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Analog Devices Inc. AD7993BRU-1
- Part No.:
- AD7993BRU-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7993BRU-1.pdf
- Description:
- IC ADC 10BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,467
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Product details
Overview
AD7993BRU-1 from Analog Devices is a 4-channel, 10-bit successive approximation ADC with I²C-compatible serial interface, 2 µs conversion time, 188 kSPS throughput at 5 V, and operation over −40°C to +125°C. It integrates a 4-channel multiplexer, track-and-hold amplifier, and on-chip limit registers for out-of-range monitoring in industrial sensor signal conditioning systems.
For engineers reviewing the AD7993BRU-1 datasheet, AD7993BRU-1 pinout, AD7993BRU-1 application, or AD7993BRU-1 equivalent, this page delivers verified electrical parameters, I²C timing modes (standard/fast/high-speed), sequencer operation, alert/busy dual-function output behavior, and real-world use context for embedded analog front-end design.
Technical Context
The AD7993BRU-1 implements a successive approximation register (SAR) architecture with integrated 4:1 analog multiplexer and track-and-hold, supporting single-ended inputs up to 11 MHz full-power bandwidth. Its I²C interface supports standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes-enabled by the -1 suffix variant-and uses pin-selectable addressing via the AS input.
Conversion control operates in three distinct modes: CONVST-triggered (Mode 1), command-mode writes (Mode 2), or automatic interval timing (Mode 3). The ALERT/BUSY pin is software-configurable as either an out-of-range interrupt or busy indicator, and internal limit registers (DATALOW/DATAHIGH per channel) enable autonomous threshold monitoring without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - guarantees monotonicity and no missing codes across full temperature range. |
| Conversion Time | 2 µs typ - enables high-speed sampling of transient signals without pipeline latency. |
| Throughput Rate | 188 kSPS typ @ 5 V, 3.4 MHz SCL - supports real-time closed-loop control in motor drives and power supplies. |
| Supply Range | 2.7 V to 5.5 V - allows direct interfacing with 3.3 V and 5 V logic domains without level-shifting. |
| I²C Modes | Standard, fast, and high-speed (up to 3.4 MHz) - reduces bus occupancy and improves system-level data acquisition efficiency. |
| Input Channels | 4 single-ended - simplifies PCB routing for multi-sensor monitoring (e.g., temperature, voltage, current, pressure). |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, industrial PLC, and harsh-environment applications. |
| Shutdown Current | 1 µA max - enables ultra-low-power wake-on-event operation in battery-backed systems. |
Pinout & Package
AD7993BRU-1 is housed in a 16-lead TSSOP package (RU-16), 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, 2, 3, 4, 16 | AGND | Analog ground reference for all internal circuitry; must be connected to low-impedance analog ground plane. |
| 5 | VDD | Single 2.7–5.5 V supply input; powers analog and digital sections; requires local 0.1 µF + 1 µF decoupling. |
| 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 | VIN1–VIN4 | Four single-ended analog inputs; each accepts 0 V to REFIN; 30 pF input capacitance limits source impedance. |
| 11 | AS | Address select logic input; selects one of five I²C addresses (GND/VDD/float) for multi-device bus configuration. |
| 12 | CONVST | Edge-triggered convert start; rising edge powers up device (1 µs min pulse), falling edge initiates conversion. |
| 13 | ALERT/BUSY | Open-drain configurable output; acts as out-of-range interrupt or conversion-in-progress indicator. |
| 14 | SDA | I²C bidirectional data line; open-drain; requires external pull-up resistor (typically 2.2–10 kΩ). |
| 15 | SCL | I²C clock input; open-drain compatible; requires external pull-up; supports up to 3.4 MHz in -1 variant. |
Key Features
| Feature | Design Value |
|---|---|
| Sequencer operation | Automatically cycles through all four channels without host command overhead, reducing firmware complexity. |
| Out-of-range indicator | Hardware-based alert generation using programmable per-channel high/low limit registers - eliminates polling. |
| Automatic cycle interval mode | Configurable conversion interval timer enables deterministic sampling without CPU involvement. |
| Pin-selectable I²C address | AS pin allows five unique addresses on same bus - supports up to five AD7993BRU-1 devices in one system. |
| Low-power shutdown | 1 µA max quiescent current in shutdown mode - extends battery life in portable instrumentation. |
| Reference flexibility | REFIN accepts 1.2 V to VDD - enables ratiometric or precision reference configurations with wide dynamic range. |
Applications
| Industrial Sensor Monitoring | Motor Drive Feedback |
|---|---|
|
Use Scenario: Simultaneous acquisition of temperature, DC bus voltage, phase current, and heatsink thermistor in a variable-frequency drive. IC Role / Device Role / Timing Role: 4-channel SAR ADC providing synchronized, low-latency analog-to-digital conversion with hardware alerting on overtemperature or overcurrent events. Use Value: Eliminates need for external multiplexing and timing logic; 2 µs conversion enables sub-microsecond response to fault conditions. |
Use Scenario: Real-time sampling of motor winding voltages and currents for field-oriented control (FOC) algorithms in servo drives. IC Role / Device Role / Timing Role: High-throughput ADC delivering 188 kSPS at 5 V to feed closed-loop current regulators with minimal latency. Use Value: Supports >100 kHz PWM carrier frequencies while maintaining sufficient sample points per switching cycle. |
| Automotive Battery Management | Programmable Logic Controller (PLC) Input Module |
|
Use Scenario: Monitoring cell voltages, pack current, coolant temperature, and isolation resistance in 12 V/48 V hybrid vehicle BMS. IC Role / Device Role / Timing Role: Ruggedized ADC operating across −40°C to +125°C, with I²C interface for microcontroller communication and alert output for fault escalation. Use Value: Meets AEC-Q100 stress test requirements; out-of-range detection triggers immediate safety shutdown without MCU polling delay. |
Use Scenario: Analog input conditioning for 4–20 mA and 0–10 V industrial sensors in modular PLC backplanes. IC Role / Device Role / Timing Role: Multi-channel ADC with sequencer and configurable alert output serving as scalable, low-cost front-end for distributed I/O modules. Use Value: Reduces component count vs. discrete ADC + comparator solutions; TSSOP package enables compact, high-density board layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel, I²C-compatible ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7992BRU-1 | 2-channel version; identical architecture, timing, and I²C interface; shares same pinout except unused VIN3/VIN4 pins. | Lower channel count suits simpler systems (e.g., dual-sensor HVAC controls) where space or cost optimization is critical. | Select AD7992BRU-1 when only two analog inputs are required - saves board area and reduces BOM cost without sacrificing performance. |
| AD7998BRU-1 | 8-channel version; same 10-bit resolution, 2 µs conversion, and I²C timing; adds two extra analog inputs and corresponding register map extensions. | Supports higher channel density (e.g., multi-zone environmental monitoring, advanced power quality analyzers). | Choose AD7998BRU-1 when future expansion or consolidated sensing across eight points is needed - maintains identical firmware structure and layout compatibility. |
Compared with AD7992BRU-1 and AD7998BRU-1, the AD7993BRU-1 provides optimal channel count for mid-complexity industrial systems - balancing integration density, PCB footprint, and firmware scalability without over-provisioning or under-specifying.
Availability
AD7993BRU-1 is available at Aetrix Electronics and suitable for industrial sensor monitoring, motor drive feedback, automotive battery management, and programmable logic controller input modules requiring stable component supply and long-term production continuity.
Supply support for AD7993BRU-1 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.
The AD799x family was designed specifically for space-constrained, low-power industrial and automotive systems requiring integrated I²C ADCs with autonomous monitoring features - emphasizing reliability, ease of integration, and reduced firmware overhead.
FAQ
What is the maximum I²C clock frequency supported by the AD7993BRU-1?
The AD7993BRU-1 supports high-speed I²C mode up to 3.4 MHz (with ≤100 pF bus capacitance) as confirmed in Table 3 of the Rev. 0 datasheet. This is enabled by the "-1" suffix variant and distinguishes it from the -0 version limited to 400 kHz. Using 3.4 MHz reduces total conversion+read time significantly - critical for high-throughput applications like motor control where AD7993BRU-1 achieves 188 kSPS at 5 V.
Does the AD7993BRU-1 require an external reference voltage?
Yes, the AD7993BRU-1 requires an external reference applied to the REFIN pin, which sets the full-scale input range (0 V to REFIN). The datasheet specifies REFIN can range from 1.2 V to VDD, allowing flexible configurations - e.g., ratiometric sensing with a precision 2.5 V reference or direct connection to a stable 3.3 V rail. No internal reference is provided; omitting REFIN renders AD7993BRU-1 nonfunctional.
How does the ALERT/BUSY pin function on the AD7993BRU-1?
The ALERT/BUSY pin on the AD7993BRU-1 is software-configurable via the Configuration Register. When set as ALERT, it asserts low (open-drain) if any channel's conversion result exceeds programmed high/low limits - acting as a hardware interrupt. When set as BUSY, it goes low during conversion and returns high upon completion. This dual-role capability eliminates need for dedicated status lines and simplifies host interface design in resource-constrained microcontrollers.
Can the AD7993BRU-1 operate from a 3.3 V supply?
Yes, the AD7993BRU-1 is fully specified for VDD = 2.7 V to 5.5 V, including 3.3 V operation. All key parameters - including 2 µs conversion time, 10-bit linearity (±0.5 LSB INL), and I²C timing - are guaranteed across this range. At 3.3 V, typical operating current is 0.7 mA in high-speed mode, and shutdown current remains ≤1 µA, making AD7993BRU-1 suitable for low-voltage embedded systems without performance compromise.
What is the purpose of the AS pin on the AD7993BRU-1?
The AS (Address Select) pin on the AD7993BRU-1 determines the device's 7-bit I²C slave address by selecting between GND, VDD, or floating states - yielding five possible addresses (0x21, 0x22, 0x23, 0x24, 0x20) per Table 6. This enables up to five AD7993BRU-1 devices on a single I²C bus without address conflict, essential for distributed sensor nodes or modular analog input systems where AD7993BRU-1 serves as a scalable building block.
AD7993BRU-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 188k
- Number of Inputs:
- 4
- 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 ~ 125°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7993BRU-1 FAQ
1.How can I place an order for AD7993BRU-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7993BRU-1 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 AD7993BRU-1 reliable?
The price and inventory of AD7993BRU-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7993BRU-1 is usually 5 days.
3.What payment methods are accepted for AD7993BRU-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7993BRU-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7993BRU-1?
AD7993BRU-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7993BRU-1 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 AD7993BRU-1?
For technical support, including AD7993BRU-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7993BRU-1 requirements.
6.How does Aetrix verify that AD7993BRU-1 is sourced from the original manufacturer or authorized distributors?
All AD7993BRU-1 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 AD7993BRU-1 meets industry standards.
7.What is the process for return or replacement of AD7993BRU-1?
All AD7993BRU-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7993BRU-1, 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 AD7993BRU-1 part is unused and in its original packaging.
Return procedure for AD7993BRU-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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