MIC3002 Datasheet, PDF (53/65 Pages) Micrel Semiconductor – FOM Management IC with Internal Calibr ation

Micrel, Inc.
D[3]
D[2:0]
MODREF
VAUX[2:0]
and VBIAS.
Selects whether VMOD is
referenced to ground or VDD.
Selects the voltage reported in
VINh:VINl.
MIC3002
1 = VDD; 0 = GND; non-volatile.
000 = VIN; 001 = VDDA; 010 = VBIAS; 011 = VMOD;
100 = APCDAC; 101 = MODDAC; 110 = FLTDAC; non-
volatile
OEM Configuration Register 1 (OEMCFG1)
D[7]
INV
read/write
Default Value
D[6]
GAIN
read/write
D[5]
BIASREF
read/write
D[4]
RFB[2]
read/write
D[3]
RFB[1]
read/write
0000 0000b = 00h
D[2]
RFB[0]
read/write
D[1]
SRCE
read/write
D[0]
SPOL
read/write
Serial Address
A6h
Byte Address
1 = 01h
A write to OEMCFG1 will result in any A/D conversion in progress being aborted and the result discarded. The A/D will begin a
new conversion sequence once the write operation is complete. All bits in OEMCFG1 are non-volatile and will be maintained
through power and reset cycles. A valid OEM password is required for access to this register.
Bit(s)
D[7]
INV
D[6]
GAIN
D[5]
BIASREF
D[4:2]
RFB[2:0]
D[1]
SRCE
D[0]
SPOL
Function
Inverts the APC op-amp inputs.
When set to “0” the BIAS DAC
output is connected to the “+”input
and FB is connected to the “–” input
of the op amp. Set to “0” to use the
ADC feedback loop.
Sets the feedback voltage range by
changing the APCDAC output
swing; 0-V_REF for optical feedback,
0-V_REF/4 for electrical feedback.
Selects whether FB and VMPD are
referenced to ground or V_DD and
selects feedback resistor termination
voltage (V_DDA or GNDA).
Selects internal feedback resistance.
(Resistors will be terminated to V_DDA
or GNDA according to BIASREF.)
V_BIAS source vs. sink drive.
Polarity of shutdown output, SHDN,
when active.
Operation
0 = emitter follower (no inversion);
1 = common emitter (inverted); read/write; non-volatile.
1 = V_REF/4 full scale;
0 = V_REF full scale; read/write; non-volatile.
1 = V_DD; 0 = GND; read/write; non-volatile.
000 = ∞;
001 = 800Ω,
010 = 1.6kΩ,
011 = 3.2kΩ,
100 = 6.4kΩ,
101 = 12.8kΩ,
110 = 25.6kΩ,
111 = 51.2kΩ;
read/write; non-volatile.
1 = source (NPN),
0 = sink (PNP); read/write; non-volatile.
1 = high;
0 = low; read/write; non-volatile.
July 2007
53
M9999-073107-B
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