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Over-Sampling ADC. LTC2512-24 Datasheet

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Over-Sampling ADC. LTC2512-24 Datasheet






LTC2512-24 ADC. Datasheet pdf. Equivalent




LTC2512-24 ADC. Datasheet pdf. Equivalent





Part

LTC2512-24

Description

24-Bit Over-Sampling ADC



Feature


LTC2512-24 24-Bit Over-Sampling ADC with Configurable Flat Passband Digital Fil ter FEATURES n ±1ppm INL (Typ) n 117d B Dynamic Range (Typ) at 50ksps n 108dB Dynamic Range (Typ) at 400ksps n Guara nteed 24-Bits No Missing Codes n Config urable Digital Filter with Synchronizat ion n Relaxed Anti-Aliasing Filter Requ irements n Dual Output 24-Bit SAR ADC n 24-Bit Digitally F.
Manufacture

Analog Devices

Datasheet
Download LTC2512-24 Datasheet


Analog Devices LTC2512-24

LTC2512-24; iltered Low Noise Output n 14-Bit Differ ential + 8-Bit Common Mode No Latency O utput n Wide Input Common-Mode Range n Guaranteed Operation to 85°C n 1.8V to 5V SPI-Compatible Serial I/O n Low Pow er: 30mW at 1.6Msps n 24-Lead 7mm × 4m m DFN Package APPLICATIONS n Seismology n Energy Exploration n Automated Test Equipment (ATE) n High-Accuracy Instrum entation All registe.


Analog Devices LTC2512-24

red trademarks and trademarks are the pr operty of their respective owners. Prot ected by U.S. Patents, including 770576 5, 7961132, 8319673, 8576104, 8810443, 9054727, 9231611, 9331709 and Patents p ending. DESCRIPTION The LTC®2512-24 i s a low noise, low pow .


Analog Devices LTC2512-24

.

Part

LTC2512-24

Description

24-Bit Over-Sampling ADC



Feature


LTC2512-24 24-Bit Over-Sampling ADC with Configurable Flat Passband Digital Fil ter FEATURES n ±1ppm INL (Typ) n 117d B Dynamic Range (Typ) at 50ksps n 108dB Dynamic Range (Typ) at 400ksps n Guara nteed 24-Bits No Missing Codes n Config urable Digital Filter with Synchronizat ion n Relaxed Anti-Aliasing Filter Requ irements n Dual Output 24-Bit SAR ADC n 24-Bit Digitally F.
Manufacture

Analog Devices

Datasheet
Download LTC2512-24 Datasheet




 LTC2512-24
LTC2512-24
24-Bit Over-Sampling ADC
with Configurable Flat Passband Digital Filter
FEATURES
n ±1ppm INL (Typ)
n 117dB Dynamic Range (Typ) at 50ksps
n 108dB Dynamic Range (Typ) at 400ksps
n Guaranteed 24-Bits No Missing Codes
n Configurable Digital Filter with Synchronization
n Relaxed Anti-Aliasing Filter Requirements
n Dual Output 24-Bit SAR ADC
n 24-Bit Digitally Filtered Low Noise Output
n 14-Bit Differential + 8-Bit Common Mode
No Latency Output
n Wide Input Common-Mode Range
n Guaranteed Operation to 85°C
n 1.8V to 5V SPI-Compatible Serial I/O
n Low Power: 30mW at 1.6Msps
n 24-Lead 7mm × 4mm DFN Package
APPLICATIONS
n Seismology
n Energy Exploration
n Automated Test Equipment (ATE)
n High-Accuracy Instrumentation
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents, including 7705765, 7961132, 8319673, 8576104, 8810443, 9054727,
9231611, 9331709 and Patents pending.
DESCRIPTION
The LTC®2512-24 is a low noise, low power, high-perfor-
mance 24-bit ADC with an integrated configurable digital
filter. Operating from a single 2.5V supply, the LTC2512-
24 features a fully differential input range up to ±VREF,
with VREF ranging from 2.5V to 5.1V. The LTC2512-24
supports a wide common mode range from 0V to VREF
simplifying analog signal conditioning requirements.
The LTC2512-24 simultaneously provides two output
codes: (1) a 24-bit digitally filtered high precision low
noise code, and (2) a 22-bit no latency composite code.
The configurable digital filter reduces measurement noise
by lowpass filtering and down-sampling the stream of
data from the SAR ADC core, giving the 24-bit filtered
output code. The 22-bit composite code consists of a
14-bit code representing the differential voltage and an
8-bit code representing the common mode voltage. The
22-bit composite code is available each conversion cycle,
with no cycle of latency.
The digital filter can be easily configured for 4 different
down-sampling factors by pin strapping. The configura-
tions provide a dynamic range of 108dB at 400ksps and
117dB at 50ksps. The digital lowpass filter relaxes the
requirements for analog anti-aliasing. Multiple LTC2512-
24 devices can be easily synchronized using the SYNC pin.
TYPICAL APPLICATION
2.5V
1.8V TO 5V
IN+, IN
VREF ARBITRARY VREFDIFFERENTIAL
0V
VREF BIPOLAR
0V
VREF UNIPOLAR
0V 0V
DIFFERENTIAL INPUTS IN+/INWITH
WIDE INPUT COMMON MODE RANGE
10µF
0.1µF
VDD LTC2512-24 OVDD
IN+
24-BIT
SAR ADC
CORE
IN
REF
PIN SELECTABLE
LOW-PASS
FLAT PASSBAND
DIGITAL FILTER
24-BIT
14-BIT
GND
2.5V TO 5.1V
47µF
(X7R, 1210 SIZE)
MCLK
BUSY
DRL
SDOA
SCKA
RDLA
RDLB
SDOB
SCKB
251224 TA01
SAMPLE
CLOCK
For more information www.linear.com/LTC2512-24
Integral Nonlinearity
vs Input Voltage
3
2
1
0
–1
–2
–3
–5
–2.5 0
2.5
INPUT VOTLAGE (V)
5
251224f TA01a
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1




 LTC2512-24
LTC2512-24
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Supply Voltage (VDD) ...............................................2.8V
Supply Voltage (OVDD)................................................6V
Reference Input (REF).................................................6V
Analog Input Voltage (Note 3)
IN+, IN.........................(GND – 0.3V) to (REF + 0.3V)
Digital Input Voltage
(Note 3).......................... (GND – 0.3V) to (OVDD + 0.3V)
Digital Output Voltage
(Note 3).......................... (GND – 0.3V) to (OVDD + 0.3V)
Power Dissipation .............................................. 500mW
Operating Temperature Range
LTC2512C-24 ........................................... 0°C to 70°C
LTC2512I-24.........................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
PIN CONFIGURATION
RDLA 1
RDLB 2
VDD 3
GND 4
IN+ 5
IN6
GND 7
REF 8
REF 9
REF 10
SEL0 11
SEL1 12
TOP VIEW
25
GND
24 GND
23 GND
22 OVDD
21 BUSY
20 SDOB
19 SCKB
18 SCKA
17 SDOA
16 GND
15 DRL
14 SYNC
13 MCLK
DKD PACKAGE
24-LEAD (7mm 4mm) PLASTIC DFN
TJMAX = 125°C, θJA = 40°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION http://www.linear.com/product/LTC2512-24#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2512CDKD-24#PBF LTC2512CDKD-24#TRPBF 251224
24-Lead (7mm × 4mm) Plastic DFN
0°C to 70°C
LTC2512IDKD-24#PBF LTC2512IDKD-24#TRPBF 251224
24-Lead (7mm × 4mm) Plastic DFN
–40°C to 85°C
Consult ADI Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
VIN+ Absolute Input Range (IN+)
VIN– Absolute Input Range (IN)
VIN+ – VIN– Input Differential Voltage Range
VCM Common-Mode Input Range
IIN Analog Input Leakage Current
CIN Analog Input Capacitance
(Note 5)
(Note 5)
VIN = VIN+ – VIN–
Sample Mode
Hold Mode
l0
l0
l –VREF
l0
10
45
5
VREF
VREF
VREF
VREF
CMRR
Input Common Mode Rejection Ratio
Filtered Output
VIN+ = VIN– = 4.5VP-P, 2kHz Sine
128
UNITS
V
V
V
V
nA
pF
pF
dB
2
For more information www.linear.com/LTC2512-24
251224fa




 LTC2512-24
LTC2512-24
CONVERTER CHARACTERISTICS FOR FILTERED OUTPUT (SDOA) The l denotes
the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Resolution
l 24
Bits
No Missing Codes
l 24
Bits
DF Down-sampling Factor
l4
32
Transition Noise
INL Integral Linearity Error
DF = 4 (Note 6)
DF = 8 (Note 6)
DF = 16 (Note 6)
DF = 32 (Note 6)
(Note 7)
l –3.5
21
14.9
10.5
7.5
±1
LSBRMS
LLSSBBRRMMSS
LSBRMS
3.5 ppm
ZSE Zero-Scale Error
(Note 9)
l –14
0
14
ppm
Zero-Scale Error Drift
±7 ppb/°C
FSE Full-Scale Error
(Note 9)
l –100 ±10
100
ppm
Full-Scale Error Drift
±0.05
ppm/°C
DYNAMIC ACCURACY FOR FILTERED OUTPUT (SDOA) The l denotes the specifications
which apply over the full operating temperature range, otherwise specifications are at TA = 25°C and AIN = –1dBFS. (Notes 4, 10)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
DR
SINAD
SNR
THD
SFDR
Dynamic Range
Signal-to-(Noise + Distortion) Ratio
Signal-to-Noise Ratio
Total Harmonic Distortion
Spurious Free Dynamic Range
Aperture Delay
fIN = 2kHz, VREF = 5V, DF = 4
fIN = 2kHz, VREF = 5V, DF = 8
fIN = 2kHz, VREF = 5V, DF = 16
fIN = 2kHz, VREF = 5V, DF = 32
fIN = 2kHz, VREF = 5V, DF = 4
fIN = 2kHz, VREF = 5V, DF = 4
fIN = 2kHz, VREF = 5V, DF = 4
fIN = 2kHz, VREF = 2.5V, DF = 4
fIN = 2kHz, VREF = 5V, DF = 4
fIN = 2kHz, VREF = 2.5V, DF = 4
l 103
l 103
l
l 110
108
111
114
117
107
107
–120 –110
–120
120
120
500
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
ps
Aperture Jitter
Transient Response
Full-Scale Step
4 psRMS
152 ns
For more information www.linear.com/LTC2512-24
251224fa
3



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