Typical applicaTion
FeaTures
DescripTion
SAR ADC with 97dB SNR The L TC ®2376-16 is a low noi, low power , high speed 16-bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the L TC2376-16 has a ±V REF fully differential input range with V REF ranging from 2.5V to 5.1V . The L TC2376-16 consumes only 3.4mW and achieves ±0.5LSB INL maximum, no missing codes at 16 bits with 97dB SNR.
The L TC2376-16 has a high speed SPI-compatible -rial interface that supports 1.8V , 2.5V , 3.3V and 5V logic while also featuring a daisy-chain mode. The fast 250ksps throughput with no cycle latency makes the L TC2376-16 ideally suited for a wide variety of high speed applications. An internal oscillator ts the conversion time, easing exter-nal timing considerations. The L TC2376-16 automatically powers down between conversions, leading to reduced power dissipation that scales with
the sampling rate.The L TC2376-16 features a unique digital gain compres-sion (DGC) function, which eliminates the driver amplifier’s negative supply while prerving the full resolution of the ADC. When enabled, the ADC performs a digital scaling function that maps zero-scale code from 0V to 0.1 • V REF and full-scale code from V REF to 0.9 • V REF . For a typical reference voltage of 5V , the full-scale input range is now 0.5V to 4.5V , which provides adequate headroom for powering the driving amplifier from a single 5.5V supply.
32k Point FFT f S = 250ksps, f IN = 2kHz
applicaTions
n
250ksps Throughput Rate n ±0.5LSB INL (Max)
n Guaranteed 16-Bit No Missing Codes
n Low Power: 3.4mW at 250ksps, 3.4µW at 250sps n 97dB SNR (Typ) at f IN
= 2kHz n –125dB THD (Typ) at f IN
= 2kHz n Digital Gain Compression (DGC)n Guaranteed Operation to 125°C n 2.5V Supply
n Fully Differential Input Range ±V REF n V REF Input Range from 2.5V to 5.1V n No Pipeline Delay, No Cycle Latency n 1.8V to 5V I/O Voltages
n SPI-Compatible Serial I/O with Daisy-Chain Mode n Internal Conversion Clock
n 16-Lead MSOP and 4mm × 3mm DFN Packages
n
Medical Imaging
n High Speed Data Acquisition
n Portable or Compact Instrumentation n Industrial Process Control
n Low Power Battery-Operated Instrumentation n ATE
FREQUENCY (kHz)
A M P L I T U D E (d
B F S )
237616 TA02
V V L , L T , L TC, L TM, Linear Technology and the Linear logo are registered trademarks and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
pin conFiguraTion
absoluTe MaxiMuM raTings
Supply Voltage (V DD ) ...............................................2.8V Supply Voltage (OV DD ) ................................................6V Reference Input (REF) .................................................6V Analog Input Voltage (Note 3)
IN +, IN – .........................(GND –0.3V) to (REF + 0.3V)REF/DGC Input (Note 3) ....(GND –0.3V) to (REF + 0.3V)Digital Input Voltage
(Note 3) ...........................(GND –0.3V) to (OV DD + 0.3V)
(Notes 1, 2)
16151413121110917GND
12345678
GND OV DD SDO SCK RDL/SDI BUSY GND CNV
CHAIN V DD GND IN +IN –GND REF REF/DGC
TOP VIEW
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
T JMAX = 150°C, θJA = 40°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
12345678
CHAIN V DD GND IN +IN –GND REF REF/DGC
161514131211109
GND OV DD SDO SCK RDL/SDI BUSY GND CNV
TOP VIEW
MS PACKAGE
16-LEAD PLASTIC MSOP T JMAX = 150°C, θJA = 110°C/W
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING*PACKAGE DESCRIPTION TEMPERATURE RANGE L TC2376CMS-16#PBF L TC2376CMS-16#TRPBF 23761616-Lead Plastic MSOP 0°C to 70°C L TC2376IMS-16#PBF L TC2376IMS-16#TRPBF 23761616-Lead Plastic MSOP –40°C to 85°C L TC2376HMS-16#PBF L TC2376HMS-16#TRPBF 23761616-Lead Plastic MSOP
–40°C to 125°C L TC2376CDE-16#PBF L TC2376CDE-16#TRPBF 2376616-Lead (4mm × 3mm) Plastic DFN 0°C to 70°C L TC2376IDE-16#PBF
L TC2376IDE-16#TRPBF
23766
16-Lead (4mm × 3mm) Plastic DFN
–40°C to 85°C
Consult L TC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container . Consult L TC Marketing for information on non-standard lead bad finish parts.
For more information on lead free part marking, go to: www.linear .com/leadfree/
For more information on tape and reel specifications, go to: www.linear .com/tapeandreel/
Digital Output Voltage
(Note 3) ...........................(GND –0.3V) to (OV DD + 0.3V)Power Dissipation ..............................................500mW Operating Temperature Range
LTC2376C ................................................0°C to 70°C LTC2376I .............................................–40°C
to 85°C LTC2376H ..........................................–40°C to 125°C Storage Temperature Range ..................–65°C to 150°C
DynaMic accuracy SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS SINAD Signal-to-(Noi + Distortion) Ratio f IN = 2kHz, V REF = 5V
l 94.697dB f IN = 2kHz, V REF = 5V , (H-Grade)l 94.597dB SNR
Signal-to-Noi Ratio
f IN = 2kHz, V REF = 5V
f IN = 2kHz, V REF = 5V , REF/DGC = GND f IN = 2kHz, V REF = 2.5V
l l l 95.3 94.5 92.197 96.4 95dB dB dB f IN = 2kHz, V REF = 5V , (H-Grade)
f IN = 2kHz, V REF = 5V , REF/DGC = GND, (H-Grade) f IN = 2kHz, V REF = 2.5V , (H-Grade)
l l l 95.2 94.3 91.8
97 96.4 95dB dB dB
THD
Total Harmonic Distortion
f IN = 2kHz, V REF = 5V
f IN = 2kHz, V REF = 5V , REF/DGC = GND f IN = 2kHz, V REF = 2.5V l l l –125 –125 –123
–103 –101 –103dB dB dB SFDR Spurious Free Dynamic Range f IN = 2kHz, V REF = 5V
l
104126dB –3dB Input Bandwidth 34MHz Aperture Delay 500ps Aperture Jitter 4
ps T ransient Respon
Full-Scale Step 3.46
µs
The l denotes the specifications which apply over the full operating temperature range,
otherwi specifications are at T A = 25°C and A IN = –1dBFS. (Notes 4, 8)
elecTrical characTerisTics
SYMBOL PARAMETER
rolls royce
CONDITIONS MIN TYP MAX UNITS
V IN +Absolute Input Range (IN +)(Note 5)l –0.05V REF + 0.05V V IN –Absolute Input Range (IN –)(Note 5)l –0.05V REF + 0.05V V IN + – V IN –Input Differential Voltage Range V IN = V IN + – V IN –
l –V REF +V REF
V V CM Common-Mode Input Range l V REF /2–0.1
V REF /2
V REF /2+ 0.1V I IN Analog Input Leakage Current l
±1
µA C IN Analog Input Capacitance
Sample Mode Hold Mode 45 5pF pF CMRR
Input Common Mode Rejection Ratio
f IN = 125kHz 86
dB
The l denotes the specifications which apply over the full operating temperature range, otherwi specifications are at T A = 25°C. (Note 4)
converTer characTerisTics
六级准考证号忘了怎么查成绩
SYMBOL PARAMETER
CONDITIONS
章程英文
嗨书MIN TYP MAX UNITS Resolution l 16Bits No Missing Codes l
16
Bits
T ransition Noi
0.15
LSB RMS
INL Integral Linearity Error (Note 6)l –0.5±0.20.5LSB DNL Differential Linearity Error l –0.5±0.10.5LSB BZE Bipolar Zero-Scale Error (Note 7)
l
doggy style是什么
–404LSB Bipolar Zero-Scale Error Drift 1mLSB/°C
FSE护发素怎么用
Bipolar Full-Scale Error (Note 7)
l
–13
±213
LSB Bipolar Full-Scale Error Drift
±0.05
ppm/°C
The l denotes the specifications which apply over the full operating temperature range, otherwi specifications are at T A = 25°C. (Note 4)
aDc TiMing characTerisTics SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS f SMPL Maximum Sampling Frequency l 250ksps t CONV Conversion Time l 1.93µs t ACQ Acquisition Time
t ACQ = t CYC – t HOLD (Note 10)l 3.46
µs t HOLD Maximum Time Between Acquisitions l 540
ns t CYC Time Between Conversions l 4µs t CNVH CNV High Time l 20
ns
t BUSYLH CNV ↑ to BUSY Delay C L = 20pF l 13
ns t CNVL Minimum Low Time for CNV (Note 11)l 20ns t QUIET
SCK Quiet Time from CNV ↑
(Note 10)
l
20
ns等等 英文
The l denotes the specifications which apply over the full operating
temperature range, otherwi specifications are at T A = 25°C. (Note 4)
power requireMenTs SYMBOL PARAMETER CONDITIONS
MIN TYP MAX UNITS
V DD Supply Voltage l 2.375 2.5 2.625V OV DD Supply Voltage l 1.71
5.25V I VDD I OVDD I PD I PD Supply Current
Supply Current Power Down Mode Power Down Mode 250ksps Sample Rate
250ksps Sample Rate (C L = 20pF) Conversion Done (I VDD + I OVDD + I REF )
Conversion Done (I VDD + I OVDD + I REF , H-Grade)l l l
1.36 0.05 0.9 0.9 1.7 90 140mA mA µA µA P D
Power Dissipation Power Down Mode Power Down Mode
250ksps Sample Rate
Conversion Done (I VDD + I OVDD + I REF )
Conversion Done (I VDD + I OVDD + I REF , H-Grade)
3.4 2.25 2.25
4.25 225 315
mW µW µW
The l denotes the specifications which apply over the full operating temperature
range, otherwi specifications are at T A = 25°C. (Note 4)
reFerence inpuT SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V REF Reference Voltage (Note 5)l 2.5
hurryup5.1V I REF Reference Input Current
(Note 9)
l 0.16
0.2mA V IH DGC High Level Input Voltage REF/DGC Pin l 0.8V REF
V V IL DGC
Low Level Input Voltage REF/DGC Pin
l
0.2V REF
V
The l denotes the specifications which apply over the full operating temperature range, otherwi
specifications are at T A = 25°C. (Note 4)
DigiTal inpuTs anD DigiTal ouTpuTs
SYMBOL PARAMETER CONDITIONS
MIN
TYP MAX UNITS
V IH High Level Input Voltage l 0.8 • OV DD
V V IL Low Level Input Voltage l
0.2 • OV DD
V I IN Digital Input Current V IN = 0V to OV DD
l
–10
10
µA C IN Digital Input Capacitance 5
pF V OH High Level Output Voltage I O = –500µA l OV DD – 0.2
V
V OL Low Level Output Voltage I O = 500µA l 0.2
V I OZ Hi-Z Output Leakage Current V OUT = 0V to OV DD l
–10
10µA I SOURCE Output Source Current V OUT = 0V –10mA I SINK
Output Sink Current
V OUT = OV DD
10
mA
The l denotes the specifications which apply over the full operating temperature range, otherwi specifications are at T A = 25°C. (Note 4)
aDc TiMing characTerisTics
The
2013高考数学试卷及答案l denotes the specifications which apply over the full operating temperature range, otherwi specifications are at T A = 25°C. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS t SCK SCK Period(Notes 11, 12)l10ns t SCKH SCK High Time l4ns t SCKL SCK Low Time l4ns t SSDISCK SDI Setup Time From SCK↑(Note 11)l4ns t HSDISCK SDI Hold Time From SCK↑(Note 11)l1ns t SCKCH SCK Period in Chain Mode t SCKCH = t SSDISCK + t DSDO (Note 11)l13.5ns t DSDO SDO Data Valid Delay from SCK↑C L = 20pF (Note 11)l9.5ns t HSDO SDO Data Remains Valid Delay from SCK↑C L = 20pF (Note 10)l1ns t DSDOBUSYL SDO Data Valid Delay from BUSY↓C L = 20pF (Note 10)l5ns t EN Bus Enable Time After RDL↓(Note 11)l16ns t DIS Bus Relinquish Time After RDL↑ (Note 11)l13ns
Note 1: Stress beyond tho listed under Absolute Maximum Ratings may cau permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may effect device reliability and lifetime.allen什么意思
Note 2: All voltage values are with respect to ground.
Note 3: When the pin voltages are taken below ground or above REF or OV DD, they will be clamped by internal diodes. This product can handle input currents up to 100mA below ground or ab
ove REF or OV DD without latch-up.
Note 4: V DD = 2.5V, OV DD = 2.5V, REF = 5V, V CM = 2.5V, f SMPL = 250kHz, REF/DGC = V REF.
Note 5: Recommended operating conditions.
Note 6: Integral nonlinearity is defined as the deviation of a code from a straight line passing through the actual endpoints of the transfer curve. The deviation is measured from the center of the quantization band.Note 7: Bipolar zero-scale error is the offt voltage measured from
–0.5LSB when the output code flickers between 0000 0000 0000 0000 and 1111 1111 1111 1111. Full-scale bipolar error is the worst-ca of –FS
or +FS untrimmed deviation from ideal first and last code transitions and includes the effect of offt error.
Note 8: All specifications in dB are referred to a full-scale ±5V input with a 5V reference voltage.
Note 9: f SMPL = 250kHz, I REF varies proportionately with sample rate. Note 10: Guaranteed by design, not subject to test.
Note 11: Parameter tested and guaranteed at OV DD = 1.71V, OV DD = 2.5V and OV DD = 5.25V.
Note 12: t SCK of 10ns maximum allows a shift clock frequency up to
100MHz for rising capture.
DD
DD
Figure 1. Voltage Levels for Timing Specifications