My Inquiry
My Account
Analog Devices Inc. AD7998BRUZ-0
- Part No.:
- AD7998BRUZ-0
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7998BRUZ-0.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:447
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7998BRUZ-0 from Analog Devices is a 12-bit, 8-channel successive approximation ADC with I²C-compatible serial interface, 2 µs conversion time, 2.7–5.5 V supply range, and −40°C to +85°C operating temperature. It integrates an 8:1 analog multiplexer, track-and-hold amplifier, and programmable out-of-range alert for sensor monitoring in industrial data acquisition systems.
For engineers reviewing the AD7998BRUZ-0 datasheet, AD7998BRUZ-0 pinout, AD7998BRUZ-0 application, or AD7998BRUZ-0 equivalent, key selection considerations include its 12-bit resolution with ±1 LSB INL, I²C high-speed mode support (up to 3.4 MHz), 11 MHz full-power bandwidth, REFIN voltage range (1.2 V to VDD), and 20-lead TSSOP package with pin-selectable addressing via AS.
Technical Context
The AD7998BRUZ-0 implements a successive approximation register (SAR) architecture with integrated 8-channel analog multiplexer and track-and-hold, supporting single-ended inputs up to 11 MHz. Its I²C interface supports standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes-enabled only on the -1 variant, but AD7998BRUZ-0 is the -0 version and thus supports up to 400 kHz.
Conversion is initiated via CONVST pin edge, I²C command write, or automatic cycle timer; internal registers store conversion results, high/low limits, hysteresis, and configuration. The ALERT/BUSY pin operates as open-drain out-of-range indicator when enabled, driven by violation of programmed DATAHIGH/DATALOW thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic output and no missing codes across full scale. |
| Conversion Time | 2 µs typical - enables sampling at up to 121 kSPS in Mode 1 with 400 kHz I²C clock. |
| SINAD | 70.5 dB min at 10 kHz input - defines usable dynamic range for precision sensor digitization. |
| I²C Clock Support | Up to 400 kHz - matches Fast Mode; AD7998BRUZ-0 does not support High Speed Mode (3.4 MHz). |
| Input Voltage Range | 0 V to REFIN - requires external reference (1.2 V to VDD) applied to REFIN pin for full-scale scaling. |
| Power Consumption | 0.15 mA max active (3.3 V, 400 kHz I²C) - enables low-power operation in battery-backed systems. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments without derating. |
Pinout & Package
AD7998BRUZ-0 is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed pad for thermal performance. Pin functions are validated per Analog Devices Rev. 0 datasheet Figure 3 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4, 20 | AGND | Analog ground reference for all internal circuitry and analog inputs; must be low-impedance and separated from digital ground. |
| 2, 5 | VDD | Single 2.7–5.5 V power supply; powers analog and digital sections; decoupling required near pins. |
| 6 | REFIN | External reference input (1.2 V to VDD); sets full-scale range; requires 0.1 µF + 1 µF bypass to AGND. |
| 7, 8, 9, 10, 11, 12, 13, 14 | VIN1–VIN8 | Eight single-ended analog inputs; each accepts 0 V to REFIN; multiplexed internally before SAR conversion. |
| 15 | AS | Address select logic input; sets one of three I²C addresses (AGND = 0x41, VDD = 0x42, float = 0x40) per Table 6. |
| 16 | CONVST | Rising-edge–triggered wake-up signal; falling edge initiates conversion after 1 µs power-up delay. |
| 17 | ALERT/BUSY | Open-drain configurable output; defaults to ALERT (out-of-range interrupt) unless reconfigured via register. |
| 18 | SDA | I²C bidirectional data line; requires external pull-up; supports standard/fast mode only (≤400 kHz). |
| 19 | SCL | I²C clock input; open-drain; requires external pull-up; timing compliant with Table 3 Fast Mode specs. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel single-ended multiplexer | Reduces external signal conditioning components; enables compact multi-sensor monitoring without external MUX IC. |
| Programmable out-of-range alert | Eliminates host polling overhead by generating hardware interrupt on threshold violation using DATAHIGH/DATALOW registers. |
| Automatic shutdown between conversions | Minimizes quiescent current to 1 µA max in power-down mode, extending battery life in portable instrumentation. |
| Pin-selectable I²C address | Allows up to three AD7998BRUZ-0 devices on same bus (via AS pin states), simplifying multi-channel system scalability. |
| Internal register structure | Enables flexible configuration of conversion mode, limit thresholds, hysteresis, and cycle timing without external memory. |
Applications
| Industrial Sensor Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous voltage/current measurement from 8 thermocouples, RTDs, or pressure transducers in PLC backplanes. IC Role / Device Role / Timing Role: 12-bit SAR ADC with integrated MUX and I²C interface performs synchronized channel scanning and alerts on out-of-spec readings. Use Value: Eliminates need for discrete MUX + ADC combinations; reduces BOM count and PCB area while maintaining 70.5 dB SINAD at 10 kHz. |
Use Scenario: Multi-point calibration and pass/fail testing of analog outputs in benchtop ATE fixtures. IC Role / Device Role / Timing Role: Precision digitizer capturing transient waveforms and DC levels across eight DUT channels via I²C-controlled sequencing. Use Value: 2 µs conversion time enables >100 kSPS throughput per channel in burst mode; REFIN flexibility supports variable test range standards. |
| Building Energy Management Systems | Medical Diagnostic Instrumentation |
Use Scenario: HVAC control unit measuring temperature, humidity, CO₂, and airflow across distributed zones. IC Role / Device Role / Timing Role: Low-power ADC acquiring slow-varying environmental signals with autonomous alerting on threshold breaches. Use Value: 1 µA shutdown current extends battery life in wireless sensor nodes; ALERT pin drives MCU interrupt without polling. |
Use Scenario: Portable ECG or patient monitor digitizing biopotential signals from multiple electrodes. IC Role / Device Role / Timing Role: Medical-grade front-end ADC providing 12-bit resolution and channel isolation >90 dB for artifact rejection. Use Value: Channel-to-channel isolation of −90 dB minimizes crosstalk between differential lead pairs; −40°C to +85°C rating supports clinical deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7998BRUZ-1 | Supports I²C high-speed mode (3.4 MHz); higher throughput (188 kSPS @ 5 V); identical pinout and register map. | Required where >400 kHz I²C bandwidth or >121 kSPS sustained rate is needed. | Select AD7998BRUZ-1 if system uses high-speed I²C infrastructure and demands maximum sample rate; otherwise AD7998BRUZ-0 suffices for standard/fast-mode buses. |
| ADS7957IRSBT | 12-bit, 8-channel SAR ADC with SPI interface; 1.25 µs conversion; 2.7–5.25 V supply; no built-in alert function or I²C. | Suitable for SPI-based microcontrollers; lacks programmable alert and I²C address selection. | Choose ADS7957IRSBT when SPI is preferred over I²C and external interrupt logic can replace ALERT functionality. |
Compared with AD7998BRUZ-1, the AD7998BRUZ-0 trades I²C speed for broader compatibility with legacy controllers; versus ADS7957IRSBT, it offers native I²C integration and hardware alerting but requires I²C bus management instead of simpler SPI framing.
Availability
AD7998BRUZ-0 is available at Aetrix Electronics and suitable for industrial sensor monitoring, automated test equipment, building energy management systems, and medical diagnostic instrumentation requiring stable component supply and long-term manufacturability.
Supply support for AD7998BRUZ-0 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 and manufacturing expertise spanning precision data conversion, amplification, and power management.
The AD7998 is part of Analog Devices' I²C-compatible precision ADC family, designed specifically for space-constrained, low-power industrial and instrumentation applications requiring multi-channel analog sensing with minimal external components.
FAQ
What is the maximum I²C clock frequency supported by AD7998BRUZ-0?
The AD7998BRUZ-0 supports I²C standard mode (100 kHz) and fast mode (400 kHz) only. It does not support high-speed mode (3.4 MHz), which is exclusive to the AD7998BRUZ-1 variant. This limitation is defined in the AD7998 Specifications table (Page 5) and confirmed in the I²C Timing Specifications section (Table 3), where high-speed timing parameters are explicitly marked "AD7997-1/AD7998-1 only."
Does AD7998BRUZ-0 require an external reference voltage?
Yes, AD7998BRUZ-0 requires an external reference voltage applied to the REFIN pin. The reference must be in the range of 1.2 V to VDD (2.7–5.5 V), and the analog input range is 0 V to REFIN. No internal reference is provided; bypassing with 0.1 µF and 1 µF capacitors to AGND is mandatory per the Typical Connection Diagram (Page 16).
How many analog input channels does AD7998BRUZ-0 have, and what type are they?
The AD7998BRUZ-0 has eight single-ended analog input channels (VIN1 through VIN8). Each channel accepts a unipolar voltage from 0 V to REFIN. The device contains an internal 8:1 multiplexer and track-and-hold amplifier, enabling sequential sampling without external switching components.
Can AD7998BRUZ-0 operate from a 3.3 V supply?
Yes, AD7998BRUZ-0 is fully specified for VDD = 2.7 V to 5.5 V, including 3.3 V operation. All electrical characteristics-including 12-bit resolution, ±1 LSB INL, 70.5 dB SINAD, and 1 µA shutdown current-are guaranteed across this range. Power consumption at 3.3 V is 0.15 mA max active (400 kHz I²C) and 1 µA max in shutdown mode.
What is the function of the AS pin on AD7998BRUZ-0?
The AS (Address Select) pin on AD7998BRUZ-0 configures one of three I²C slave addresses: tied to AGND (0x41), VDD (0x42), or left floating (0x40). This allows up to three AD7998BRUZ-0 devices to share the same I²C bus without address conflict, as documented in Table 6 of the datasheet. No external resistor is required-direct connection suffices.
AD7998BRUZ-0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 188k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7998BRUZ-0 FAQ
1.How can I place an order for AD7998BRUZ-0 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7998BRUZ-0 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 AD7998BRUZ-0 reliable?
The price and inventory of AD7998BRUZ-0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7998BRUZ-0 is usually 5 days.
3.What payment methods are accepted for AD7998BRUZ-0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7998BRUZ-0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7998BRUZ-0?
AD7998BRUZ-0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7998BRUZ-0 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 AD7998BRUZ-0?
For technical support, including AD7998BRUZ-0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7998BRUZ-0 requirements.
6.How does Aetrix verify that AD7998BRUZ-0 is sourced from the original manufacturer or authorized distributors?
All AD7998BRUZ-0 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 AD7998BRUZ-0 meets industry standards.
7.What is the process for return or replacement of AD7998BRUZ-0?
All AD7998BRUZ-0 units undergo pre-shipment inspection (PSI). If there is an issue with AD7998BRUZ-0, 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 AD7998BRUZ-0 part is unused and in its original packaging.
Return procedure for AD7998BRUZ-0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7998BRUZ-0 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…
