1FEATURES
23• 24 Bits, No Missing Codes
• Output Data Rates From 10 To 14kSPS
• High Performance:
– INL: 0.4ppm
– Reference Drift: 2ppm/°C
– Gain Drift: 0.5ppm/°C
– Offset Drift: 0.05μV/°C
– Noise: 0.7μVRMS at 60SPS
• Simultaneous 50/60Hz Rejection at 10SPS
• Single-Cycle Settling
• Internal Oscillator
• Out-of-Range Detection
• Readback Data Integrity by Checksum and
Redundant Data Read Capability
• SPI™-Compatible Interface
• Analog Supply: +5V or ±2.5V
• Digital Supply: +2.7V to +5V
• Low Power: 13mW

APPLICATIONS
• Industrial Process Control
• Scientific Instrumentation
• Test and Measurement

DESCRIPTION
The ADS1259 is a high-linearity, low-drift, 24-bit,
analog-to-digital converter (ADC) designed for the
needs of industrial process control, precision
instrumentation, and other exacting applications.
Combined with a signal amplifier (such as the
PGA280), a high-resolution, high-accuracy measurement system is formed that is capable of
digitizing a wide range of signals.
The converter uses a fourth-order, inherently stable,
delta-sigma (ΔΣ) modulator that provides outstanding
noise and linearity performance. The data rates are
programmable up to 14kSPS including 10SPS, 50SPS, and 60SPS that provide excellent normal
mode line-cycle rejection. The digital filter can be
programmed for a fast settling mode where the
conversions settle in a single cycle, or programmed
for a high line-cycle rejection mode. A fast responding input over-range detector flags the conversion data if
an input over-range should occur.
The ADS1259 also provides an integrated low-noise,
very low drift 2.5V reference. The on-chip oscillator,
an external crystal, or an external clock can by used
as the ADC clock source.
Data and control communication are handled over a
4MHz, SPI-compatible interface capable of operating
with a minimum of three wires. Data integrity is
augmented by data bytes checksum and redundant
data read capability. Conversions are synchronized
either by command or by pin.
Dissipating only 13mW in operation, the ADS1259
can be powered down, dissipating less than 25μW.
The ADS1259 is offered in a TSSOP-20 package and
is fully specified from –40°C to +105°C.