ADUCM310 datasheet(7/28 Pages) AD

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ADuCM310

Data Sheet

Rev. B Page 6 of 27

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

ON-CHIP VOLTAGE REFERENCE

0.47 µF from VREF_1.2 to AGND

Output Voltage

2.505

Accuracy4

±5

TA = 25°C

Reference Temperature Coefficient2, 5

301

ppm/°C

Power Supply Rejection Ratio

Output Impedance

Ω

For ADC_CAPP, TA = 25°C

Internal VREF Power-On Time2

Turned on by default

EXTERNAL REFERENCE INPUT2

Input Voltage Range2

1.8

2.5

ADC maximum reference voltage =

2.5 V

Switching Time

External to Internal Reference

2.5

Internal to External Reference

BUFFERED VREF OUTPUTS

(BUF_VREF2.5x PINS)

Output Voltage

2.5

Accuracy

±5

TA = 25°C, load = 0.4 mA

Reference Temperature Coefficient2

301

ppm/°C

100 nF capacitor required on both

outputs

ppm/°C

Load Regulation

2.5

mV/mA

Output Impedance

Ω

TA = 25°C

Load Current

1.2

Power Supply Rejection Ratio

IDAC CHANNEL SPECIFICATIONS6, 7

Voltage Compliance Range2

Output voltage compliance;

minimum compliance if IDACx set to

full scale, see Figure 15 to Figure 20

IDAC0, IDAC1, and IDAC2

0.4

PVDD −

200 mV

PVDD –

275 mV

IDAC4 and IDAC5

0.4

PVDD –

200 mV

IDAC3

0.5

PVDD −

450 mV

−3.7

−3.0

At −3.5 V, maximum sink current is

80 mA; pin voltage clamped to

−3.5 V, tolerance of clamping

voltage is ±200 mV

Reference Current Generator

Reference Current

0.38

Using internal reference, 0.1%,

≤5 ppm, 3.16 kΩ external resistor

IDAC Reference Current Shutdown

Threshold

0.76

If the external resistor (REXT) value

drops below 1.580 kΩ, IDAC output

currents disable

Temperature Coefficient2, 5

ppm/°C

Using internal reference;

Over Heat Shutdown

135

°C

Junction temperature

Resolution

IDAC0, IDAC1, IDAC4,and IDAC5

Bits

11-bit MSBs and 5-bit LSBs are

guaranteed monotonic

IDAC2

Bits

11-bit MSBs and 5-bit LSBs are

guaranteed monotonic

IDAC3

Bits

0 V to 2 V compliant range, 11-bit

MSBs and 5-bit LSBs are guaranteed

monotonic

IDAC3

Bits

−4.5 V to 0 V compliant range

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