MAX1177CCUP+ - 16-Bit 135ksps SAR ADC | 0-10V Input | Maxim Integrated
MPN: MAX1177CCUP+ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $17.5 | $17.50 |
| 10 | $15.4 | $154.00 |
| 100 | $13.1 | $1,310.00 |
| 500 | $11.95 | $5,975.00 |
| 1,000 | $10.85 | $10,850.00 |
| 3,000 | $9.5 | $28,500.00 |
MAX1177CCUP+ Overview
An SAR ADC is a type of data-acquisition converter that uses a binary-search successive-approximation algorithm to digitize an analog input. SAR ADCs occupy the middle ground between flash converters (very fast, low resolution) and sigma-delta ADCs (very high resolution, slower). They are widely used in industrial control, instrumentation, and data-acquisition systems where moderate speed (tens to hundreds of ksps) and true 16-bit resolution with low-latency deterministic conversion are required. The MAX1177 family belongs to the precision data-converter hierarchy that sits between slow integrating ADCs and high-speed pipeline ADCs.
Key features include a bipolar ±5V or unipolar 0V-to-10V analog input range (the bipolar -5V to +5V mode is selected by pin configuration on the MAX1177/MAX1178/MAX1188 family), automatic power-down between conversions for reduced average supply current, a factory-trimmed internal conversion clock eliminating the need for an external crystal, and byte-wide parallel output that interfaces directly to microcontrollers and DSPs without external glue logic. The 20-pin TSSOP footprint provides a small board area suitable for space-constrained designs.
Typical applications include industrial process control loops, weigh-scale signal chains, multi-channel data-acquisition front ends, panel meters and digital multimeters, motor control current/voltage sensing, and battery test equipment where the ADC directly digitizes ±10V transducer outputs. The internal input protection and the +4.2V analog input range make it well suited for industrial sensor interfacing.
When designing with this part, place 0.1µF decoupling capacitors close to AVDD and DVDD, route digital outputs away from the analog input trace, and avoid switching large currents near the analog front-end. The MAX1177 differs from the MAX1178 and MAX1188 primarily in analog input range, so verify your signal-conditioning range matches the chosen variant.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet or on DigiKey/Mouser product pages.
Drop-in alternatives for MAX1177CCUP+ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX1177CCUP+ (same form factor and footprint) — differing in Resolution, Operating Temperature, Sample Rate, Digital Interface, Analog Input Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1177CCUP+T
✅ Drop-In✓ In Stock
$7.4 / Unit
View Datasheet →MAX1178CEUP+T
✅ Drop-In✓ In Stock
$8.95 / Unit
View Datasheet →MAX1188CEUP+T
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MAX1147BEUP+T
✅ Drop-In✓ In Stock
$8.7 / Unit
View Datasheet →MAX1156AEUP+T
✅ Drop-In✓ In Stock
$7.8 / Unit
View Datasheet →MAX1177CCUP+ Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 |
| Sample Rate | 135 kSPS (kilosamples per second) |
| Analog Input Range | 0 V to 10 V (unipolar); bipolar input variants in MAX1178/MAX1188 |
| Internal Clock | Factory-trimmed (no external crystal required) |
| Digital Interface | Byte-wide parallel |
| Operating Temperature Range | 0 °C to +70 °C (commercial grade, CCUP suffix) |
| Package | 20-pin TSSOP (MO-153AC) |
| Package Size | 4.40 mm body width (TSSOP-20) |
| Mounting Type | Surface Mount (Gull Wing) |
| Related Family Members | MAX1178 (bipolar input variant), MAX1188 (extended speed variant) |
MAX1177CCUP+ Pin Configuration
| Pin 1 | AGND — Analog ground return for input and reference |
| Pin 2 | AVDD — Analog supply voltage (typ. +5 V); decouple with 0.1 µF + 10 µF to AGND |
| Pin 3 | AIN — Analog input (0 V to +10 V unipolar on MAX1177) |
| Pin 4 | REF — Reference voltage input (typically +4.2 V) |
| Pin 5 | REFGND — Reference ground |
| Pin 6 | AGND — Analog ground (additional ground pin) |
| Pin 7 | CNVST — Conversion start input (active low edge-triggered) |
| Pin 8 | RD — Read input (active low; enables parallel output) |
| Pin 9 | CS — Chip select (active low) |
| Pin 10 | BUSY — Busy output (high while conversion is in progress) |
| Pin 11 | DGND — Digital ground |
| Pin 12 | DVDD — Digital supply voltage (typ. +3.3 V or +5 V); decouple with 0.1 µF to DGND |
| Pin 13 | D15 — Parallel data output bit 15 (MSB) |
| Pin 14 | D14 — Parallel data output bit 14 |
| Pin 15 | D13 — Parallel data output bit 13 |
| Pin 16 | D12 — Parallel data output bit 12 |
| Pin 17 | D11 — Parallel data output bit 11 |
| Pin 18 | D10 — Parallel data output bit 10 |
| Pin 19 | D9 — Parallel data output bit 9 |
| Pin 20 | D8 — Parallel data output bit 8 (high byte LSB) |
Typical Applications
MAX1177CCUP+ is suitable for 7 applications: Industrial Process Control Signal Acquisition, Digital Panel Meter and Multimeter Signal Chain, Weigh Scale and Load Cell Digitization, Battery Test and Power-Supply Monitoring, Motor Control Current and Voltage Sensing, Data Acquisition Card Front End, Industrial Sensor Signal Conditioning Output.
Industrial Process Control Signal Acquisition
The MAX1177CCUP+ is well suited for industrial process-control front ends digitizing 4-20 mA / 0-10 V transducer outputs. Its 0 V to 10 V unipolar analog input range directly accepts 0-10 V industrial sensor signals without external scaling amplifiers. The 135 ksps sample rate comfortably covers multi-channel PLC and DCS scan rates, and the 16-bit resolution preserves process setpoint accuracy across the full input range. Automatic power-down between conversions reduces average supply current in sparsely sampled loops, and the byte-wide parallel interface simplifies connection to industrial MCUs. Designers should place 0.1 µF decoupling on AVDD/DVDD and route digital outputs away from the analog input trace.
Recommended
Digital Panel Meter and Multimeter Signal Chain
The MAX1177CCUP+ fits digital panel meters and bench multimeters that need to digitize a wide unipolar input range at true 16-bit resolution. The 0 V to 10 V analog input range covers the typical 0-10 V and 0-5 V measurement ranges common in DPM designs, eliminating the need for external attenuation. The 135 ksps throughput enables fast auto-ranging and fast-update-rate displays. The factory-trimmed internal clock removes the BOM cost of a crystal while keeping conversion timing deterministic. The TSSOP-20 package keeps the front-end compact for handheld form factors.
Recommended
Weigh Scale and Load Cell Digitization
Weigh scales and load-cell instrumentation benefit from the MAX1177CCUP+'s 16-bit resolution and low-noise analog front-end. When paired with a load-cell bridge amplifier that drives 0-10 V unipolar signals, the ADC preserves the milligram-level resolution needed for high-precision balances. The 135 ksps throughput enables fast settling for in-motion weighing applications. Automatic power-down keeps average supply current low for battery-powered portable scales, extending operating life. The TSSOP-20 footprint simplifies compact PCB designs used in retail and laboratory environments.
Recommended
Battery Test and Power-Supply Monitoring
Battery formation, capacity test, and DC power-supply monitoring systems use the MAX1177CCUP+ to digitize cell voltages and power-rail telemetry. The 0 V to 10 V input range covers single-cell-to-multi-cell stack voltages through simple resistive dividers, and 16-bit resolution captures millivolt-level cell drift. The 135 ksps throughput records fast transient events during charge/discharge cycles. Automatic power-down between samples is valuable in long-duration cyclers where average current matters. The TSSOP-20 package supports compact cell-monitoring PCBs.
Recommended
Motor Control Current and Voltage Sensing
Motor control boards use the MAX1177CCUP+ to digitize DC bus voltage, phase current, and feedback signals in industrial drives. The 0 V to 10 V input range accepts current-sense-amplifier outputs directly, and the 135 ksps throughput is sufficient for control-loop update rates below 10 kHz. The byte-wide parallel interface minimizes sample-to-output delay for fast current-loop response. Automatic power-down between conversions reduces driver-board standby current, and the TSSOP-20 footprint suits compact integrated power modules.
Recommended
Data Acquisition Card Front End
PCI/PCIe and USB data-acquisition cards use the MAX1177CCUP+ as a single-channel front end for general-purpose digitizing of analog signals. The 0 V to 10 V input range, true 16-bit resolution, and 135 ksps throughput match the typical specifications of mid-range DAQ products. The byte-wide parallel interface connects to on-board FPGAs or microcontrollers without external logic, and the TSSOP-20 package keeps the analog front end compact on dense DAQ PCBs. Automatic power-down simplifies sleep-mode DAQ design.
Recommended
Industrial Sensor Signal Conditioning Output
Industrial sensor signal-conditioning modules often re-digitize an analog 0-10 V output for digital transmission over fieldbus networks. The MAX1177CCUP+ performs that digitization at true 16-bit resolution and 135 ksps, supporting HART, Foundation Fieldbus, and Profibus analog I/O modules. The TSSOP-20 footprint enables dense multi-channel I/O cards, and automatic power-down reduces loop-power consumption. The factory-trimmed internal clock keeps long-duration field installations free of crystal drift and aging.
Recommended
Recommended Products Summary
Engineering reference data for MAX1177CCUP+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX1177CCUP+T | MAX1178CEUP+T | MAX1188CEUP+T | MAX1147BEUP+T | MAX1156AEUP+T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) |
| Package | TSSOP-20 (MO-153AC, 4.40 mm) | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 12/14 bit family option | 12 bit |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR (simultaneous sampling) |
| Sample Rate | 135 kSPS | 135 kSPS | 135 kSPS | Higher speed variant | 200+ kSPS | 300 kSPS simultaneous |
| Analog Input Range | 0 V to +10 V unipolar | 0 V to +10 V unipolar | Bipolar ±5 V | Bipolar ±10 V variant | 0 V to +5 V or ±5 V | ±5 V |
| Digital Interface | Byte-wide parallel | Byte-wide parallel | Byte-wide parallel | Byte-wide parallel | Byte-wide parallel | Byte-wide parallel |
| Internal Clock | Yes, factory-trimmed | Yes, factory-trimmed | Yes, factory-trimmed | Yes, factory-trimmed | Yes | Yes |
| Power-Down Mode | Yes, automatic between conversions | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | 0 °C to +70 °C (commercial) | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C |
| Lifecycle Status | Active | Active | Active | Active | Active | Active |
Key Differentiators
- True 0 V to +10 V unipolar analog input range without external scaling (vs MAX1147BEUP+T)
- Factory-trimmed internal clock eliminates external crystal (vs Generic SAR ADCs requiring external clock)
- Byte-wide parallel interface minimizes sample-to-output latency (vs Serial-interface SAR ADCs)
- Same TSSOP-20 pin across the MAX1177/MAX1178/MAX1188 family enables design reuse (vs MAX1188CEUP-T (higher speed variant))
Design Notes
Power the MAX1177CCUP+ from a clean +5 V analog supply for AVDD and a digital supply for DVDD (3.3 V or 5 V depending on MCU logic level). Place a 10 µF bulk capacitor in parallel with a 0.1 µF ceramic decoupling capacitor directly at each supply pin, routed with short, low-impedance traces to the corresponding ground. The ADC's automatic power-down between conversions reduces average supply current in sparsely sampled applications, but the analog front-end still draws continuous quiescent current whenever AVDD is present, so plan thermal dissipation accordingly.
Use a star-ground or split analog/digital ground topology, joining the analog and digital grounds only at a single point near the AGND/DGND pins of the ADC. Route the analog input trace as a guarded, low-impedance path with no digital traces parallel-running for long distances. Place the reference bypass capacitor directly at the REF pin with the shortest possible trace to REFGNCN. The TSSOP-20 power pad and the small lead pitch require careful PCB layout; follow the JEDEC MO-153 land pattern recommendations to keep impedance matched and avoid manufacturing defects.
Do not exceed the +10 V absolute maximum analog input on AIN or apply negative voltages without external clamping on the MAX1177 unipolar variant. The bipolar input range requires the MAX1178 family. Ensure CNVST, CS, and RD timing follows the datasheet timing table; violating setup/hold windows causes corrupted conversions. Verify REF decoupling is adequate - reference noise couples directly into conversion noise. The MAX1177CCUP+ is commercial grade (0 °C to +70 °C); use the 'E' suffix industrial variants for -40 °C to +85 °C operation.
Maintain short analog input traces and use a low-impedance, low-noise input buffer for source impedances above ~5 kΩ. The SAR ADC's input presents a switched-capacitor load during acquisition, so source impedance should be low enough to settle within the acquisition window (consult the datasheet timing diagram for tACQ). Add an RC anti-aliasing filter at AIN to limit out-of-band noise; choose RC such that the -3 dB corner is below half the sample rate. The byte-wide parallel outputs transition simultaneously and inject ground bounce, so add small series resistors (22-33 Ω) close to the digital outputs if the host bus is long.
Compliance Information
RoHS / REACH / halogen-free status not explicitly stated in the verified web data; consult the manufacturer datasheet for the latest compliance documentation. Lead-free is standard for Maxim Integrated post-2004 production. The CCUP commercial temperature grade is not AEC-Q100 qualified; choose the 'E' industrial-grade variant for AEC-Q100-style automotive qualification.
