Datasheet

LTC1857/LTC1858/LTC1859
4
185789fa
DYNAMIC ACCURACY
SYMBOL PARAMETER CONDITIONS
LTC1857 LTC1858 LTC1859
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
S/(N + D) Signal-to-(Noise + Distortion) Ratio 1kHz Input Signal 74 83 87 dB
THD Total Harmonic Distortion 1kHz Input Signal,
First Five Harmonics
–101 –101 –101 dB
Peak Harmonic or Spurious Noise 1kHz Input Signal –103 –103 –103 dB
Channel-to-Channel Isolation 1kHz Input Signal –120 –120 –120 dB
–3dB Input Bandwidth 1 1 1 MHz
Aperture Delay –70 –70 –70 ns
Aperture Jitter 60 60 60 ps
Transient Response Full-Scale Step
(Note 9)
444μs
Overvoltage Recovery (Note 13) 150 150 150 ns
The l denotes the specifi cations which apply over the full operating temperature range,
otherwise specifi cations are at T
A
= 25°C. MUXOUT connected to ADC inputs. (Notes 5, 12)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
REF
Output Voltage I
OUT
= 0
l
2.475 2.5 2.525 V
V
REF
Output Temperature Coeffi cient I
OUT
= 0 ±10 ppm/°C
V
REF
Output Impedance –0.1mA ≤ I
OUT
≤ 0.1mA 8 kΩ
V
REFCOMP
Output Voltage I
OUT
= 0 4.096 V
INTERNAL REFERENCE CHARACTERISTICS
The l denotes the specifi cations which apply over the
full operating temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 5)
DIGITAL INPUTS AND DIGITAL OUTPUTS
The l 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
IH
High Level Input Voltage V
DD
= 5.25V
l
2.4 V
V
IL
Low Level Input Voltage V
DD
= 4.75V
l
0.8 V
I
IN
Digital Input Current V
IN
= 0V to V
DD
l
±10 μA
C
IN
Digital Input Capacitance 5pF
V
OH
High Level Output Voltage V
DD
= 4.75V, I
O
= –10μA, OV
DD
= V
DD
V
DD
= 4.75V, I
O
= –200μA, OV
DD
= V
DD
l
4
4.74 V
V
V
OL
Low Level Output Voltage V
DD
= 4.75V, I
O
= 160μA, OV
DD
= V
DD
V
DD
= 4.75V, I
O
= 1.6mA, OV
DD
= V
DD
l
0.05
0.10 0.4
V
V
I
OZ
Hi-Z Output Leakage V
OUT
= 0V to V
DD
, RD = High
l
±10 μA
C
OZ
Hi-Z Output Capacitance RD = High 15 pF
I
SOURCE
Output Source Current V
OUT
= 0V –10 mA
I
SINK
Output Sink Current V
OUT
= V
DD
10 mA
POWER REQUIREMENTS
The l denotes the specifi cations which apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C. (Note 5)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Positive Supply Voltage (Notes 9 and 10) 4.75 5 5.25 V
Positive Supply Current
Nap Mode
Sleep Mode CONVST = 0V or 5V
l
8
5.5
8
13
8
15
mA
mA
μA
Power Dissipation
Nap Mode
Sleep Mode CONVST = 0V or 5V
40
27.5
40
mW
mW
μW