ADS8684IDBT datasheet(7/80 Pages) TI1

tên linh kiện	ADS8684IDBT

Giải thích chi tiết về linh kiện	4- and 8-Channel, Single-Supply, SAR ADCs

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ADS8684A, ADS8688A

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SBAS680 – JULY 2015

Electrical Characteristics (continued)

Minimum and maximum specifications are at TA = –40°C to 125°C. Typical specifications are at TA = 25°C.

AVDD = 5 V, DVDD = 3 V, VREF = 4.096 V (internal), and fSAMPLE = 500 kSPS, unless otherwise noted.

TEST

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

LEVEL(1)

SYSTEM PERFORMANCE

Resolution

16

Bits

A

NMC

No missing codes

16

Bits

A

DNL

Differential nonlinearity

–0.99

±0.5

1.5

LSB(3)

A

INL

Integral nonlinearity(4)

–2

±0.75

2

LSB

A

EG

Gain error

At TA = 25°C, all input ranges

±0.02

±0.05

%FSR(5)

A

Gain error matching

At TA = 25°C, all input ranges

±0.02

±0.05

%FSR

A

(channel-to-channel)

Gain error temperature drift

All input ranges

1

4

ppm/°C

B

At TA = 25°C,

±0.5

±1

A

input range = ±2.5 × VREF

(6)

At TA = 25°C,

±0.5

±1

A

input range = ±1.25 × VREF

At TA = 25°C,

±0.5

±1.5

A

input range = ±0.625 × VREF

EO

Offset error

mV

At TA = 25°C,

±0.5

±1.5

A

input range = ±0.3125 × VREF

At TA = 25°C,

±0.5

±1.5

A

input range = ±0.15625 × VREF

At TA = 25°C,

±0.5

±2

A

all unipolar input ranges

At TA = 25°C,

±0.5

±1

A

input range = ±2.5 × VREF

(6)

At TA = 25°C,

±0.5

±1

A

input range = ±1.25 × VREF

At TA = 25°C,

±0.5

±1.5

A

input range = ±0.625 × VREF

Offset error matching

mV

(channel-to-channel)

At TA = 25°C,

±0.5

±1.5

A

input range = ±0.3125 × VREF

At TA = 25°C,

±0.5

±1.5

A

input range = ±0.15625 × VREF

At TA = 25°C,

±0.5

±2

A

all unipolar input ranges

Input range = ±2.5 × VREF

1

3

B

Input range = ±1.25 × VREF

1

3

B

Input range = ±0.625 × VREF

1

3

B

Input range = ±0.3125 × VREF

2

6

B

Offset error temperature drift

Input range = ±0.15625 × VREF

4

12

ppm/°C

B

Input range = 0 to 2.5 × VREF

1

3

B

Input range = 0 to 1.25 × VREF

1

3

B

Input range = 0 to 0.625 × VREF

2

6

B

Input range = 0 to 0.3125 × VREF

4

12

B

SAMPLING DYNAMICS

tCONV

Conversion time

850

ns

A

tACQ

Acquisition time

1150

ns

A

Maximum throughput rate

fS

500

kSPS

A

without latency

(3)

LSB = least significant bit.

(4)

This parameter is the endpoint INL, not best-fit INL.

(5)

FSR = full-scale range.

(6)

Does not include the shift in offset over time.

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Product Folder Links: ADS8684A ADS8688A

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