AD7293 datasheet(8/79 Pages) AD

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AD7293

Data Sheet

Rev. D | Page 8 of 79

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

Unipolar DAC Short-Circuit Current

Shorted to AGND or DACVDD-UNI

Bipolar DAC Short-Circuit Current

Shorted to AVSS or DACVDD-BI

Load Current2

−10

+10

Source and/or sink within 300 mV of supply

Capacitive Load Stability

RL = ∞

DC Output Impedance

Ω

Midscale

AC CHARACTERISTICS

Output Voltage Settling Time2

1.2

1.3

µs

¼ to ¾ change within ±1 LSB, measured from

the last SCLK rising edge, CL = 200 pF

Slew Rate2

7.5

V/µs

Digital Feedthrough2

0.1

nV-sec

DAC to DAC Crosstalk2, 3

0.2

nV-sec

Output Noise Spectral Density2, 3

nV/√Hz

fIN = 10 kHz, bipolar

110

nV/√Hz

fIN = 10 kHz, unipolar

Output Noise2, 3

102

µV p-p

Bipolar

135

µV p-p

Unipolar

CLAMP INPUTS

Controlled by SLEEP0 and SLEEP1 digital pins

Clamp Output Voltage2

−3 ×

VCLAMP0,

VCLAMP1

BI-VOUTx = −3 × VCLAMP0, VCLAMP1

Gain Error

0.2

Within 200 mV of AVSS

Input Referred Offset Error

VCLAMP0 and VCLAMP1 Input Current

±1

µA

Clamp Voltage Range

AVSS

Output Current2

−10

+10

Source and/or sink within 300 mV of supply

Clamp to Open-Loop Settling Time2

µs

RL = ∞, CL = 200 pF, output voltage within 10%,

5 V transition

Specification tested with output unloaded. Linearity calculated using best fit line method and based on a reduced code range equivalent to 100 mV within either side

of supply or ground ± 82 codes.

Guaranteed by design and characterization; not production tested.

All unipolar DACs must be enabled with an output code set to a minimum code of 41 LSBs.

TEMPERATURE SENSOR

AVDD, DVDD, DACVDD-BI = 4.5 V to 5.5 V (connect AVDD and DACVDD-BI to the same potential), DACVDD-UNI = 5 V, AVSS = −5 V, PAVDD =

5 V, AGND = DGND = 0 V, VREFIN = 2.5 V internal or external; VDRIVE = 1.7 V to 5.5 V; TA = −40°C to +125°C, unless otherwise noted.

Table 3.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

INTERNAL TEMPERATURE SENSOR1

Operating Range2

−40

+125

°C

See Figure 30 for −55°C to +125°C operation

Accuracy

±1.25

±3

°C

Internal temperature sensor, TA = −40°C to +125°C

±1.25

°C

TA = 25°C

Resolution

0.125

°C

EXTERNAL TEMPERATURE SENSOR1

External transistor = 2N3906; no capacitor between Dx−/Dx+ pins, and

no series resistor between transistor and Dx−/Dx+ pins

Operating Range

−55

+150

°C

Limited by external transistor

Accuracy

±1.1

±3

°C

TA = −40°C to +105°C

Resolution

0.125

°C

LSB size

Guaranteed by design and characterization; not production tested.

Guaranteed functional to −55°C by design but accuracy is not guaranteed.

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