MAX11902 Datasheet, PDF (5/29 Pages) Maxim Integrated Products – Fully Differential SAR ADC

MAX11902
18-Bit, 1Msps, Low-Power,
Fully Differential SAR ADC
Electrical Characteristics (continued)
(f_SAMPLE = 1Msps, V_AVDD = 1.8V, V_DVDD = 1.8V, V_OVDD = 1.5V to 3.6V, V_REFVDD = 3.6V, V_REF = 3.3V, Internal Ref Buffers On, T_A
= T_MIN to T_MAX, unless otherwise noted. Typical values are at T_A = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
Differential Nonlinearity
(Note 6)
DNL
-0.5
±0.25 +0.5
LSB
Analog Input CMR
Power-Supply Rejection
(Note 7)
Power-Supply Rejection
(Note 7)
CMR
PSR
DC
PSR vs. AVDD
PSR PSR vs. REFVDD
5
LSB/V
0.6
LSB/V
1
LSB/V
Transition Noise
EXTERNAL REFERENCE
REF Voltage Input Range
Load Current
REF Input Capacitance
REFERENCE BUFFER
V_REF
I_REF
1Msps, V_REF = 3.3V
0.99
LSB_RMS
2.5
3.3
3.6
V
350
µA
1
nF
REFIN Input Voltage Range
V_REFIN V_REF < (V_REFVDD - 200mV)
2.5
3
V_REFVDD -
200mV
V
REFIN Input Current
Turn-On Settling Time
I_REFIN
External Compensation
Capacitor
C_EXT
DYNAMIC PERFORMANCE (Note 8)
Dynamic Range
Signal-to-Noise Ratio
SNR
Signal-to-Noise Plus Distortion SINAD
Spurious-Free Dynamic Range
Total Harmonic Distortion
Total Harmonic Distortion
Total Harmonic Distortion
SAMPLING DYNAMICS
Throughput
SFDR
THD
THD
THD
Full-Power Bandwidth
Acquisition Time
t_ACQ
Aperture Delay
C_EXT = 10µF on REF pin,
C_REFIN = 0.1µF on REFIN pin
REF pins
Internal RefBuffer, -60dBFS input
Internal RefBuffer, f_IN = 10kHz
Internal RefBuffer, f_IN = 10kHz,
-0.1dBFs
Internal RefBuffer, f_IN = 10kHz
Internal RefBuffer, f_IN = 10kHz
Internal RefBuffer, f_IN = 100kHz
Internal RefBuffer, f_IN = 250kHz
-3dB point
-0.1dB point
Time delay from CNVST rising edge
to time at which sample is taken for
conversion
1
nA
20
ms
4.7
10
µF
99.4
dB
97.7
98.9
dB
97.6
98.8
dB
125
dB
-123
dB
-115
dB
-107
dB
0
20
3
150
1
1
Msps
MHz
ns
ns
Aperture Jitter
3
ps_RMS
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