■ 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
■ Industrial Process Control
■ Multiplexed Data Acquisition Systems
■ High Speed Data Acquisition for PCs
■ Digital Signal Processing
8-Channel, ±10V Input
12-/14-/16-Bit, 100ksps ADC
Converters with Shutdown
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.
100kHz, 12-Bit/14-/16-Bit Sampling ADC
±10V BIPOLAR INPUT RANGE
CH0 LTC1854/ RD
CH1 LTC1855/ SCK
CH2 LTC1856 SDI
1μF 10μF 0.1μF
3V TO 5V
LTC1856 Typical INL Curve