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Texas Instruments ADC08832IM
- Part No.:
- ADC08832IM
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADC08832IM.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,805
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Product details
Overview
ADC08832IM from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter with integrated 2-channel analog multiplexer, track/hold circuitry, and 3-wire serial interface (CS, CLK, DI/DO). It operates from a single 5V supply, delivers ±1 LSB total unadjusted error, and achieves up to 153 ksps sampling rate at 2 MHz clock. It is used in embedded sensor digitization where space-constrained, noise-immune serial data acquisition is required.
For engineers reviewing the ADC08832IM datasheet, ADC08832IM pinout, ADC08832IM application, or ADC08832IM equivalent, key selection considerations include its fixed internal VREF tied to VCC, differential/single-ended software-configurable input modes, 4 μs max conversion time, and SOIC/VSSOP-8 package compatibility with legacy ADC0832 designs.
Technical Context
The ADC08832IM implements a successive-approximation register (SAR) architecture with a built-in sample-and-hold and programmable 2-channel analog multiplexer. Its analog inputs accept voltages from GND −0.05 V to VCC +0.05 V, supporting single-ended, differential, and pseudo-differential configurations via 2-bit MUX address codes shifted in on the DI line.
Digital operation follows MICROWIRE-compatible 3-wire timing: CS low initiates conversion; DI accepts start bit + MUX address; DO outputs MSB-first conversion result after settling delay; and TRI-STATE output disables when CS returns high. Internal reference is fixed to VCC - eliminating external VREF components but limiting ratiometric flexibility compared to ADC08831.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete digital codes over full-scale input range. |
| Conversion Time | 4 μs maximum at 2 MHz clock - enables real-time sampling of signals up to ~153 ksps. |
| Total Unadjusted Error | ±1 LSB - guarantees monotonicity and no missing codes across −40°C to +85°C. |
| Supply Voltage Range | 4.5 V to 6.0 V - supports standard 5V systems with ±10% tolerance margin. |
| Power Dissipation | 8.5 mW typical active, 3.0 mW typical low-power mode - suitable for battery-backed or thermally constrained designs. |
| Analog Input Range | GND −50 mV to VCC +50 mV - accommodates small common-mode excursions without accuracy loss. |
| Input Configuration | Software-selectable single-ended or differential via 2-bit MUX address - eliminates need for external signal conditioning hardware. |
Pinout & Package
ADC08832IM is housed in an 8-pin SOIC (D) or VSSOP (DGK) surface-mount package, both measuring 3.9 mm × 4.9 mm (SOIC) or 3.0 mm × 3.0 mm (VSSOP), with 1.27 mm pitch. Pin functions are electrically identical across packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply | Provides power and serves as internal voltage reference source; must be bypassed with 0.1 μF ceramic capacitor near pin. |
| 2 - CH0 | Analog input channel 0 | Configurable as (+) or (−) terminal in differential mode, or as single-ended input; input impedance modeled as 300 Ω + 13 pF. |
| 3 - CH1 | Analog input channel 1 | Paired with CH0 for differential operation or used independently in single-ended mode; shares same input structure and leakage limits. |
| 4 - GND | Analog/digital ground | Single-point connection to system analog ground plane; critical for minimizing noise coupling into SAR conversion. |
| 5 - DI | Serial data input | Accepts start bit + 2-bit MUX address during CS low; ignored after conversion begins; compatible with CMOS/TTL logic levels. |
| 6 - CLK | Serial clock input | Drives internal timing; supports 10 kHz–2 MHz; 40–60% duty cycle required; rising edge clocks DI, falling edge clocks DO. |
| 7 - CS | Chip select | Active-low enable; must remain low for entire conversion; controls entry/exit from low-power mode (high = static current only). |
| 8 - DO | Serial data output | Tri-state output delivering MSB-first 8-bit result; enters high-impedance state when CS is high; shares net with DI in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates need for external sample-and-hold circuitry; captures analog input during conversion without external timing control. |
| 2-channel software-configurable MUX | Enables dynamic reconfiguration between single-ended and differential modes per conversion - reduces BOM count and PCB area. |
| VCC-referenced architecture | Removes external reference component and associated layout sensitivity; simplifies design for ratiometric transducer interfaces. |
| 3-wire MICROWIRE-compatible interface | Reduces interconnect count vs parallel ADCs; supports noise-immune digital transmission over longer traces or cables. |
| Low-power standby mode | Draws only ~1.3 mA supply current (typ) when CS = high - extends battery life in intermittent-sampling applications. |
Applications
| Industrial Process Monitoring | Remote Sensor Digitization |
|---|---|
|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors in factory automation PLCs. IC Role / Device Role / Timing Role: ADC08832IM digitizes analog outputs from 4–20 mA transducers and RTDs using single-ended or differential input modes. Use Value: Built-in MUX and track/hold allow direct connection to multiple sensors without external multiplexing ICs or op-amp buffers. |
Use Scenario: Battery-powered environmental nodes measuring humidity, light, and air quality in distributed IoT deployments. IC Role / Device Role / Timing Role: ADC08832IM performs low-duty-cycle conversions triggered by microcontroller, then enters low-power mode between samples. Use Value: 3.0 mW standby power and 3-wire interface minimize system-level energy consumption and routing complexity. |
| Noise-Immune Transducer Interface | Embedded Microcontroller Data Acquisition |
|
Use Scenario: Reading bridge-based strain gauges or load cells in electrically noisy motor drive cabinets. IC Role / Device Role / Timing Role: ADC08832IM uses differential input mode to reject 60 Hz common-mode interference from adjacent AC lines. Use Value: Sub-μs sampling window and internal track/hold suppress common-mode drift during conversion, preserving 8-bit accuracy. |
Use Scenario: Adding analog sensing capability to resource-limited 8-bit microcontrollers lacking internal ADC or with insufficient channels. IC Role / Device Role / Timing Role: ADC08832IM connects directly to MCU GPIO pins via 3-wire serial link, requiring no additional address decoding logic. Use Value: Pin-compatible upgrade path from legacy ADC0832; same footprint and timing allows drop-in replacement without PCB revision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC08831IM | Separate VREF pin; supports external precision references; lower supply current (1.0 mA typ active); no MUX addressing required. | Better suited for absolute-accuracy applications (e.g., calibrated instrumentation) where VREF stability is critical. | Select ADC08831IM when reference independence and tighter DC specs outweigh the need for dual-channel flexibility. |
| ADS7822U | 12-bit resolution; SPI interface; higher sampling rate (200 ksps); separate REF IN/REF OUT pins; 2.7–5.25 V supply. | Targets higher-precision industrial sensing where 8-bit resolution is insufficient, but requires more complex layout and power management. | Choose ADS7822U when ENOB > 7.7 bits is mandatory and system can accommodate wider supply range and larger package. |
Compared with ADC08832IM, ADC08831IM offers reference flexibility at the cost of channel count, while ADS7822U delivers higher resolution and speed but increases design complexity and cost - making ADC08832IM optimal for cost-sensitive, space-constrained 8-bit dual-input systems.
Availability
ADC08832IM is available at Aetrix Electronics and suitable for industrial process monitoring, remote sensor digitization, noise-immune transducer interface, and embedded microcontroller data acquisition requiring stable component supply and long-term obsolescence support.
Supply support for ADC08832IM 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of heritage in precision data converters and industrial-grade ICs.
The ADC08832IM belongs to TI's legacy 8-bit serial ADC family designed for cost-effective, low-pin-count analog digitization in space- and power-constrained embedded systems - emphasizing simplicity, noise immunity, and drop-in compatibility with earlier generations.
FAQ
What is the reference voltage configuration of the ADC08832IM?
The ADC08832IM uses an internal reference derived directly from the VCC supply pin - no external reference connection is required or supported. This makes it ideal for ratiometric applications where the analog input scales with the system supply, but precludes use of precision external references. The ADC08832IM reference is fixed and non-adjustable, unlike the ADC08831IM which provides a dedicated VREF pin.
Does the ADC08832IM support differential input mode?
Yes, the ADC08832IM supports true differential input mode via software-configurable MUX addressing: users shift a 2-bit code (e.g., "00" or "01") after the start bit on the DI line to assign CH0 and CH1 as (+) and (−) inputs with selectable polarity. This enables rejection of common-mode noise and accurate measurement of floating or bipolar signals without external instrumentation amplifiers.
What is the maximum clock frequency and corresponding conversion time for the ADC08832IM?
The ADC08832IM supports a maximum clock frequency of 2 MHz. At this rate, the maximum conversion time is 4 μs - comprising MUX settling (½ clock period), 8-bit SAR comparison cycles, and output shifting. This yields a maximum sampling rate of 153 ksps, confirmed in the Dynamic Characteristics table under fCLK = 2 MHz conditions.
Can the ADC08832IM operate from a 3.3V supply?
No - the ADC08832IM is specified for 4.5 V to 6.0 V operation per its Absolute Maximum and Operating Ratings. Operation below 4.5 V violates datasheet specifications and may cause incorrect MUX addressing, incomplete conversions, or increased TUE. For 3.3V systems, consider newer alternatives like the ADS7822 or TLV2541, not the ADC08832IM.
Is the ADC08832IM pin-compatible with the older ADC0832?
Yes - the ADC08832IM maintains identical pinout, electrical timing, and functional behavior as the industry-standard ADC0832 in 8-pin SOIC/VSSOP packages. It is explicitly positioned as a "superior pin compatible replacement" in the datasheet, offering improved specs (e.g., ±1 LSB TUE vs ±2 LSB) and enhanced noise immunity without requiring PCB changes.
ADC08832IM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 2
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 4.5V ~ 6V
- Voltage - Supply, Digital:
- 4.5V ~ 6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC08832IM FAQ
1.How can I place an order for ADC08832IM through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC08832IM 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 ADC08832IM reliable?
The price and inventory of ADC08832IM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC08832IM is usually 5 days.
3.What payment methods are accepted for ADC08832IM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC08832IM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC08832IM?
ADC08832IM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC08832IM 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 ADC08832IM?
For technical support, including ADC08832IM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC08832IM requirements.
6.How does Aetrix verify that ADC08832IM is sourced from the original manufacturer or authorized distributors?
All ADC08832IM 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 ADC08832IM meets industry standards.
7.What is the process for return or replacement of ADC08832IM?
All ADC08832IM units undergo pre-shipment inspection (PSI). If there is an issue with ADC08832IM, 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 ADC08832IM part is unused and in its original packaging.
Return procedure for ADC08832IM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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