LTC1865L_15 Datasheet, PDF (1/16 Pages) Linear Technology – Power, 3V, 16-Bit, 150ksps 1- and 2-Channel ADCs in MSOP

FEATURES
■ _{16-Bit 150ksps ADCs in MSOP Package}
■ _{Single 3V Supply}
■ _{Low Supply Current: 450µA (Typ)}
■ _{Auto Shutdown Reduces Supply Current}
to 10µA at 1ksps
■ _{True Differential Inputs}
■ _{1-Channel (LTC1864L) or 2-Channel (LTC1865L)}
Versions
■ _{SPI/MICROWIRE}^TM _{Compatible Serial I/O}
■ _{16-Bit Upgrade to 12-Bit LTC1285/LTC1288}
■ _{Pin Compatible with 12-Bit LTC1860L/LTC1861L}
■ _{No Minimum Data Transfer Rate}
U
APPLICATIO S
■ _{High Speed Data Acquisition}
■ _{Portable or Compact Instrumentation}
■ _{Low Power Battery-Operated Instrumentation}
■ _{Isolated and/or Remote Data Acquisition}
LTC1864L/LTC1865L
µPower, 3V, 16-Bit, 150ksps
1- and 2-Channel ADCs in MSOP
DESCRIPTIO
The LTC^®1864L/LTC1865L are 16-bit A/D converters that
are offered in MSOP and SO-8 packages and operate on a
single 3V supply. At 150ksps, the supply current is only
450µA. The supply current drops at lower speeds because
the LTC1864L/LTC1865L automatically power down
between conversions. These 16-bit switched capacitor
successive approximation ADCs include sample-and-holds.
The LTC1864L has a differential analog input with an
external reference pin. The LTC1865L offers a software-
selectable 2-channel MUX and an external reference pin on
the MSOP version.
The 3-wire, serial I/O, small MSOP or SO-8 package and
extremely high sample rate-to-power ratio make these
ADCs ideal choices for compact, low power, high speed
systems.
These ADCs can be used in ratiometric applications or
with external references. The high impedance analog
inputs and the ability to operate with reduced spans down
to 1V full scale allow direct connection to signal sources
in many applications, eliminating the need for external
gain stages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
TYPICAL APPLICATIO
Single 3V Supply, 150ksps, 16-Bit Sampling ADC
1µF
3V
ANALOG INPUT
0V TO 3V
LTC1864L
1
V_REF
2 _IN+
8
V_CC
7
SCK
3 _IN–
6
SDO
4
GND
5
CONV
1864 TA01
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
Supply Current vs Sampling Frequency
1000
100
CONV LOW = 2µs
T_A = 25°C
V_CC = 2.7V
10
1
0.1
0.01
0.1
1
10 100
SAMPLING FREQUENCY (kHz)
1000
1864L/65L TA02
sn18645L 18645Lfs
1