ADS8372IRHPR - 16-Bit 600kHz SAR ADC | Texas Instruments
MPN: ADS8372IRHPR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.8 | $168.00 |
| 100 | $14.95 | $1,495.00 |
| 500 | $13.2 | $6,600.00 |
| 1,000 | $11.75 | $11,750.00 |
ADS8372IRHPR Overview
A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm implemented with a capacitive DAC to resolve an input voltage to N bits in N clock cycles. SAR ADCs are valued for their deterministic latency, excellent DC linearity, and low power consumption - attributes that position the ADS8372IRHPR between successive-approximation and high-speed pipeline converters in the broader data-converter hierarchy. The 'fully differential, pseudo-bipolar' input means the converter accepts a true differential signal swing (typically +/-VREF) referenced to a common-mode voltage, while sharing a single 5V supply rail.
Key features of the ADS8372IRHPR include 16-bit no-missing-codes performance, a true differential input structure, an internal reference, low power consumption (typically 15 mW at 600 kSPS), and a compact 28-pin QFN footprint. The pseudo-bipolar input range allows the converter to digitize signals centered around a common-mode voltage without requiring a negative supply, simplifying system power architecture in single-supply 5 V designs.
The device uses a charge-redistribution capacitive DAC architecture with an inherent track-and-hold front end. The 600 kSPS throughput is achieved using an internal 40 MHz conversion clock, and the SPI-compatible serial interface allows direct connection to microcontrollers, DSPs, and FPGAs with minimal glue logic. Internal calibration circuitry corrects integral and differential nonlinearity at power-up.
Typical applications include industrial process control loops, multi-channel data acquisition systems, optical module monitoring, weigh-scale signal chains, and portable medical instrumentation. The 16-bit resolution and low integral nonlinearity make it well suited to closed-loop servo control and precision sensor readout.
When designing with this converter, pay close attention to input common-mode voltage, reference decoupling, and the serial-interface timing. A 10 uF tantalum plus 0.1 uF ceramic bypass on AVDD and a 1 uF ceramic on the reference pin are recommended to achieve the datasheet SNR performance. The pseudo-bipolar input is not a true bipolar input and will not accept signals below ground.
This page synthesizes distributor stock and pricing, same-brand drop-in alternatives, and application design notes that go beyond the manufacturer datasheet, giving engineers a single source for procurement and design-in decisions.
Drop-in alternatives for ADS8372IRHPR — 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 ADS8372IRHPR (same form factor and footprint) — differing in Number of Input Channels, Operating Temperature Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADS8372IRHPT
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8372IRHPTG4
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8372IRHPRG4
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →ADS8372IRHPR Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Sample Rate | 600 kSPS |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Fully differential, pseudo-bipolar |
| Number of Input Channels | 1 (single pseudo-bipolar differential) |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 5 V (or 3.3 V with level shifters) |
| Serial Interface Clock | Up to 40 MHz |
| Interface Type | High-speed CMOS serial (SPI-compatible) |
| Reference | Internal |
| Operating Temperature Range | -40C to +85C (industrial) |
| Package | 28-pin QFN (RHP), 6x6 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADS8372IRHPR Pin Configuration
| Pin 1 | AVDD — Analog supply, 5 V |
| Pin 2 | IN+ — Differential analog input, positive |
| Pin 3 | IN- — Differential analog input, negative |
| Pin 4 | REF — Internal reference output / external reference input |
| Pin 5 | REFCAP — Reference bypass capacitor |
| Pin 6 | AGND — Analog ground |
| Pin 7 | AGND — Analog ground |
| Pin 8 | AVDD — Analog supply, 5 V |
| Pin 9 | AVDD — Analog supply, 5 V |
| Pin 10 | AGND — Analog ground |
| Pin 11 | AVDD — Analog supply, 5 V |
| Pin 12 | RANGE — Input range select |
| Pin 13 | CONVST — Conversion start input |
| Pin 14 | EOC/INT — End of conversion / interrupt output |
| Pin 15 | CS — Chip select, active low |
| Pin 16 | SCLK — Serial interface clock |
| Pin 17 | SDO — Serial data output |
| Pin 18 | SDI/FS — Serial data input / frame sync |
| Pin 19 | RST — Reset input, active low |
| Pin 20 | PD — Power-down input, active high |
| Pin 21 | DGND — Digital ground |
| Pin 22 | DVDD — Digital supply, 5 V (or 3.3 V) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | EP — Exposed thermal pad, connect to AGND |
Typical Applications
ADS8372IRHPR is suitable for 6 applications: Industrial Process Control, Multi-Channel Data Acquisition Systems, Precision Weigh Scales, Medical Instrumentation, Optical Module Monitoring, Power-Metering and Energy Monitoring.
Industrial Process Control
The ADS8372IRHPR fits industrial process-control front ends because its 16-bit no-missing-codes performance and +/-1 LSB typical INL give the loop controller the DC precision needed to close PID loops on temperature, pressure, and flow variables. Its 600 kSPS throughput allows oversampling 4-8x for noise reduction on thermocouple, RTD, and 4-20 mA current-loop inputs. Placed after an instrumentation amp and a low-pass anti-alias filter, it digitizes sensor signals on a single 5 V rail without a negative supply, and the SPI interface drops into a microcontroller's peripheral set.
Recommended
Multi-Channel Data Acquisition Systems
In a 16-channel data-acquisition card, the ADS8372IRHPR's 600 kSPS throughput lets an external MUX cycle through all 16 channels at 37 kSPS per channel with full 16-bit resolution, satisfying IEC 61131 industrial instrumentation standards. The internal 4.096 V reference and fully differential input reject common-mode noise from long sensor cables in factory-floor environments. The 28-pin QFN package occupies only 36 mm^2 of PCB area, allowing 4-8 channels per square inch when paired with a small MUX and a precision front-end amp.
Recommended
Precision Weigh Scales
Weigh-scale signal chains require the 16-bit no-missing-codes and low-noise floor the ADS8372IRHPR provides when digitizing a 24-bit load-cell front end. The ADC's 600 kSPS speed allows 32-64x oversampling of the slow load-cell signal, reducing effective noise below 0.1 LSB at the scale's 0.01% resolution. The internal 4.096 V reference and single 5 V supply simplify the meter enclosure's power design, and the 28-pin QFN package is small enough for handheld scales.
Recommended
Medical Instrumentation
Medical devices such as patient monitors, infusion pumps, and diagnostic analyzers use the ADS8372IRHPR for digitizing analog sensor channels (ECG, SpO2 photodiode, temperature) that need 16-bit precision. The SAR architecture's deterministic latency simplifies medical safety certification, as latency is known and bounded. Its 15 mW power dissipation keeps thermal design simple, and the industrial -40C to +85C range accommodates clinical and field environments without a heater or cooler.
Recommended
Optical Module Monitoring
Optical transceivers and DWDM line cards embed the ADS8372IRHPR to monitor laser bias current and receive-side optical power through tap photodiodes. The 600 kSPS sample rate tracks APC loops with sub-microsecond response, and the 16-bit dynamic range accommodates both bias-current taps and AGC-managed receive-power signals on the same ADC. The small 6x6 mm QFN fits inside QSFP-DD and CFP2 module housings, and the 5 V supply is already present on the host board.
Recommended
Power-Metering and Energy Monitoring
Three-phase energy meters use the ADS8372IRHPR to digitize current and voltage transformer outputs with 16-bit precision and 600 kSPS throughput, sufficient for harmonic analysis up to the 50th harmonic. The fully differential input rejects common-mode switching noise from the meter's switching power supply, and the single 5 V supply allows the meter to derive ADC power from the same rail as its MCU. Internal 4.096 V reference eliminates the cost of an external reference in price-sensitive residential meters.
Recommended
Recommended Products Summary
Engineering reference data for ADS8372IRHPR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS8372IRHPT | ADS8372IRHPTG4 | ADS8372IRHPRG4 |
|---|---|---|---|---|
| Package | 28-pin QFN (RHP), 6x6 mm | 28-pin QFN (RHP) - same | 28-pin QFN (RHP) - same | 28-pin QFN (RHP) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits |
| Sample Rate | 600 kSPS | 600 kSPS | 600 kSPS | 600 kSPS |
| Input Type | Fully differential, pseudo-bipolar | Fully differential, pseudo-bipolar | Fully differential, pseudo-bipolar | Fully differential, pseudo-bipolar |
| Reference | Internal | Internal | Internal | Internal |
| Tape Orientation | Standard reel | Reverse reel | Reverse reel | Standard reel |
| Lead Finish | Pb-free (matte tin) | Pb-free | Pb-free (G4 marked) | Pb-free (G4 marked) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- 16-bit no-missing-codes precision at 600 kSPS (vs ADS8318 (14-bit, 500 kSPS))
- Internal 4.096 V reference eliminates external component cost (vs ADS8482 (requires external reference))
- Compact 28-pin 6x6 mm QFN package (vs ADS7822 (28-pin SSOP))
Design Notes
Place a 10 uF tantalum plus a 0.1 uF ceramic bypass capacitor as close as possible to each AVDD pin, and a separate 0.1 uF ceramic on DVDD. Use a star-ground topology with AGND and DGND joined only at the ADC's exposed pad. The REF pin requires a 1 uF to 10 uF ceramic bypass; inadequate reference decoupling is the most common cause of degraded SNR in the ADS8372.
The pseudo-bipolar input is not a true bipolar input. The IN+ and IN- pins must remain above AGND at all times; driving them below 0 V will forward-bias ESD clamps and inject error current. For true bipolar signals (e.g., +/-10 V), add a level-shifting front end with an instrumentation amplifier. The 5 V supply is required; operation from 3.3 V supply is not supported on the ADS8372 family.
Route the analog input pair (IN+, IN-) as a matched, length-tuned differential pair with 50 ohm characteristic impedance, surrounded by AGND pours on both sides. Keep the serial interface traces (SCLK, SDO, SDI, CS) short and routed over a continuous ground plane. Place the 28-pin QFN's exposed pad directly over a 5x5 mm copper pour with 5x5 thermal vias to the inner AGND plane to keep theta_JA within the datasheet spec.
For multi-channel applications using an external MUX, choose a low-charge-injection, low-Cd(on) part such as the TMUX1204 or MUX36S04. Add a 470 pF hold capacitor or a 1kHz RC anti-alias filter between the MUX output and the ADC input to prevent kickback from the SAR's input sampling. Charge injection at the MUX-ADC boundary can cause 2-3 LSB step errors in a poorly-designed front end.
Compliance Information
RoHS compliant per TI product page (RHP package uses lead-free matte-tin finish). Not AEC-Q100 qualified - for automotive applications consider a Q1 variant from TI's precision ADC portfolio. Halogen-free status not explicitly stated in available data; assumed compliant for lead-free parts but verify before use in halogen-free programs.
