ADS8405 Datasheet, PDF (1/29 Pages) Texas Instruments – Unipolar Pseudo-Differential Input, 0 V to Vref, 16-Bit NMC at 1.25 MSPS, ±2 LSB INL Max, -1/+1.5 LSB DNL

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
• Unipolar Pseudo-Differential Input, 0 V to V_ref
• 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
APPLICATIONS
• 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 in-
cludes 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 in-
put. It is available in a 48-lead TQFP package and is
characterized over the industrial -40°C to 85°C tem-
perature range.
Type/Speed
18-Bit Pseudo-Diff
500 kHz
ADS8383
18-Bit Pseudo-Bipolar, Fully Diff
16-Bit Pseudo-Diff
16-Bit Pseudo-Bipolar, Fully Diff
14-Bit Pseudo-Diff
12-Bit Pseudo-Diff
High Speed SAR Converter Family
~600 kHz
750 kHz
ADS8381
ADS8380 (S)
ADS8382 (S)
ADS8371
1 MHz
ADS7886
1.25 MHz
2 MHz
ADS8401/05 ADS8411
ADS8402/06 ADS8412
ADS7890 (S)
3 MHz
ADS7891
4 MHz
ADS7881
REFOUT
+IN
−IN
REFIN
+
_
CDAC
4.096-V
Internal
Reference
SAR
Comparator
Clock
Output
Latches
and
3-State
Drivers
Conversion
and
Control Logic
BYTE
16-/8-Bit
Parallel DATA
Output Bus
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