ADATE305 datasheet(43/56 Pages) AD

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ADATE305

Rev. 0 | Page 43 of 56

DETAILS OF DACS vs. LEVELS

There are ten 14-bit DACs per channel. These DACs provide

levels for the driver, comparator, load currents, VHH buffer, OVD,

and clamp levels. There are three versions of output levels as

follows:

•

−2.5 V to +7.5 V and tracks DUTGND. Controls the VH,

VL, VT/VCOM/VHH, VOH, VOL, VCH, and VCL levels.

•

−3.0 V to +7.0 V and tracks DUTGND. Controls the

OVD levels.

•

−2.5 V to +7.5 V and does not track DUTGND. Controls

the IOH and IOL levels.

There is one 16-bit DAC per channel. This DAC provides the

levels for the PMU. The output level is as follows:

•

−2.5 V to +7.5 V and tracks DUTGND; controls the

PMU levels.

Table 32. Level Transfer Functions

DAC Transfer Function

Programmable Range1

(All 0s to All 1s)

Levels

VOUT = 2.0 × (VREF − VREF_GND) × (Code/(214)) – 0.5 × (VREF − VREF_GND) + VDUTGND

Code = [VOUT − VDUTGND + 0.5 × (VREF − VREF_GND)] × [(214)/(2.0 × (VREF − VREF_GND))]

−2.5 V to +7.5 V

VH, VL, VT/VCOM,

VOL, VOH, VCH, VCL

VOUT = 4.0 × (VREF − VREF_GND) × (Code/(214)) − 1.0 × (VREF − VREF_GND) + 2.0 + VDUTGND

Code = [VOUT − VDUTGND − 2.0 + 1.0 × (VREF − VREF_GND)] × [(214)/(4.0 × (VREF − VREF_GND))]

−3.0 V to +17.0 V

VHH

VOUT = 2.0 × (VREF − VREF_GND) × (Code/(214)) − 0.6 × (VREF − VREF_GND) + VDUTGND

Code = [VOUT − VDUTGND + 0.6 × (VREF − VREF_GND)] × [(214)/(2.0 × (VREF − VREF_GND))]

−3.0 V to +7.0 V

OVD

IOUT = [2.0 × (VREF − VREF_GND) × (Code/(214)) − 0.5 × (VREF − VREF_GND)] × (0.012/5.0)

Code = [(IOUT × (5.0/0.012)) + 0.5 × (VREF − VREF_GND)] × [(214)/(2.0 × (VREF − VREF_GND))]

−6 mA to +18 mA

IOH, IOL

VOUT = 2.0 × (VREF − VREF_GND) × (Code/(216)) – 0.5 × (VREF − VREF_GND) + VDUTGND

Code = [VOUT − VDUTGND + 0.5 × (VREF − VREF_GND)] × [(216)/(2.0 × (VREF − VREF_GND))]

−2.5 V to +7.5 V

PMUDAC

IOUT = [2.0 × (VREF − VREF_GND) × (Code/(216)) – 0.5 × (VREF − VREF_GND) − 2.5] × (0.050/5.0)

Code = [(IOUT × (5.0/0.050)) + 2.5 + 0.5 × (VREF − VREF_GND)] × [(216)/(2.0 × (VREF − VREF_GND))]

−50 mA to +50 mA

PMUDAC

(PMU FI Range A)

IOUT = [2.0 × (VREF − VREF_GND) × (Code/(216)) – 0.5 × (VREF − VREF_GND) − 2.5] × (0.004/5.0)

Code = [(IOUT × (5.0/0.004)) + 2.5 + 0.5 × (VREF − VREF_GND)] × [(216)/(2.0 × (VREF − VREF_GND))]

−4 mA to +4 mA

PMUDAC

(PMU FI Range B)

IOUT = [2.0 × (VREF − VREF_GND) × (Code/(216)) – 0.5 × (VREF − VREF_GND) − 2.5] × (0.0004/5.0)

Code = [(IOUT × (5.0/0.0004)) + 2.5 + 0.5 × (VREF − VREF_GND)] × [(216)/(2.0 × (VREF − VREF_GND))]

−400 μA to +400 μA

PMUDAC

(PMU FI Range C)

IOUT = [2.0 × (VREF − VREF_GND) × (Code/(216)) – 0.5 × (VREF − VREF_GND) − 2.5] × (0.00004/5.0)

Code = [(IOUT × (5.0/0.00004)) + 2.5 + 0.5 × (VREF − VREF_GND)] × [(216)/(2.0 × (VREF − VREF_GND))]

−40 μA to +40 μA

PMUDAC

(PMU FI Range D)

IOUT = [2.0 × (VREF − VREF_GND) × (Code/(216)) – 0.5 × (VREF − VREF_GND) − 2.5] × (0.000004/5.0)

Code = [(IOUT × (5.0/0.000004)) + 2.5 + 0.5 × (VREF − VREF_GND)] × [(216)/(2.0 × (VREF − VREF_GND))]

−4 μA to +4 μA

PMUDAC

(PMU FI Range E)

1 Programmable range includes a margin outside of the specified part performance, allowing for offset/gain calibration.

Table 33. Load Transfer Functions

Load Level

Transfer Function1

IOL

V(IOL)/5 V × 12 mA

IOH

V(IOH)/5 V × 12 mA

1 V(IOH), V(IOL) DAC levels are not referenced to DUTGND.

Table 34. PMU Transfer Functions

PMU Mode

Transfer Functions

Force Voltage

VOUT = PMUDAC

Measure Voltage

VMEASOUT01 = VDUTx (internal sense) or VMEASOUT01 = VPMUS_CHx (external sense)

Force Current

IOUT = [PMUDAC − (VREF/2)]/(R1 × 5)

Measure Current

VMEASOUT01 = (VREF/2) + VDUTGND + (IDUTx × 5 × R1)

1 R = 15.5 Ω for Range A; 250 Ω for Range B; 2.5 kΩ for Range C; 25 kΩ for Range D; 250 kΩ for Range E.

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