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Linear Technology Electronic Components Datasheet

LTC1855 Datasheet

100ksps ADC Converters

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LTC1855 pdf
FEATURES
Single 5V Supply
Sample Rate: 100ksps
8-Channel Multiplexer with ±30V Protection
±10V Bipolar Input Range
Single Ended or Differential
±3LSB INL for the LTC1856, ±1.5LSB INL for the
www.DaLtTaCSh1e8e5t54U,.±co1mLSB INL for the LTC1854
Power Dissipation: 40mW (Typ)
SPI/MICROWIRETM Compatible Serial I/O
Power Shutdown: Nap and Sleep
SINAD: 87dB (LTC1856)
Operates with Internal or External Reference
Internal Synchronized Clock
28-Pin SSOP Package
U
APPLICATIO S
Industrial Process Control
Multiplexed Data Acquisition Systems
High Speed Data Acquisition for PCs
Digital Signal Processing
LTC1854/LTC1855/LTC1856
8-Channel, ±10V Input
12-/14-/16-Bit, 100ksps ADC
Converters with Shutdown
DESCRIPTIO
The LTC®1854/LTC1855/LTC1856 are 8-channel, low
power, 12-/14-/16-bit, 100ksps, analog-to-digital con-
verters (ADCs). These ADCs operate from a single 5V
supply and the 8-channel multiplexer can be programmed
for single-ended inputs, pairs of differential inputs, or
combinations of both. In addition, all channels are fault
protected to ±30V. A fault condition on any channel will
not affect the conversion result of the selected channel.
An onboard precision reference minimizes external com-
ponents. Power dissipation is 40mW at 100ksps and lower
in two power shutdown modes (27.5mW in Nap mode and
40mW in Sleep mode.) DC specifications include ±3LSB
INL for the LTC1856, ±1.5LSB INL for the LTC1855 and
±1LSB for the LTC1854.
The internal clock is trimmed for 5ms maximum conver-
sion time and the sampling rate is guaranteed at 100ksps.
A separate convert start input and data ready signal (BUSY)
ease connections to FIFOs, DSPs and microprocessors.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
100kHz, 12-Bit/14-/16-Bit Sampling ADC
SOFTWARE-PROGRAMMABLE
SINGLE-ENDED OR
DIFFERENTIAL INPUTS
±10V BIPOLAR INPUT RANGE
COM
CONVST
CH0 LTC1854/ RD
CH1 LTC1855/ SCK
CH2 LTC1856 SDI
CH3 DGND
CH4 SDO
CH5 BUSY
CH6 OVDD
CH7
MUXOUT+
MUXOUT
DVDD
AVDD
AGND3
ADC+
AGND2
ADC
REFCOMP
AGND1
VREF
μP
CONTROL
LINES
0.1μF
10μF
10μF
0.1μF
10μF
1μF 10μF 0.1μF
3V TO 5V
5V
5V
0.1μF
2.5V
LTC1856 Typical INL Curve
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–32768 –16384
0
CODE
16384 32767
185456 G01
185456fa
1


Linear Technology Electronic Components Datasheet

LTC1855 Datasheet

100ksps ADC Converters

No Preview Available !

LTC1855 pdf
LTC1854/LTC1855/LTC1856
ABSOLUTE AXI U RATI GS
(Notes 1, 2)
Supply Voltage (OVDD = DVDD = AVDD = VDD) ........... 6V
Ground Voltage Difference
DGND, AGND1, AGND2, AGND3 ...................... ±0.3V
Analog Input Voltage
ADC+, ADC
(Note 3) ...................(AGND1 – 0.3V) to (AVDD + 0.3V)
CH0-CH7, COM .................................................. ±30V
Digital Input Voltage (Note 4) ...... (DGND – 0.3V) to 10V
Digital Output Voltage .... (DGND – 0.3V) to (DVDD + 0.3V)
Power Dissipation .............................................. 500mW
wwwO.DpaetraaSthinegetT4eUm.copmerature Range
LTC1854C/LTC1855C/LTC1856C ............ 0C to 70C
LTC1854I/LTC1855I/LTC1856I .......... – 40C to 85C
Storage Temperature Range ................. – 65C to 150C
Lead Temperature (Soldering, 10 sec) ................. 300C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
COM 1
CH0 2
CH1 3
CH2 4
CH3 5
CH4 6
CH5 7
CH6 8
CH7 9
MUXOUT+ 10
MUXOUT11
ADC+ 12
ADC13
AGND1 14
28 CONVST
27 RD
26 SCK
25 SDI
24 DGND
23 SDO
22 BUSY
21 OVDD
20 DVDD
19 AVDD
18 AGND3
17 AGND2
16 REFCOMP
15 VREF
G PACKAGE
28-LEAD PLASTIC SSOP
TJMAX = 110C, qJA = 95C/W
ORDER PART NUMBER
LTC1854CG
LTC1854IG
LTC1855CG
LTC1855IG
LTC1856CG
LTC1856IG
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
CO VERTER A D ULTIPLEXER CHARACTERISTICS
The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C.
MUXOUT connected to ADC inputs. (Notes 5, 6)
PARAMETER
Resolution
No Missing Codes
Transition Noise
Integral Linearity Error
Differential Linearity Error
Bipolar Zero Error
Bipolar Zero Error Drift
Bipolar Zero Error Match
Bipolar Full-Scale Error
Bipolar Full-Scale Error Drift
Bipolar Full-Scale Error Match
Input Common Mode Range
Input Common Mode Rejection Ratio
CONDITIONS
(Note 7)
(Note 8)
External Reference (Note 11)
Internal Reference (Note 11)
External Reference
Internal Reference
LTC1854
MIN TYP MAX
12
12
0.06
±1
–1 1
±5
±0.1
3
±0.34
±0.45
±2.5
±7
5
±10
96
LTC1855
MIN TYP MAX
14
14
0.25
±1.5
–1 1.5
±8
±0.1
4
±0.14
±0.40
±2.5
±7
10
±10
96
LTC1856
MIN TYP MAX UNITS
16 Bits
15 Bits
1 LSBRMS
±3 LSB
–2 4 LSB
±23 LSB
±0.1 ppm/C
10 LSB
±0.1 %
±0.4 %
±2.5 ppm/C
±7 ppm/C
15 LSB
±10 V
96 dB
185456fa
2


Part Number LTC1855
Description 100ksps ADC Converters
Maker Linear Technology
Total Page 24 Pages
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