LTC1863/LTC1867
12-/16-Bit, 8-Channel
200ksps ADCs
FEATURES
DESCRIPTION
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The LTC®1863/LTC1867 are pin-compatible, 8-channel
12-/16-bit A/D converters with serial I/O, and an internal
reference. The ADCs typically draw only 1.3mA from a
single 5V supply.
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Sample Rate: 200ksps
16-Bit No Missing Codes and ±2LSB Max INL
8-Channel Multiplexer with:
Single Ended or Differential Inputs and
Unipolar or Bipolar Conversion Modes
SPI/MICROWIRE™ Serial I/O
Signal-to-Noise Ratio: 89dB
Single 5V Operation
On-Chip or External Reference
Low Power: 1.3mA at 200ksps, 0.76mA at 100ksps
Sleep Mode
Automatic Nap Mode Between Conversions
16-Pin Narrow SSOP Package
APPLICATIONS
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The 8-channel input multiplexer can be configured for
either single-ended or differential inputs and unipolar
or bipolar conversions (or combinations thereof). The
automatic nap and sleep modes benefit power sensitive
applications.
The LTC1867’s DC performance is outstanding with a
±2LSB INL specification and no missing codes over temperature. The signal-to-noise ratio (SNR) for the LTC1867
is typically 89dB, with the internal reference.
Housed in a compact, narrow 16-pin SSOP package, the
LTC1863/LTC1867 can be used in space-sensitive as well
as low-power applications.
Industrial Process Control
High Speed Data Acquisition
Battery Operated Systems
Multiplexed Data Acquisition Systems
Imaging Systems
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
BLOCK DIAGRAM
Integral Nonlinearity vs Output Code
(LTC1867)
2.0
1
2
3
4
5
6
7
8
ANALOG
INPUT
MUX
LTC1863/LTC1867 16 V
15 DD
GND
14
SDI
13
12-/16-BIT
+
SDO
SERIAL
200ksps
12
PORT
–
SCK
ADC
11
CS/CONV
10
VREF
INTERNAL
2.5V REF
1.5
1.0
INL (LSB)
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7/COM
0.5
0
–0.5
–1.0
9
18637 BD
REFCOMP
–1.5
–2.0
0
16384
32768
49152
OUTPUT CODE
65536
18637 GO1
18637fa
1
