LTC1863/LTC1867
12-/16-Bit, 8-Channel
200ksps ADCs
FEATURES
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DESCRIPTIO
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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
TM
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
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.
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 tem-
perature. 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corp.
APPLICATIO S
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Industrial Process Control
High Speed Data Acquisition
Battery Operated Systems
Multiplexed Data Acquisition Systems
Imaging Systems
BLOCK DIAGRA
1
2
3
4
5
6
7
8
Integral Nonlinearity vs Output Code
(LTC1867)
2.0
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7/COM
LTC1863/LTC1867 16 V
DD
15
GND
14
SDI
13
12-/16-BIT
+
SERIAL
SDO
200ksps
12
PORT
–
SCK
ADC
11
CS/CONV
10
V
REF
INTERNAL
2.5V REF
9
18637 BD
1.5
1.0
INL (LBS)
ANALOG
INPUT
MUX
0.5
0
– 0.5
– 1.0
REFCOMP
– 1.5
– 2.0
0
16384
32768
49152
OUTPUT CODE
65536
18637 GO1
U
18637f
W
U
1
LINER [ LINEAR TECHNOLOGY ]
