ADS1256IDBT
Very Low Noise, 24-Bit Analog-to-Digital Converter
The ADS1256IDBT is an electronic component from Texas Instruments. Very Low Noise, 24-Bit Analog-to-Digital Converter. View the full ADS1256IDBT datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
ADC / DACKey Specifications
| Parameter | Value |
|---|---|
| Packaging | MouseReel |
| Standard Pack Qty | 250 |
Overview
Part: Texas Instruments ADS1255, ADS1256
Type: 24-Bit Analog-to-Digital Converter
Key Specs:
- Resolution: 24 Bits
- Noise-Free Resolution: Up to 23 Bits
- Nonlinearity: ±0.0010% (max)
- Data Output Rate: Up to 30kSPS
- Analog Supply: 5V
- Digital Supply: 1.8V to 3.6V
- Power Dissipation (Normal Mode): As low as 38mW
- Power Dissipation (Standby Mode): 0.4mW
- PGA Input-Referred Noise: 27nV
Features:
- 24 Bits, No Missing Codes - All Data Rates and PGA Settings
- Up to 23 Bits Noise-Free Resolution
- ±0.0010% Nonlinearity (max)
- Data Output Rates to 30kSPS
- Fast Channel Cycling
- One-Shot Conversions with Single-Cycle Settling
- Flexible Input Multiplexer with Sensor Detect
- Four Differential Inputs (ADS1256 only)
- Eight Single-Ended Inputs (ADS1256 only)
- Chopper-Stabilized Input Buffer
- Low-Noise PGA: 27nV Input-Referred Noise
- Self and System Calibration for All PGA Settings
- 5V Tolerant SPI™-Compatible Serial Interface
- Analog Supply: 5V
- Digital Supply: 1.8V to 3.6V
- Power Dissipation: As Low as 38mW in Normal Mode, 0.4mW in Standby Mode
Applications:
- Scientific Instrumentation
- Industrial Process Control
- Medical Equipment
- Test and Measurement
- Weigh Scales
Package:
- SSOP-20 (ADS1255)
- SSOP-28 (ADS1256)
Features
-
- 24 Bits, No Missing Codes - All Data Rates and PGA Settings
- -Up to 23 Bits Noise-Free Resolution
- -±0.0010% Nonlinearity (max)
- -Data Output Rates to 30kSPS
-
- Fast Channel Cycling
- - 18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHz
- Fast Channel Cycling
-
- One-Shot Conversions with Single-Cycle Settling
-
- Flexible Input Multiplexer with Sensor Detect
- - Four Differential Inputs (ADS1256 only) - Eight Single-Ended Inputs (ADS1256 only)
- Flexible Input Multiplexer with Sensor Detect
- -Chopper-Stabilized Input Buffer
- -Low-Noise PGA: 27nV Input-Referred Noise
-
- Self and System Calibration for All PGA Settings
- -5V Tolerant SPI™-Compatible Serial Interface
- -Analog Supply: 5V
- -Digital Supply: 1.8V to 3.6V
-
- Power Dissipation
- - As Low as 38mW in Normal Mode
- - 0.4mW in Standby Mode
- Power Dissipation
Applications
- -Scientific Instrumentation
- -Industrial Process Control
- -Medical Equipment
- -Test and Measurement
- -Weigh Scales
XTAL2 Serial Interface Mux and Sensor Detect Programmable Digital Filter 4th-Order Modulator ADS1256 Only ADS1256 Only Buffer 1:64 AGND D3 D2 D1 D0/CLKOUT DGND AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 AINCOM XTAL1/CLKIN RESET DRDY SCLK DIN SYNC/PDWN CS DOUT Control General Purpose Digital I/O Clock Generator PGA
VREFP VREFN
AVDD DVDD
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SPI is a trademark of Motorola, Inc. All other trademarks are the property of their respective owners.
Pin Configuration
Electrical Characteristics
All specifications at -40°C to +85°C, AVDD = +5V, DVDD = +1.8V, fCLKIN = 7.68MHz, PGA = 1, and VREF = +2.5V, unless otherwise noted.
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| Analog Inputs | |||||
| Full-scale input voltage (AINP - AINN) | ±2VREF/PGA | ||||
| Absolute input voltage | Buffer off | AGND - 0.1 | AVDD + 0.1 | V | |
| (AIN0-7, AINCOM to AGND) | Buffer on | AGND | AVDD - 2.0 | V | |
| Programmable gain amplifier | 1 | 64 | |||
| Differential input impedance | Buffer off, PGA = 1, 2, 4, 8, 16 | 150/PGA | kΩ | ||
| Buffer off, PGA = 32, 64 | 4.7 | kΩ | |||
| Buffer on, fDATA ≤ 50Hz(1) | 80 | MΩ | |||
| SDCS[1:0] = 01 | 0.5 | μA | |||
| Sensor detect current sources | SDCS[1:0] = 10 | 2 | μA | ||
| SDCS[1:0] = 11 | 10 | μA | |||
| System Performance | |||||
| Resolution | 24 | Bit | |||
| No missing codes | All data rates and PGA settings | 24 | Bit | ||
| Data rate (fDATA) | fCLKIN = 7.68MHz | 2.5 | 30,000 | SPS(2) | |
| Differential input, PGA = 1 | ±0.0003 | ±0.0010 | %FSR(3) | ||
| Integral nonlinearity | Differential input, PGA = 64 | ±0.0007 | %FSR | ||
| Offset error | After calibration | On the level of the noise | |||
| PGA = 1 | ±100 | nV/°C | |||
| Offset drift | PGA = 64 | ±4 | nV/°C | ||
| After calibration, PGA = 1, Buffer on | ±0.005 | % | |||
| Gain error | After calibration, PGA = 64, Buffer on | ±0.03 | % | ||
| PGA = 1 | ±0.8 | ppm/°C | |||
| Gain drift | PGA = 64 | ±0.8 | ppm/°C | ||
| Common-mode rejection | fCM(4) = 60Hz, fDATA = 30kSPS(5) | 95 | 110 | dB | |
| Noise | See Noise Performance Tables | ||||
| AVDD power-supply rejection | ±5% Δ in AVDD | 60 | 70 | dB | |
| DVDD power-supply rejection | ±10% Δ in DVDD | 100 | dB | ||
| Voltage Reference Inputs | |||||
| Reference input voltage (VREF) | VREF ≡ VREFP - VREFN | 0.5 | 2.5 | 2.6 | V |
| Negative reference input (VREFN) | Buffer off | AGND - 0.1 | VREFP - 0.5 | V | |
| Buffer on(6) | AGND | VREFP - 0.5 | V | ||
| Positive reference input (VREFP) | Buffer off | VREFN + 0.5 | AVDD + 0.1 | V |
Absolute Maximum Ratings
over operating free-air temperature range unless otherwise noted(1)
| ADS1255, ADS1256 | UNIT | ||
|---|---|---|---|
| AVDD to AGND | -0.3 to +6 | V | |
| DVDD to DGND | -0.3 to +3.6 | V | |
| AGND to DGND | -0.3 to +0.3 | V | |
| Input Current | 100, Momentary | mA | |
| 10, Continuous | mA | ||
| Analog inputs to AGND | -0.3 to AVDD + 0.3 | V | |
| Digital inputs | DIN, SCLK, CS, RESET, SYNC/PDWN, XTAL1/CLKIN to DGND | -0.3 to +6 | V |
| D0/CLKOUT, D1, D2, D3 to DGND | -0.3 to DVDD + 0.3 | V | |
| Maximum Junction Temperature | +150 | °C | |
| Operating Temperature Range | -40 to +105 | °C | |
| Storage Temperature Range | -60 to +150 | °C | |
| Lead Temperature (soldering, 10s) | +300 | °C |
(1) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied.
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
Package Information
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE
28 PINS SHOWN
NOTES: A. All linear dimensions are in millimeters.
- B. This drawing is subject to change without notice.
- C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
- D. Falls within JEDEC MO-150
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| ADS1256 | Texas Instruments | — |
| ADS1256IDB | Texas Instruments | — |
| ADS1256IDBR | Texas Instruments | — |
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