BurrĆBrown Products
from Texas Instruments
ADS8405
SLAS427 – DECEMBER 2004
16-BIT, 1.25-MSPS, UNIPOLAR PSEUDO-DIFFERENTIAL INPUT, MICROPOWER
SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE
FEATURES
APPLICATIONS
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Unipolar Pseudo-Differential Input, 0 V to Vref
16-Bit NMC at 1.25 MSPS
±2 LSB INL Max, -1/+1.5 LSB DNL
86 dB SNR, -90 dB THD at 100 kHz Input
Zero Latency
Internal 4.096-V Reference
High-Speed Parallel Interface
Single 5-V Analog Supply
Wide I/O Supply: 2.7 V to 5.25 V
Low Power: 155 mW at 1.25 MHz Typ
Pin Compatible With ADS8411/8401
48-Pin TQFP Package
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DWDM
Instrumentation
High-Speed, High-Resolution, Zero Latency
Data Acquisition Systems
Transducer Interface
Medical Instruments
Communications
DESCRIPTION
The ADS8405 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 ADS8405 offers a
full 16-bit interface and an 8-bit option where data is
read using two 8-bit read cycles if necessary.
The ADS8405 has a unipolar pseudo-differential input. It is available in a 48-lead TQFP package and is
characterized over the industrial -40°C to 85°C temperature range.
High Speed SAR Converter Family
Type/Speed
18-Bit Pseudo-Diff
500 kHz
~600 kHz
ADS8383
750 kHz
1 MHz
1.25 MHz
2 MHz
3 MHz
4 MHz
ADS8381
ADS8380 (S)
18-Bit Pseudo-Bipolar, Fully Diff
ADS8382 (S)
16-Bit Pseudo-Diff
ADS8401/05
ADS8411
16-Bit Pseudo-Bipolar, Fully Diff
ADS8371
ADS8402/06
ADS8412
14-Bit Pseudo-Diff
ADS7890 (S)
12-Bit Pseudo-Diff
ADS7891
ADS7886
SAR
+IN
−IN
+
_
CDAC
ADS7881
Output
Latches
and
3-State
Drivers
BYTE
16-/8-Bit
Parallel DATA
Output Bus
Comparator
REFIN
REFOUT
4.096-V
Internal
Reference
Clock
Conversion
and
Control Logic
RESET
CONVST
BUSY
CS
RD
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004, Texas Instruments Incorporated
