Datasheet
LTC2657
6
2657f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IL(CA)
Low Level Input Voltage (CA0 and CA2) See Test Circuit 1
l
0.15V
CC
V
V
IH(CA)
High Level Input Voltage (CA0 and CA2) See Test Circuit 1
l
0.85V
CC
V
R
INH
Resistance from CA
n
(n = 0,1, 2)
to V
CC
to Set CA
n
= V
CC
See Test Circuit 2
l
10 k
R
INL
Resistance from CA
n
(n = 0,1, 2)
to GND to Set CA
n
= GND
See Test Circuit 2
l
10 k
R
INF
Resistance from CA
n
(n = 0,1, 2)
to V
CC
or GND to Set CA
n
=FLOAT
See Test Circuit 2
l
2M
V
OL
Low Level Output Voltage Sink Current = 3mA
l
0 0.4 V
t
OF
Output Fall Time V
O
= V
IH(MIN)
to V
O
= V
IL(MAX)
,
C
B
= 10pF to 400pF (Note 13)
l
20+0.1C
B
250 ns
t
SP
Pulse Width of Spikes Suppressed by
Input Filter
l
050ns
I
IN
Input Leakage 0.1V
CC
≤ V
IN
≤ 0.9VCC
l
1µA
C
IN
I/O Pin Capacitance (Note 9)
l
10 pF
C
B
Capacitance Load for Each Bus Line
l
400 pF
C
CA
n
External Capacitive Load on Address
Pins CA0, CA1 and CA2
l
10 pF
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded unless otherwise specifi ed.
LTC2657B-L16/LTC2657-L12 (Internal Reference = 1.25V)
The
l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T
A
= 25°C.
V
CC
= 4.5V to 5.5V, V
OUT
unloaded unless otherwise specifi ed. LTC2657B-H16/LTC2657-H12 (Internal Reference = 2.048V)
SYMBOL PARAMETER CONDITIONS
LTC2657-12 LTC2657B-16
UNITSMIN TYP MAX MIN TYP MAX
DC Performance
Resolution
l
12 16 Bits
Monotonicity (Note 3)
l
12 16 Bits
DNL Differential Nonlinearity (Note 3)
l
±0.1 ±0.5 ±0.3 ±1 LSB
INL Integral Nonlinearity (Note 3) V
CC
= 5.5V, V
REF
= 2.5V
l
±0.5 ±1 ±2 ±4 LSB
Load Regulation V
CC
= 5V ±10%, Internal Reference,
Mid-Scale, –15mA ≤ I
OUT
≤ 15mA
l
0.04 0.125 0.6 2 LSB/mA
ZSE Zero-Scale Error
l
13 13 mV
V
OS
Offset Error (Note 4) V
REF
= 2.048V
l
±1 ±2 ±1 ±2 mV
V
OS
Temperature Coeffi cient 2 2 µV/°C
GE Gain Error
l
±0.02 ±0.1 ±0.02 ±0.1 %FSR
Gain Temperature Coeffi cient 1 1 ppm/°C