Linear Technology DC1384A-A - LTC2452: 16-bit, SPI Differential Ultra-Tiny Delta Sigma ADC (req DC590) DC1384A-A DC1384A-A Ficha De Dados
Códigos do produto
DC1384A-A
LTC2452
1
2452fd
Typical applicaTion
FeaTures
applicaTions
DescripTion
Ultra-Tiny, Differential, 16-Bit
∆
Σ ADC with SPI Interface
The
is an ultra-tiny, fully differential, 16-bit,
analog-to-digital converter. The LTC2452 uses a single
2.7V to 5.5V supply and communicates through an SPI
interface. The ADC is available in an 8-pin, 3mm × 2mm
DFN package or TSOT-23 package. It includes an integrated
oscillator that does not require any external components.
It uses a delta-sigma modulator as a converter core and
has no latency for multiplexed applications. The LTC2452
includes a proprietary input sampling scheme that reduces
the average input sampling current several orders of
magnitude when compared to conventional delta-sigma
converters. Additionally, due to its architecture, there is
negligible current leakage between the input pins.
The LTC2452 can sample at 60 conversions per second,
The LTC2452 can sample at 60 conversions per second,
and due to the very large oversampling ratio, has extremely
relaxed anti-aliasing requirements. The LTC2452 includes
continuous internal offset and full-scale calibration algo-
rithms which are transparent to the user, ensuring accuracy
over time and over the operating temperature range. The
converter has an external REF pin and the differential input
voltage range can extend up to ±V
REF
.
Following a single conversion, the LTC2452 can automati-
cally enter a sleep mode and reduce its supply current to
less than 0.2µA. If the user reads the ADC once a second,
the LTC2452 consumes an average of less than 50µW
from a 2.7V supply.
Integral Nonlinearity, V
CC
= 3V
n
±V
CC
Differential Input Range
n
16-Bit Resolution (Including Sign), No Missing
Codes
n
2LSB Offset Error
n
4LSB Full-Scale Error
n
60 Conversions Per Second
n
Single Conversion Settling Time for Multiplexed
Applications
n
Single-Cycle Operation with Auto Shutdown
n
800µA Supply Current
n
0.2µA Sleep Current
n
Internal Oscillator—No External Components
Required
n
SPI Interface
n
Ultra-Tiny 3mm × 2mm DFN and TSOT-23 Packages
n
System Monitoring
n
Environmental Monitoring
n
Direct Temperature Measurements
n
Instrumentation
n
Industrial Process Control
n
Data Acquisition
n
Embedded ADC Upgrades
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and No
Latency ∆
Σ is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 6208279, 6411242,
7088280, 7164378.
DIFFERENTIAL INPUT VOLTAGE (V)
–3
INL (LSB)
1
3
2452 TA01b
–1
0
2
–2
–3
–1
–2
1
2
0
3
T
A
= –45°C, 25°C, 90°C
10k
10k
10k
R
CS
3-WIRE SPI
INTERFACE
SCK
SDO
SDO
0.1µF
0.1µF
10µF
2.7V TO 5.5V
0.1µF
IN
+
REF
V
CC
GND
IN
–
LTC2452
2452 TA01a