Specifications
| Type | Description |
|---|---|
| Part Number | ADS122U04 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Other |
| Package / Case | 16-pin WQFN (RTE), 3.00 mm x 3.00 mm; 16-pin TSSOP (PW), 5.00 mm x 4.40 mm |
| Resolution | 24-bit; ADC architecture |
| Input Channels | 2 differential or 4 single-ended; flexible input multiplexer |
| Maximum Data Rate | 2000 SPS; programmable data rate |
| Effective Resolution | Up to 20 bits; device feature |
| Current Consumption | 315 uA typ; low-current operation |
| Supply Voltage Range | 2.3 V to 5.5 V; wide supply range |
| Programmable Gain | 1 to 128; internal PGA |
| Digital Filter Rejection | Simultaneous 50-Hz and 60-Hz rejection; 20 SPS, single-cycle settling digital filter |
| Excitation Current Sources | Dual matched programmable current sources, 10 uA to 1.5 mA; integrated current sources |
| Internal Reference Voltage | 2.048 V; integrated voltage reference |
| Internal Reference Drift | 5 ppm/°C typ; internal 2.048-V reference |
| Internal Oscillator Accuracy | 2%; integrated oscillator |
| Internal Temperature Sensor Accuracy | 0.5°C typ; integrated temperature sensor |
| GPIO Count | 3; general-purpose inputs/outputs |
| Digital Interface | 2-wire UART-compatible interface, 8-N-1 format; serial communication interface |
| Maximum UART Baud Rate | Up to 120 kBaud; UART-compatible interface with auto-baud-rate detection |
| Operating Ambient Temperature | -40°C to +125°C; specified operating temperature range |
| Absolute Maximum Analog Supply Voltage | -0.3 V min, 7 V max; AVDD to AVSS |
| Absolute Maximum Digital Supply Voltage | -0.3 V min, 7 V max; DVDD to DGND |
| Absolute Maximum AVSS to DGND Voltage | -2.8 V min, 0.3 V max; AVSS to DGND |
| Absolute Maximum Analog Input Voltage | AVSS - 0.3 V min, AVDD + 0.3 V max; AIN0, AIN1, AIN2, AIN3, REFP, REFN |
| Absolute Maximum Digital Input Voltage | DGND - 0.3 V min, DVDD + 0.3 V max; TX, RX, GPIO0, GPIO1, GPIO2/DRDY, RESET |
| Absolute Maximum Input Current | -10 mA min, 10 mA max; continuous, any pin except power-supply pins |
| Maximum Junction Temperature | 150°C; absolute maximum rating, TJ |
| Storage Temperature | -60°C min, 150°C max; absolute maximum rating, Tstg |
| ESD Rating HBM | ±2000 V; human-body model per ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±750 V; charged-device model per JEDEC JESD22-C101 |
| Recommended Unipolar Analog Supply | 2.3 V min, 5.5 V max; AVDD to AVSS |
| Recommended AVSS to DGND Voltage | -0.1 V min, 0 V nom, 0.1 V max; unipolar analog power supply |
| Recommended Bipolar AVDD to DGND Voltage | 2.3 V min, 2.5 V nom, 2.75 V max; bipolar analog power supply |
| Recommended Bipolar AVSS to DGND Voltage | -2.75 V min, -2.5 V nom, -2.3 V max; bipolar analog power supply |
| Recommended Digital Supply | 2.3 V min, 5.5 V max; DVDD to DGND |
| Analog Input Absolute Voltage, PGA Disabled | AVSS - 0.1 V min, AVDD + 0.1 V max; gain = 1 to 4 |
| Analog Input Absolute Voltage, PGA Enabled | AVSS + 0.2 V min, AVDD - 0.2 V max; gain = 1 to 4 |
| Differential Input Voltage | -VREF/Gain min, VREF/Gain max; VIN = VAINP - VAINN |
| Differential Reference Input Voltage | 0.75 V min, 2.5 V nom, AVDD - AVSS max; VREF = V(REFP) - V(REFN) |
| Absolute Negative Reference Voltage | AVSS - 0.1 V min, V(REFP) - 0.75 V max; V(REFN) |
| Absolute Positive Reference Voltage | V(REFN) + 0.75 V min, AVDD + 0.1 V max; V(REFP) |
| Digital Input Voltage | DGND min, DVDD max; RX, GPIO0, GPIO1, GPIO2/DRDY, RESET |
| Junction-to-Ambient Thermal Resistance, WQFN | 57.7°C/W; WQFN RTE, 16 pins |
| Junction-to-Ambient Thermal Resistance, TSSOP | 90.3°C/W; TSSOP PW, 16 pins |
| Absolute Input Current, PGA Disabled Normal Mode | ±5 nA typ; gain = 1 to 4, VIN = 0 V |
| Absolute Input Current, PGA Disabled Turbo Mode | ±10 nA typ; gain = 1 to 4, VIN = 0 V |
| Absolute Input Current, Gain 1 to 128 | ±1 nA typ; VIN = 0 V |
| Absolute Input Current Drift, PGA Disabled | 10 pA/°C typ; gain = 1 to 4, VIN = 0 V |
| Absolute Input Current Drift, Gain 1 to 128 | 5 pA/°C typ; VIN = 0 V |
| Differential Input Current, PGA Disabled Normal Mode | ±5 nA typ; gain = 1 to 4, VCM = AVDD/2, -VREF/Gain <= VIN <= VREF/Gain |
| Differential Input Current, PGA Disabled Turbo Mode | ±10 nA typ; gain = 1 to 4, VCM = AVDD/2, -VREF/Gain <= VIN <= VREF/Gain |
| Differential Input Current, Gain 1 to 128 | ±1 nA typ; gain = 1 to 128 |
| Datasheet Status | request_only |
Product Overview
The ADS122U04 is a Texas Instruments 24-bit delta-sigma ADC for Signal_Chain designs requiring configurable low-level measurement. Its flexible input multiplexer supports 2 differential or 4 single-ended inputs, while the internal PGA provides programmable gain from 1 to 128. The device supports programmable data rates up to 2000 SPS and effective resolution up to 20 bits.
Integrated analog functions include a 2.048 V reference with 5 ppm/°C typical drift, dual matched programmable excitation current sources from 10 uA to 1.5 mA, an internal oscillator with 2% accuracy, and an internal temperature sensor with 0.5°C typical accuracy. Digital communication uses a 2-wire UART-compatible interface in 8-N-1 format, with auto-baud-rate detection up to 120 kBaud.
Package options are 16-pin WQFN (RTE), 3.00 mm x 3.00 mm, and 16-pin TSSOP (PW), 5.00 mm x 4.40 mm. Recommended supplies include 2.3 V to 5.5 V analog and digital rails, with operation specified across -40°C to +125°C ambient temperature.
Key Features
- 24-bit delta-sigma ADC architecture
- 2 differential or 4 single-ended input channels
- Programmable data rates up to 2000 SPS
- Effective resolution up to 20 bits
- Internal PGA gain range from 1 to 128
- 315 uA typical low-current operation
- 2.3 V to 5.5 V supply range
- 2.048 V internal reference, 5 ppm/°C drift
- Dual programmable excitation current sources, 10 uA to 1.5 mA
- 2-wire UART-compatible interface, 8-N-1 format
- Three general-purpose input/output pins
- -40°C to +125°C operating ambient range
Typical Applications
- Differential sensor signal measurement
- Single-ended analog signal acquisition
- Low-current data acquisition modules
- UART-connected measurement nodes
- Bridge or resistive sensor excitation
- Temperature-aware measurement systems
- 50-Hz and 60-Hz rejected conversions
Procurement Notes
When requesting a quote for ADS122U04, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What resolution does the ADS122U04 ADC provide?
The ADS122U04 uses a 24-bit delta-sigma ADC architecture. The extracted device features also specify effective resolution up to 20 bits, depending on operating configuration and measurement conditions.
How many analog inputs are available on ADS122U04?
The flexible input multiplexer supports either 2 differential input channels or 4 single-ended input channels. The analog input pins listed in the extracted limits are AIN0, AIN1, AIN2, and AIN3.
What communication interface does ADS122U04 use?
ADS122U04 uses a 2-wire UART-compatible serial interface in 8-N-1 format. The interface supports auto-baud-rate detection and operates at baud rates up to 120 kBaud.
What package options are specified for ADS122U04?
The specified package options are 16-pin WQFN (RTE), measuring 3.00 mm x 3.00 mm, and 16-pin TSSOP (PW), measuring 5.00 mm x 4.40 mm.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.