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AMC7812B

www.ti.com

SBAS625A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013

12-Bit Analog Monitoring and Control Solution

with Multichannel ADC, DACs, and Temperature Sensors

Check for Samples:

AMC7812B

FEATURES

DESCRIPTION

The AMC7812B is a complete analog monitoring and

control solution that includes a 16-channel, 12-bit,

analog-to-digital converter (ADC), twelve 12-bit

digital-to-analog converters (DACs), eight general-

purpose inputs and outputs (GPIOs), two remote

temperature sensor channels, and one local

temperature sensor channel.

The device has an internal +2.5-V reference that can

configure the DAC output voltage to a range of either

0 V to +5 V or 0 V to +12.5 V. An external reference

can be used as well. Typical power dissipation is

95 mW. The AMC7812B is ideal for multichannel

applications where board space, size, and low power

are critical.

The device is available in either a QFN-64 or HTQFP-

64 PowerPAD™ package and is fully specified from

–40°C to +105°C and operational over the full –40°C

to +125°C temperature range.

For applications that require a different channel

count, additional features, or converter resolutions,

Texas Instruments offers a complete family of analog

monitor and control (AMC) products. Refer to

www.ti.com/amc

for more information.

ADC-REF-IN/CMP

• 12, 12-Bit DACs with Programmable Outputs:

– 0 V to 5 V

– 0 V to 12.5 V

• DAC Shutdown to User-Defined Level

• 12-Bit, 500-kSPS ADC with 16 Inputs:

– 16 Single-Ended or

Two Differential + 12 Single-Ended

• Two Remote Temperature Sensors:

– ±2°C Accuracy, –40°C to +150°C

• One Internal Temperature Sensor:

– ±2.5°C Accuracy, –40°C to +125°C

• Input Out-of-Range Alarms

• 2.5-V Internal Reference

• Eight General-Purpose Inputs and Outputs

• Configurable I

C-Compatible and SPI™

Interface with 5-V and 3-V Logic

• Power-Down Mode

• Wide Operating Temperature Range:

–40°C to +125°C

• Small Packages: 9-mm × 9-mm QFN-64, and

10-mm × 10-mm HTQFP-64

2345

AMC7812B

Single-Ended/

Differential

APPLICATIONS

•

RF Power Amplifier Control in Base Stations

Test and Measurement

Industrial Control

General Analog Monitoring and Control

CH0

CH1

CH2

CH3

CH4

CH5

CH6

CH7

CH8

CH9

CH10

CH11

CH12

CH13

CH14

CH15

Reference

(2.5V)

REF-OUT

Single-Ended

REF-DAC

Trigger

ADC

DAC-0

DAC0-OUT

DAC1-OUT

DAC2-OUT

D1+

GPIO-5

Control/Limits/Status

Registers

DAC3-OUT

DAC4-OUT

DAC5-OUTDAC6-OUT

TEMP/GPIO

D1-

D2+

GPIO-4

GPIO-7

Remote

Temperature

Sensor

Driver

Local

Temperature

Sensor

DAC7-OUTDAC8-OUT

DAC9-OUTDAC10-OUT

DAC11-OUT

D2-

GPIO-6

GPIO Controller

DAC-11

GPIO

GPIO-3

GPIO-0

ALARM

LOAD-DAC

Out-of-Range

Alarms

DACs Clear Logic

DAC-CLR-0

DAC-CLR-1

RESET

Control

Logic

Serial Interface Register and Control

(SPI/I

DAV

SDO/A1

AGND1

CS/A0

DGND

DD1

SDI/SDA

AGND2

AGND3

SPI/I2C

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments, Incorporated.

SPI, QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

SCLK/SCL

AGND4

IOV

CNVT

DD2

AMC7812B

SBAS625A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013

www.ti.com

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more

susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

ORDERING INFORMATION

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or visit the

device product folder at

www.ti.com.

ABSOLUTE MAXIMUM RATINGS

(1)

Over operating free-air temperature range, unless otherwise noted.

VALUE

to GND

IOV

to GND

to DGND

Analog input voltage to GND

ALARM, GPIO-0, GPIO-1, GPIO-2, GPIO-3, SCLK/SCL, and SDI/SDA to GND

D1+/GPIO-4, D1–/GPIO-5, D2+/GPIO-6, D2–/GPIO-7 to GND

Digital input voltage to DGND

SDO and DAV to GND

Operating temperature range

Storage temperature range

Junction temperature range (T

max)

Electrostatic discharge (ESD)

ratings

(1)

Human body model (HBM)

Charged device model (CDM)

–0.3 to +6

–0.3 to +18

–0.3 to +6

–0.3 to AV

+ 0.3

–0.3 to +6

–0.3 to AV

+ 0.3

–0.3 to IOV

+ 0.3

–0.3 to IOV

+ 0.3

–40 to +125

–40 to +150

+150

2.5

1.0

UNIT

°C

Stresses above those listed under

Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to absolute

maximum conditions for extended periods may affect device reliability.

THERMAL INFORMATION

AMC7812B

THERMAL METRIC

JCtop

JCbot

(1)

RGC (QFN)

64 PINS

24.1

8.1

3.2

0.1

3.3

0.6

PAP (HTQFP)

64 PINS

33.7

9.5

9.0

0.3

8.9

0.2

UNITS

Junction-to-ambient thermal resistance

Junction-to-case (top) thermal resistance

Junction-to-board thermal resistance

Junction-to-top characterization parameter

Junction-to-board characterization parameter

Junction-to-case (bottom) thermal resistance

°C/W

For more information about traditional and new thermal metrics, see the

IC Package Thermal Metrics

application report,

SPRA953.

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Product Folder Links:

AMC7812B

AMC7812B

www.ti.com

SBAS625A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013

ELECTRICAL CHARACTERISTICS

At T

= –40°C to +105°C, AV

= DV

= 4.5 V to 5.5 V, AV

= +15 V, AGND = DGND = 0 V, IOV

= 2.7 V to 5.5 V,

internal 2.5-V reference, and the DAC output span = 0 V to 5 V, unless otherwise noted.

PARAMETER

DAC PERFORMANCE

DAC DC ACCURACY

Resolution

= –40°C to +105°C, measured by line passing

through codes 020h and FFFh

= –40°C to +125°C, measured by line passing

through codes 020h and FFFh

= –40°C to +125°C, measured by line passing

through codes 020h and FFFh

= +25°C, DAC output = 5.0 V

= +25°C, DAC output = 12.5 V

= +25°C, DAC output = 0 V to +5 V,

code 020h

= +25°C, DAC output = 0 V to +12.5 V,

code 020h

±1

= –40°C to +125°C, external reference,

output = 0 V to +5 V

= –40°C to +125°C, external reference,

output = 0 V to +12.5 V

±0.025

–0.15

±2

±0.15

±0.3

±1

±1.25

±1

±10

±30

±2

±5

Bits

LSB

LSBs

LSB

ppm/°C

%FSR

ppm/°C

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INL

Relative accuracy

DNL

TUE

Differential nonlinearity

Total unadjusted error

Offset error

Offset error temperature coefficient

Gain error

Gain temperature coefficient

DAC OUTPUT CHARACTERISTICS

Output voltage range

(1)

= –40°C to +125°C, V

REF

= 2.5 V, gain = 2

= –40°C to +125°C, V

REF

= 2.5 V, gain = 5

DAC output = 0 V to +5 V, code 400h to C00h,

to 1/2 LSB, from CS rising edge, R

= 2 kΩ,

= 200 pF

Full-scale current shorted to ground

Source within 200 mV of supply, T

= +25°C

Sink within 300 mV of supply, T

= +25°C

Load current

DAC output = 0 V to +5 V, code B33h. Source and

sink with voltage drop < 25 mV,

= –40°C to +95°C

= infinite

Code 800h

0 V to 5 V, 2-ms ramp

Code changes from 7FFh to 800h, 800h to 7FFh

Device is not accessed

= +25°C, at 1 kHz, code 800h, gain = 2,

excludes reference

f = 0.1 Hz to 10 Hz, excludes reference

DAC REFERENCE INPUT

Reference voltage input range

Input current

(2)

= –40°C to +125°C, REF-DAC pin

REF

= 2.5 V

(2)

1.5

12.5

µs

V/µs

Output voltage settling time

(2)

Slew rate

(2)

Short-circuit current

(2)

+10

–10

±8

0.3

0.15

Capacitive load stability

(2)

DC output impedance

Power-on overshoot

Digital-to-analog glitch energy

Digital feedthrough

Output noise

nV-s

nV/√Hz

µV

2.6

µA

170

(1)

(2)

The output voltage must not be greater than AV

. See the

DAC Output

section for further details.

Sampled during initial release to ensure compliance; not subject to production testing.

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AMC7812B

AMC7812B

SBAS625A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

At T

= –40°C to +105°C, AV

= DV

= 4.5 V to 5.5 V, AV

= +15 V, AGND = DGND = 0 V, IOV

= 2.7 V to 5.5 V,

internal 2.5-V reference, and the DAC output span = 0 V to 5 V, unless otherwise noted.

PARAMETER

INTERNAL REFERENCE

Output voltage

Output impedance

Reference temperature coefficient

Output current (sourcing and sinking)

Output voltage noise

ADC PERFORMANCE

ADC DC ACCURACY (for AV

= 5 V)

Resolution

INL

DNL

Integral nonlinearity

Differential nonlinearity

= –40°C to +125°C

±0.5

±1

Bits

LSB

= +25°C, f = 1 kHz

f = 0.1 Hz to 10 Hz

= –40°C to +125°C

= +25°C, REF-OUT pin

2.495

2.5

0.4

±5

260

2.505

ppm/°C

nV/√Hz

µV

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Single-Ended Mode

Offset error

Offset error match

Gain error

Gain error match

Differential Mode

External reference, 0 V to (2 × V

REF

) mode,

= 2.5 V

External reference, 0 V to V

REF

mode,

= 1.25 V

0 V to (2 × V

REF

) mode, V

= 2.5 V

Zero code error

Zero code error match

Common-mode rejection

SAMPLING DYNAMICS

Conversion rate

Conversion time

(3)

Autocycle update rate

Throughput rate

ANALOG INPUT

(4)

(3)

±1

±0.4

External reference

±1

±0.4

±3

LSB

±5

LSB

±2

±1

±0.5

±1

±0.5

±5

LSB

Gain error

Gain error match

±3

LSB

External reference, 0 V to V

REF

mode,

= 1.25 V

At dc, 0 V to (2 × V

REF

) mode

External single analog channel, auto mode

External single analog channel, direct mode

External single analog channel

All 16 single-ended inputs enabled

SPI clock, 12 MHz or greater, single channel

500

167

500

kSPS

µs

kSPS

= –40°C to +125°C, single-ended, 0 V to V

REF

= –40°C to +125°C, single-ended,

0 V to (2 × V

REF

)

Full-scale input voltage

= –40°C to +125°C, V

IN+

– V

IN–

, fully-differential,

0 V to V

REF

= –40°C to +125°C, V

IN+

– V

IN–

, fully-differential,

0 V to (2 × V

REF

)

Absolute input voltage

Input capacitance

(3)

DC input leakage current

ADC REFERENCE INPUT

Reference input voltage range

Input current

= –40°C to +125°C

REF

= 2.5 V

= –40°C to +125°C

0 V to V

REF

mode

0 V to (2 × V

REF

) mode

Unselected ADC input

–V

REF

–2 × V

REF

GND – 0.2

118

REF

2 × V

REF

2 × V

REF

+ 0.2

±10

µA

1.2

145

µA

(3)

(4)

Sampled during initial release to ensure compliance; not subject to production testing.

IN+

or V

IN–

must remain within GND – 0.2 V and AV

+ 0.2 V; see the

Analog Inputs

section.

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AMC7812B

AMC7812B

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SBAS625A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013

ELECTRICAL CHARACTERISTICS (continued)

At T

= –40°C to +105°C, AV

= DV

= 4.5 V to 5.5 V, AV

= +15 V, AGND = DGND = 0 V, IOV

= 2.7 V to 5.5 V,

internal 2.5-V reference, and the DAC output span = 0 V to 5 V, unless otherwise noted.

PARAMETER

INTERNAL ADC REFERENCE BUFFER

Offset

INTERNAL TEMPERATURE SENSOR

Operating range

Accuracy

Resolution

Conversion rate

= 5 V, T

= –40°C to +125°C

= 5 V, T

= 0°C to +100°C

Per LSB

External temperature sensors are disabled

0.125

–40

±1.25

+125

±2.5

±1.5

°C

= +25°C

±5

TEST CONDITIONS

MIN

TYP

MAX

UNIT

EXTERNAL TEMPERATURE SENSOR (Using 2N3906 external transistor)

Operating range

Limited by external diode

= 5 V, T

= 0°C to +100°C,

= –40°C to +150°C

= 5 V, T

= –40°C to +100°C,

= –40°C to +150°C

Per LSB

With resistance cancellation

(RC bit = '1')

Without resistance cancellation

(RC bit = '0')

0.125

100

–40

+150

±1.5

±2

°C

Accuracy

(5) (6)

Resolution

Conversion rate per sensor

DIGITAL LOGIC: GPIO

(7) (8)

and ALARM

Input high voltage

IOV

= +5 V

= –40°C to +125°C, IOV

= +3.3 V

IOV

= +5 V

= –40°C to +125°C, IOV

= +3.3 V

= –40°C to +125°C, IOV

= +5 V, sinking 5 mA

Output low voltage

High-impedance leakage

High-impedance output capacitance

DIGITAL LOGIC: All Except SCL, SDA, ALARM, and GPIO

Input high voltage

IOV

= +5 V

= –40°C to +125°C, IOV

= +3.3 V

IOV

= +5 V

= –40°C to +125°C, IOV

= +3.3 V

2.1

2.2

–0.3

0.3 + IOV

0.8

0.7

±1

IOV

= +5 V, sourcing 3 mA

IOV

= +3.3 V, sourcing 3 mA

IOV

= +5 V, sinking 3 mA

IOV

= +3.3 V, sinking 3 mA

4.8

2.9

0.4

±5

µA

= –40°C to +125°C, IOV

= +3.3 V,

sinking 2 mA

2.1

2.2

–0.3

0.3 + IOV

0.8

0.7

0.4

µA

Input low voltage

Input current

Input capacitance

Output high voltage

Output low voltage

High-impedance leakage

High-impedance output capacitance

(5)

(6)

(7)

(8)

is the external diode temperature.

Auto conversion mode disabled.

For pins GPIO0 to GPIO3, the external pull-up resistor must be connected to a voltage less than or equal to 5.5 V.

For pins GPIO4 to GPIO7, the external pull-up resistor must be connected to a voltage less than or equal to AV

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AMC7812B