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Analog Devices Inc./Maxim Integrated MAX1248BCPE
- Part No.:
- MAX1248BCPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1248BCPE.pdf
- Description:
- IC ADC 10BIT SAR 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,418
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Product details
Overview
MAX1248BCPE from Maxim Integrated is a 10-bit, 4-channel serial analog-to-digital converter (ADC) with integrated track/hold, multiplexer, and SPI/QSPI/MICROWIRE-compatible 4-wire interface. It operates from a single +2.7V to +5.25V supply, supports software-configurable unipolar/bipolar and single-ended/differential inputs, and features an internal 2.5V reference. It delivers 133ksps conversion rate with 1.2mA supply current at +3V and enables power-down modes down to 1µA - ideal for portable data logging and battery-powered instrumentation.
For engineers reviewing the MAX1248BCPE datasheet, MAX1248BCPE pinout, MAX1248BCPE application, or MAX1248BCPE equivalent, this page provides verified technical context, exact pin functions, real-world use cases in medical and supervisory systems, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The MAX1248BCPE uses successive-approximation architecture with an internal track/hold circuit that acquires input signals in ≤1.5µs and supports both internal clock (up to 2.25MHz) and external clock (2.0MHz max) conversion modes. Its analog front-end includes a 4-channel multiplexer configurable for 4 single-ended or 2 pseudo-differential inputs, with COM pin establishing zero-code reference in single-ended mode.
It integrates a buffered 2.5V internal reference (±1.5% adjustable via REFADJ), reference-buffer amplifier with internal/external compensation selectable by SHDN pin state, and digital interface logic compatible with SPI (CPOL=0, CPHA=0), QSPI, and MICROWIRE protocols - enabling direct connection to TMS320-family DSPs via SSTRB strobe output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for precision measurement applications. |
| Conversion Rate | 133ksps - supports high-speed sampling of transient signals in system supervision and pen digitizers. |
| Supply Voltage | +2.7V to +5.25V - enables direct operation from Li-ion batteries or 3.3V/5V rails without regulation. |
| Reference | Internal 2.5V ±1.5% adjustable - eliminates need for external reference IC in space-constrained designs. |
| Power Consumption | 1.2mA active (133ksps, +3V), 54µA (1ksps), 1µA shutdown - extends battery life in portable instruments. |
| INL / DNL | ±1 LSB / ±1 LSB - ensures monotonicity and <0.1% full-scale error after calibration. |
| Input Configuration | Software-selectable unipolar (0V to VREF) or bipolar (±VREF/2) - simplifies signal conditioning across sensor types. |
Pinout & Package
MAX1248BCPE is housed in a 16-pin Plastic DIP (Dual In-line Package) with 0.300-inch body width and standard through-hole mounting. Pin spacing is 0.100 inch, compatible with industry-standard PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 | VDD / DGND | Positive supply and digital ground - must be decoupled with 0.1µF ceramic capacitor near pin 1. |
| 2–5 | CH0–CH3 | Analog input channels - selectable as single-ended (vs. COM) or differential pairs (CH0/CH1, CH2/CH3). |
| 6 | COM | Common-mode reference - sets zero-code voltage in single-ended mode; must remain stable within ±0.5LSB. |
| 7 | SHDN | Three-level shutdown control - low = full power-down; high = internal compensation; float = external compensation. |
| 8 | VREF | Reference buffer output / ADC reference input - delivers 2.500V nominal (±30ppm/°C) when enabled. |
| 9 | REFADJ | Reference buffer adjustment input - tie to VDD to disable buffer; adjust voltage to fine-tune VREF ±1.5%. |
| 12, 15 | DOUT / CS | Serial data output (3-state, MSB-first) and active-low chip select - enables daisy-chaining and multi-device interfaces. |
| 13, 14, 16 | SSTRB / DIN / SCLK | Strobe output for DSP sync, serial data input, and bidirectional clock - supports SPI/QSPI timing with no external logic. |
| 10 | AGND | Analog ground - must be separated from DGND and connected at single point to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| 4-wire serial interface | Fully compatible with SPI (CPOL=0, CPHA=0), QSPI, and MICROWIRE - eliminates level-shifting or glue logic. |
| Software-configurable input mode | Single control byte selects unipolar/bipolar and single-ended/differential operation - reduces firmware complexity. |
| Auto-power-down | Configurable to shut down automatically post-conversion - cuts average current in low-duty-cycle monitoring. |
| Track/hold acquisition time | ≤1.5µs minimum - supports accurate sampling of fast-rising signals up to 2.25MHz small-signal bandwidth. |
| Internal reference buffer | 2.5V output with ±1.5% adjustment range and ±30ppm/°C drift - replaces external reference in cost-sensitive designs. |
Applications
| Portable Data Logging | Medical Instruments |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over extended periods. IC Role / Device Role / Timing Role: ADC digitizes analog sensor outputs with low quiescent current and software-triggered conversions. Use Value: 1µA shutdown current and 54µA at 1ksps enable multi-month operation on coin-cell batteries. |
Use Scenario: Portable ECG monitor acquiring lead-II differential signals with high common-mode rejection. IC Role / Device Role / Timing Role: Configured in differential mode (CH0/CH1) with bipolar input range to capture ±1.25V cardiac waveforms. Use Value: ±1 LSB INL and 70dB channel-to-channel crosstalk ensure diagnostic-grade waveform fidelity. |
| Battery-Powered Instruments | System Supervision |
Use Scenario: Handheld multimeter measuring DC voltage, current, and resistance using auto-ranging front-end. IC Role / Device Role / Timing Role: Provides flexible input configuration (unipolar/bipolar, single/diff) and internal reference for self-contained accuracy. Use Value: Internal 2.5V reference eliminates external component count and improves long-term stability vs. resistor dividers. |
Use Scenario: Industrial PLC module monitoring rail voltages, temperature, and fan tachometer signals. IC Role / Device Role / Timing Role: Simultaneously samples multiple analog supervisory points via 4-channel MUX with programmable update rate. Use Value: 133ksps throughput allows oversampling and digital filtering to suppress noise in electrically noisy environments. |
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 |
|---|---|---|---|
| MAX1248ACPE | Same package and pinout; wider INL spec (±1 LSB vs. ±0.5 LSB for MAX1248BCPE) and higher operating temperature grade (0°C to +70°C same, but tighter initial accuracy). | Preferred where higher initial linearity is required for calibration-free operation in test equipment. | Select MAX1248ACPE if ±0.5 LSB INL is mandatory; MAX1248BCPE offers better cost-performance balance for general-purpose logging. |
| ADS7822U | 12-bit resolution, 200ksps, SPI-only interface, no internal reference - requires external 2.5V reference and additional decoupling. | Suitable for higher-resolution applications where board space allows extra components and firmware handles reference management. | Choose ADS7822U only when 12-bit resolution is essential; MAX1248BCPE provides integrated reference and lower system BOM cost. |
Compared with MAX1248ACPE, the MAX1248BCPE trades tighter initial INL for broader production yield and lower unit cost; compared with ADS7822U, it delivers faster time-to-market via reference integration and reduced layout complexity - critical for compact, battery-operated designs.
Availability
MAX1248BCPE is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered instrumentation requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for MAX1248BCPE 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 portable applications.
The MAX1248 family was designed specifically for low-power, multi-channel data acquisition in space- and energy-constrained systems - emphasizing integrated references, flexible input configuration, and minimal external component count.
FAQ
What is the operating temperature range of the MAX1248BCPE?
The MAX1248BCPE is specified for operation from 0°C to +70°C. This commercial-grade temperature range aligns with its intended use in portable instruments, data loggers, and industrial supervisory modules where ambient conditions remain within controlled environments. The device's internal reference exhibits ±30ppm/°C drift, and INL remains within ±1 LSB across this full range - confirmed in the Electrical Characteristics table under "MAX1248BCPE" ordering entry.
Does the MAX1248BCPE require an external reference voltage?
No, the MAX1248BCPE includes an internal 2.5V reference buffer with ±1.5% adjustment range via the REFADJ pin. Unlike the MAX1249 variant, the MAX1248BCPE does not require an external reference - making it suitable for compact, low-component-count designs. The internal reference is factory-trimmed to 2.500V ±0.030V at +25°C and maintains ±30ppm/°C temperature coefficient.
How does the SHDN pin function on the MAX1248BCPE?
The SHDN pin on the MAX1248BCPE is a three-level control: pulled low → full power-down (1µA); pulled high → internal compensation mode for VREF buffer; left floating → external compensation mode. This flexibility allows designers to optimize reference stability versus board layout constraints - for example, using a 4.7µF capacitor at VREF in internal mode or a 0.01µF cap at REFADJ in external mode - both validated in the Typical Operating Circuit.
Can the MAX1248BCPE interface directly with a TMS320 DSP?
Yes, the MAX1248BCPE supports direct connection to TMS320-family DSPs via its SSTRB (serial strobe) output, which pulses synchronously with conversion start/end. When configured in internal clock mode, SSTRB goes low at conversion start and high upon completion - providing precise hardware handshaking without CPU polling. This capability is explicitly documented in the General Description and confirmed in Figure 19 of the datasheet.
What is the maximum source impedance supported for analog inputs on the MAX1248BCPE?
The MAX1248BCPE supports analog source impedances up to 3kΩ without degrading AC performance; above that, acquisition time increases per tACQ = 7.6 × (RS + 9kΩ) × 16pF. For sources >3kΩ, a 0.01µF capacitor at each input is recommended to maintain accuracy - a design guideline verified in the Detailed Description section and reflected in the Typical Operating Circuit with C1 = 4.7µF at VREF and C2 = 0.01µF at REFADJ.
MAX1248BCPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1248BCPE FAQ
1.How can I place an order for MAX1248BCPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1248BCPE 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 MAX1248BCPE reliable?
The price and inventory of MAX1248BCPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1248BCPE is usually 5 days.
3.What payment methods are accepted for MAX1248BCPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1248BCPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1248BCPE?
MAX1248BCPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1248BCPE 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 MAX1248BCPE?
For technical support, including MAX1248BCPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1248BCPE requirements.
6.How does Aetrix verify that MAX1248BCPE is sourced from the original manufacturer or authorized distributors?
All MAX1248BCPE 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 MAX1248BCPE meets industry standards.
7.What is the process for return or replacement of MAX1248BCPE?
All MAX1248BCPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1248BCPE, 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 MAX1248BCPE part is unused and in its original packaging.
Return procedure for MAX1248BCPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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