1FEATURES
2• AC Performance:
103dB of Dynamic Range at 4MSPS
111dB of Dynamic Range at 125kSPS
–107dB THD
• DC Accuracy:
3ppm INL
4mV/°C Offset Drift
4ppm/°C Gain Drift
• Programmable Digital Filter with
User-Selectable Path:
– Low-Latency: Completely settles in 2.65ms
– Wide-Bandwidth: 1.7MHz BW with flat
passband
• Flexible Read-Only Serial Interface:
– Standard CMOS
– Serialized LVDS
• Easy Conversion Control with START Pin
• Out-of-Range Detection
• Supply: Analog +5V, Digital +3V
• Power: 575mW

APPLICATIONS
• Automated Test Equipment
• Medical Imaging
• Scientific Instrumentation
• Test and Measurement

DESCRIPTION
The ADS1675 is a high-speed, high-precision
analog-to-digital converter (ADC). Using an advanced
delta-sigma (ΔΣ) architecture, it operates at speeds
up to 4MSPS with outstanding ac performance and
dc accuracy.
The ADS1675 ADC is comprised of a low-drift
modulator with out-of-range detection and a dual-path
programmable digital filter. The dual filter path allows
the user to select between two post-processing filters:
Low-Latency or Wide-Bandwidth. The Low-Latency filter settles quickly (as fast as 2.65ms) for
applications with large instantaneous changes, such
as a multiplexer. The Wide-Bandwidth path provides
an optimized frequency response for ac
measurements with a passband ripple of less than ±0.00002dB, stop band attenuation of 86dB, and a
bandwidth of 1.7MHz.
The device offers two speed modes with distinct
interface, resolution, and feature set. In the
high-speed mode the device can be set to operate at
either 4MSPS or 2MSPS. In the low-speed mode, it can be set to operate at either 1MSPS, 500KSPS,
250KSPS or 125KSPS.
The ADS1675 is controlled through I/O pins—there are no registers to program. A dedicated START pin
allows for direct control of conversions: toggle the
START pin to begin a conversion, and then retrieve
the output data. The flexible serial interface supports
data readback with either standard CMOS and LVDS
logic levels, allowing the ADS1675 to directly connect
to a wide range of microcontrollers, digital signal
processors (DSPs), or field-programmable grid arrays
(FPGAs).
The ADS1675 operates from an analog supply of 5V
and digital supply of 3V, and dissipates 575mW of
power. When not in use, the PDWN pin can be used
to power down all device circuitry. The device is fully
specified over the industrial temperature range and is
offered in a TQFP-64 package.