(Internal bandgap reference selected and ADC_SCALE = ADC_REFSCL = 1 unless otherwise specified. Specifications marked GBD

are guaranteed by design and not production tested.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Resolution

10

Bits

ADC Clock Rate

0.1

8

MHz

ADC Clock Period

CLK

μs

Input Voltage Range

AIN0-AIN3, ADC_CHSEL = 0–3,

BUF_BYPASS = 0

0.05

V

AIN0–AIN1, ADC_CHSEL = 4–5,

BUF_BYPASS = 0

0.05

5.5

AIN0–AIN3, ADC_CHSEL = 0–3,

BUF_BYPASS = 1

AIN0-AIN1, ADC_CHSEL = 4-5,

BUF_BYPASS = 1

5.5

Input Dynamic Current,

Switched Capacitance

ADC active, ADC buffer bypassed

4.5

μA

ADC active, ADC buffer enabled

50

nA

Analog Input Capacitance

1

pF

Dynamically switched capacitance

250

nF

Integral Nonlinearity

INL

±2

LSB

Differential Nonlinearity

DNL

±1

LSB

Offset Error

±1

LSB

Gain Error

GE

±2

LSB

Signal-to-Noise Ratio

SNR

58.5

dB

Signal-to-Noise and Distortion

SINAD

58.5

dB

Total Harmonic Distortion

THD

-68.5

dB

Spurious Free Dynamic

Range

SFDR

74

dB

ADC Active Current

ADC active, reference buffer enabled,

input buffer disabled

240

µA

Input Buffer Active Current

53

μA

ADC Setup Time

Any power-up of ADC clock, ADC bias,

reference buffer or input buffer, to

CpuAdcStart

10

µs

Any power-up of ADC clock or ADC bias

to CpuAdcStart

48

tACLK

ADC Output Latency

1025

tACLK

ADC Sample Rate

7.8

ksps

ADC Input Leakage

AIN0 or AIN1, ADC inactive or channel

not selected

0.12

4

nA

AIN2 or AIN3, ADC inactive or channel

not selected

0.02

1

Electrical Characteristics - ADC

MAX32625/MAX32626

Ultra-Low Power, High-Performance

ARM Cortex-M4F Microcontroller for Wearables

www.maximintegrated.com

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