Linear Technology LTC1859CG, 8-Channel, 16-Bit, 100ksps SoftSpan ADC (req DC590) DC682A DC682A Ficha De Dados
Códigos do produto
DC682A
LTC1857/LTC1858/LTC1859
1
185789fa
100kHz, 12-Bit/14-Bit/16-Bit Sampling ADC
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
8-Channel, 12-/14-/16-Bit,
100ksps SoftSpan A/D
Converters with Shutdown
The LTC
®
1857/LTC1858/LTC1859 are 8-channel, low
power, 12-/14-/16-bit, 100ksps, analog-to-digital convert-
ers (ADCs). These SoftSpan™ ADCs can be software-
programmed for 0V to 5V, 0V to 10V, ±5V or ±10V input
spans and operate from a single 5V supply. The 8-channel
multiplexer can be programmed for single-ended inputs
or pairs of differential inputs or combinations of both. In
addition, all channels are fault protected to ±25V. A fault
condition on any channel will not affect the conversion
result of the selected channel.
ers (ADCs). These SoftSpan™ ADCs can be software-
programmed for 0V to 5V, 0V to 10V, ±5V or ±10V input
spans and operate from a single 5V supply. The 8-channel
multiplexer can be programmed for single-ended inputs
or pairs of differential inputs or combinations of both. In
addition, all channels are fault protected to ±25V. A fault
condition on any channel will not affect the conversion
result of the selected channel.
An onboard high performance sample-and-hold and pre-
cision reference minimize external components. The low
40mW power dissipation is made even more attractive with
two user selectable power shutdown modes. DC specifi ca-
tions include ±3LSB INL for the LTC1859, ±1.5LSB INL
for the LTC1858 and ±1LSB for the LTC1857.
cision reference minimize external components. The low
40mW power dissipation is made even more attractive with
two user selectable power shutdown modes. DC specifi ca-
tions include ±3LSB INL for the LTC1859, ±1.5LSB INL
for the LTC1858 and ±1LSB for the LTC1857.
The internal clock is trimmed for 5μs maximum conversion
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.
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.
n
Sample Rate: 100ksps
n
8-Channel Multiplexer with ±25V Protection
n
Single 5V Supply
n
Software-Programmable Input Ranges:
0V to 5V, 0V to 10V, ±5V or ±10V
Single Ended or Differential
Single Ended or Differential
n
±3LSB INL for the LTC1859, ±1.5LSB INL for the
LTC1858, ±1LSB INL for the LTC1857
n
Power Dissipation: 40mW (Typ)
n
SPI/MICROWIRE™ Compatible Serial I/O
n
Power Shutdown: Nap and Sleep
n
Signal-to-Noise Ratio: 87dB (Typ) for the LTC1859
n
Operates with Internal or External Reference
n
Internal Synchronized Clock
n
28-Pin SSOP Package
n
Industrial Process Control
n
Multiplexed Data Acquisition Systems
n
High Speed Data Acquisition for PCs
n
Digital Signal Processing
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. SoftSpan is
a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
LTC1859 Typical INL Curve
COM
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
MUXOUT
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
MUXOUT
+
MUXOUT
–
ADC
+
ADC
–
AGND1
CONVST
RD
SCK
SDI
DGND
SDO
BUSY
OV
DD
DV
DD
AV
DD
AGND3
AGND2
AGND2
REFCOMP
V
REF
LTC1857/
LTC1858/
LTC1858/
LTC1859
SOFTWARE-PROGRAMMABLE
SINGLE-ENDED OR
DIFFERENTIAL INPUTS
(0V TO 5V, 0V TO 10V,
±5V OR ±10V)
10μF
10μF
1μF
10μF
3V TO 5V
5V
5V
5V
2.5V
10μF
μP
CONTROL
LINES
CONTROL
LINES
CODE
–32768
INL (LSB)
0
0.5
1.0
0
1859 TA02
–0.5
–1.0
–2.0
–16384
16384
32767
–1.5
2.0
1.5