AMC7820

SBAS231B

www.ti.com

3

ELECTRICAL CHARACTERISTICS (Cont.)

At –40

°C to +85°C, AV

DD, DVDD, BVDD = +5V, using external 2.5V reference, unless otherwise noted.

PARAMETER

CONDITION

MIN

TYP

MAX

UNITS

AMC7820

VOLTAGE REFERENCE (VREF)

Internal Reference Voltage

2.45

2.50

2.55

V

Internal Reference Drift(5)

0

°C to +85°C

±10

ppm/

°C

–40

°C to +85°C

±30

ppm/

°C

2.5V Output Impedance (pin 26)

0.5

Ω

2.5V Output Current (pin 26)

±1mA

Short-Circuit Current (pin 26)

±15

mA

External Reference Voltage Range (pin 27)

2.45

2.50

2.55

V

External Reference Input Resistance

10

k

Ω

External Reference Input Capacitance

5pF

OP AMP CHARACTERISTICS(6)

Input Offset Voltage

±0.5

±4mV

vs Temperature

±2

µV/°C

vs Power Supply

50

µV/V

Input Bias Current(7)

TA = +25°C

±2

±50

pA

TA = –40°C to +85°C

See Typical Characteristics

Input Offset Current(7)

TA = +25°C

±1

±50

pA

Input Voltage Noise

f = 0.1Hz to 10Hz

6

µVp-p

Input Voltage Noise Density

f = 1kHz

26

nV/

√Hz

Current Noise Density

f = 1kHz

0.6

fA/

√Hz

Common-Mode Voltage Range

–0.2

AVDD – 1.2

V

Common-Mode Rejection Ratio(8)

–0.2V < VCM < AVDD – 1.2V

74

90

dB

Open-Loop Gain(8)

RL = 25kΩ, 125mV < VO < AVDD – 125mV

100

120

dB

Gain-Bandwidth Product

G = 1

3

MHz

Slew Rate

G = 1

1.2

V/

µs

Settling Time: 0.1%

2V Step, CL = 100pF, G = 1, RL = 10kΩ

3

µs

Voltage Output Swing from Rail

RL = 25kΩ

40

mV

Closed-Loop Output Impedance

0.4

Ω

Output Current

See Typical Characteristics

±1mA

Short-Circuit Current

±18

mA

DIGITAL INPUT/OUTPUT

Logic Level:

VIH

BVDD = 5V, |IIH| ≤ 10µA

3.5

BVDD + 0.3

V

VIL

BVDD = 5V, |IIL| ≤ 10µA

0

0.8

V

VOH

BVDD = 5V, IOH = –3mA

4.0

BVDD

V

VOL

BVDD = 5V, IOL = 3mA

0

0.4

V

Logic Level:

VIH

BVDD = 3V, |IIH| ≤ 10µA

2.1

BVDD + 0.3

V

VIL

BVDD = 3V, |IIL| ≤ 10µA

0

0.6

V

VOH

BVDD = 3V, IOH = –3mA

2.4

BVDD

V

VOL

BVDD = 3V, IOL = 3mA

0

0.4

V

Input Capacitance

5pF

POWER-SUPPLY REQUIREMENTS

Power-Supply Voltage

AVDD, DVDD

Specified Performance

4.75

5

5.25

V

BVDD

Specified Performance

2.7

5.25

V

Quiescent Current of AVDD

812

mA

Quiescent Current of DVDD

0.3

0.75

mA

Quiescent Current of BVDD

0.01

0.1

mA

Power Dissipation

40

mW

TEMPERATURE RANGE

Specified Performance

–40

+85

°C

Storage

–65

+150

°C

NOTES: (1) For channels 2-5, fed into MUX directly. (2) LSB means Least Significant Bit. (3) DACs are tested without output load. (4) Measured from code 010

to FFF. (5) Internal reference voltage has been optimized for lowest drift from 0

°C to +85°C. (6) Applies to all amplifiers; see Figure 2. (7) Offset current will double

for each 10

°C of temperature increase. See Operational Amplifier section. (8) Ensured by design.