AXM0F243 datasheet(16/53 Pages) ONSEMI

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AXM0F243

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Table 16. SAR SPECIFICATIONS

A_DNL

Differential non linearity. VDD = 1.8 V to 3.6 V, 1 Msps

–1

–

LSB

VREF = 1.8 V to VDD

A_DNL

Differential non linearity. VDD = 1.8 V to 3.6 V, 500 ksps

–1

–

2.2

LSB

VREF = 1 V to VDD

A_THD

Total harmonic distortion

–

–65

Fin = 10 kHz

FSARINTRE F SAR operating speed without external ref. bypass

–

100

ksps

12−bit resolution

Table 17. CSD AND IDAC SPECIFICATIONS

Parameter

Description

Min

Typ

Max

Units

Details / Conditions

VDD_RIPPLE

Max allowed ripple on power supply, DC to 10

MHz

–

±50

VDD > 2 V (with ripple),

25°C TA, Sensitivity =

0.1 pF

VDD_RIPPLE_1.8 Max allowed ripple on power supply, DC to 10

MHz

–

±25

VDD > 1.75 V (with ripple),

25°C TA, Parasitic Capaci−

tance (CP) < 20 pF, Sensi-

tivity ≥ 0.4 pF

ICSD

Maximum block current

–

4000

Maximum block current for

both IDACs in dynamic

(switching) mode including

comparators, buffer, and

reference generator.

VREF

Voltage reference for CSD and Comparator

0.6

1.2

VDDD − 0.6

VDDD − 0.06 or 4.4,

whichever is lower

VREF_EXT

External Voltage reference for CSD and Com-

parator

0.6

VDDD − 0.6

VDDD − 0.06 or 4.4,

whichever is lower

IDAC1IDD

IDAC1 (7−bits) block current

–

1750

IDAC2IDD

IDAC2 (7−bits) block current

–

1750

VCSD

Voltage range of operation

1.8

–

3.6

VCOMPIDAC

Voltage compliance range of IDAC

0.6

–

VDDD –0.6

VDDD − 0.06 or 4.4,

whichever is lower

IDAC1DNL

DNL

–1

–

LSB

IDAC1INL

INL

–2

–

LSB

INL is ±5.5 LSB for VDDD

< 2 V

IDAC2DNL

DNL

–1

–

LSB

IDAC2INL

INL

–2

–

LSB

INL is ±5.5 LSB for VDDD

< 2 V

SNR

Ratio of counts of finger to noise. Guaranteed by

characterization

–

Ratio

Capacitance range of 5 to

35 pF, 0.1−pF sensitivity.

All use cases. VDDD > 2 V.

IDAC1CRT1

Output current of IDAC1 (7 bits) in low range

4.2

–

5.4

LSB = 37.5−nA typ.

IDAC1CRT2

Output current of IDAC1(7 bits) in medium range

–

LSB = 300−nA typ.

IDAC1CRT3

Output current of IDAC1(7 bits) in high range

275

–

330

LSB = 2.4−mA typ.

IDAC1CRT12

Output current of IDAC1 (7 bits) in low range, 2X

mode

–

10.5

LSB = 75−nA typ.

IDAC1CRT22

Output current of IDAC1(7 bits) in medium

range, 2X mode

–

LSB = 600−nA typ.

IDAC1CRT32

Output current of IDAC1(7 bits) in high range,

2X mode

540

–

660

LSB = 4.8−mA typ.

IDAC2CRT1

Output current of IDAC2 (7 bits) in low range

4.2

–

5.4

LSB = 37.5−nA typ.

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