AD977ABR datasheet(2/24 Pages) AD

2 / 24 page

AD977/AD977A

–2–

REV. D

A Grade

B Grade

C Grade

Parameter

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Unit

RESOLUTION

Bits

ANALOG INPUT

Voltage Range

±10 V, 0 V to 5 V, . . . (See Table II)

Impedance

See Table II

Sampling Capacitance

THROUGHPUT SPEED

Complete Cycle

µs

Throughput Rate

100

kHz

DC ACCURACY

Integral Linearity Error

±3

±2.0

±3

LSB

Differential Linearity Error

–2

–1

+1.75

±2

LSB

No Missing Codes

Bits

Transition Noise

1.0

LSB

Full-Scale Error

3, 4

±0.5

±0.25

±0.5

Full-Scale Error Drift

±7

ppm/

°C

Full-Scale Error

Ext. REF = 2.5 V

±0.5

±0.25

±0.5

Full-Scale Error Drift

Ext. REF = 2.5 V

±2

ppm/

°C

Bipolar Zero Error

Bipolar Ranges

±10

±15

Bipolar Zero Error Drift

Bipolar Ranges

±2

ppm/

°C

Unipolar Zero Error

Unipolar Ranges

±10

Unipolar Zero Error Drift

Unipolar Ranges

±2

ppm/

°C

Recovery to Rated Accuracy

After Power-Down

2.2

µF to CAP

Power Supply Sensitivity

VANA = VDIG = VD = 5 V

± 5%

±8

LSB

AC ACCURACY

Spurious Free Dynamic Range

Total Harmonic Distortion

–90

–96

–90

Signal-to-(Noise+Distortion)

–60 dB Input

Signal-to-Noise

Full Power Bandwidth

700

kHz

–3 dB Input Bandwidth

1.5

MHz

SAMPLING DYNAMICS

Aperture Delay

Transient Response, Full-Scale Step

µs

Overvoltage Recovery

150

REFERENCE

Internal Reference Voltage

2.48

2.5

2.52

2.48

2.5

2.52

2.48

2.5

2.52

Internal Reference Source Current

µA

External Reference Voltage Range

for Specified Linearity

2.3

2.5

2.7

2.3

2.5

2.7

2.3

2.5

2.7

External Reference Current Drain

Ext. REF = 2.5 V

100

µA

NOTES

1LSB means Least Significant Bit. With a

±10 V input, one LSB is 305 µV.

2Typical rms noise at worst case transitions and temperatures.

3Measured with fixed resistors as shown in Figures 11, 12 and 13. Adjustable to zero. Tested at room temperature.

4Full-Scale Error is expressed as the % difference between the actual full-scale code transition voltage and the ideal full scale transition voltage, and includes the effect of offset

error. For bipolar input ranges, the Full-Scale Error is the worst case of either the –Full Scale or +Full Scale code transition voltage errors. For unipolar input ranges, Full-Scale

Error is with respect to the +Full-Scale code transition voltage.

5External 2.5 V reference connected to REF.

IN = 20 kHz, 0.5 dB down unless otherwise noted.

7All specifications in dB are referred to a full scale

±10 V input.

8Full-Power Bandwidth is defined as full-scale input frequency at which Signal-to-(Noise+Distortion) degrades to 60 dB, or 10 bits of accuracy.

9Recovers to specified performance after a 2

× F

S input overvoltage.

Specifications subject to change without notice.

AD977–SPECIFICATIONS (–40 C to +85 C, F

S = 100 kHz, VDIG = VANA = 5 V, unless otherwise noted)

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