Datasheet
LTC1852/LTC1853
5
18523fa
POWER REQUIREMENTS
The ● denotes the specifi cations which apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
Analog Positive Supply Voltage (Note 10)
●
2.7 5.5 V
OV
DD
Output Positive Supply Voltage (Note 10)
●
2.7 5.5 V
I
DD
Positive Supply Current V
DD
= OV
DD
= 5V, f
S
= 400kHz
V
DD
= OV
DD
= 2.7V, f
S
= 250kHz
●
●
2
0.83
3
1.33
mA
mA
P
DISS
Power Dissipation V
DD
= OV
DD
= 5V, f
S
= 400kHz
V
DD
= OV
DD
= 2.7V, f
S
= 250kHz
●
●
10
2.25
15
4
mW
mW
I
DDPD
Power Down Positive Supply Current
Nap Mode
Sleep Mode
SHDN = Low, CS = Low
SHDN = Low, CS = High
0.5
20
mA
μA
Power Down Power Dissipation
Nap Mode
Sleep Mode
V
DD
= V
DD
= OV
DD
= 5V, f
S
= 400kHz
SHDN = Low, CS = Low
SHDN = Low, CS = High
2.5
0.1
mW
mW
Power Down Power Dissipation
Nap Mode
Sleep Mode
V
DD
= V
DD
= OV
DD
= 3V, f
S
= 250kHz
SHDN = Low, CS = Low
SHDN = Low, CS = High
1.5
0.06
mW
mW
TIMING CHARACTERISTICS
The ● denotes the specifi cations which apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
SAMPLE(MAX)
Maximum Sampling Frequency V
DD
= 5.5V
V
DD
= 2.7V
●
●
400
250
kHz
kHz
Acquisition + Conversion V
DD
= 5.5V
V
DD
= 2.7V
●
●
2.5
4.0
μs
μs
t
CONV
Conversion Time V
DD
= 5.5V
V
DD
= 2.7V
●
●
2.0
3.5
μs
μs
t
ACQ
Acquisition Time (Note 13)
●
150 ns
t
1
CS to RD Setup Time (Notes 9, 10)
●
0ns
t
2
CS to CONVST Setup Time (Notes 9, 10)
●
10 ns
t
3
CS to SHDN Setup Time (Notes 9, 10) 200 ns
t
4
SHDN to CONVST Wake-Up Time Nap Mode (Note 10)
Sleep Mode (Note 10)
200
10
ns
ms
t
5
CONVST Low Time (Notes 10, 11)
●
50 ns
t
6
CONVST to BUSY Delay C
L
= 25pF
●
10
60
ns
ns
t
7
Data Ready Before BUSY
●
20
15
35 ns
ns
t
8
Delay Between Conversions (Note 10)
●
50 ns
t
9
Wait Time RD After BUSY
●
–5 ns
t
10
Data Access Time After RD C
L
= 25pF
●
20 35
45
ns
ns
C
L
= 100pF
●
25 45
60
ns
ns
t
11
BUS Relinquish Time
0°C to 70°C
–40°C to 85°C
●
●
10 30
35
40
ns
ns
ns
t
12
RD Low Time
●
t
10
ns