ADBMS1818ASWZ-R7 datasheet(7/89 Pages) AD

7 / 89 page

Data Sheet

ADBMS1818

SPECIFICATIONS

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Rev. 0 | 7 of 89

Table 4.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

Watchdog or Discharge Timer (tSLEEP) (See Figure

87)

DTEN pin = 0 or DCTO, Bits[3:0] = 0000, apply over the full

specified temperature range

1.8

2.2

sec

DTEN pin = 1 and DCTO, Bits[3:0] ≠ 0000

0.5

120

min

Reference Wake-Up Time (tREFUP (See Figure

55)). Added to tCYCLE Time When Starting from

the Standby State. tREFUP = 0 When Starting from

Other States

tREFUP is independent of the number of channels measured and

the ADC mode, apply over the full specified temperature range

2.7

3.5

4.4

ADC Clock Frequency (fS)

3.3

MHz

SPI DC SPECIFICATIONS

Table 5.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

SPI Pin Digital Input Voltage High (VIH(SPI))

CSB, SCK, and SDI pins, apply over the full specified

temperature range

2.3

SPI Pin Digital Input Voltage Low （VIL(SPI))

CSB, SCK, and SDI pins, apply over the full specified

temperature range

0.8

Configuration Pin Digital Input Voltage High

(VIH(CFG))

ISOMD, DTEN, and GPIO1 to GPIO9 pins, apply over the full

specified temperature range

2.7

Configuration Pin Digital Input Voltage Low

(VIL(CFG))

ISOMD, DTEN, and GPIO1 to GPIO9 pins, apply over the full

specified temperature range

1.2

Digital Input Current (ILEAK(DIG))

CSB, SCK, SDI, ISOMD, and DTEN pins, apply over the full

specified temperature range

±1

μA

Digital Output Low (VOL(SDO))

SDO pin sinking 1 mA, apply over the full specified temperature

range

0.3

ISOSPI DC SPECIFICATIONS

See Figure 78.

Table 6.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

Voltage on IBIAS Pin (VBIAS)

Ready/active state, apply over the full specified temperature

range

1.9

2.0

2.1

Idle state

Isolated Interface Bias Current (IB)

RBIAS = 2 kΩ to 20 kΩ, apply over the full specified temperature

range

0.1

1.0

Isolated Interface Current Gain (AIB)

Transmitter pulse amplitude (VA) = ≤ 1.6 V, IB = 1 mA, apply

over the full specified temperature range

mA/mA

IB = 0.1 mA, apply over the full specified temperature range

24.5

mA/mA

Transmitter Pulse Amplitude (VA)

VA = IPx voltage (VIPx) – IMx voltage (VIMx), apply over the full

specified temperature range

1.6

Threshold-Setting Voltage on ICMP Pin (VICMP)

Receiver comparator threshold voltage (VTCMP) = receiver

comparator threshold voltage gain (ATCMP) × VICMP, apply over

the full specified temperature range

0.2

1.5

Input Leakage Current on ICMP Pin (ILEAK (ICMP))

VICMP = 0 V to VREG, apply over the full specified temperature

range

±1

µA

Leakage Current on IPx and IMx Pins (ILEAK (IPx/

IMx))

Idle state, VIPx or VIMx, 0 V to VREG, apply over the full specified

temperature range

±1

µA

Receiver Comparator Threshold Voltage Gain

(ATCMP)

Receiver common-mode bias (VCM) = VREG/2 to VREG – 0.2 V,

VICMP = 0.2 V to 1.5 V, apply over the full specified temperature

range

0.4

0.5

0.6

V/V

Receiver Common-Mode Bias (VCM)

IPx and IMx not driving

(VREG – VICMP/3 – 167 mV)

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