My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1185ECM
- Part No.:
- MAX1185ECM
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TQFP Exposed Pad
- Datasheet:
-
MAX1185ECM.pdf
- Description:
- DUAL 10-BIT, 20 MSPS, ADC
- Quantity:
- Payment:
- Shipping:
Inventory:1,721
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1185ECM from Maxim Integrated is a dual 10-bit, 20Msps analog-to-digital converter optimized for low-power, high-dynamic-performance signal digitization in imaging and instrumentation systems. It features fully differential track-and-hold inputs, internal 2.048V precision bandgap reference, 59.5dB SNR at 7.5MHz input, and multiplexed parallel CMOS outputs operating from a single 3V supply.
For engineers reviewing the MAX1185ECM datasheet, MAX1185ECM pinout, MAX1185ECM application, or MAX1185ECM equivalent, this page delivers verified technical context, exact pin functions, confirmed dynamic performance metrics (SNR/SFDR), power modes (35mA normal / 2.8mA sleep / 1µA shutdown), and real-world interface constraints including separate OVDD (1.7–3.6V) and differential input bandwidth (400MHz).
Technical Context
The MAX1185ECM employs a nine-stage pipelined ADC architecture with 1.5-bit flash stages and digital error correction to ensure no missing codes and ±1.5 LSB INL. Each channel samples on the rising clock edge, with CHA data output on the 5th rising edge and CHB on the 5.5th falling edge - enabling precise interleaved timing for I/Q digitization.
Its fully differential T/H amplifiers support ±1Vp-p input range and deliver 400MHz (-3dB) full-power bandwidth. The internal reference structure supports three configurations: internal (REFOUT→REFIN), buffered external (REFIN-driven), or unbuffered external (REFIN = GND), with REFP/REFN/COM acting as low-impedance outputs or high-Z inputs depending on mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution & Speed | 10-bit dual-channel ADC, 20Msps sampling rate - enables simultaneous digitization of two analog signals with 50ns clock period. |
| Dynamic Performance | 59.5dB SNR and 74dB SFDR at fIN = 7.5MHz - meets requirements for ultrasound and IF sampling where spurious-free resolution is critical. |
| Power Consumption | 35mA analog supply current (105mW total) in normal operation; 2.8mA sleep and 1µA shutdown - supports battery-sensitive portable instrumentation. |
| Analog Input Bandwidth | 400MHz (-3dB) full-power bandwidth - allows accurate digitization of wideband RF/IF signals without external amplification. |
| Reference System | Internal 2.048V ±3% bandgap reference with 60ppm/°C TC - provides stable full-scale range without external components unless higher accuracy is required. |
| Digital Interface | Multiplexed 10-bit parallel CMOS outputs (D0A/B–D9A/B), A/B indicator, OE control, and user-selectable two's complement/offset binary format - simplifies FPGA or ASIC interface with minimal logic. |
| Supply Flexibility | Separate VDD (2.7–3.6V) and OVDD (1.7–3.6V) supplies - permits direct interfacing to 1.8V or 2.5V logic domains while maintaining analog performance. |
Pinout & Package
The MAX1185ECM is housed in a 48-pin TQFP package with exposed pad (7mm × 7mm), designed for thermal dissipation in high-density PCB layouts. Pin 1 is marked with a "+" sign for lead-free compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA+, INA-, INB+, INB- | Differential analog input pairs | Accept ±1Vp-p differential signals; matched impedance required for <0.25° phase matching between channels. |
| COM | Common-mode voltage node | Internally biased at VDD/2; must be bypassed to GND with ≥0.1µF capacitor for noise rejection and DC stability. |
| REFOUT, REFIN, REFP, REFN | Reference voltage terminals | Support internal (REFOUT→REFIN), buffered external, or unbuffered external reference configurations - determines full-scale range and noise floor. |
| CLK | Sampling clock input | CMOS-compatible; requires low-jitter source (<2ps RMS) since aperture jitter directly degrades SNR per SNR = 20·log(1/(2π·fIN·tAJ)). |
| A/B, D0A/B–D9A/B | Multiplexed digital output bus | A/B indicates active channel (1=CHA, 0=CHB); D0–D9 carry time-multiplexed 10-bit data - reduces pin count vs. nonmultiplexed alternatives. |
| OE, PD, SLEEP, T/B | Control inputs | OE enables/disables outputs; PD activates 1µA shutdown; SLEEP enters 2.8mA low-power state; T/B selects output coding format. |
| VDD, GND, OVDD, OGND | Power and ground rails | VDD/GND supply analog core (2.7–3.6V); OVDD/OGND drive digital outputs (1.7–3.6V) - independent supplies prevent digital noise coupling into analog path. |
Key Features
| Feature | Design Value |
|---|---|
| Channel-to-channel matching | 0.02dB gain and 0.25° phase matching - enables coherent I/Q demodulation without calibration in communication receivers. |
| Flexible reference architecture | Three selectable modes (internal/buffered/unbuffered) - allows trade-off between simplicity, accuracy, and external component count. |
| Low-latency pipeline | 5-cycle CHA and 5.5-cycle CHB latency - supports real-time feedback loops in closed-loop test equipment and medical imaging systems. |
| Thermally enhanced package | 48-pin TQFP with exposed pad - achieves lower junction-to-board thermal resistance for sustained 20Msps operation in industrial temperature range (-40°C to +85°C). |
| Output supply independence | OVDD range 1.7–3.6V - permits direct connection to 1.8V FPGA I/O banks without level shifters, reducing BOM and layout complexity. |
Applications
| High-Resolution Imaging | I/Q Channel Digitization |
|---|---|
Use Scenario: Digitizing CCD/CMOS sensor outputs in portable X-ray or endoscopic imaging systems requiring compact, low-power signal chain. IC Role / Device Role / Timing Role: Dual-channel ADC captures synchronized analog pixel streams; multiplexed outputs reduce FPGA pin count and routing congestion. Use Value: 59.5dB SNR preserves image contrast fidelity; 400MHz input bandwidth supports fast line-scan sensors without aliasing. |
Use Scenario: Downconverting RF signals in software-defined radios or LTE baseband receivers using quadrature demodulation. IC Role / Device Role / Timing Role: Simultaneously digitizes in-phase (I) and quadrature (Q) analog paths with matched gain/phase for vector accuracy. Use Value: 0.02dB/0.25° channel matching minimizes EVM degradation; 74dB SFDR suppresses adjacent-channel interference. |
| Multichannel IF Sampling | Ultrasound Beamforming |
Use Scenario: Capturing multiple intermediate-frequency signals in spectrum analyzers or radar front-ends with shared clock and reference. IC Role / Device Role / Timing Role: Dual ADC channels sample distinct IF bands under common CLK and REFIN, ensuring deterministic inter-channel timing. Use Value: Single 20Msps device replaces two discrete converters - cuts board area, power, and synchronization complexity. |
Use Scenario: Receiving echo signals from phased-array transducers in diagnostic ultrasound machines with tight size and thermal constraints. IC Role / Device Role / Timing Role: Digitizes paired receive channels per beamformer element; low 1µA shutdown mode conserves power between pulses. Use Value: 105mW total power enables dense channel counts; exposed-pad TQFP maintains thermal stability during burst-mode acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1184ECM | Same pinout and feature set, but rated for 20Msps only (MAX1185 is also 20Msps; MAX1184 datasheet confirms identical speed grade) | No functional difference in sampling rate or dynamic specs - both specified at 20Msps with same SNR/SFDR | Select MAX1184ECM if legacy design documentation references that part number; electrically identical to MAX1185ECM per Maxim's pin-compatible family note. |
| AD9236BCPZ-20 | Single-channel 12-bit, 20Msps ADC; no multiplexed outputs or A/B indicator; requires two devices for dual-channel use | Lacks integrated channel multiplexing and matching - increases PCB area, power, and clock distribution complexity | Choose only if 12-bit resolution is mandatory and board space/power budget allow dual-device implementation. |
Compared with MAX1185ECM, MAX1184ECM offers identical functionality and pin compatibility, while AD9236BCPZ-20 trades channel integration for higher resolution - making MAX1185ECM optimal for space-constrained dual-channel systems needing matched performance without duplication.
Availability
MAX1185ECM is available at Aetrix Electronics and suitable for high-resolution imaging, I/Q digitization, and multichannel IF sampling applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX1185ECM 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 demanding industrial, medical, and communications applications.
The MAX1185ECM belongs to Maxim's high-speed, low-power ADC product line, engineered specifically for applications requiring dual-channel synchronization, excellent dynamic performance at low supply voltage, and flexible reference configuration in compact form factors.
FAQ
What is the maximum clock frequency supported by the MAX1185ECM?
The MAX1185ECM supports a maximum clock frequency of 20MHz, corresponding to its 20Msps sampling rate. This is validated across the full industrial temperature range (-40°C to +85°C) and requires clean, low-jitter clock sources with rise/fall times under 2ns to maintain specified SNR and SFDR performance. Exceeding 20MHz violates absolute maximum ratings and may cause timing violations or data corruption in the MAX1185ECM pipeline stages.
Does the MAX1185ECM require external reference components for basic operation?
No, the MAX1185ECM operates fully autonomously with its internal 2.048V precision bandgap reference - simply connect REFOUT to REFIN via a 10kΩ resistor and bypass REFIN with >10nF to GND. External references are optional enhancements for applications needing tighter accuracy, different full-scale ranges, or lower temperature drift than the MAX1185ECM's native 60ppm/°C specification.
How does the A/B pin function in the MAX1185ECM data interface?
The A/B pin on the MAX1185ECM is a synchronous channel indicator that toggles with the clock: it is high when CHA data (sampled on the preceding rising clock edge) appears on D0A/B–D9A/B, and low when CHB data (sampled on the same rising edge but output half a cycle later) is present. Its typical 6ns delay relative to CLK ensures reliable setup/hold timing for FPGA capture logic interfacing with the MAX1185ECM.
Can the MAX1185ECM accept single-ended analog inputs?
Yes, the MAX1185ECM supports single-ended operation: connect the signal source to INA+ or INB+, tie INA- or INB- to COM, and maintain COM at VDD/2. However, differential mode is strongly recommended - it delivers superior SNR (59.5dB vs. ~56dB typical single-ended), rejects common-mode noise, and preserves the 0.02dB/0.25° channel matching critical for I/Q applications using the MAX1185ECM.
What thermal management considerations apply to the MAX1185ECM in continuous 20Msps operation?
The MAX1185ECM's 48-pin TQFP-EP package requires proper thermal design: the exposed pad must be soldered to a minimum 200mm² copper pour connected to internal/external GND planes. With 105mW power dissipation at +85°C ambient, thermal resistance θJA is ~45°C/W - so junction temperature stays within 150°C limit only if PCB layout provides adequate heat spreading. Failure to thermally anchor the EP compromises long-term reliability and dynamic performance of the MAX1185ECM.
MAX1185ECM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 48-TQFP Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 20M
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-TQFP-EP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1185ECM FAQ
1.How can I place an order for MAX1185ECM through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1185ECM 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 MAX1185ECM reliable?
The price and inventory of MAX1185ECM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1185ECM is usually 5 days.
3.What payment methods are accepted for MAX1185ECM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1185ECM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1185ECM?
MAX1185ECM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1185ECM 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 MAX1185ECM?
For technical support, including MAX1185ECM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1185ECM requirements.
6.How does Aetrix verify that MAX1185ECM is sourced from the original manufacturer or authorized distributors?
All MAX1185ECM 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 MAX1185ECM meets industry standards.
7.What is the process for return or replacement of MAX1185ECM?
All MAX1185ECM units undergo pre-shipment inspection (PSI). If there is an issue with MAX1185ECM, 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 MAX1185ECM part is unused and in its original packaging.
Return procedure for MAX1185ECM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1185ECM 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…
