MIC3000BML datasheet(53/68 Pages) MICREL

53 / 68 page

October 2004

M9999-101204

MIC3000

Micrel

Bit(s)

Function

Operation

D[7]

INV

Inverts the APC op-amp inputs. When set to “0”

0 = emitter follower (no inversion);

the BIAS DAC output is connected to the “+”

1 = common emitter (inverted); read/write;

input and FB is connected to the “–” input of the

non-volatile.

op amp. Set to “0” to use the ADC feedback loop.

D[6]

GAIN

Sets the feedback voltage range by changing the

1 = VREF/4 full scale;

APCDAC output swing; 0-VREF for optical

0 = VREF full scale; read/write ;non-volatile.

feedback, 0-VREF/4 for electrical feedback.

D[5]

BIASREF

Selects whether FB and VMPD are referenced to

1 = VDD; 0 = GND; read/write; non-volatile.

ground or VDD and selects feedback resistor

termination voltage (VDDA or GNDA).

D[4:2]

RFB[2:0]

Selects internal feedback resistance. (Resistors

000 = ×;

will be terminated to VDDA or GNDA according

001 = 800ý,

to BIASREF.)

010 = 1.6ký,

011 = 3.2ký,

100 = 6.4ký,

101 = 12.8ký,

110 = 25.6ký,

111 = 51.2ký;

read/write; non-volatile.

D[1]

SRCE

VBIAS source vs. sink drive.

1 = source (NPN),

0 = sink (PNP); read/write; non-volatile.

D[0]

SPOL

Polarity of shutdown output, SHDN, when active.

1 = high;

0 = low; read/write; non-volatile.

OEM Configuration Register 2 (OEMCFG2)

D[7]

D[6]

D[5]

D[4]

D[3]

D[2]

D[1]

D[0]

I2CADR[3]

I2CADR[2]

I2CADR[1]

I2CADR[0]

LUTOFF

read/write

Default Value

1010 xxxxb = xxh (slave address = 1010xxxb)

Serial Address

A6h = 1010011b

Byte Address

2 = 02h

CAUTION: Changes to I2CADR take effect immediately! Any accesses following a write to I2CADR must be to the

newly programmed serial bus address. A valid OEM password is required for access to this register. This register is

non-volatile and will be maintained through power and reset cycles.

Bit(s)

Function

Operation

D[7:4]

I2CADR[3:0]

Upper four MSBs of the serial bus slave address;

Read/write; non-volatile.

writes take effect immediately.

D[3:0]

LUTOFF

LUT offset. LUTOFF is added to the result of the

Read/write; non-volatile.

digital temperature sensor to derive the table

index; writes take effect after reset.

MIC3000BML Datasheet(PDF) 53 Page - Micrel Semiconductor

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