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Analog Devices Inc. AD7788ARMZ
- Part No.:
- AD7788ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7788ARMZ.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:258
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Product details
Overview
AD7788ARMZ from Analog Devices is a low-power, 16-bit sigma-delta analog-to-digital converter (ADC) with differential input, 16.6 Hz output update rate, 1.5 µV rms noise, and integrated VDD monitor channel. It operates from a single 2.5 V to 5.25 V supply, consumes ≤75 µA in normal mode, and targets precision sensor measurement in battery-powered instrumentation.
For engineers reviewing the AD7788ARMZ datasheet, AD7788ARMZ pinout, AD7788ARMZ application, or AD7788ARMZ equivalent, key selection criteria include its simultaneous 50/60 Hz rejection, internal clock oscillator eliminating external timing components, MSOP-10 package compatibility with space-constrained layouts, and guaranteed 16-bit no-missing-codes performance over −40°C to +105°C (B grade).
Technical Context
The AD7788ARMZ implements a fully differential sigma-delta modulator with on-chip digital filtering optimized for low-frequency DC and near-DC signals. Its architecture delivers simultaneous 50 Hz and 60 Hz line frequency rejection without external notch filters, enabled by a fixed 16.6 Hz output data rate synchronized to the internal oscillator.
It features a dedicated VDD monitor channel (CH1=CH0=11), unbuffered differential analog input (AIN+/AIN−), and reference input range of 0.1 V to VDD. The device supports bipolar/unipolar coding via the U/B bit and uses offset binary output format, with all register access handled through a 3-wire SPI-compatible serial interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit p-p (guaranteed no missing codes); enables 1 part in 65,536 measurement granularity for full-scale sensor spans. |
| Output Update Rate | 16.6 Hz nominal; provides inherent 50/60 Hz rejection without software or external filtering. |
| RMS Noise | 1.5 µV typical; supports sub-µV-level signal resolution in low-noise sensor front ends. |
| Supply Current | 75 µA maximum (normal mode); allows multi-year operation on coin-cell batteries in portable systems. |
| Integral Nonlinearity | ±15 ppm of FSR max (B grade); ensures <0.002% end-point error across temperature for calibrated transducers. |
| Operating Voltage | 2.5 V to 5.25 V; compatible with both 3 V and 5 V system rails without level-shifting circuitry. |
| Temperature Range | −40°C to +105°C (B grade); qualified for industrial and automotive under-hood sensor applications. |
Pinout & Package
AD7788ARMZ is housed in a 10-lead MSOP (Mini Small Outline Package) with 0.5 mm pitch, designed for compact PCB layouts and automated assembly. Thermal impedance θJA = 206°C/W supports operation in thermally constrained enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Schmitt-triggered input enables robust interfacing with opto-isolators or noisy microcontroller clocks; supports continuous or burst-mode clocking. |
| CS | Chip select (active low) | Enables 3-wire operation when hardwired low; serves as frame sync in multi-device SPI buses. |
| AIN(+) | Differential analog input (+) | Unbuffered high-impedance input; accepts ±REFIN differential voltage range referenced to AIN(−). |
| AIN(−) | Differential analog input (−) | Reference terminal for differential input; also selectable as shorted input (AIN−/AIN−) for offset calibration. |
| REFIN(+) | Positive reference input | Nominal 2.5 V reference; functional with 0.1 V to VDD range, enabling ratiometric or self-referenced measurements. |
| REFIN(−) | Negative reference input | Ground or negative reference point; defines reference span with REFIN(+); supports ground-referenced or floating references. |
| GND | Analog/digital ground | Single ground pin shared for analog and digital sections; requires star grounding for optimal noise performance. |
| VDD | Power supply | Single 2.5–5.25 V rail powers analog core, digital logic, and internal oscillator; no separate AVDD/DVDD required. |
| DOUT/RDY | Data output / ready indicator | Open-drain output signals conversion completion (low pulse); doubles as serial data output during read cycles. |
| DIN | Serial data input | Accepts 8-bit communications register writes and subsequent register reads/writes; supports interface recovery via 32-bit DIN-high reset. |
Key Features
| Feature | Design Value |
|---|---|
| Internal clock oscillator | Eliminates external crystal or clock generator, reducing BOM count and layout area while ensuring precise 16.6 Hz update timing. |
| VDD monitor channel | Measures supply voltage (divided by 5) using internal 1.17 V reference, enabling real-time power rail health monitoring without external components. |
| Simultaneous 50/60 Hz rejection | Hardware-based line-frequency rejection at fixed 16.6 Hz output rate avoids firmware overhead and guarantees consistent AC interference suppression. |
| Low power-down current | 1 µA maximum shutdown current extends battery life in wake-on-event sensor nodes where ADC remains idle >99% of time. |
| Offset binary output coding | Provides intuitive zero-centered digital representation for unipolar systems, simplifying firmware scaling and eliminating two's-complement conversion logic. |
Applications
| Smart Transmitters | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: 4–20 mA loop-powered pressure or temperature transmitter operating in hazardous industrial environments. IC Role / Device Role / Timing Role: Precision analog front-end ADC digitizing sensor bridge output with ratiometric reference derived from loop supply. Use Value: 16-bit resolution and 1.5 µV rms noise enable <0.1% FS accuracy; internal VDD monitor validates loop integrity before each conversion. |
Use Scenario: Handheld multimeter or portable gas detector requiring multi-year battery life and stable readings under varying ambient conditions. IC Role / Device Role / Timing Role: Low-power sigma-delta ADC acquiring thermistor or electrochemical sensor outputs with automatic line-frequency rejection. Use Value: 75 µA active current and 1 µA power-down current maximize runtime; 16.6 Hz update rate eliminates need for external 50/60 Hz filter components. |
| Temperature Measurement | Weigh Scales |
|
Use Scenario: Industrial oven controller using RTD or thermocouple with cold-junction compensation. IC Role / Device Role / Timing Role: High-accuracy ADC measuring low-level thermocouple voltage or RTD bridge excitation with programmable bipolar/unipolar coding. Use Value: ±15 ppm INL ensures traceable calibration across −40°C to +105°C; differential input rejects common-mode noise from heater EMI. |
Use Scenario: Platform scale or retail weighing system requiring high-resolution load cell digitization with minimal external circuitry. IC Role / Device Role / Timing Role: Sigma-delta ADC directly interfacing to Wheatstone bridge load cell with internal reference and gain-free architecture. Use Value: 16-bit p-p resolution resolves sub-gram changes on 10 kg platforms; simultaneous 50/60 Hz rejection prevents flicker in AC-powered facilities. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7789ARMZ | 24-bit resolution, 19-bit p-p, higher RMS noise (1.5 µV same), identical pinout and interface. | Used where ultra-high dynamic range is required (e.g., precision weigh scales), not for cost-optimized 16-bit systems. | Select AD7789ARMZ only if 24-bit resolution is mandatory; AD7788ARMZ offers lower cost and same footprint for 16-bit use cases. |
| ADS1115IDGSR | 16-bit, I²C interface, 860 SPS max, no internal oscillator, requires external clock or MCU timing control. | Preferred in I²C-based microcontroller systems; lacks simultaneous 50/60 Hz rejection and VDD monitor channel. | Choose ADS1115IDGSR for I²C convenience and higher speed; AD7788ARMZ is superior for AC-line-noise immunity and autonomous operation. |
Compared with AD7789ARMZ, AD7788ARMZ trades resolution for lower cost and identical integration; versus ADS1115IDGSR, it delivers hardware-based line rejection and self-timed operation at the expense of interface flexibility.
Availability
AD7788ARMZ is available at Aetrix Electronics and suitable for smart transmitters, battery-powered instrumentation, and industrial temperature measurement requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7788ARMZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7788ARMZ belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for low-power, high-accuracy DC measurement in sensor signal chains where noise, line rejection, and supply autonomy are critical.
FAQ
What is the guaranteed resolution and no-missing-codes specification for AD7788ARMZ?
The AD7788ARMZ guarantees 16-bit no-missing-codes performance across its full operating temperature range (−40°C to +105°C, B grade). Its 16-bit peak-to-peak resolution ensures monotonic output with no code gaps, validated per Table 2 in the Rev. C datasheet. This makes AD7788ARMZ suitable for closed-loop control and metrology-grade applications where code continuity is essential.
Does AD7788ARMZ require an external clock source?
No, AD7788ARMZ does not require an external clock source. It integrates a precision internal oscillator that drives the sigma-delta modulator and digital filter at a fixed 16.6 Hz output data rate. This eliminates external crystals, oscillators, or clock routing, simplifying design and improving reliability-key advantages of the AD7788ARMZ in space- and cost-constrained systems.
How does the VDD monitor channel function in AD7788ARMZ?
The AD7788ARMZ VDD monitor channel (selected via CH1=CH0=11 in the communications register) measures the supply voltage by dividing VDD by 5 internally and converting it against the on-chip 1.17 V reference. This enables real-time supply health checks without external resistive dividers. The result appears in the AD7788ARMZ data register alongside sensor conversions, supporting fail-safe system diagnostics.
What packaging and thermal specifications apply to AD7788ARMZ?
AD7788ARMZ is supplied in a 10-lead MSOP package (3.0 mm × 3.0 mm × 1.0 mm height) with 0.5 mm lead pitch. Its thermal characteristics include θJA = 206°C/W and θJC = 44°C/W, supporting operation up to +105°C ambient when properly mounted on standard FR-4 PCBs with adequate copper pour. The MSOP footprint ensures compatibility with automated SMT assembly lines.
Can AD7788ARMZ reject both 50 Hz and 60 Hz interference simultaneously?
Yes, AD7788ARMZ provides simultaneous 50 Hz and 60 Hz rejection by design. Its fixed 16.6 Hz output update rate creates a digital filter response with deep nulls at both frequencies-verified in Figure 6 of the datasheet. This hardware-based rejection occurs without firmware intervention or external components, making AD7788ARMZ ideal for global deployments where mains frequency varies by region.
AD7788ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 16.6
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI, DSP
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.5V ~ 5.25V
- Voltage - Supply, Digital:
- 2.5V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7788ARMZ FAQ
1.How can I place an order for AD7788ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7788ARMZ 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 AD7788ARMZ reliable?
The price and inventory of AD7788ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7788ARMZ is usually 5 days.
3.What payment methods are accepted for AD7788ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7788ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7788ARMZ?
AD7788ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7788ARMZ 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 AD7788ARMZ?
For technical support, including AD7788ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7788ARMZ requirements.
6.How does Aetrix verify that AD7788ARMZ is sourced from the original manufacturer or authorized distributors?
All AD7788ARMZ 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 AD7788ARMZ meets industry standards.
7.What is the process for return or replacement of AD7788ARMZ?
All AD7788ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7788ARMZ, 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 AD7788ARMZ part is unused and in its original packaging.
Return procedure for AD7788ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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