LTC6946
4
6946fa
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VREF+ = VREF0+ = VD+ = VRF+ = 3.3V, VCP+ = VVCO+ = 5V unless otherwise
specified (Note 2). All voltages are with respect to GND.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Current vs Output Voltage
Sensitivity
(Note 5)
l
0.1
0.5
%/V
Output Current vs Temperature
VCP = VCP+/2
l
170
ppm/°C
Output Hi-Z Leakage Current
ICP = 700μA, CPCLO = CPCHI = 0 (Note 5)
ICP = 11.2mA, CPCLO = CPCHI = 0 (Note 5)
0.5
5
nA
VCLMP(LO)
Low Clamp Voltage
CPCLO = 1
0.84
V
VCLMP(HI)
High Clamp Voltage
CPCHI = 1, Referred to VCP+
–0.96
V
VMID
Mid-Supply Output Bias Ratio
Referred to (VCP+ – GND)
0.48
V/V
Reference (R) Divider
R
Divide Range
All Integers Included
l
1
1023
counts
VCO (N) Divider
N
Divide Range
All Integers Included
l
32
65535
counts
Digital Pin Specifications
VIH
High Level Input Voltage
MUTE, CS, SDI, SCLK
l
1.55
V
VIL
Low Level Input Voltage
MUTE, CS, SDI, SCLK
l
0.8
V
VIHYS
Input Voltage Hysteresis
MUTE, CS, SDI, SCLK
250
mV
Input Current
MUTE, CS, SDI, SCLK
l
±1
μA
IOH
High Level Output Current
SDO and STAT, VOH = VD+ – 400mV
l
1.4
2.3
mA
IOL
Low Level Output Current
SDO and STAT, VOL = 400mV
l
1.8
2.6
mA
SDO Hi-Z Current
l
±1
μA
Digital Timing Specifications (See Figures 7 and 8)
tCKH
SCLK High Time
l
25
ns
tCKL
SCLK Low Time
l
25
ns
tCSS
CS Setup Time
l
10
ns
tCSH
CS High Time
l
10
ns
tCS
SDI to SCLK Setup Time
l
6ns
tCH
SDI to SCLK Hold Time
l
6ns
tDO
SCLK to SDO Time
To VIH/VIL/Hi-Z with 30pF Load
l
16
ns
Power Supply Voltages
VREF+ Supply Range
l
3.15
3.3
3.45
V
VREFO+ Supply Range
l
3.15
3.3
3.45
V
VD+ Supply Range
l
3.15
3.3
3.45
V
VRF+ Supply Range
l
3.15
3.3
3.45
V
VVCO+ Supply Range
l
4.75
5.0
5.25
V
VCP+ Supply Range
l
4.0
5.25
V
Power Supply Currents
IDD
VD+ Supply Current
Digital Inputs at Supply Levels
l
250
μA
ICC(5V)
Sum VCP+, VVCO+ Supply Currents
ICP = 11.2mA
ICP = 1.0mA
PDALL = 1
l
49
27
405
61
37
660
mA
μA
ICC(REFO)
VREFO+ Supply Currents
REFO Enabled, RZ = ∞
l
7.8
9.0
mA