MAX1205 Datasheet, PDF (4/12 Pages) Maxim Integrated Products – +5v sINGLE-sUPPLY, 1mSPS, 14-bIT sELF-cALIBRATING adc

+5V Single-Supply, 1Msps, 14-Bit
Self-Calibrating ADC
TIMING CHARACTERISTICS
(AV_DD = +5V ±5%, DV_DD = DRV_DD = +3.3V, f_CLK = 2.048MHz, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are at
T_A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Conversion Time
Clock Period
Clock High Time
Clock Low Time
t_CONV
t_CLK
t_CH
t_CL
4 / f_SAMPLE
ns
488
ns
187
244
301
ns
187
244
301
ns
Acquisition Time
t_ACQ
t_CLK / 2
ns
Output Delay
DAV Pulse Width
CLK-to-DAV Rising Edge
Data Access Time
Bus Relinquish Time
t_OD
t_DAV
t_S
t_AC
t_REL
C_L = 20pF
70
150
ns
1 / f_CLK
ns
65
145
ns
16
75
ns
16
75
ns
Calibration Time
t_CAL
ST_CAL = 1, Figure 8
17,400
f_CLK
cycles
DIGITAL INPUTS AND OUTPUTS
(AV_DD = +5V ±5%, DV_DD = DRV_DD = +3.3V, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Low Voltage
V_IL
0.8
V
Input High Voltage
V_IH
DV_DD
- 0.8
V
Input Capacitance
CLK Input Low Voltage
CLK Input High Voltage
CLK_VIL
CLK_VIH
4
pF
0.8
V
AV_DD
- 0.8
V
CLK Input Capacitance
Digital Input Current
Clock Input Current
Output Low Voltage
Output High Voltage
C_CLK
I_{IN_}
I_CLK
V_OL
V_OH
V_{IN_} = 0 or DV_DD
I_SINK = 1.6mA
I_SOURCE = 200µA
9
pF
±0.1 ±10
µA
-10
±1
+10
µA
70
400
mV
DV_DD DV_DD
- 0.4 - 0.03
V
Three-State Leakage Current
I_LEAKAGE
Three-State Output Capacitance C_OUT
±0.1 ±10
µA
3.5
pF
Note 1: Reference inputs driven by operational amplifiers for Kelvin-sensed operation.
Note 2: For unipolar mode, the analog input voltage V_INP must be within 0V and V_REF, V_INN = V_REF / 2; where V_REF = V_RFPS - V_RFNS.
For differential mode, the analog inputs INP and INN must be within 0V and V_REF; where V_REF = V_RFPS - V_RFNS. The com-
mon mode of the inputs INP and INN is V_REF / 2.
Note 3: Minimum and maximum parameters are not tested. Guaranteed by design.
Note 4: R_I varies inversely with sample rate.
Note 5: Calibration remains valid for temperature changes within ±20°C and power-supply variations ±5%.
Note 6: All AC specifications are shown for the differential mode.
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