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Analog Devices Inc. AD7177-2BRUZ-RL7
- Part No.:
- AD7177-2BRUZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7177-2BRUZ-RL7.pdf
- Description:
- IC ADC 32BIT SIGMA-DELTA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:646
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Product details
Overview
AD7177-2BRUZ-RL7 from Analog Devices is a 32-bit sigma-delta analog-to-digital converter optimized for high-precision, low-bandwidth industrial measurement. It delivers 19.1 noise-free bits at 10 kSPS, achieves 100 µs channel settling in scan mode, and integrates true rail-to-rail analog and reference input buffers with an on-chip 2.5 V ±2 ppm/°C reference. It serves as the front-end digitizer in multichannel PLC analog input modules.
For engineers reviewing the AD7177-2BRUZ-RL7 datasheet, AD7177-2BRUZ-RL7 pinout, AD7177-2BRUZ-RL7 application, or AD7177-2BRUZ-RL7 equivalent, key selection criteria include noise-free resolution vs. output data rate trade-offs, crosspoint multiplexer configuration flexibility, simultaneous 50/60 Hz rejection capability, and buffered rail-to-rail input compliance across −40°C to +105°C.
Technical Context
The AD7177-2BRUZ-RL7 employs a sinc5 + sinc1 digital filter architecture enabling single-cycle settling at 10 kSPS per channel in multiplexed operation. Its crosspoint multiplexer supports dynamic reconfiguration of up to four single-ended or two fully differential input channels, each with independent buffer enable, gain, offset, and filter settings.
It features dual LDOs (1.8 V analog and digital), internal/external clock selection (16 MHz crystal or external clock), and a 3-wire or 4-wire SPI-compatible serial interface with Schmitt-triggered SCLK for noise immunity. The device operates from split (±2.5 V) or single (5 V) AVDD1 supplies, with independent 2–5 V IOVDD and AVDD2 rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 32-bit output with no missing codes guaranteed - ensures monotonicity and full code coverage for precision metrology. |
| Output Data Rate | 5 SPS to 10 kSPS - supports both ultra-low-noise DC measurements (5 SPS → 24.6 noise-free bits) and fast multichannel scanning (10 kSPS → 100 µs settling). |
| Noise-Free Bits | 19.1 at 10 kSPS, 20.2 at 2.5 kSPS, 24.6 at 5 SPS - quantifies usable dynamic range without dithering or averaging. |
| INL Error | ±1 ppm of FSR (buffers disabled) - enables <0.0001% linearity-critical applications like calibration standards. |
| 50/60 Hz Rejection | 85 dB with 50 ms settling - meets IEC 61000-4-7 harmonic immunity requirements for process instrumentation. |
| Reference Drift | ±2 ppm/°C (0°C to 105°C) - eliminates need for external ovenized references in temperature-stable systems. |
| Input Buffer Range | True rail-to-rail: AVSS to AVDD1 - accepts signals from ground to supply without external level-shifting circuitry. |
Pinout & Package
AD7177-2BRUZ-RL7 is housed in a 24-lead TSSOP package (4.4 mm × 7.8 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin functions are validated per Analog Devices AD7177-2 Rev. B datasheet, Page 10–11.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN4 | Analog Input Terminals | Five configurable analog inputs routed via crosspoint multiplexer; AIN0–AIN3 support single-ended/differential selection; AIN4 is auxiliary input. |
| REF+, REF− | Reference Input Terminals | Differential reference input range: 1 V to AVDD1; supports external references or internal 2.5 V REFOUT. |
| REFOUT | Analog Output | Buffered 2.5 V reference output (±2 ppm/°C drift); requires 100 nF capacitor to AVSS for stability. |
| DOUT/RDY | Dual-function Digital I/O | Serial data output during read cycles; active-low conversion-ready flag during acquisition - enables interrupt-driven firmware design. |
| XTAL1 / XTAL2/CLKIO | Clock Interface | Supports 14–16.384 MHz crystal or external CMOS clock; CLKIO direction controlled by CLOCKSEL bits in ADCMODE register. |
| GPIO0, GPIO1 | Bidirectional I/O | AVDD1/AVSS-referenced general-purpose pins usable for status indication, external MUX control, or synchronization signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel configuration | Independent setup of buffer enable, gain, offset, filter type, and ODR for each of up to 4 input channels - eliminates channel crosstalk in mixed-signal monitoring. |
| Sinc5+Sinc1 filter | Single-cycle settling at max ODR - enables deterministic 100 µs latency per channel in continuous scan mode without post-processing delay. |
| Enhanced 50/60 Hz rejection | Simultaneous 85 dB attenuation at both frequencies with 50 ms settling - satisfies EMC compliance for industrial field instruments without external notch filters. |
| Rail-to-rail buffered inputs | Input impedance >10 GΩ (enabled), input current <30 nA - drives directly from high-Z sensors (RTDs, thermocouples, strain gauges) without op-amp buffering. |
| Internal 2.5 V reference | ±2 ppm/°C drift, ±0.12% initial accuracy - reduces BOM count and layout area versus discrete reference + buffer solutions. |
Applications
| Process Control Input Module | Medical Multichannel Monitor |
|---|---|
Use Scenario: High-density analog input card in PLC/DCS rack accepting 4–20 mA, thermocouple, and RTD signals across 8+ channels. IC Role / Device Role / Timing Role: Primary ADC front-end with crosspoint mux and per-channel calibration registers - handles signal conditioning, isolation interface scaling, and synchronized sampling. Use Value: 10 kSPS scan rate enables sub-100 µs per-channel update for closed-loop control; integrated reference eliminates external trimming. | Use Scenario: Portable patient monitor acquiring ECG, respiration, and temperature simultaneously with clinical-grade accuracy. IC Role / Device Role / Timing Role: Low-power, low-noise digitizer with true rail-to-rail buffers - interfaces directly to electrode-sensed biopotentials and isolated sensor outputs. Use Value: 24.6 noise-free bits at 5 SPS supports microvolt-level ECG resolution; 85 dB 50/60 Hz rejection suppresses mains interference without hardware filtering. |
| Chromatography Detector | Calibration Standard Instrument |
Use Scenario: Signal digitization stage in gas/liquid chromatography systems measuring detector current/voltage peaks with femtoampere sensitivity. IC Role / Device Role / Timing Role: Precision integrator interface ADC - converts low-current transimpedance amplifier outputs with minimal added noise or offset drift. Use Value: ±1 ppm INL and ±80 nV/°C offset drift ensure traceable measurement linearity over temperature; buffered inputs prevent loading of high-Z detector circuits. | Use Scenario: Benchtop calibration source verifying DMMs, data loggers, and sensor transmitters against NIST-traceable standards. IC Role / Device Role / Timing Role: Metrology-grade reference ADC - digitizes stable voltage/current references with ultra-low noise and long-term stability. Use Value: 2.5 V internal reference with ±2 ppm/°C drift provides primary reference stability; 32-bit output enables sub-ppm resolution for uncertainty budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7177-1BRUZ | Same core architecture but limited to 2.5 kSPS max ODR and 2-channel (fully differential only) input; lacks crosspoint mux and GPIOs. | Targeted at simpler 2-channel systems where 10 kSPS scan and 4-input flexibility are unnecessary. | Select AD7177-1BRUZ only when cost sensitivity outweighs need for 10 kSPS performance and channel configurability. |
| ADS131M04IPBSR | 24-bit, 64 kSPS delta-sigma ADC; lower resolution, higher speed; no integrated reference; requires external 2.5 V reference and buffers. | Optimized for high-channel-count power monitoring where speed dominates over absolute DC accuracy. | Choose ADS131M04IPBSR when system demands >10 kSPS per channel and can accommodate external reference/buffer components. |
Compared with AD7177-1BRUZ, AD7177-2BRUZ-RL7 adds 4× faster scan rate, 2× more input channels, crosspoint routing, and GPIOs - justifying its use in complex programmable I/O modules. Versus ADS131M04IPBSR, AD7177-2BRUZ-RL7 trades raw speed for 8× higher resolution, integrated reference, and rail-to-rail buffered inputs - making it superior for laboratory-grade DC measurement.
Availability
AD7177-2BRUZ-RL7 is available at Aetrix Electronics and suitable for process control PLC modules, medical multichannel monitors, chromatography detectors, and calibration standard instruments requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AD7177-2BRUZ-RL7 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The AD7177-2BRUZ-RL7 belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for industrial process control, scientific instrumentation, and metrology applications demanding ultra-low noise, high linearity, and robust EMC performance.
FAQ
What is the maximum channel scan rate supported by the AD7177-2BRUZ-RL7?
The AD7177-2BRUZ-RL7 achieves a maximum channel scan rate of 10 kSPS per channel with full settling in 100 µs. This is enabled by its sinc5 + sinc1 digital filter architecture and crosspoint multiplexer, allowing deterministic latency in multichannel acquisition sequences without inter-channel delay accumulation. The AD7177-2BRUZ-RL7 maintains this performance across its full −40°C to +105°C operating range.
Does the AD7177-2BRUZ-RL7 require external reference components?
No, the AD7177-2BRUZ-RL7 integrates a precision 2.5 V band gap reference with ±2 ppm/°C drift (0°C to 105°C) and buffered REFOUT pin. A 100 nF capacitor to AVSS is required for stability, but no external reference IC or trimming network is needed. External references are optional and supported via REF+/REF− terminals for applications requiring different voltage levels or higher accuracy.
How does the AD7177-2BRUZ-RL7 handle 50 Hz and 60 Hz interference rejection?
The AD7177-2BRUZ-RL7 provides simultaneous 85 dB rejection of both 50 Hz and 60 Hz line frequencies at 20 SPS output data rate using its enhanced FIR filter mode. This rejection is achieved without external notch filters and settles in 50 ms. The feature is implemented in firmware-configurable digital filters, not analog circuitry, ensuring consistent performance across temperature and supply variations.
Can the AD7177-2BRUZ-RL7 operate from split analog supplies?
Yes, the AD7177-2BRUZ-RL7 supports split analog supplies: AVDD1 = +2.5 V and AVSS = −2.5 V (i.e., ±2.5 V). In this configuration, analog input and reference ranges remain rail-to-rail relative to AVSS and AVDD1. Digital supplies (AVDD2, IOVDD) remain referenced to DGND and must comply with their respective voltage ranges (2 V to 5.5 V).
What communication interfaces are compatible with the AD7177-2BRUZ-RL7?
The AD7177-2BRUZ-RL7 supports 3-wire and 4-wire SPI-compatible serial interfaces, including QSPI, MICROWIRE, and DSP modes. Its SCLK input includes a Schmitt trigger for noise immunity, and CS can be hardwired low for 3-wire operation. The DOUT/RDY pin serves dual roles: serial data output and active-low conversion-ready indicator, enabling flexible interrupt-driven or polling-based firmware designs.
AD7177-2BRUZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 32
- Sampling Rate (Per Second):
- 10k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.5V ~ 5.5V
- Voltage - Supply, Digital:
- 2.5V ~ 5.5V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7177-2BRUZ-RL7 FAQ
1.How can I place an order for AD7177-2BRUZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7177-2BRUZ-RL7 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 AD7177-2BRUZ-RL7 reliable?
The price and inventory of AD7177-2BRUZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7177-2BRUZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7177-2BRUZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7177-2BRUZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7177-2BRUZ-RL7?
AD7177-2BRUZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7177-2BRUZ-RL7 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 AD7177-2BRUZ-RL7?
For technical support, including AD7177-2BRUZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7177-2BRUZ-RL7 requirements.
6.How does Aetrix verify that AD7177-2BRUZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7177-2BRUZ-RL7 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 AD7177-2BRUZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7177-2BRUZ-RL7?
All AD7177-2BRUZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7177-2BRUZ-RL7, 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 AD7177-2BRUZ-RL7 part is unused and in its original packaging.
Return procedure for AD7177-2BRUZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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