Datasheet

MAX11040K/MAX11060
24-/16-Bit, 4-Channel, Simultaneous-Sampling,
Cascadable, Sigma-Delta ADCs
3
Maxim Integrated
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Bandwidth -3dB 3.4 kHz
Latency (Note 8) 405 μs
Passband Flatness From DC to 1.4kHz < 0.1 dB
Amplitude-Dependent Phase Error FS vs. 0.1% FS < 0.01 0.12 Degrees
Channel-to-Channel Phase Matching 0.0001 Degrees
Phase-Error Drift 0.001 Degrees
Channel-to-Channel Isolation -130 dB
Common-Mode Rejection CMRR 109 dB
ANALOG INPUTS (AIN_+, AIN_-)
Differential FS Input Range V
IN
V
AIN_+
- V
AIN_-
-2.2 +2.2 V
Single-Ended Positive Input Range V
AIN_+
Referenced to AGND -2.2 +2.2 V
Single-Ended Negative Input Range V
AIN_-
Referenced to AGND -2.2 +2.2 V
Positive Fault Threshold V
PFT
V
AIN_+
or V
AIN_-
(Note 9) 2.25 2.65 V
Negative Fault Threshold V
NFT
V
AIN_+
or V
AIN_-
(Note 9) -2.65 -2.25 V
Fault Pin Response Time 2.5 μs
V
NFT
≤ V
IN
≤ V
PFT
130
Input Impedance Z
IN
V
IN
< V
NFT
or V
IN
> V
PFT
> 0.5
kΩ
DC Leakage Current I
IN
V
AIN_
+ = V
AIN_
- ±0.01 ±1 μA
Input Sampling Rate f
S
f
S
= f
XINCLOCK
/8 3.072 Msps
Input Sampling Capacitance 4.0 pF
INTERNAL REFERENCE
REFIO Output Voltage V
REF
T
A
= T
MAX
2.4 2.5 2.6 V
REFIO Output Resistance 1kΩ
REFIO Temp Drift 50 ppm/°C
REFIO Long-Term Stability 200
ppm/
1000hr
REFIO Output Noise 3μV
RMS
REFIO Power-Supply Rejection PSRR 75 dB
EXTERNAL REFERENCE
REFIO Input Voltage V
REF
2.3 2.7 V
REFIO Sink Current 200 μA
REFIO Source Current 200 μA
REFIO Input Capacitance 10 pF
CRYSTAL OSCILLATOR (XIN, XOUT)
Tested Resonant Frequency (Note 10) 24.576 MHz
Maximum Crystal ESR 30 Ω
Oscillator Startup Time < 2 ms
Oscillator Stability V
DVDD
= 3.3V, excluding crystal 10 ppm/°C
M axi m um O sci l l ator Load
10 pF
ELECTRICAL CHARACTERISTICS (continued)
(V
AV
DD
= +3.0V to +3.6V, V
DV
DD
= +2.7V to V
AV
DD
, f
XIN CLOCK
= 24.576MHz, f
OUT
= 16ksps, V
REFIO
= +2.5V (external), C
REFIO
=
C
REF0
= C
REF1
= C
REF2
= C
REF3
= 1μF to AGND, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)