Analog-to-Digital Converter. ADS8863 Datasheet

ADS8863 Converter. Datasheet pdf. Equivalent

ADS8863 Datasheet
Recommendation ADS8863 Datasheet
Part ADS8863
Description SAR Analog-to-Digital Converter
Feature ADS8863; ADS8863 www.ti.com SBAS571A – MAY 2013 – REVISED DECEMBER 2013 16-Bit, 680-kSPS, Serial Interface,.
Manufacture etcTI
Datasheet
Download ADS8863 Datasheet




Texas Instruments ADS8863
ADS8863
www.ti.com
SBAS571A – MAY 2013 – REVISED DECEMBER 2013
16-Bit, 680-kSPS, Serial Interface, microPower, Miniature,
True-Differential Input, SAR Analog-to-Digital Converter
Check for Samples: ADS8863
FEATURES
1
234 Sample Rate: 680 kHz
• No Latency Output
• Unipolar, True-Differential Input Range:
–VREF to +VREF
• Wide Common-Mode Voltage Range:
0 V to VREF with 90-dB CMRR (min)
• SPI™-Compatible Serial Interface with
Daisy-Chain Option
• Excellent AC and DC Performance:
– SNR: 96 dB, THD: –115 dB
– INL: ±1.0 LSB (max)
– DNL: ±1.0 LSB (max), 16-Bit NMC
• Wide Operating Range:
– AVDD: 2.7 V to 3.6 V
– DVDD: 1.65 V to 3.6 V
(Independent of AVDD)
– REF: 2.5 V to 5 V (Independent of AVDD)
– Operating Temperature: –40°C to +85°C
• Low-Power Dissipation:
– 4.2 mW at 680 kSPS
– 0.6 mW at 100 kSPS
– 60 µW at 10 kSPS
• Power-Down Current (AVDD): 50 nA
• Full-Scale Step Settling to 16 Bits: 540 ns
• Packages: MSOP-10 and SON-10
APPLICATIONS
• Automatic Test Equipment (ATE)
• Instrumentation and Process Controls
• Precision Medical Equipment
• Low-Power, Battery-Operated Instruments
DESCRIPTION
The ADS8863 is a 16-bit, 680-kSPS, true-differential
input, analog-to-digital converter (ADC). The device
operates with a 2.5-V to 5-V external reference,
offering a wide selection of signal ranges without
additional input signal scaling. The reference voltage
setting is independent of, and can exceed, the analog
supply voltage (AVDD).
The device offers an SPI-compatible serial interface
that also supports daisy-chain operation for
cascading multiple devices. An optional busy-
indicator bit makes synchronizing with the digital host
easy.
The device supports unipolar, true-differential analog
input signals with a differential input swing of –VREF to
+VREF. This true-differential analog input structure
allows for a common-mode voltage of any value in
the range of 0 V to +VREF (when both inputs are
within the operating input range of –0.1 V to VREF
+ 0.1 V).
Device operation is optimized for very low-power
operation. Power consumption directly scales with
speed. This feature makes the ADS8863 excellent for
lower-speed applications.
Traditional Input Range
ADS8863 Input Range
0V
VDIFF
+VREF
-VREF
True-Differential Input Range
VREF
VCM
VREF
VCM
0V
VREF/2
0 V - VREF
0 V - VREF
2.5 V to 5 V 2.7 V to 3.6 V
AINP
AINM
REF
AVDD
DVDD
DIN
ADS8863
SCLK
DOUT
CONVST
GND
1.65 V to 3.6 V
1
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.
TINA is a trademark of Texas Instruments Inc..
2
SPI is a trademark of Motorola Inc.
3
All other trademarks are the property of their respective owners.
4
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 © 2013, Texas Instruments Incorporated



Texas Instruments ADS8863
ADS8863
SBAS571A – MAY 2013 – REVISED DECEMBER 2013
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
THROUGHPUT
100 kSPS
250 kSPS
400 kSPS
500 kSPS
680 kSPS
1 MSPS
FAMILY INFORMATION(1)
18-BIT, TRUE-DIFFERENTIAL
16-BIT, SINGLE-ENDED
ADS8887
ADS8866
——
ADS8885
ADS8864
ADS8319 (2)
ADS8883
ADS8862
ADS8881
ADS8860
16-BIT, TRUE-DIFFERENTIAL
ADS8867
ADS8865
ADS8318 (2)
ADS8863
ADS8861
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or visit the
device product folder at www.ti.com.
(2) Pin-to-pin compatible device with AVDD = 5 V.
ABSOLUTE MAXIMUM RATINGS(1)
Over operating free-air temperature range, unless otherwise noted.
VALUE
MIN
MAX
UNIT
AINP to GND or AINN to GND
–0.3
REF + 0.3
V
AVDD to GND or DVDD to GND
–0.3 4 V
REF to GND
–0.3 5.7 V
Digital input voltage to GND
–0.3 DVDD + 0.3 V
Digital output to GND
–0.3 DVDD + 0.3 V
Operating temperature range, TA
Storage temperature range, Tstg
–40 +85 °C
–65
+150
°C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under electrical characteristics is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
THERMAL INFORMATION
THERMAL METRIC(1)
ADS8863
DGS
DRC
UNITS
10 PINS
10 PINS
θJA
θJCtop
θJB
ψJT
ψJB
θJCbot
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
151.9
45.4
72.2
3.3
70.9
N/A
111.1
46.4
45.9
3.5
45.5
N/A
°C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
2 Submit Documentation Feedback
Product Folder Links: ADS8863
Copyright © 2013, Texas Instruments Incorporated



Texas Instruments ADS8863
ADS8863
www.ti.com
SBAS571A – MAY 2013 – REVISED DECEMBER 2013
ELECTRICAL CHARACTERISTICS
All minimum and maximum specifications are at TA = –40°C to +85°C, AVDD = 3 V, DVDD = 3 V, VREF = 5 V,
VCM = VREF / 2 V, and fSAMPLE = 680 kSPS, unless otherwise noted.
Typical specifications are at TA = +25°C, AVDD = 3 V, and DVDD = 3 V.
PARAMETER
TEST CONDITIONS
MIN TYP
MAX
ANALOG INPUT
Full-scale input span(1)(2)
Operating input range(1)(2)
VCM Input common-mode range
CI Input capacitance
Input leakage current
AINP – AINN
AINP
AINN
AINP and AINN terminal to GND
During acquisition for dc input
–VREF
–0.1
–0.1
0
VREF / 2
59
5
VREF
VREF + 0.1
VREF + 0.1
VREF
SYSTEM PERFORMANCE
Resolution
16
NMC No missing codes
16
DNL Differential linearity
–0.99
±0.5
1
INL Integral linearity(4)
–1 ±0.5
1
EO Offset error(5)
Offset error drift with temperature
–4 ±1
±1.5
4
EG Gain error
Gain error drift with temperature
–0.01
±0.005
±0.15
0.01
CMRR Common-mode rejection ratio
PSRR Power-supply rejection ratio
With common-mode input signal = 5 VPP at dc
At mid-code
90 100
80
Transition noise
0.35
SAMPLING DYNAMICS
tconv Conversion time
tACQ Acquisition time
Maximum throughput rate
with or without latency
500 930
540
680
Aperture delay
4
Aperture jitter, RMS
5
Step response
Settling to 16-bit accuracy
540
Overvoltage recovery
Settling to 16-bit accuracy
540
UNIT
V
V
V
V
pF
nA
Bits
Bits
LSB (3)
LSB (3)
mV
µV/°C
%FSR
ppm/°C
dB
dB
LSB
ns
ns
kHz
ns
ps
ns
ns
(1) Ideal input span, does not include gain or offset error.
(2) Specified for VCM = VREF / 2. Refer to the Analog Input section for the effect of VCM on the full-scale input range.
(3) LSB = least significant bit.
(4) This parameter is the endpoint INL, not best-fit.
(5) Measured relative to actual measured reference.
Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: ADS8863
Submit Documentation Feedback
3





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)