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ADS1258IRTCR-ADS1258IRTCT-ADS1258IRTCTG4
16-Channel, 24-Bit Analog-to-Digital Converter
ADS1258DRDY
ADS1258
www.ti.com SBAS297G –JUNE 2005–REVISED MARCH 2011
16-Channel, 24-Bit Analog-to-Digital Converter
Checkfor Samples: ADS1258
1FEATURES DESCRIPTIONThe ADS1258 is a 16-channel (multiplexed),
23• 24 Bits, No Missing Codes low-noise, 24-bit, delta-sigma (ΔΣ) analog-to-digital•
Fixed-Channelor Automatic Channel Scan converter (ADC) that provides single-cycle settled
Fixed-Channel Data Rate: 125kSPS data at channel scan rates from 1.8k to 23.7k
samples per second (SPS) per channel.A flexible•
Auto-Scan Data Rate: 23.7kSPS/Channel input multiplexer accepts combinations of eight•
Single-Conversion Settled Data differentialor 16 single-ended inputs witha full-scale•
16 Single-Endedor8 Differential Inputs differential rangeof 5Vor true bipolar rangeof ±2.5V
when operating witha 5V reference. The fourth-order•
Unipolar (+5V)or Bipolar (±2.5V) Operationdelta-sigma modulatoris followedbya fifth-order sinc•
Low Noise: 2.8μVRMSat 1.8kSPS digital filter optimized for low-noise performance.•
0.0003% Integral Nonlinearity The differential outputof the multiplexeris accessible•
DC Stability (typical): to allow signal conditioning priorto the inputof the
0.02μV/°C Offset Drift, 0.4ppm/°C Gain Drift ADC. Internal system monitor registers provide
Open-Sensor Detection supply voltage, temperature, reference voltage, gain,
and offset data.•
Conversion Control Pin Multiplexer Output for External Signal An onboard PLL generates the system clock froma
32.768kHz crystal, or can be overridden by an
Conditioningexternal clock source.A buffered system clock output•
On-Chip Temperature, Reference, Offset, Gain, (15.7MHz)is providedto drivea microcontrolleror
and Supply Voltage Readback additional converters.•
42mW Power Dissipation Serial digital communicationis handled via an SPI™•
Standby, Sleep, and Power-Down Modes -compatible interface. A simple command word•
8 General-Purpose Inputs/Outputs (GPIO) structure controls channel configuration, data rates,
digital I/O, monitor functions, etc.•
32.768kHz Crystal Oscillatoror External ClockProgrammable sensor bias current sources can be
APPLICATIONS usedto bias sensorsor verify sensor integrity.
Medical, Avionics, and Process Control The ADS1258 operates froma unipolar +5V or•
Machine and System Monitoring bipolar ±2.5V analog supply anda digital supply
compatible with interfaces ranging from 2.7V to
Instrumentation 5.25V. The ADS1258 is available ina QFN-48 package.
