LTC2373-16_15 Datasheet, PDF (1/50 Pages) Linear Technology – 16-Bit, 1Msps, 8-Channel SAR ADC with 96dB SNR

LTC2373-16
16-Bit, 1Msps, 8-Channel
SAR ADC with 96dB SNR
Features
n _{1Msps Throughput Rate}
n _{16-Bit Resolution with No Missing Codes}
n _{8-Channel Multiplexer with Selectable Input Range}
n _{Fully Differential (±4.096V)}
n _{Pseudo-Differential Unipolar (0V to 4.096V)}
n _{Pseudo-Differential Bipolar (±2.048V)}
n _{INL: ±1LSB (Maximum)}
n _{SNR: 96dB (Fully Differential)/93.4dB (Pseudo-}
Differential) (Typical) at f_IN = 1kHz
n _{THD: –110dB (Typical) at fIN = 1kHz}
n _{Programmable Sequencer}
n _{Selectable Digital Gain Compression}
n _{Single 5V Supply with 1.8V to 5V I/O Voltages}
n _{SPI-Compatible Serial I/O}
n _{Onboard 2.048V Reference and Reference Buffer}
n _{No Pipeline Delay, No Cycle Latency}
n _{Power Dissipation 40mW (Typical)}
n _{Guaranteed Operation to 125°C}
n _{32-Lead 5mm × 5mm QFN Package}
Applications
n _{Programmable Logic Controllers}
n _{Industrial Process Control}
n _{High Speed Data Acquisition}
n _{Portable or Compact Instrumentation}
n _ATE
Description
The LTC^®2373-16 is a low noise, high speed, 8-channel
16-bit successive approximation register (SAR) ADC. Oper-
ating from a single 5V supply, the LTC2373-16 has a highly
configurable, low crosstalk 8-channel input multiplexer,
supporting fully differential, pseudo-differential unipolar
and pseudo-differential bipolar analog input ranges. The
LTC2373-16 achieves ±1LSB INL (maximum) in all input
ranges, no missing codes at 16-bits and 96dB (fully dif-
ferential)/ 93.4dB (pseudo-differential) SNR (typical).
The LTC2373-16 has an onboard low drift (20ppm/°C max)
2.048V temperature-compensated reference and a single-
shot capable reference buffer. The LTC2373-16 also has a
high speed SPI-compatible serial interface that supports
1.8V, 2.5V, 3.3V and 5V logic through which a sequencer
with a depth of 16 may be programmed. An internal os-
cillator sets the conversion time, easing external timing
considerations. The LTC2373-16 dissipates only 40mW
and automatically naps between conversions, leading to
reduced power dissipation that scales with the sampling
rate. A sleep mode is also provided to reduce the power
consumption of the LTC2373-16 to 300μW for further
power savings during inactive periods.
L, LT, LTC, LTM, 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. Protected by U.S. Patents, including 7705765, 7961132, 8319673.
Typical Application
4.096V
0V
0V
4.096V
0V
4.096V
0V
4.096V
0V
2.048V
5V
10µF
2.2µF
1.8V TO 5V
0.1µF
+
10Ω
1200pF
CH0
V_DD
V_DDLBYP OV_DD
RESET
CH1
LTC2373-16
RDL
CH2
–
10Ω
1200pF
CH3 _MUX
CH4
CH5
CH6
CH7
COM
+
16-BIT
SAMPLING ADC
–
REFBUF REFIN GND
SDO
SCK
SDI
BUSY
CNV
SAMPLE
CLOCK
47µF 0.1µF
237316 TA01a
For more information www.linear.com/LTC2373-16
1.0
0.8
0.6
0.4
0.2
–0.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
Integral Nonlinearity
vs Output Code
FULLY DIFFERENTIAL
BIPOLAR
UNIPOLAR
16384 32768 49152 65536
OUTPUT CODE
237316 TA01b
237316f
1