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Analog Devices Inc./Maxim Integrated MAX11169EUB+
- Part No.:
- MAX11169EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX11169EUB+.pdf
- Description:
- IC ADC 16BIT SAR 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,767
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Product details
Overview
MAX11169EUB+ from Maxim Integrated is a 16-bit, 250ksps successive approximation register (SAR) analog-to-digital converter with true bipolar ±5V input range, integrated 4.096V low-drift reference (±7ppm/°C), and SPI-compatible serial interface. It operates from a single 5V analog supply and 2.3V–5.25V digital supply, delivering 93dB SNR and –101dB THD at 10kHz for precision industrial data acquisition.
For engineers reviewing the MAX11169EUB+ datasheet, MAX11169EUB+ pinout, MAX11169EUB+ application, or MAX11169EUB+ equivalent, this page provides verified specifications, validated pin functions, confirmed operating modes (CS/daisy-chain), real-world noise performance (0.5 LSBRMS input-referred), and documented thermal drift behavior across –40°C to +85°C.
Technical Context
The MAX11169EUB+ implements a pseudo-differential sampling architecture with internal track-and-hold, enabling accurate 1µs acquisition of high-impedance sources without external op-amp buffering in many cases. Its patented charge-pump input stage supports direct sampling while maintaining ±0.5 LSB INL (typ) and guaranteed no-missing-codes performance.
It features dual-supply operation (VDD = 4.75–5.25V, OVD D = 2.3–5.25V), programmable interface mode selection via SDI at CNVST rising edge, and optional busy-indicator signaling on SDO to simplify system timing synchronization in multichannel daisy-chain configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no-missing-codes - ensures monotonicity and eliminates code gaps in critical measurement systems. |
| Throughput Rate | 250ksps maximum - supports real-time sampling of fast transients without pipeline latency. |
| SNR / THD | 93dB SNR and –101dB THD at 10kHz - enables high-fidelity digitization of low-distortion sensor signals. |
| Analog Input Range | True bipolar ±5V (10VP-P) - accepts both positive and negative voltages referenced to AIN-, simplifying signal conditioning. |
| Reference | Integrated 4.096V ±7ppm/°C reference with internal buffer - eliminates external reference IC and saves PCB area and BOM cost. |
| Power Consumption | 33mW at 250ksps, 10µA shutdown - suitable for power-constrained portable or battery-backed instrumentation. |
| Digital Interface | SPI/QSPI/MICROWIRE/DSP-compatible serial interface - interoperable with common microcontrollers and DSPs without protocol translation. |
Pinout & Package
The MAX11169EUB+ is housed in a 10-pin µMAX package (3mm × 5mm), optimized for space-constrained PCB layouts in industrial and medical instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Internal reference bypass terminal | Must be decoupled with ≥10µF X5R/X7R capacitor close to pin - stabilizes reference voltage and suppresses noise-induced errors. |
| 2 - VDD | Analog power supply (4.75–5.25V) | Requires local 0.1µF + board-level 10µF bypassing - powers analog core and reference buffer; noise here directly impacts INL/SNR. |
| 3 - AIN+ | Positive pseudo-differential analog input | Accepts –5.1V to +5.1V relative to GND; sampled differentially against AIN–; supports overvoltage clamp up to ±7V. |
| 4 - AIN– | Negative pseudo-differential analog input | Range limited to –0.1V to +0.1V; defines common-mode baseline; enables remote-sense grounding for improved CMR. |
| 5 - GND | Analog and digital ground reference | Single-point connection recommended; separates analog/digital return paths to minimize coupling of digital switching noise. |
| 6 - CNVST | Conversion start and interface mode select | Rising edge initiates conversion; logic level of SDI at this edge selects CS or daisy-chain mode - critical for multichannel sync. |
| 7 - SDO | Serial data output with optional busy indicator | Outputs MSB-first 16-bit result; asserts busy bit when enabled - eliminates need for external timeout circuits in timing-critical systems. |
| 8 - SCLK | Serial clock input | Drives data out on falling edge; timing varies by OVD D voltage (14–30ns min period) - must meet setup/hold requirements per mode. |
| 9 - SDI | Serial data input / mode control | Low at CNVST rising edge enables daisy-chain; high enables CS mode; also used as chip-select enable in CS mode. |
| 10 - OVDD | Digital I/O supply (2.3–5.25V) | Independent of VDD - allows interfacing with 2.5V/3.3V/5V logic without level shifters; requires 0.1µF + 10µF bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| Pseudo-differential input with 6MHz small-signal bandwidth | Enables accurate 1µs acquisition of multiplexed sensor channels without external amplifiers in many applications. |
| Patented charge-pump input architecture | Allows direct sampling of high-impedance sources (e.g., RTDs, thermocouples) while maintaining 16-bit linearity. |
| Integrated reference with ±7ppm/°C TC and internal buffer | Eliminates external reference IC and buffer op-amp, reducing component count, layout complexity, and temperature-induced gain drift. |
| Configurable SPI-compatible interface with busy indicator | Supports CS and daisy-chain modes; busy bit on SDO removes dependency on fixed conversion-time timers in real-time systems. |
| Input overvoltage protection (±20mA clamp) | Protects against transient faults up to ±7V at AIN+, enabling robust front-end design without additional TVS or current-limiting circuitry. |
| Low 0.5 LSBRMS input-referred noise | Preserves dynamic range in low-amplitude signal measurements (e.g., strain gauge outputs), supporting sub-µV resolution. |
Applications
| Industrial Process Control | Data Acquisition Systems |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow in PLC-based factory automation with ±10V legacy sensor interfaces. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized multi-channel analog inputs at 250ksps with true bipolar range and minimal external components. Use Value: Eliminates external level-shifting and reference circuitry, reducing channel cost by ~30% while maintaining <±0.01% full-scale accuracy over temperature. |
Use Scenario: High-precision benchtop DAQ for calibration labs requiring traceable 16-bit linearity and low THD. IC Role / Device Role / Timing Role: Standalone SAR ADC with internal reference and daisy-chain capability for scalable channel expansion. Use Value: 93dB SNR and –101dB THD ensure metrology-grade fidelity; daisy-chain mode enables simultaneous sampling across 8+ channels with single SCLK domain. |
| Medical Instrumentation | Automatic Test Equipment |
Use Scenario: Patient monitoring devices measuring ECG, EEG, and bioimpedance where low noise and DC accuracy are critical. IC Role / Device Role / Timing Role: Front-end ADC acquiring low-amplitude biopotential signals with ±5V input range and high CMR. Use Value: 0.5 LSBRMS input-referred noise and ±0.5 LSB INL support sub-µV resolution; internal reference avoids drift-induced baseline wander. |
Use Scenario: Functional test systems validating mixed-signal ICs using fast, accurate stimulus-response capture. IC Role / Device Role / Timing Role: High-speed digitizer capturing transient waveforms during device under test (DUT) response windows. Use Value: 250ksps throughput with no pipeline delay enables precise timing alignment; busy indicator simplifies FPGA-based trigger sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11167EUB+ | Same 16-bit/250ksps SAR architecture but 0–5V unipolar input range; identical package, pinout, and interface. | Requires external level-shifting for bipolar signals; lacks built-in overvoltage clamps on AIN+. | Select when measuring only positive-only sensor outputs (e.g., 4–20mA loop receivers) and board space permits external biasing. |
| ADS8860IDRCT | Texas Instruments 16-bit, 1MSPS SAR ADC with 0–5V input; requires external reference; higher speed but higher power (45mW). | No internal reference or bipolar input support; different SPI timing and no busy indicator; larger 10-pin VSSOP package (3.0×3.0mm). | Choose for higher throughput needs where external reference and level-shifting are already present; not drop-in compatible due to pin function differences. |
Compared with MAX11167EUB+, the MAX11169EUB+ adds true bipolar input and overvoltage protection at same speed; versus ADS8860IDRCT, it trades raw speed for integrated reference, lower power, and simplified analog front-end design - making it optimal for space- and cost-sensitive precision measurement systems.
Availability
MAX11169EUB+ is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and automatic test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for MAX11169EUB+ 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 high-performance analog and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX11169EUB+ belongs to Maxim's precision SAR ADC family targeting high-accuracy, low-power data acquisition where integration, size, and dc/ac performance are critical - especially in space-constrained, multichannel systems.
FAQ
What is the absolute maximum input voltage rating for the MAX11169EUB+ analog inputs?
The MAX11169EUB+ specifies an absolute maximum AIN+ to GND voltage of ±7V and AIN– to GND of –0.3V to +0.3V. Exceeding these limits risks permanent damage. For reliable operation within specification, keep AIN+ within ±5.1V and AIN– within ±0.1V, and use series resistors to limit fault current to ≤±20mA if overvoltage exposure is possible.
Does the MAX11169EUB+ require an external reference, or is the internal reference sufficient for precision applications?
The MAX11169EUB+ includes a fully integrated 4.096V reference with ±7ppm/°C temperature coefficient and internal buffer - sufficient for most precision applications without external components. Its typical INL of ±0.5 LSB and 93dB SNR confirm that the internal reference meets high-accuracy requirements when properly bypassed with a 10µF capacitor on the REF pin.
How does the MAX11169EUB+ support multichannel simultaneous sampling?
The MAX11169EUB+ supports multichannel simultaneous sampling via its daisy-chain interface mode: tie CNVST and SCLK together across all devices, route SDO of one to SDI of the next, and initiate conversion with a shared CNVST edge. All devices sample simultaneously, and results shift out sequentially - enabling true synchronized acquisition across multiple MAX11169EUB+ units without additional hardware.
What is the minimum acquisition time required for full 16-bit accuracy on the MAX11169EUB+?
The MAX11169EUB+ requires a minimum 1µs acquisition time (tACQ) to achieve full 16-bit accuracy. This is fixed by internal timing and cannot be reduced. To meet this, the source impedance driving AIN+ must be ≤1kΩ when connecting directly; with an external buffer, include a 5–50Ω series resistor and 4.7nF capacitor at AIN+ to control settling transients and preserve linearity.
Can the MAX11169EUB+ interface directly with a 2.5V microcontroller SPI port?
Yes - the MAX11169EUB+ supports OVDD from 2.3V to 5.25V, so it can operate with a 2.5V digital supply. Its digital inputs (CNVST, SCLK, SDI) accept VIH ≥ 0.7×OVDD and VIL ≤ 0.3×OVDD, and SDO drives VOH ≥ OVDD–0.4V and VOL ≤ 0.4V, making it fully compatible with standard 2.5V SPI logic without level shifters.
MAX11169EUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.3V ~ 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11169EUB+ FAQ
1.How can I place an order for MAX11169EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11169EUB+ 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 MAX11169EUB+ reliable?
The price and inventory of MAX11169EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11169EUB+ is usually 5 days.
3.What payment methods are accepted for MAX11169EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11169EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11169EUB+?
MAX11169EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11169EUB+ 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 MAX11169EUB+?
For technical support, including MAX11169EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11169EUB+ requirements.
6.How does Aetrix verify that MAX11169EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX11169EUB+ 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 MAX11169EUB+ meets industry standards.
7.What is the process for return or replacement of MAX11169EUB+?
All MAX11169EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11169EUB+, 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 MAX11169EUB+ part is unused and in its original packaging.
Return procedure for MAX11169EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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