ADC08832IN/NOPB - 8-Bit SAR ADC, 2-Ch, 8-PDIP | Texas Instruments
MPN: ADC08832IN/NOPB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.1 | $310.00 |
| 500 | $2.71 | $1,355.00 |
| 1,000 | $2.39 | $2,390.00 |
ADC08832IN/NOPB Overview
An SAR ADC is a converter architecture that uses a binary-search algorithm against an internal DAC to resolve each conversion in a fixed number of clock cycles; it combines low latency with deterministic throughput and is the workhorse of mid-speed data acquisition where successive samples need to be tightly time-stamped. The ADC08832 extends that architecture with an integrated 2-channel analog multiplexer and an on-chip sample-and-hold, eliminating the need for an external analog front-end switch and reducing board space, BOM cost, and total error budget.
Key features include a serial NSC MICROWIRE-compatible digital interface that shares the bus with up to two additional ADC channels when cascaded, an industrial temperature grade of -40 °C to +85 °C, and a differential/single-ended input stage. Compared with parallel ADCs of the same era, the MICROWIRE serial interface reduces pin count and routes cleanly to modern microcontrollers, including MSP430 and Tiva C-Series devices.
Typical applications include portable instrumentation, process-control analog input modules, factory automation sensor interfaces, and consumer audio level meters. The serial interface makes it well suited to compact boards where PCB real estate is constrained.
When designing with this part, place the 0.1 µF supply-decoupling ceramic capacitor within 5 mm of the VCC pin and keep the analog input traces short and guarded with a ground plane. The through-hole PDIP package is preferred for breadboarding, hand-soldered prototypes, and legacy designs that still rely on through-hole assembly.
Drop-in alternatives for ADC08832IN/NOPB — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADC08832IN/NOPB (same form factor and footprint) — differing in Data Interface, Package, Sampling Rate.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC08831IN/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC08832IN/NOPB Maximum Ratings & Electrical Characteristics
| Number of Bits | 8 |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 2 (1 differential or 2 single-ended via internal MUX) |
| Sampling Rate | 153 ksps (typical) |
| Data Interface | NSC MICROWIRE serial (3-wire SPI-compatible) |
| Supply Voltage Range | 4.5 V to 6 V |
| Input Type | Single-ended / Pseudo-differential |
| On-chip Sample and Hold | Yes |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 8-PDIP (8-pin DIP, 0.300 inch / 7.62 mm row) |
| Terminal Form | Through-Hole |
| Number of Terminals | 8 |
| Temperature Grade | Industrial |
| RoHS Status | Compliant |
| Packaging | Tube |
ADC08832IN/NOPB Pin Configuration
| Pin 1 | VIN+ — Positive analog input (Channel 0) |
| Pin 2 | VIN- — Negative analog input (Channel 1 / MUX input) |
| Pin 3 | GND — Ground |
| Pin 4 | DOUT — Serial data output (MICROWIRE) |
| Pin 5 | CLK — Serial clock input |
| Pin 6 | CS — Chip select (active low) |
| Pin 7 | VREF — Voltage reference input |
| Pin 8 | VCC — Positive supply (4.5 V to 6 V) |
Typical Applications
ADC08832IN/NOPB is suitable for 6 applications: Portable Battery-Powered Instrumentation, Process Control Analog Input Module, Consumer Audio VU Meter / Level Display, Factory Automation Sensor Interface, Embedded Data Acquisition Node, Battery Monitoring Front-End.
Portable Battery-Powered Instrumentation
The ADC08832IN/NOPB is well matched to handheld multimeters, data loggers, and field instruments because it consumes only a few milliamps from a single 4.5 V to 6 V rail and runs at up to 153 ksps. Its 8-bit resolution is sufficient for display digits and trend logging, while the MICROWIRE interface lets a low-pin-count MSP430 host sample two sensors on one bus, reducing PCB area and BOM cost. The 8-PDIP package is also easy to hand-solder during prototype rework, accelerating field iterations.
Recommended
Process Control Analog Input Module
In PLC analog-input modules the ADC08832IN/NOPB digitizes two 4 mA to 20 mA current-loop signals or thermocouple voltages at 153 ksps with 8-bit resolution, meeting the throughput needs of typical 10 Hz process loops. Its integrated sample-and-hold removes the external analog front-end, reducing board space, while the industrial -40 °C to +85 °C temperature range guarantees correct operation inside enclosed cabinets. The MICROWIRE bus also allows multiple ADC08832 chips to be cascaded for higher channel counts without a parallel bus.
Recommended
Consumer Audio VU Meter / Level Display
The ADC08832IN/NOPB supports audio VU meters where two channel inputs are sampled at 153 ksps with 8-bit resolution, allowing LED-bar or LCD meter refresh in real time. Its 4.5 V to 6 V supply matches the rail feeding analog audio stages, minimizing regulator overhead. The MICROWIRE interface writes display values directly into an LED-driver shift register chain, simplifying PCB layout and lowering total system cost.
Recommended
Factory Automation Sensor Interface
In factory automation the ADC08832IN/NOPB digitizes outputs from two adjacent sensors such as photoelectric switches or proximity detectors at up to 153 ksps, providing 8-bit oversampled values for PLC input cards. Its 4.5 V to 6 V operation matches a common 5 V regulated bus and the wide -40 °C to +85 °C industrial range handles cabinet temperatures. The SAR architecture guarantees a fixed conversion latency, simplifying input-to-actuator timing budgets.
Recommended
Embedded Data Acquisition Node
The ADC08832IN/NOPB serves as the data-acquisition front-end in an embedded sensor node, where two analog channels are sampled at 153 ksps and forwarded through a MICROWIRE link to a host MCU running at 3.3 V or 5 V. Its 8-bit resolution is adequate for environmental or vibration trend data, while the small 8-PDIP footprint eases hand-solder rework and shortens prototype cycles. Industrial temperature rating ensures correct behavior in outdoor enclosures.
Recommended
Battery Monitoring Front-End
The ADC08832IN/NOPB monitors a battery stack's voltage and current at 153 ksps with 8-bit resolution, allowing a battery-management MCU to track state-of-charge with a single bus device. The 4.5 V to 6 V supply supports direct connection to a 5 V regulated rail, while the 8-PDIP package through-hole pins make it easy to swap during lab testing. The integrated sample-and-hold ensures accurate sampling of dynamic cell currents.
Recommended
Recommended Products Summary
Engineering reference data for ADC08832IN/NOPB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC08831IN/NOPB | ADC08832IM/NOPB | ADC08832IWM/NOPB |
|---|---|---|---|---|
| Package | 8-PDIP (through-hole) | 8-PDIP (same) | 8-SOIC (different footprint) | 16-SOIC (different footprint) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits |
| Number of Channels | 2 | 1 | 2 | 2 |
| Sampling Rate | 153 ksps | 153 ksps | 153 ksps | 153 ksps |
| Supply Voltage | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V |
| Interface | MICROWIRE (3-wire serial) | MICROWIRE (3-wire serial) | MICROWIRE (3-wire serial) | MICROWIRE (3-wire serial) |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
Key Differentiators
- Through-hole PDIP form factor ideal for prototyping (vs ADC08832IM/NOPB (SOIC-8))
- Two single-ended channels from one ADC core (vs ADC08831IN/NOPB (single channel))
- Industrial temperature grade supported (vs Commercial-grade competitor equivalents (e.g. consumer DSP ADC companions))
Design Notes
Place a 0.1 µF ceramic bypass capacitor within 5 mm of the VCC pin (pin 8) and a 10 µF tantalum bulk capacitor at the regulator output. The MICROWIRE digital lines carry fast edges that can couple into the analog VCC node if the bypass is not close to the supply pin, so keep the analog VCC trace short and the decoupling pad on the same side of the package. A separate analog-only 5 V rail, isolated from the digital MCU supply by a ferrite bead, improves spurious-free dynamic range.
Route analog inputs and reference traces over a continuous ground plane on the top layer, keeping them away from digital clock lines and DOUT edges. Place the part with pin 1 (VIN+) facing the analog source so its trace is short. Avoid running input traces parallel to the CLK trace for more than a few millimeters to minimize capacitive coupling.
Ensure CS is held high between conversions to keep the serial output in high-Z state and prevent bus contention with another MICROWIRE device on the same bus. Do not apply a clock to the ADC without a valid CS framing sequence, as it may corrupt the conversion register. Finally, leave the unused analog input grounded through 1 kΩ if used in single-ended mode to avoid spurious MUX toggling.
Compliance Information
RoHS compliance confirmed via TI/NOPB part marking. No AEC-Q100 grade (industrial temperature only).
