TI AMC60804：12位高精度电流与电压输出D/A转换器及多通道ADC模块详解

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TI-AMC60804是一款高度集成的模拟信号处理芯片，专为需要高精度电流和电压输出以及多通道监测的应用设计。它具备以下几个关键特性： 1. **电流输出DAC (IDACs)**: 该芯片拥有四个12位的IDAC，每个IDAC的最大输出电流可达150毫安，可提供全范围的电流控制。这在设计需要精确电流调节的光学模块或直流内部连接（metro）系统中非常有用。 2. **电压输出DAC (VDACs)**: VDACs提供了四种不同的输出范围选择：-5V、-2.5V、+2.5V和+5V，具有高电流驱动能力，支持±50毫安。这对于需要多种电压输出的系统来说非常灵活。 3. **多通道ADC (Analog-to-Digital Converter)**: AMC60804内置一个12位、1 MSPS的SAR型ADC，可以处理12个通道的数据，其中包括两个外部输入范围，分别为2.5V和5V。此外，它还包含四个IDAC电压监测通道和四个VDAC电流监测通道，便于实时监控和诊断。 4. **高级功能**: 芯片集成了可编程序列器，用于数据采集和控制流程管理；具备程序化的出界报警功能，当信号超出预设范围时能自动触发警报。另外，它还内置了一个2.5V参考电压源，并支持电源和温度故障报警，确保系统的稳定运行。 5. **接口选项**: 提供了SPI和I2C通信接口，工作电压范围宽广，从1.7V到3.6V，其中SPI接口是四线制，I2C支持四个从设备地址，方便与外部设备进行数据交换。 6. **温度范围**: 设计的规格适应恶劣的工作环境，能够在-40°C到+125°C的温度范围内正常运行。这款芯片适用于那些需要高精度模拟信号处理、多通道监测以及简单控制功能的场景，如光电转换模块中的电流和电压控制，或者在系统内部进行高效数据传输和监控的场合。通过其丰富的特性，AMC60804能够简化电路设计，提高系统性能，并且降低总体成本。

AMC60804 4-Channel, EML Monitor and Controller

With Current and Voltage Output DACs and Multichannel ADC

1 Features

• Four 12-bit current output DACs (IDACs)

– 150-mA full-scale output range

• Four 12-bit voltage output DACs (VDACs)

– Selectable full-scale output ranges:

–5 V, –2.5 V, +2.5 V and +5 V

– High-current drive capability: ±50 mA

• Twelve channel, 12-bit, 1-MSPS SAR ADC

– Four external inputs: 2.5-V and 5-V input

ranges

– Four IDAC voltage monitor channels

– Four VDAC current monitor channels

– Programmable sequencer

– Programmable out-of-range alarms

• Internal 2.5-V reference

• Suppy and temperature fault alarms

• SPI and I

C interfaces: 1.7-V to 3.6-V operation

– SPI: 4-wire interface

– I

C: Four slave addresses

• Specified temperature range: –40°C to +125°C

2 Applications

• Optical module

• Intra-dc interconnect (metro)

IDAC

ADC MUX

Reference

2.5 V

C / SPI

Serial Interface

AMC60804

IDAC1

Supply and Temperature Monitors

Interrupt Control

and

Alarm Detector

IDAC Channels 1 - 4

Voltage

Monitors

IDAC2

IDAC3

IDAC4

VDAC

VDAC1

VDAC Channels 1 - 4

Current

Monitors

VDAC2

VDAC3

VDAC4

ADC1

ADC2

ADC3

ADC4

Simplified Schematic

3 Description

The AMC60804 is a highly integrated, low-power

analog monitor and controller optimized for electro-

absorption modulated lasers (EML).

The AMC60804 includes four 12-bit current output

digital-to-analog converters (IDACs) and four 12-bit

voltage output DACs (VDACs) with programmable

output ranges. The AMC60804 also includes a 12-bit,

1-MSPS analog-to-digital converter (ADC) used for

external signal and internal signal monitoring, supply

and temperature alarm monitors, and a high-precision

internal reference.

The AMC60804 VDACs support both positive and

negative output range operation and are capable or

sourcing and sinking up to 50 mA, making them an

excellent choice for biasing the electro-absorption

modulator (EAM) in an EML. Additionally, the

AMC60804 IDACs support a full-scale output range of

150 mA with very low power dissipation, thus

eliminating the need for external components to bias

the EML laser diode. In combination the AMC60804

four VDACs and four IDACs enable accurate biasing

of up to four EML lasers.

The AMC60804 includes four input pins that are

multiplexed to the ADC and incorporate a low-latency

window comparator, making this device an excellent

choice for received signal strength indicator (RSSI)

and loss-of-signal (LOS) detection. The ADC is also

capable of measuring the voltage at the IDAC pins, as

well as the current being sourced or sinked by the

VDACs, thus enabling monitoring of these outputs.

The AMC60804 low power, high integration, very

small size, and wide operating temperature range

make the device an excellent choice as an all-in-one,

low-cost control circuit for the EML lasers found in

optical modules. Contact TI sales for the full data

sheet.

Device Information

PART NUMBER PACKAGE

(1)

BODY SIZE (NOM)

AMC60804 DSBGA (36) 2.56 mm × 2.56 mm

(1) For all available packages, see the package option

addendum at the end of the data sheet.

www.ti.com

AMC60804

SLASEZ2 – FEBRUARY 2021

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AMC60804

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

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