Datasheet

3
LTC1860L/LTC1861L
18601Lf
The ● denotes specifications which apply
over the full operating temperature range, otherwise specifications are T
A
= 25°C. V
CC
= 2.7V, V
REF
= 2.5V, unless otherwise noted.
T
A
= 25°C. V
CC
= 3V, V
REF
= 3V, f
SAMPLE
= 150kHz, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 72 dB
S/(N + D) Signal-to-Noise Plus Distortion Ratio 1kHz Input Signal 72 dB
THD Total Hamonic Distortion Up to 5th Harmonic 1kHz Input Signal 86 dB
Full Power Bandwidth 10 MHz
Full Linear Bandwidth S/(N + D) ≥ 68dB 30 kHz
DY A IC ACCURACY
UW
DIGITAL A D DC ELECTRICAL CHARACTERISTICS
U
The ● denotes specifications which apply over the
full operating temperature range, otherwise specifications are T
A
= 25°C.
RECO E DED OPERATI G CO DITIO S
UUUUWW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
CC
= 3.3V ● 1.9 V
V
IL
Low Level Input Voltage V
CC
= 2.7V ● 0.45 V
I
IH
High Level Input Current V
IN
= V
CC
● 2.5 µA
I
IL
Low Level Input Current V
IN
= 0V ● –2.5 µA
V
OH
High Level Output Voltage V
CC
= 2.7V, I
O
= 10µA ● 2.3 2.6 V
V
CC
= 2.7V, I
O
= 360µA ● 2.1 2.45 V
V
OL
Low Level Output Voltage V
CC
= 2.7V, I
O
= 400µA ● 0.3 V
I
OZ
Hi-Z Output Leakage CONV = V
CC
● ±3 µA
I
SOURCE
Output Source Current V
OUT
= 0V –6.5 mA
I
SINK
Output Sink Current V
OUT
= V
CC
6.5 mA
I
REF
Reference Current (LTC1860L SO-8, MSOP CONV = V
CC
● 0.001 3 µA
and LTC1861L MSOP) f
SMPL
= f
SMPL(MAX)
● 0.01 0.1 mA
I
CC
Supply Current CONV = V
CC
After Conversion ● 0.5 10 µA
f
SMPL
= f
SMPL(MAX)
● 0.45 1.0 mA
P
D
Power Dissipation f
SMPL
= f
SMPL(MAX)
1.22 mW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage 2.7 3.6 V
f
SCK
Clock Frequency ● DC 8 MHz
t
CYC
Total Cycle Time 12 • SCK + t
CONV
µs
t
SMPL
Analog Input Sampling Time (Note 5) LTC1860L 12 SCK
LTC1861L 10 SCK
t
suCONV
Setup Time CONV↓ Before First SCK↑, 60 ns
(See Figure 1)
t
hDI
Holdtime SDI After SCK↑ LTC1861L 30 ns
t
suDI
Setup Time SDI Stable Before SCK↑ LTC1861L 30 ns
t
WHCLK
SCK High Time f
SCK
= f
SCK(MAX)
45% 1/f
SCK
t
WLCLK
SCK Low Time f
SCK
= f
SCK(MAX)
45% 1/f
SCK
t
WHCONV
CONV High Time Between Data t
CONV
µs
Transfer Cycles
t
WLCONV
CONV Low Time During Data Transfer 12 SCK
t
hCONV
Hold Time CONV Low After Last SCK↑ 26 ns