ADS8402
SLAS154B – DECEMBER 2002 – REVISED MAY 2003
16-BIT, 1.25 MSPS, UNIPOLAR DIFFERENTIAL INPUT, MICRO POWER SAMPLING
ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE AND REFERENCE

FEATURES
C0068 1.25-MHz Sample Rate
C0068 16-Bit NMC Ensured Over Temperature
C0068 Zero Latency
C0068 Unipolar Differential Input Range: V
ref
to –V
ref
C0068 Onboard Reference
C0068 Onboard Reference Buffer
C0068 High-Speed Parallel Interface
C0068 Power Dissipation: 155 mW at 1.25 MHz Typ
C0068 Wide Digital Supply
C0068 8-/16-Bit Bus Transfer
C0068 48-Pin TQFP Package
APPLICATIONS
C0068 DWDM
C0068 Instrumentation
C0068 High-Speed, High-Resolution, Zero Latency
Data Acquisition Systems
C0068 Transducer Interface
C0068 Medical Instruments
C0068 Communication
DESCRIPTION
The ADS8402 is a 16-bit, 1.25 MHz A/D converter with an
internal 4.096-V reference. The device includes a 16-bit
capacitor-based SAR A/D converter with inherent sample
and hold. The ADS8402 offers a full 16-bit interface and an
8-bit option where data is read using two 8-bit read cycles.
The ADS8402 has a unipolar differential input. It is
available in a 48-lead TQFP package and is characterized
over the industrial –40°C to 85°C temperature range.
CDAC
_
+
Output
Latches
and
3-State
Drivers
BYTE
16-/8-Bit
Parallel DATA
Output Bus
SAR
Conversion
and
Control Logic
Comparator
Clock
+IN
–IN
REFIN
CONVST
BUSY
CS
RD
RESET
4.096-V
Internal
Reference
REFOUT
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
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.
Copyright  2002–2003, Texas Instruments Incorporated