRB goes low at conversion start and high upon completion, enabling hardware-triggered DMA reads without polling or timer overhead.
How does the SHDN pin function in MAX1248ACEE+?
The MAX1248ACEE+ SHDN pin is three-state: pulled low → full power-down (1µA); pulled high → internal compensation mode (reference buffer enabled, VREF stable); left floating → external compensation mode (REFADJ controls loop stability). All states retain register contents and require no reinitialization on wake-up.
What is the minimum acquisition time for MAX1248ACEE+?
The guaranteed minimum acquisition time (tACQ) for MAX1248ACEE+ is 1.5µs, as specified in the Electrical Characteristics table under "Track/Hold Acquisition Time". This value holds regardless of source impedance when using the internal clock mode and is critical for maintaining 10-bit accuracy at full 133ksps throughput.
MAX1248ACEE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- 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 ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1248ACEE+ FAQ
1.How can I place an order for MAX1248ACEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1248ACEE+ 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 MAX1248ACEE+ reliable?
The price and inventory of MAX1248ACEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1248ACEE+ is usually 5 days.
3.What payment methods are accepted for MAX1248ACEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1248ACEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1248ACEE+?
MAX1248ACEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1248ACEE+ 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 MAX1248ACEE+?
For technical support, including MAX1248ACEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1248ACEE+ requirements.
6.How does Aetrix verify that MAX1248ACEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1248ACEE+ 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 MAX1248ACEE+ meets industry standards.
7.What is the process for return or replacement of MAX1248ACEE+?
All MAX1248ACEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1248ACEE+, 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 MAX1248ACEE+ part is unused and in its original packaging.
Return procedure for MAX1248ACEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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