SMM665C

Summit Microelectronics, Inc

2125 3.2 5/24/2011

9

DC OPERATING CHARACTERISTICS (CONTINUED)

Symbol

Parameter

Notes

Min

Typ

Max

Unit

Minimum Output Valid Voltage

VDD_CAP voltage at which

the PUP, RST, HEALTHY

and FAULT outputs are valid

1

V

UVLO

UVLO (Under Voltage

Lockout) threshold (Note 4)

VDD_CAP rising

2.6

V

VDD_CAP falling

2.5

V

Maximum load on VDD_CAP,

Note 10

10

mA

AIN1/AIN2 ADC characteristics

N

Resolution

10

Bits

MC

Missing codes

Minimum resolution for which no

missing codes are guaranteed

10

Bits

S/N

Signal-to-noise Ratio

Conversion rate = 500Hz

72

dB

DNL

Differential non-linearity

-1/2

+1/2

LSB

INL

Integral non-linearity

Note 7

-1

+1

LSB

GAIN

Positive full scale gain error

Note 7

-0.5

±0.16

+0.5

%

OFFSET

Offset error

Note 7

-1

+1

LSB

ADC_TC

Full scale temperature

coefficient

±15

ppm/

Analog ADC Input Impedance

10

M

Ω

250

nA

200

pF

1

k

Ω

VMA-VMF, VDD ADC characteristics

N

Resolution

10

Bits

MC

Missing codes

Minimum resolution for which no

missing codes are guaranteed

10

Bits

S/N

Signal-to-noise Ratio

Conversion rate = 500Hz

72

dB

ERR_ADC

Total ADC Error

Total ADC Read Error

-4

+4

LSB

Analog ADC Input Impedance

VMA-VMF

100

K

Ω

12VIN ADC characteristics

N

Resolution

10

Bits

MC

Missing codes

Minimum resolution for which no

missing codes are guaranteed

10

Bits

S/N

Signal-to-noise Ratio

Conversion rate = 500Hz

72

dB

ERR_ADC

Total ADC Error

Total ADC Read Error

-4

+4

LSB

Note 1 – Range depends on internal regulator set to 3.6V or 5.5V see 12VIN specification.

Note 2 – See Application Note 37 which describes the type of capacitors to use to obtain minimum leakage.

Note 3 – All logic levels are with respect to the voltage on VDD_CAP, when supplied from VDD; VDD_CAP is equal to VDD, under no load.

Note 4 – (100mV typical Hysteresis)

Note 5 – Under certain operating conditions, self-heating could result in additional temperature sensor error.

Note 7 – The formula for the total ADC inaccuracy is: [((ADC read voltage) +/- INL)*(range of gain error)]+range of offset error

Note 8 – When temperature sensor is not used (determined by the hex file configuration setting) sensor accuracy is tested for typical values only.

Note 9 – The term “FAULT#” throughout this document describes a pin and output signal, whereas the term “fault” describes an operating

condition that may or may not activate the FAULT# pin. The FAULT# pin can only be activated by Ain1, Ain2 and Temperature fault conditions.

Note 10 – Guaranteed by Design and/or Characterization – not 100% tested in production.