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Analog Devices Inc. AD7783BRUZ
- Part No.:
- AD7783BRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7783BRUZ.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
AD7783BRUZ from Analog Devices is a read-only, pin-configured 24-bit sigma-delta ADC optimized for low-frequency sensor measurement. It features dual 200 µA excitation current sources, ±160 mV or ±2.56 V programmable input ranges via RANGE pin, fixed 19.79 Hz output update rate, and simultaneous 50/60 Hz rejection-enabling high-accuracy weigh-scale and RTD temperature sensing in industrial process control systems.
For engineers reviewing the AD7783BRUZ datasheet, AD7783BRUZ pinout, AD7783BRUZ application, or AD7783BRUZ equivalent, this page delivers verified technical context, real-world design meaning of key specs, TSSOP-16 package details, and two validated alternative parts with precise functional and application-level differences.
Technical Context
The AD7783BRUZ integrates a fully differential analog input channel with rail-to-rail buffered PGA (gain = 1 or 16), on-chip 32.768 kHz crystal oscillator with PLL, and digital filter tuned for notch rejection at both 50 Hz and 60 Hz. Its read-only interface operates in master or slave mode using only CS, SCLK, DOUT/RDY, and MODE pins-no register programming required.
All configuration is hardware-driven: RANGE selects ±160 mV or ±2.56 V full-scale range; IPIN routes internal 200 µA current sources to IOUT1/IOUT2; MODE sets master (SCLK output) or slave (SCLK input) serial operation. The device achieves 18.5-bit p-p resolution at ±2.56 V range and 16.5-bit p-p at ±160 mV range, with 24-bit no-missing-codes performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no missing codes; ensures unambiguous digital representation across full dynamic range without code gaps. |
| Update Rate | Fixed 19.79 Hz; enables deterministic timing for synchronized multi-channel sampling and eliminates software-based rate tuning. |
| Input Ranges | Pin-selectable ±160 mV (RANGE = 0) or ±2.56 V (RANGE = 1); supports direct connection to low-output bridges and high-level industrial sensors. |
| Excitation Sources | Dual 200 µA matched current sources; excites RTDs or resistive bridges without external components, reducing BOM count and layout complexity. |
| Power Consumption | 1.3 mA @ 3 V normal mode; enables battery-powered portable instrumentation with >1-year runtime on typical coin-cell configurations. |
| Common-Mode Rejection | ≥105 dB @ DC (±160 mV range); rejects ground-loop noise and supply coupling in noisy industrial environments. |
| Normal-Mode Rejection | 60 dB @ 50 Hz, 94 dB @ 60 Hz; suppresses mains-borne interference without external notch filters or synchronous sampling. |
Pinout & Package
AD7783BRUZ is housed in a 16-lead TSSOP (RU-16) package with 0.65 mm pitch, JEDEC MO-153-AB compliant, suitable for automated assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN(+), AIN(–) | Fully differential analog input pair | Accepts bipolar signals referenced to each other; supports up to ±2.56 V range with 100 mV headroom from rails. |
| REFIN(+), REFIN(–) | Differential reference input | Unbuffered 2.5 V nominal reference; functional from 1 V to VDD, enabling ratiometric operation with excitation sources. |
| IOUT1, IOUT2 | Current source outputs | Deliver 200 µA each; routed via IPIN to drive external bridge legs or RTD elements without external drivers. |
| RANGE | Input range selection | Hardware-configured gain: RANGE = 0 → ±160 mV (PGA = 16); RANGE = 1 → ±2.56 V (PGA = 1). |
| IPIN | Current source routing control | GND → IEXC1→IOUT1, IEXC2→IOUT2; VDD → IEXC1→IOUT2, IEXC2→IOUT1; enables flexible 3-/4-wire RTD wiring. |
| MODE | Serial interface mode select | Low → master mode (SCLK output); high → slave mode (SCLK input); eliminates need for external clock generator. |
| CS | Chip select / power control | Active-low enable: initiates conversion and PLL lock when low; places device in 9 µA power-down state when high. |
| DOUT/RDY | Data output / ready indicator | Functions as interrupt-ready signal (low = data valid) and serial data line; simplifies microcontroller polling or IRQ handling. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-configured operation | No firmware or register writes needed-configuration via RANGE, IPIN, and MODE pins reduces startup time and firmware overhead. |
| Simultaneous 50/60 Hz rejection | Digital filter notches placed at both frequencies eliminate need for external line-frequency filtering or dual-sampling schemes. |
| Rail-to-rail input buffer | Supports high-impedance sensor sources (e.g., strain gages, thermistors) and allows RC anti-aliasing directly at input pins. |
| Integrated 200 µA current sources | Matched to ±2.5% at 25°C and drift ≤20 ppm/°C; enables precision 3-wire RTD measurements without external DACs or op-amps. |
| Single-supply operation | Operates from 2.7–3.6 V or 4.75–5.25 V; eliminates dual-rail supplies and simplifies power architecture in mixed-signal systems. |
Applications
| Industrial Weigh Scales | RTD Temperature Measurement |
|---|---|
|
Use Scenario: High-resolution weight measurement in platform scales and hopper load cells using full-bridge strain gage sensors. IC Role / Device Role / Timing Role: Primary ADC front end with integrated excitation and PGA; provides 19.79 Hz stable update rate synchronized to mains rejection. Use Value: Achieves 18.5-bit p-p resolution at ±2.56 V range, eliminating external amplification and enabling <10 mg readability in 10 kg full-scale designs. |
Use Scenario: Precision 3-wire Pt100 RTD measurement in HVAC controllers and process transmitters. IC Role / Device Role / Timing Role: Sensor interface IC with matched current sources and ratiometric reference support; uses IPIN to route excitation and compensate lead resistance. Use Value: Delivers 16.5-bit p-p resolution at ±160 mV range with <0.1°C accuracy over –40°C to +85°C, reducing calibration burden. |
| Pressure Transducer Signal Conditioning | Portable Battery-Powered Instrumentation |
|
Use Scenario: Low-power pressure sensing in medical infusion pumps and industrial diaphragm gauges. IC Role / Device Role / Timing Role: Analog front end with excitation, buffering, and sigma-delta conversion; operates from single 3 V supply with 1.3 mA current draw. Use Value: Enables direct bridge excitation and digitization with <0.05% FS linearity error, supporting ISO 80601 compliance without external regulators. |
Use Scenario: Handheld multimeters and field calibrators requiring long battery life and high DC accuracy. IC Role / Device Role / Timing Role: Core measurement engine with ultra-low power-down current (9 µA) and fast 300 ms wake-up from power-on. Use Value: Supports >2-year operation on CR2032 cell while maintaining 24-bit integrity and simultaneous 50/60 Hz rejection in variable AC environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7782BRUZ | No integrated excitation current sources; dual differential input channels instead of one. | Suitable for multi-sensor systems (e.g., dual RTD or strain gage arrays) but requires external current sources for resistive sensors. | Select AD7782BRUZ when measuring two independent low-level sensors simultaneously and external excitation is already available. |
| ADS124S08IPWR | 24-bit delta-sigma ADC with programmable registers, 4x GPIOs, and integrated PGA (1–128), but no built-in current sources. | Requires firmware initialization and SPI register writes; supports higher update rates (up to 4 kSPS) but lacks hardware-configured 19.79 Hz rejection. | Choose ADS124S08IPWR for flexible, software-tuned systems needing multiple gain settings or faster throughput, not for plug-and-play low-power sensor nodes. |
Compared with AD7783BRUZ, AD7782BRUZ offers dual inputs at the cost of excitation capability, while ADS124S08IPWR adds configurability and speed but removes hardware simplicity and guaranteed 50/60 Hz rejection-making AD7783BRUZ optimal for fixed-function, low-maintenance industrial sensor nodes.
Availability
AD7783BRUZ is available at Aetrix Electronics and suitable for industrial process control, weigh-scale manufacturing, and portable instrumentation requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for AD7783BRUZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and a legacy of precision data conversion innovation.
The AD778x family-including AD7783BRUZ-is engineered specifically for low-frequency, high-resolution sensor measurement in harsh industrial environments, emphasizing hardware simplicity, noise immunity, and ratiometric stability over software configurability.
FAQ
What is the primary function of the AD7783BRUZ in a sensor measurement system?
The AD7783BRUZ serves as a complete analog front end for low-frequency precision measurement, integrating a 24-bit sigma-delta ADC, pin-configurable PGA, dual 200 µA excitation sources, and digital filtering for simultaneous 50/60 Hz rejection. In systems like weigh scales or RTD transmitters, AD7783BRUZ replaces discrete op-amps, current sources, and filters-reducing component count and improving repeatability without firmware overhead.
How does the AD7783BRUZ achieve simultaneous 50 Hz and 60 Hz rejection?
The AD7783BRUZ uses an on-chip digital filter with notches precisely placed at both 50 Hz and 60 Hz, enabled by its fixed 19.79 Hz output update rate derived from a 32.768 kHz crystal and internal PLL. This architecture guarantees ≥60 dB rejection at 50 Hz and ≥94 dB at 60 Hz without external components or software intervention-making AD7783BRUZ ideal for global deployments where mains frequency varies.
Can the AD7783BRUZ operate with a reference voltage other than 2.5 V?
Yes-the AD7783BRUZ functions with differential reference voltages from 1 V to VDD, though 2.5 V is the nominal specification. When using non-2.5 V references, full-scale input ranges scale proportionally: e.g., with 3.0 V reference, ±160 mV range becomes ±192 mV. The AD7783BRUZ maintains ratiometric accuracy if the same source powers both excitation and reference, ensuring AD7783BRUZ remains stable despite reference drift.
What is the role of the IPIN pin on the AD7783BRUZ?
The IPIN pin controls routing of the two on-chip 200 µA current sources between IOUT1 and IOUT2. When IPIN = GND, IEXC1 drives IOUT1 and IEXC2 drives IOUT2; when IPIN = VDD, the routing swaps. This enables flexible 3-wire RTD configurations where one current source excites the sensor and the other compensates for lead resistance-ensuring accurate AD7783BRUZ measurements without external switching circuitry.
Does the AD7783BRUZ require external memory or configuration registers to operate?
No-the AD7783BRUZ is a read-only, pin-configured device with no programmable registers. All configuration (input range, current source routing, master/slave mode) is set via hardware pins (RANGE, IPIN, MODE), and conversion starts automatically upon CS assertion. This eliminates boot-time register initialization, reduces firmware complexity, and ensures deterministic behavior-key for safety-critical AD7783BRUZ deployments in industrial control.
AD7783BRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 19.79
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7783BRUZ FAQ
1.How can I place an order for AD7783BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7783BRUZ 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 AD7783BRUZ reliable?
The price and inventory of AD7783BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7783BRUZ is usually 5 days.
3.What payment methods are accepted for AD7783BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7783BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7783BRUZ?
AD7783BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7783BRUZ 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 AD7783BRUZ?
For technical support, including AD7783BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7783BRUZ requirements.
6.How does Aetrix verify that AD7783BRUZ is sourced from the original manufacturer or authorized distributors?
All AD7783BRUZ 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 AD7783BRUZ meets industry standards.
7.What is the process for return or replacement of AD7783BRUZ?
All AD7783BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7783BRUZ, 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 AD7783BRUZ part is unused and in its original packaging.
Return procedure for AD7783BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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