AD7840 データシートの表示（PDF） - Analog Devices

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AD7840

LC2MOS Complete 14-Bit DAC

Analog Devices 

AD7840–SPECIFICATIONS (VDD = +5 V ؎ 5%, VSS = –5 V ؎ 5%, AGND = DGND = O V, REF IN = +3 V, RL = 2 k⍀,

CL = 100 pF. All specifications TMIN to TMAX unless othewise noted.)

Parameter

J, A1 K, B1 S1

Units

Test Conditions/Comments

DYNAMIC PERFORMANCE2

Signal to Noise Ratio3 (SNR)

76

Total Harmonic Distortion (THD) –78

Peak Harmonic or Spurious Noise –78

DC ACCURACY

Resolution

14

Integral Nonlinearity

±2

Differential Nonlinearity

± 0.9

Bipolar Zero Error

± 10

Positive Full Scale Error5

± 10

Negative Full Scale Error5

± 10

REFERENCE OUTPUT6

REF OUT @ +25°C

2.99

3.01

REF OUT TC

± 60

Reference Load Change

(∆REF OUT vs. ∆I)

–1

78

–80

–80

14

±1

± 0.9

± 10

± 10

± 10

2.99

3.01

± 60

–1

76

–78

–78

14

±2

± 0.9

± 10

± 10

± 10

2.99

3.01

± 60

–1

dB min

dB max

dB max

Bits

LSB max

LSB max

LSB max

LSB max

LSB max

V min

V max

ppm/°C max

mV max

VOUT = 1 kHz Sine Wave, fSAMPLE = 100 kHz

Typically 82 dB at +25°C for 0 < VOUT < 20 kHz4

VOUT = 1 kHz Sine Wave, fSAMPLE = 100 kHz

Typically –84 dB at +25°C for 0 < VOUT < 20 kHz4

VOUT = 1 kHz Sine Wave, fSAMPLE = 100 kHz

Typically –84 dB at +25°C for 0 < VOUT < 20 kHz4

Guaranteed Monotonic

Reference Load Current Change (0–500 µA)

REFERENCE INPUT

Reference Input Range

Input Current

2.85 2.85 2.85 V min

3.15 3.15 3.15 V max

50 50 50 µA max

3 V ± 5%

LOGIC INPUTS

Input High Voltage, VINH

Input Low Voltage, VINL

Input Current, IIN

Input Current (CS Input Only)

Input Capacitance, CIN7

ANALOG OUTPUT

Output Voltage Range

DC Output Impedance

Short-Circuit Current

2.4 2.4 2.4 V min

0.8 0.8 0.8 V max

± 10 ± 10 ± 10 µA max

± 10 ± 10 ± 10 µA max

10 10 10 pF max

± 3 ± 3 ± 3 V nom

0.1 0.1 0.1 Ω typ

20 20 20 mA typ

VDD = 5 V ± 5%

VDD = 5 V ± 5%

VIN = 0 V to VDD

VIN =VSS to VDD

AC CHARACTERISTICS7

Voltage Output Settling Time

Settling Time to within ± 1/2 LSB of Final Value

Positive Full-Scale Change

4

4

4

µs max

Typically 2 µs

Negative Full-Scale Change

4

4

4

µs max

Typically 2.5 µs

Digital-to-Analog Glitch Impulse 10 10 10 nV secs typ

Digital Feedthrough

2

2

2

nV secs typ

POWER REQUIREMENTS

VDD

VSS

IDD

ISS

Power Dissipation

+5 +5 +5 V nom

–5 –5 –5 V nom

14 14 15 mA max

6

6

7

mA max

100 100 110 mW max

± 5% for Specified Performance

± 5% for Specified Performance

Output Unloaded, SCLK = +5 V. Typically 10 mA

Output Unloaded, SCLK = +5 V. Typically 4 mA

Typically 70 mW

NOTES

1Temperature ranges are as follows: J, K Versions, 0°C to +70°C; A, B Versions, –25°C to +85°C; S Version, –55°C to +125°C.

2VOUT (pk-pk) = ± 3 V

3SNR calculation includes distortion and noise components.

4Using external sample-and-hold (see Testing the AD7840).

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.

–2–

REV. B

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