LTC2170-12_15 Datasheet, PDF (5/34 Pages) Linear Technology – 12-Bit, 65Msps/40Msps/ 25Msps Low Power Quad ADCs

LTC2172-12/
LTC2171-12/LTC2170-12
Digital Inputs And Outputs The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. (Note 5)
SYMBOL PARAMETER
ENCODE INPUTS (ENC⁺, ENC^– )
Differential Encode Mode (ENC^– Not Tied to GND)
CONDITIONS
MIN
TYP
MAX UNITS
V_ID
Differential Input Voltage
V_ICM
Common Mode Input Voltage
V_IN
Input Voltage Range
R_IN
Input Resistance
C_IN
Input Capacitance
Single-Ended Encode Mode (ENC^– Tied to GND)
(Note 8)
Internally Set
Externally Set (Note 8)
ENC⁺, ENC^– to GND
(See Figure 10)
l
0.2
V
1.2
V
l
1.1
1.6
V
l
0.2
3.6
V
10
kΩ
3.5
pF
V_IH
High Level Input Voltage
V_DD = 1.8V
l
1.2
V
V_IL
Low Level Input Voltage
V_IN
Input Voltage Range
V_DD = 1.8V
ENC⁺ to GND
l
l
0
0.6
V
3.6
V
R_IN
Input Resistance
(See Figure 11)
30
kΩ
C_IN
Input Capacitance
3.5
pF
DIGITAL INPUTS (CS, SDI, SCK in Serial or Parallel Programming Mode. SDO in Parallel Programming Mode)
V_IH
High Level Input Voltage
V_DD = 1.8V
l
1.3
V
V_IL
Low Level Input Voltage
V_DD = 1.8V
l
0.6
V
I_IN
Input Current
V_IN = 0V to 3.6V
l
–10
10
µA
C_IN
Input Capacitance
3
pF
SDO OUTPUT (Serial Programming Mode. Open-Drain Output. Requires 2k Pull-Up Resistor if SDO Is Used)
R_OL
Logic Low Output Resistance to GND
I_OH
Logic High Output Leakage Current
C_OUT
Output Capacitance
DIGITAL DATA OUTPUTS
V_DD = 1.8V, SDO = 0V
SDO = 0V to 3.6V
200
Ω
l
–10
10
µA
3
pF
V_OD
Differential Output Voltage
100Ω Differential Load, 3.5mA Mode
l
247
350
454
mV
100Ω Differential Load, 1.75mA Mode
l
125
175
250
mV
V_OS
Common Mode Output Voltage
100Ω Differential Load, 3.5mA Mode
l 1.125
1.250
1.375
V
100Ω Differential Load, 1.75mA Mode
l 1.125
1.250
1.375
V
R_TERM On-Chip Termination Resistance
Termination Enabled, OV_DD = 1.8V
100
Ω
21721012fb
5