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
APPLICATIONS
D DWDM
D Instrumentation
D High-Speed, High-Resolution, Zero Latency
D 1.25-MHz Sample Rate
D 16-Bit NMC Ensured Over Temperature
Data Acquisition Systems
D Zero Latency
D Onboard Reference
D Transducer Interface
D Medical Instruments
D Communication
D Onboard Reference Buffer
DESCRIPTION
D High-Speed Parallel Interface
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.
D Unipolar Differential Input Range: Vref to –Vref
D Power Dissipation: 155 mW at 1.25 MHz Typ
D Wide Digital Supply
D 8-/16-Bit Bus Transfer
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.
D 48-Pin TQFP Package
SAR
+IN
–IN
+
_
Output
Latches
and
3-State
Drivers
CDAC
BYTE
16-/8-Bit
Parallel DATA
Output Bus
Comparator
RESET
REFIN
REFOUT
4.096-V
Internal
Reference
Clock
Conversion
and
Control Logic
CONVST
BUSY
CS
RD
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semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
Copyright 2002–2003, Texas Instruments Incorporated