MAX1196 Datasheet, PDF (6/23 Pages) Maxim Integrated Products – Dual 8-Bit, 40Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs

Dual 8-Bit, 40Msps, 3V, Low-Power ADC with
Internal Reference and Multiplexed Parallel Outputs
ELECTRICAL CHARACTERISTICS (continued)
(V_DD = OV_DD = 3V, 0.1µF and 2.2µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through a 10kΩ
resistor, V_IN = 2V_P-P (differential with respect to COM), C_L = 10pF at digital outputs (Note 5), f_CLK = 40MHz, T_A = T_MIN to T_MAX,
unless otherwise noted. ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization. Typical values
are at T_A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
CLK Pulse Width Low
t_CL
Clock period: 25ns (Note 7)
12.5
±1.5
ns
Wake-Up Time
t_WAKE
CHANNEL-TO-CHANNEL MATCHING
Crosstalk
Gain Matching
Phase Matching
Wake-up from sleep mode
Wake-up from shutdown mode (Note 8)
f_{INA or B} = 20MHz at -1dB FS (Note 9)
f_{INA or B} = 20MHz at -1dB FS (Note 10)
f_{INA or B} = 20MHz at -1dB FS (Note 11)
1
20
-72
0.05
±0.05
µs
dB
dB
D eg r ees
Note 1: Guaranteed by design. Not subject to production testing.
Note 2: Intermodulation distortion is the total power of the intermodulation products relative to the total input power.
Note 3: Analog attenuation is defined as the amount of attenuation of the fundamental bin from a converted FFT between two
applied input signals with the same magnitude (peak-to-peak) at f_IN1 and f_IN2.
Note 4: REFIN and REFOUT should be bypassed to GND with a 0.1µF (min) and 2.2µF (typ) capacitor.
Note 5: REFP, REFN, and COM should be bypassed to GND with a 0.1µF (min) and 2.2µF (typ) capacitor.
Note 6: Typical digital output current at f_INA&B = 20MHz. For digital output currents vs. analog input frequency, see the Typical
Operating Characteristics.
Note 7: See Figure 3 for detailed system timing diagrams. Clock to data valid timing is measured from 50% of the clock level to
50% of the data output level.
Note 8: SINAD settles to within 0.5dB of its typical value in unbuffered external reference mode.
Note 9: Crosstalk rejection is tested by applying a test tone to one channel and holding the other channel at DC level. Crosstalk is
measured by calculating the power ratio of the fundamental of each channel’s FFT.
Note 10:Amplitude matching is measured by applying the same signal to each channel and comparing the magnitude of the funda-
mental of the calculated FFT.
Note 11:Phase matching is measured by applying the same signal to each channel and comparing the phase of the fundamental of
the calculated FFT. The data from both ADC channels must be captured simultaneously during this test.
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