Datasheet

MAX11359A
16-Bit Data-Acquisition System with ADC, DAC,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
11
Maxim Integrated
OUTPUT NOISE (µV
RMS
)
RATE (sps)
GAIN = 1 GAIN = 2 GAIN = 4 GAIN = 8
10 1.684 1.684 1.684 1.684
40 3.178 3.178 3.178 3.178
50 3.234 3.234 3.234 3.234
60 3.307 3.307 3.307 3.307
200 55.336 55.336 55.336 55.336
240 104.596 104.596 104.596 104.596
400 587.138 587.138 587.138 587.138
512 983.979 983.979 983.979 983.979
Table 1. Output Noise (Notes 12, 13, and 14)
Note 12: V
REF
= ±1.25V, bipolar mode, V
IN
= 1.24912V, PGA gain = 1, T
A
= +85°C.
Note 13: C
IN
= 5pF, op-amp noise is considered to be the same as the switching noise. The increase in the op amp’s noise contri-
bution is due to a large input swing (0 to 3.6V).
Note 14: Assume ±3 sigma peak-to-peak variation; noise-free resolution means no code flicker at given bits’ LSB.
PEAK-TO-PEAK RESOLUTION (Bits)
RATE (sps)
GAIN = 1 GAIN = 2 GAIN = 4 GAIN = 8
10 17.49 17.49 17.49 17.49
40 16.57 16.57 16.57 16.57
50 16.55 16.55 16.55 16.55
60 16.51 16.51 16.51 16.51
200 12.45 12.45 12.45 12.45
240 11.53 11.53 11.53 11.53
400 9.04 9.04 9.04 9.04
512 8.30 8.30 8.30 8.30
Table 2. Peak-to-Peak Resolution
EXTERNAL CAPACITANCE (pF)
PARAMETER
0 (Note 15) 50 100 500 1000 5000
Resistance (kΩ) 350 60 30 10 4 1
Table 3. Maximum External Source Impedance Without 16-Bit Gain Error
Note 15: 2pF parasitic capacitance is assumed, which represents pad and any other parasitic capacitance.