Specifications
| Type | Description |
|---|---|
| Part Number | ADS7828 |
| Manufacturer | Texas Instruments |
| Product Type | ADC |
| Category | Signal Chain |
| Package / Case | TSSOP-16, package-lead designator PW |
| Resolution | 12 bit; no missing codes |
| Input Channels | 8 channels; 8-channel multiplexer, CH0-CH7 |
| Interface | I2C serial 2-wire; supports Standard, Fast, and High-Speed modes |
| Maximum Sampling Rate | 50 kHz; High-Speed Mode, SCL=3.4 MHz |
| Throughput Frequency | 8 kHz; Fast Mode, SCL=400 kHz |
| Throughput Frequency | 2 kHz; Standard Mode, SCL=100 kHz |
| Conversion Time | 6 us; TA=-40°C to +85°C |
| Supply Voltage Range | 2.7-3.6 V; specified performance at +2.7 V operating condition |
| Supply Voltage Range | 4.75-5.25 V; specified performance at +5 V operating condition |
| Operating Temperature Range | -40°C to +85°C; specified performance |
| Absolute Maximum Supply Voltage | -0.3 V to +6 V; +VDD to GND |
| Digital Input Absolute Maximum Voltage | -0.3 V to +VDD + 0.3 V; digital input voltage to GND |
| Storage Temperature Range | -65°C to +150°C; absolute maximum ratings |
| Junction Temperature Maximum | +150°C; TJ max |
| Package Thermal Impedance | 240°C/W; TSSOP package, theta JA |
| Full-scale Input Range | 0 to VREF; positive input minus negative input |
| Positive Analog Input Absolute Range | -0.2 V to +VDD + 0.2 V; analog input, positive input |
| Negative Analog Input Absolute Range | -0.2 V to +0.2 V; analog input, negative input |
| Analog Input Capacitance | 25 pF typ; TA=-40°C to +85°C |
| Analog Input Leakage Current | ±1 uA max; TA=-40°C to +85°C |
| Integral Linearity Error | ±1.0 LSB typ, ±2 LSB max; ADS7828E, VDD=2.7 V, VREF=2.5 V |
| Integral Linearity Error | ±0.5 LSB typ, ±1 LSB max; ADS7828EB, VDD=2.7 V, VREF=2.5 V |
| Differential Linearity Error | ±1.0 LSB typ; ADS7828E, VDD=2.7 V, VREF=2.5 V |
| Differential Linearity Error | ±0.5 LSB typ, -1/+2 LSB max; ADS7828EB, VDD=2.7 V, VREF=2.5 V |
| Offset Error | ±1.0 LSB typ, ±3 LSB max; ADS7828E, VDD=2.7 V, VREF=2.5 V |
| Gain Error | ±1.0 LSB typ, ±4 LSB max; ADS7828E, VDD=2.7 V, VREF=2.5 V |
| Noise | 33 uVRMS typ; VDD=2.7 V or 5 V |
| Power-supply Rejection | 82 dB typ; VDD=2.7 V or 5 V |
| Total Harmonic Distortion | -82 dB typ; VIN=2.5 VPP at 10 kHz, measured to 9th harmonic |
| Signal-to-noise Ratio | 72 dB typ; VIN=2.5 VPP at 10 kHz |
| Signal-to-noise-plus-distortion Ratio | 71 dB typ; VIN=2.5 VPP at 10 kHz |
| Spurious-free Dynamic Range | 86 dB typ; VIN=2.5 VPP at 10 kHz |
| Channel-to-channel Isolation | 120 dB typ; isolation specification |
| Internal Reference Voltage | 2.475 V min, 2.5 V typ, 2.525 V max; voltage reference output range |
| Internal Reference Drift | 15 ppm/°C typ; voltage reference output |
| Reference Output Impedance | 110 ohm typ; internal reference ON |
| Reference Output Impedance | 1 Gohm typ; internal reference OFF |
| External Reference Input Range | 0.05 V to VDD; voltage reference input |
| Reference Input Resistance | 1 Gohm typ; voltage reference input |
| Reference Input Current Drain | 20 uA typ; High-Speed Mode, SCL=3.4 MHz |
| Digital Logic Family | CMOS; digital input/output |
| Logic High Input Voltage | 0.7*VDD min to VDD+0.5 V max; VIH |
| Logic Low Input Voltage | -0.3 V min to 0.3*VDD max; VIL |
| Output Low Voltage | 0.4 V max; VOL, 3 mA sink current |
| Input High Leakage Current | 10 uA max; VIH=VDD+0.5 V |
| Input Low Leakage Current | -10 uA max; VIL=-0.3 V |
| Output Data Format | Straight binary; digital output data format |
| Hardware Address Prefix | 10010 binary; ADS7828 hardware address |
| Quiescent Current | 225 uA typ, 320 uA max; VDD=2.7 V, High-Speed Mode, SCL=3.4 MHz |
| Quiescent Current | 100 uA typ; VDD=2.7 V, Fast Mode, SCL=400 kHz |
| Quiescent Current | 60 uA typ; VDD=2.7 V, Standard Mode, SCL=100 kHz |
| Quiescent Current | 750 uA typ, 1000 uA max; VDD=5 V, High-Speed Mode, SCL=3.4 MHz |
| Power Dissipation | 675 uW typ, 1000 uW max; VDD=2.7 V, High-Speed Mode, SCL=3.4 MHz |
| Power Dissipation | 3.75 mW typ, 5 mW max; VDD=5 V, High-Speed Mode, SCL=3.4 MHz |
| Full Power-down Current | 400 nA typ, 3000 nA max; SCL pulled HIGH, SDA pulled HIGH |
| SCL Clock Frequency | 100 kHz max; Standard Mode |
| SCL Clock Frequency | 400 kHz max; Fast Mode |
| SCL Clock Frequency | 3.4 MHz max; High-Speed Mode, CB=100 pF max |
| SCL Clock Frequency | 1.7 MHz max; High-Speed Mode, CB=400 pF max |
| SDA/SCL Capacitive Load | 400 pF max; bus line capacitive load |
| I2C Data Setup Time | 250 ns min; Standard Mode |
| I2C Data Setup Time | 100 ns min; Fast Mode |
| I2C Data Setup Time | 10 ns min; High-Speed Mode |
| Datasheet Status | request_only |
Product Overview
The ADS7828 is a Texas Instruments ADC converter described as a 12-bit 8-channel I2C ADC. Its input structure includes an 8-channel multiplexer covering CH0 through CH7, with a full-scale input range from 0 to VREF for positive input minus negative input. Output data is provided in straight binary format over an I2C serial 2-wire interface.
The device supports Standard, Fast, and High-Speed I2C modes. Throughput is specified at 2 kHz for Standard Mode with SCL at 100 kHz, 8 kHz for Fast Mode with SCL at 400 kHz, and up to 50 kHz in High-Speed Mode with SCL at 3.4 MHz. Conversion time is specified as 6 us across -40°C to +85°C.
ADS7828 is offered in a TSSOP-16 package with PW package-lead designator. Specified supply operation covers 2.7 V to 3.6 V and 4.75 V to 5.25 V conditions, with absolute maximum +VDD to GND from -0.3 V to +6 V. It includes a 2.5 V typical internal reference and also accepts an external reference input from 0.05 V to VDD.
Key Features
- 12-bit resolution with no missing codes
- Eight-channel multiplexer covering CH0 through CH7
- I2C serial 2-wire interface with three speed modes
- 50 kHz sampling in High-Speed Mode
- 6 us conversion time across specified temperature range
- 2.7-3.6 V and 4.75-5.25 V specified supplies
- Internal 2.5 V typical reference output
- External reference input range from 0.05 V to VDD
- Straight binary digital output data format
- Full power-down current of 400 nA typical
Typical Applications
- Multichannel data acquisition
- I2C-based analog monitoring
- Low-power measurement nodes
- Sensor signal digitization
- Reference-based voltage measurement
- CMOS logic control systems
- Temperature-range instrumentation
- TSSOP-16 board assemblies
Procurement Notes
When requesting a quote for ADS7828, 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 type of converter is the ADS7828?
The ADS7828 is a Texas Instruments 12-bit 8-channel I2C ADC in the Signal_Chain category. It includes an 8-channel multiplexer for CH0 through CH7 and provides straight binary digital output data.
What I2C operating modes does ADS7828 support?
ADS7828 supports Standard, Fast, and High-Speed I2C serial 2-wire modes. The listed SCL limits are 100 kHz for Standard Mode, 400 kHz for Fast Mode, and 3.4 MHz in High-Speed Mode with 100 pF bus capacitance.
What sampling and throughput rates are specified?
The maximum sampling rate is 50 kHz in High-Speed Mode with SCL at 3.4 MHz. Throughput is also specified as 8 kHz in Fast Mode at 400 kHz SCL and 2 kHz in Standard Mode at 100 kHz SCL.
What supply ranges are specified for the ADS7828?
Specified performance is listed for 2.7 V to 3.6 V at the +2.7 V operating condition and 4.75 V to 5.25 V at the +5 V operating condition. The absolute maximum +VDD to GND range is -0.3 V to +6 V.
What reference options are listed for ADS7828?
The internal reference output is specified at 2.475 V minimum, 2.5 V typical, and 2.525 V maximum, with 15 ppm/°C typical drift. An external reference input range from 0.05 V to VDD is also specified.
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.