My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1246BCEE+T
- Part No.:
- MAX1246BCEE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1246BCEE+T.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,984
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1246BCEE+T from Maxim Integrated is a 12-bit, 4-channel serial analog-to-digital converter (ADC) with integrated track/hold, software-configurable unipolar/bipolar and single-ended/differential inputs, internal 2.5V reference, and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. It operates from a single +2.7V to +3.6V supply, delivers 133ksps conversion rate, and draws only 1.2mA at full speed-enabling high-precision data acquisition in battery-powered medical instruments and portable data loggers.
For engineers reviewing the MAX1246BCEE+T datasheet, MAX1246BCEE+T pinout, MAX1246BCEE+T application, or MAX1246BCEE+T equivalent, key selection considerations include its QSOP-16 package, ±1 LSB INL accuracy over 0°C to +70°C, internal reference buffer with ±1.5% adjustment range, and shutdown current of <1µA-critical for low-power embedded sensing systems requiring stable timing and minimal quiescent draw.
Technical Context
The MAX1246BCEE+T implements successive-approximation register (SAR) architecture with an integrated track/hold circuit that acquires input signals in ≤1.5µs and supports both internal clock (up to 7.5MHz) and external serial clock (up to 2MHz) operation. Its analog front-end allows software-selectable input configurations: 4-channel single-ended or 2-channel differential, with common-mode range from AGND to VDD.
It features a hard-wired SHDN pin enabling three-level control (full shutdown, fast power-down, or reference compensation mode), automatic power-up on serial interface access, and a serial strobe output (SSTRB) synchronized to conversion start/end-enabling direct interfacing with TMS320-family DSPs without glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.0244% of full-scale range for precise sensor digitization |
| INL (Integral Nonlinearity) | ±1 LSB max - ensures monotonicity and ≤0.024% absolute voltage error across full code range |
| Conversion Rate | 133ksps (external clock) - supports real-time sampling of audio-band and control-loop signals |
| Supply Current | 1.2mA @ 133ksps / 3V - enables >10-hour runtime on a 12mAh coin cell in continuous acquisition |
| Shutdown Current | 1µA - reduces system standby power by >99% versus active mode, critical for wake-on-event designs |
| Reference | Internal 2.500V ±0.8% (25°C), ±30ppm/°C TC - eliminates external reference component and layout area |
| Input Range | 0V to VREF (unipolar) or ±VREF/2 (bipolar) - accommodates both ground-referenced and AC-coupled sensor outputs |
Pinout & Package
MAX1246BCEE+T is housed in a 16-pin QSOP package (5.3mm × 10.2mm), occupying the same PCB footprint as an 8-pin SOIC-enabling compact, drop-in upgrades in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +2.7V to +3.6V; powers analog and digital sections; requires local 0.1µF bypass to DGND |
| CH0–CH3 (Pins 2–5) | Analog input channels | Software-selectable as single-ended (vs. COM) or differential pairs (CH0/CH1, CH2/CH3); max input = AGND–0.3V to VDD+0.3V |
| COM (Pin 6) | Analog ground reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5 LSB; connects to AGND plane |
| SHDN (Pin 7) | Three-state shutdown control | Pull low → full shutdown (1µA); float → external REFADJ compensation; pull high → internal compensation |
| AGND (Pin 10) | Analog ground return | Separate from DGND; must tie to quiet analog ground plane; star-point connection recommended |
| DGND (Pin 11) | Digital ground return | Return path for digital I/O; connect to AGND at single point near VDD decoupling capacitor |
| VREF (Pin 8) | Reference buffer output / ADC reference input | 2.500V nominal output (MAX1246 only); bypassed with 4.7µF capacitor; adjustable via REFADJ pin |
| REFADJ (Pin 9) | Reference buffer gain control | Adjusts VREF ±1.5%; tie to VDD to disable internal reference buffer (for external reference use) |
| SCLK (Pin 16) | Serial clock input | Drives data transfer and (in external mode) SAR conversion; 40–60% duty cycle required; max 2MHz |
| CS (Pin 15) | Active-low chip select | Enables serial interface; DOUT goes high-Z when CS = high; defines control byte start bit |
| DIN (Pin 14) | Serial data input | Accepts 8-bit control byte on SCLK rising edge; format includes channel select, unipolar/bipolar, SGL/DIF, PD1/PD0 |
| DOUT (Pin 12) | Serial data output | Outputs 12-bit result MSB-first on SCLK falling edge; high-Z when CS = high; compatible with SPI/QSPI |
| SSTRB (Pin 13) | Serial strobe output | Pulses high before MSB in external clock mode; goes low at conversion start and high at completion in internal mode |
Key Features
| Feature | Design Value |
|---|---|
| 4-wire SPI/QSPI/MICROWIRE interface | Direct connection to microcontrollers without level shifters or protocol translation-reduces BOM and firmware overhead |
| Software-configurable input modes | Single control byte selects unipolar/bipolar and single-ended/differential per conversion-enables dynamic signal routing in firmware |
| Internal 2.5V reference with ±1.5% adjustability | Eliminates need for external precision reference IC and associated passive components-saves 3–4 mm² PCB area |
| Three-level SHDN pin control | Hardware-selectable power states (full shutdown, fast power-down, reference compensation) enable fine-grained energy management |
| QSOP-16 package (same footprint as 8-pin SO) | Allows migration from legacy 8-pin ADCs without PCB redesign-accelerates time-to-market for cost-sensitive upgrades |
Applications
| Portable Data Logging | Medical Instruments |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 100Hz intervals over 7-day deployments. IC Role / Device Role / Timing Role: Primary ADC acquiring four analog sensor outputs sequentially; internal reference ensures consistent scaling across temperature drift. Use Value: 1.2mA active current and 1µA shutdown draw extend battery life beyond 10,000 measurements per charge-meeting UL2050 field-deployment requirements. |
Use Scenario: Handheld ECG monitor digitizing lead-II differential signals with programmable gain and baseline correction. IC Role / Device Role / Timing Role: Dual-channel differential ADC capturing cardiac waveforms at 1ksps; bipolar mode supports ±1.25V input range matching electrode output swing. Use Value: ±1 LSB INL and 73dB SINAD preserve diagnostic fidelity of ST-segment morphology-supporting FDA Class II device certification. |
| Pen Digitizers | Battery-Powered Instruments |
|
Use Scenario: Active stylus interface in tablet PCs measuring X/Y position via capacitive grid voltage gradients. IC Role / Device Role / Timing Role: High-speed 4-channel ADC sampling four analog sense lines synchronously; track/hold acquisition time ≤1.5µs minimizes positional jitter. Use Value: 133ksps throughput enables sub-millisecond coordinate updates at 100+ Hz reporting rate-meeting Wacom AES latency benchmarks. |
Use Scenario: Field-portable multimeter acquiring DC voltage, AC RMS, and resistance with auto-ranging and hold functionality. IC Role / Device Role / Timing Role: Precision ADC providing 12-bit resolution across 0.1mV to 1000V ranges; internal reference eliminates calibration drift between ranges. Use Value: ±0.5 LSB offset error and ±0.25 ppm/°C gain TC ensure 0.05% basic accuracy over 0°C–50°C operating range-meeting IEC 61010-1 CAT II safety specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200ksps, single-supply +2.7V–+5.25V, no internal reference, requires external REF | Lacks integrated reference and shutdown control; needs external 2.5V ref and power management logic | Choose when higher speed (200ksps) is prioritized over board area and power simplicity |
| MAX11100ETE+ | 12-bit, 1MSPS, internal reference, SPI interface, 16-pin TQFN (4mm × 4mm) | Higher speed and smaller footprint, but 1.8V–3.6V supply range excludes 5V systems; no SSTRB output | Choose for space-constrained, high-throughput designs where DSP strobe sync is not required |
Compared with ADS7822U and MAX11100ETE+, the MAX1246BCEE+T uniquely combines internal 2.5V reference, three-level SHDN control, and SSTRB synchronization in QSOP-16-making it optimal for low-power, pin-limited, DSP-coupled data acquisition where reference stability and power sequencing matter most.
Availability
MAX1246BCEE+T is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1246BCEE+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 applications.
The MAX1246/MAX1247 family was designed for ultra-low-power, high-accuracy data acquisition in size- and energy-constrained systems-emphasizing integrated references, flexible input configuration, and minimal external component count.
FAQ
What is the operating temperature range for MAX1246BCEE+T?
The MAX1246BCEE+T is specified for operation from 0°C to +70°C. This commercial-grade temperature range is validated per the device's datasheet test conditions and applies to all electrical parameters including INL (±1 LSB), supply current (1.2mA typ), and reference voltage (2.500V ±0.8%). It is not rated for extended industrial or automotive temperature ranges.
Does MAX1246BCEE+T require an external reference voltage?
No, the MAX1246BCEE+T includes an internal 2.500V reference buffer and does not require an external reference. The internal reference is factory-trimmed to ±0.8% at +25°C and exhibits ±30ppm/°C temperature coefficient. An external 4.7µF capacitor at VREF and 0.047µF at REFADJ are required for stability and adjustment.
How does the SHDN pin function on MAX1246BCEE+T?
The SHDN pin on MAX1246BCEE+T provides three distinct operating states: pulled low → full power-down (1µA supply current); left floating → external compensation mode for REFADJ; pulled high → internal compensation mode. This hardware-controlled flexibility enables deterministic power state transitions without firmware intervention.
Can MAX1246BCEE+T interface directly with a TMS320 DSP?
Yes, MAX1246BCEE+T supports direct connection to TMS320-family DSPs via its SSTRB (serial strobe) output. In internal clock mode, SSTRB asserts low at conversion start and high at completion; in external mode, it pulses high for one clock period-providing precise hardware synchronization for DMA-triggered data capture without CPU polling.
What is the maximum source impedance supported for analog inputs on MAX1246BCEE+T?
The MAX1246BCEE+T specifies a maximum acquisition time of 1.5µs for source impedances ≤1kΩ. For higher impedances, the acquisition time increases per tACQ = 9 × (RS + 9kΩ) × 16pF. To maintain accuracy with RS > 1kΩ, a 0.01µF capacitor should be placed at each analog input to limit bandwidth and prevent droop-induced errors.
MAX1246BCEE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- 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 ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1246BCEE+T FAQ
1.How can I place an order for MAX1246BCEE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1246BCEE+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 MAX1246BCEE+T reliable?
The price and inventory of MAX1246BCEE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1246BCEE+T is usually 5 days.
3.What payment methods are accepted for MAX1246BCEE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1246BCEE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1246BCEE+T?
MAX1246BCEE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1246BCEE+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 MAX1246BCEE+T?
For technical support, including MAX1246BCEE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1246BCEE+T requirements.
6.How does Aetrix verify that MAX1246BCEE+T is sourced from the original manufacturer or authorized distributors?
All MAX1246BCEE+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 MAX1246BCEE+T meets industry standards.
7.What is the process for return or replacement of MAX1246BCEE+T?
All MAX1246BCEE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1246BCEE+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 MAX1246BCEE+T part is unused and in its original packaging.
Return procedure for MAX1246BCEE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1246BCEE+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…
