LTM9012_15 Datasheet, PDF (4/28 Pages) Linear Technology – Quad 14-Bit, 125Msps ADC with Integrated Drivers

LTM9012
Internal Reference Characteristics The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T_A = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V_REF Output Voltage
V_REF Output Temperature Drift
V_REF Output Resistance
V_REF Line Regulation
I_OUT = 0
–400μA < I_OUT < 1mA
1.7V < V_DD < 1.9V
1.225
1.250
±25
7
0.6
1.275
V
ppm/°C
Ω
mV/V
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 6)
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 9)
Internally Set
Externally Set (Note 9)
ENC⁺, ENC^– to GND
(See Figure 3)
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
1.26
V
V_IL
Low Level Input Voltage
V_IN
Input Voltage Range
V_DD = 1.8V
ENC⁺ to GND
0.54
V
0 to 3.6
V
R_IN
Input Resistance
(See Figure 4)
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_OH
Logic Low Output Resistance to GND
I_OH
Logic High Output Leakage Current
C_OUT
Output Capacitance
Digital Input (SHDN)
V_DD = 1.8V, SDO = 0V
SDO = 0V to 3.6V
200
Ω
l –10
10
µA
3
pF
V_IH
High Level Input Voltage
V_IL
Low Level Input Voltage
R_SHDN
SHDN Pull-Up Resistor
Digital Data Outputs
V_CC = 3.3V
V_CC = 3.3V
V_SHDN = 0V to 0.5V
l
0.97 1.4
V
l 0.6
0.95
V
l 90
150
210
kΩ
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
9012f
4