AD7869 datasheet(3/16 Pages) AD

3 / 16 page

(VDD = +5 V

5%, VSS = –5 V

5%, AGND = DGND = 0 V, Rl DAC = +3 V and decoupled as shown in Figure 2,

VOUT Load to AGND; = 2 k , CL = 100 pF. All specifications TMIN to TMAX unless otherwise noted.)

DAC SECTION

Parameter

J Versions

A Version

Units

Test Conditions/Comments

DYNAMIC PERFORMANCE

Signal-to-Noise Ratio

3 (SNR) @ +25

°C 78

dB min

VOUT = 1 kHz Sine Wave, fSAMPLE = 83 kHz

TMIN to TMAX

dB min

Typically 82 dB at +25

°C for 0 < V

OUT < 20 kHz

Total Harmonic Distortion (THD)

–86

dB typ

VOUT = 1 kHz Sine Wave, fSAMPLE = 83 kHz

Typically –84 dB at +25

°C for 0 < V

OUT < 20 kHz

Peak Harmonic or Spurious Noise

–86

dB typ

VOUT = 1 kHz, fSAMPLE = 83 kHz

Typically –84 dB at +25

°C for 0 < V

OUT < 20 kHz

DC ACCURACY

Resolution

Bits

Integral Nonlinearity

± 2

LSB max

Differential Nonlinearity

± 1

LSB max

Guaranteed Monotonic

Bipolar Zero Error

±10

LSB max

Positive Full-Scale Error

±10

LSB max

Negative Full-Scale Error

±10

LSB max

REFERENCE OUTPUT

RO DAC @ +25

°C

2.99/3.01

V min/V max

RO DAC TC

±25

ppm/

°C typ

±40

ppm/

°C max

Reference Load Change

(

∆RO DAC vs. ∆I)

–1.5

mV max

Reference Load Current Change (0

µA–500 µA)

REFERENCE INPUT

RI DAC Input Range

2.85/3.15

V min/V max 3 V

± 5%

Input Current

µA max

LOGIC INPUTS

(

LDAC, TFS, TCLK, DT)

Input High Voltage, VINH

2.4

V min

VDD = 5 V ± 5%

Input Low Voltage, VINL

0.8

V max

VDD = 5 V ± 5%

Input Current, IIN

±10

µA max

VIN = 0 V to VDD

Input Capacitance, CIN

pF max

ANALOG OUTPUT

Output Voltage Range

± 3

V nom

DC Output Impedance

0.3

Ω typ

Short-Circuit Current

mA typ

AC CHARACTERISTICS

Voltage Output Settling-Time

Settling Time to Within

±1/2 LSB of Final Value

Positive Full-Scale Change

µs max

Typically 3

µs

Negative Full-Scale Change

µs max

Typically 3.5

µs

Digital-to-Analog Glitch Impulse

nV secs typ

DAC Code Change All 1s to All 0s

Digital Feedthrough

nV secs typ

VIN to VOUT Isolation

100

dB typ

VIN = ± 3 V, 41.5 kHz Sine Wave

POWER REQUIREMENTS

As per ADC Section

NOTES

1Temperature ranges are as follows: J Version, 0

°C to +70°C; A Version, –40°C to +85°C.

OUT (p-p) = ± 3 V.

3SNR calculation includes distortion and noise components.

4Using external sample and hold, see Figures 13 to 15.

5Measured with respect to REF IN and includes bipolar offset error.

6For capacitive loads greater than 50 pF a series resistor is required (see Internal Reference section).

7Sample tested @ +25

°C to ensure compliance.

Specifications subject to change without notice

AD7869

–3–

REV. A

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