My Inquiry
My Account
Analog Devices Inc. AD7734BRUZ
- Part No.:
- AD7734BRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7734BRUZ.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:327
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7734BRUZ from Analog Devices is a 24-bit sigma-delta analog-to-digital converter with four single-ended input channels, ±10 V input range, 21-bit effective resolution at 500 Hz, on-chip per-channel system calibration, and 3-wire SPI-compatible serial interface. It operates from a single 5 V analog supply and supports industrial process control signal acquisition where high precision and fast channel switching are required.
For engineers reviewing the AD7734BRUZ datasheet, AD7734BRUZ pinout, AD7734BRUZ application, or AD7734BRUZ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts for multiplexed industrial measurement systems.
Technical Context
The AD7734BRUZ integrates a 24-bit sigma-delta modulator with digital filtering, programmable conversion timing (372–12.19 kHz), and independent channel setup registers. Its analog front end includes internal bias networks (BIAS0–BIAS3, BIASHI/BIASLO) enabling true bipolar ±10 V operation without external level-shifting circuitry.
Chopping can be enabled to reduce offset drift to ±2.5 µV/°C or disabled to achieve 15.4 kHz maximum output rate with 17.2-bit effective resolution at ±10 V input range. Channel-to-channel isolation exceeds 110 dB at DC, and overvoltage tolerance up to ±16.5 V on any AIN does not degrade adjacent channel accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no missing codes; 21-bit effective (p-p 18.1 bits) at 500 Hz with chopping enabled - ensures full dynamic range utilization in high-precision PLC analog input modules |
| Input Range | Configurable ±10 V, ±5 V, 0–+10 V, or 0–+5 V - supports direct connection to industrial sensors without external gain/attenuation |
| Conversion Rate | 372 Hz to 12.19 kHz (chopping enabled); up to 15.4 kHz (chopping disabled) - enables flexible trade-off between noise performance and scan speed in DCS systems |
| INL Error | ±0.0025% FSR (typical, 6.144 MHz MCLK) - corresponds to <±6 LSB at 24-bit scale, critical for metrology-grade calibration traceability |
| Channel Isolation | 110 dB at DC - prevents crosstalk-induced errors when measuring mixed-signal industrial inputs (e.g., thermocouple + 4–20 mA) |
| Supply Voltage | AVDD = 5 V ±5%; DVDD = 2.7–3.6 V or 4.75–5.25 V - allows dual-voltage microcontroller interfacing while maintaining analog integrity |
| Operating Temp | –40°C to +105°C - qualified for embedded use in harsh industrial enclosures without derating |
Pinout & Package
Package: 28-lead TSSOP (4.4 mm × 9.7 mm, 0.65 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN3 | Analog Input Channels | Single-ended inputs accepting ±10 V directly; each isolated to >110 dB - enables 4-channel simultaneous monitoring without external multiplexer |
| BIAS0–BIAS3, BIASHI, BIASLO | Internal Bias Reference Network | Provides 2.5 V common-mode voltage for true bipolar operation; eliminates need for external op-amp biasing circuitry |
| SCLK, DIN, DOUT, CS | 3-Wire Serial Interface | SPI/QSPI/MICROWIRE/DSP compatible; Schmitt-triggered inputs tolerate noisy industrial bus environments |
| MCLKIN / MCLKOUT | Master Clock Interface | Accepts crystal (6.144 MHz typical) or CMOS clock; MCLKOUT can be disabled to reduce EMI in dense PCB layouts |
| SYNC/P1, P0 | Programmable I/O Port | Configurable as digital input/output or synchronization trigger - supports hardware handshaking with PLC backplane logic |
| RDY | Conversion Ready Indicator | Active-low open-drain output signals valid data availability - simplifies interrupt-driven firmware architecture |
| REFIN(+), REFIN(–) | Differential Reference Inputs | Support external 2.5 V reference or internal "No-Reference" detect; enables fail-safe operation if reference fails |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel system calibration | Enables independent zero-scale and full-scale correction for each AIN - compensates for sensor-specific offset/gain drift in multi-sensor arrays |
| Overvoltage tolerance | Withstands ±16.5 V on any AIN without affecting adjacent channels - protects against field wiring faults in industrial cabinets |
| Chopping control | Software-selectable chopping mode reduces offset drift to ±2.5 µV/°C - maintains accuracy across wide ambient temperature swings |
| Extended input voltage range | Functional up to ±50 V absolute max (non-destructive) - provides margin against transient surges in factory floor environments |
| On-chip reference detect | Automatically flags missing or degraded reference via NOREF bit - enables diagnostic logging in safety-critical process controllers |
Applications
| PLC Analog Input Module | Industrial Weigh Scale Controller |
|---|---|
Use Scenario: 4-channel voltage acquisition in modular PLC backplanes handling mixed sensor types (RTD, strain gauge, 0–10 V transmitters). IC Role / Device Role / Timing Role: Primary ADC front end performing synchronized sampling, on-the-fly calibration, and SPI-based data streaming to host controller. Use Value: Eliminates external signal conditioning for ±10 V inputs and enables <500 µs per-channel conversion - increases scan rate by 3× vs. legacy 16-bit solutions. |
Use Scenario: High-stability weight measurement in food processing scales requiring 1:1,000,000 resolution under thermal cycling. IC Role / Device Role / Timing Role: Precision load cell digitizer with per-channel system calibration and chopping-enabled low-drift operation. Use Value: Achieves <±0.0025% INL and ±2.5 µV/°C offset drift - meets OIML R76 Class III requirements without oven-controlled references. |
| Process Transmitter Interface | Energy Meter Data Acquisition |
Use Scenario: Digitizing 4–20 mA loop outputs and auxiliary voltage inputs (e.g., pressure, flow) in smart field transmitters. IC Role / Device Role / Timing Role: Dual-role ADC supporting both current-loop sensing (via shunt) and direct voltage inputs with shared calibration. Use Value: Single-chip solution replaces discrete op-amp + ADC combos - reduces BOM count by 40% and improves long-term stability via integrated calibration. |
Use Scenario: Multi-phase energy meter requiring simultaneous voltage/current sampling with harmonic analysis capability. IC Role / Device Role / Timing Role: High-resolution front-end ADC capturing fundamental and harmonic content up to 15 kHz output rate. Use Value: 14-bit p-p resolution at 15 kHz (chopping disabled) enables accurate 50th harmonic capture - satisfies IEC 62053-22 Class 0.2 accuracy class. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, multi-channel sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7738BRUZ | 8 single-ended or 4 differential inputs; supports 0.625–2.5 V input ranges; external mux output pin; higher channel count but narrower voltage range | Better suited for low-voltage sensor arrays (e.g., MEMS accelerometers); requires external gain for ±10 V signals | Select AD7738BRUZ when expanding beyond 4 channels or integrating programmable gain before ADC |
| ADS1258IPWR | 8-channel, 24-bit delta-sigma ADC; 10 kSPS max; integrated PGA (1–128×); different serial interface (2-wire I²C + optional SPI) | Designed for compact, low-power portable instrumentation; lacks ±16.5 V overvoltage tolerance and per-channel calibration registers | Choose ADS1258IPWR for battery-powered handheld testers where PGA flexibility outweighs industrial ruggedness |
Compared with AD7734BRUZ, AD7738BRUZ offers more channels but requires external signal conditioning for ±10 V inputs, while ADS1258IPWR provides integrated gain but sacrifices overvoltage robustness and per-channel calibration - making AD7734BRUZ optimal for fixed 4-channel industrial voltage acquisition with field fault resilience.
Availability
AD7734BRUZ is available at Aetrix Electronics and suitable for PLC analog input modules, industrial weigh scale controllers, process transmitter interfaces, energy meter data acquisition, and high-accuracy test equipment requiring stable component supply across extended temperature and long product lifecycles.
Supply support for AD7734BRUZ 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 Norwood, MA, serving industrial, automotive, communications, and healthcare markets.
The AD7734BRUZ belongs to Analog Devices' high-precision sigma-delta ADC family designed specifically for industrial process control and automated test equipment where resolution, channel density, and robustness in harsh environments are critical.
FAQ
What is the maximum sample rate of the AD7734BRUZ with chopping enabled?
The AD7734BRUZ achieves a maximum output data rate of 12.19 kHz with chopping enabled, corresponding to a minimum conversion time of 82 µs (filter word = 2, register value 0x82). This configuration retains 17.3-bit effective resolution at ±10 V input range while delivering ±2.5 µV/°C offset drift performance - ideal for applications needing both speed and thermal stability.
Does the AD7734BRUZ support true bipolar ±10 V inputs without external components?
Yes, the AD7734BRUZ supports true bipolar ±10 V inputs natively using its internal BIAS0–BIAS3 and BIASHI/BIASLO network, which establishes a 2.5 V common-mode voltage. No external op-amps, level shifters, or resistor networks are required - simplifying layout and improving long-term accuracy in industrial analog input designs using AD7734BRUZ.
How does the AD7734BRUZ handle overvoltage conditions on analog inputs?
The AD7734BRUZ tolerates up to ±16.5 V on any AIN pin without degrading performance of adjacent channels, and withstands ±50 V absolute maximum without damage. This overvoltage resilience is achieved through internal protection circuitry and high channel-to-channel isolation (>110 dB), making AD7734BRUZ suitable for deployment in electrically noisy factory environments where wiring faults may occur.
Can the AD7734BRUZ perform calibration independently per channel?
Yes, the AD7734BRUZ implements per-channel system calibration via dedicated Channel Zero-Scale Calibration Registers and Channel Full-Scale Calibration Registers. Each of the four input channels (AIN0–AIN3) can be calibrated individually for offset and gain errors - essential for multi-sensor systems where individual transducer characteristics vary, ensuring consistent accuracy across all channels in AD7734BRUZ-based designs.
What serial interface protocols is the AD7734BRUZ compatible with?
The AD7734BRUZ features a 3-wire serial interface compatible with SPI, QSPI™, MICROWIRE, and DSP protocols. All logic inputs (SCLK, DIN, CS, RESET, SYNC/P1, P0) include Schmitt triggers for noise immunity, and the interface operates with either 3 V or 5 V digital supplies - enabling seamless integration with diverse microcontrollers and digital signal processors in AD7734BRUZ-based industrial systems.
AD7734BRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 15.4k
- Number of Inputs:
- 4
- Input Type:
- 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
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- True Bipolar
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7734BRUZ FAQ
1.How can I place an order for AD7734BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7734BRUZ 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 AD7734BRUZ reliable?
The price and inventory of AD7734BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7734BRUZ is usually 5 days.
3.What payment methods are accepted for AD7734BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7734BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7734BRUZ?
AD7734BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7734BRUZ 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 AD7734BRUZ?
For technical support, including AD7734BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7734BRUZ requirements.
6.How does Aetrix verify that AD7734BRUZ is sourced from the original manufacturer or authorized distributors?
All AD7734BRUZ 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 AD7734BRUZ meets industry standards.
7.What is the process for return or replacement of AD7734BRUZ?
All AD7734BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7734BRUZ, 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 AD7734BRUZ part is unused and in its original packaging.
Return procedure for AD7734BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7734BRUZ 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…
