SSM2143PZ - Audio Differential Line Receiver, 90dB CMR | Analog Devices
料号： SSM2143PZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.92 | $7.92 |
| 10 | $7.05 | $70.50 |
| 100 | $6.05 | $605.00 |
| 500 | $5.18 | $2,590.00 |
| 1,000 | $4.46 | $4,460.00 |
SSM2143PZ 概述
An audio line receiver is the front-end gain stage that converts a balanced, twisted-pair analog signal — typically carried on XLR or TRS cable runs — into a single-ended ground-referenced signal that downstream ADC, mixing, or amplifier stages can use. Its defining role is rejecting common-mode noise (mains hum, RF pickup, ground-loop voltage) that appears equally on both signal lines while preserving the differential audio content. Receivers such as the SSM2143PZ therefore sit at the top of the analog signal-path hierarchy: transducer -> line receiver -> ADC/mixer -> power amplifier -> speaker.
Key features include an ultra-low total harmonic distortion of 0.0006% typical at 1 kHz (less than 0.004% across the full audio band), a fast 10 V/us slew rate, and a wide 7 MHz small-signal bandwidth. The device operates from dual supplies of ±6 V to ±18 V (single supply 6 V to 36 V) and draws only 2.7 mA quiescent supply current. The input stage handles signals as large as +28 dBu at the nominal G = 1/2 configuration, allowing direct connection to professional +4 dBu consoles without external attenuation. Although optimized for G = 1/2, a gain of 2 is realized by reversing the +IN/-IN and SENSE/REFERENCE connections.
The SSM2143 architecture combines a precision operational front-end with four on-chip laser-trimmed thin-film resistors that set the gain and provide the matched impedance ratio required for high CMR. Internal overdrive clamping protects downstream stages when large common-mode or differential transients appear on the line, eliminating the need for external protection diodes in most studio and stage installations.
Typical applications include balanced audio line receivers in mixing consoles, microphone preamplifier inputs, A/D converter driver stages in audio digitizers, broadcast and recording-studio equipment, and stage-box interfaces for live sound. Its high CMR also makes it well suited to industrial instrumentation where long cables carry small analog signals in electrically noisy environments.
When designing with the SSM2143PZ, route input traces as a tightly coupled, length-matched pair and place 0.1 uF supply-decoupling capacitors within 5 mm of the supply pins. The device is specified for operation from -40 C to +85 C and remains RoHS-compliant; the SOIC-8 (S) variant should be selected for reflow-compatible SMT designs.
This page synthesizes distributor pricing, parametric cross-references, and PCB-level design guidance for the SSM2143PZ beyond what the manufacturer datasheet alone provides.
直接替换替代料： SSM2143PZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SSM2143PZ （相同外形与封装尺寸） ——差异在于 Common-Mode Rejection (20 kHz), Common-Mode Rejection (60 Hz), Common-Mode Rejection (DC), Package, Slew Rate.
快速对比工具——选择替代料号进行并排对比：
SSM2143P
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SSM2143SZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
INA134PA
✅ 直接替换📋 参考替代料（不在目录中）
INA137PA
✅ 直接替换📋 参考替代料（不在目录中）
SSM2142PZ
✅ 直接替换📋 参考替代料（不在目录中）
SSM2143PZ 最大额定值与电气特性
| Amplifier Type | Audio Differential Line Receiver |
| Number of Circuits | 1 |
| Nominal Gain (G = 1/2) | 0.5 (configurable to 2) |
| 输出类型 | Single-ended |
| Slew Rate | 10 V/us typical |
| -3 dB Bandwidth | 7 MHz typical |
| Common-Mode Rejection (DC) | 90 dB typical |
| Common-Mode Rejection (60 Hz) | 90 dB typical |
| Common-Mode Rejection (20 kHz) | 85 dB typical |
| Total Harmonic Distortion + Noise | 0.0006 % typical at 1 kHz; <0.004 % full audio band |
| 电源电流 | 2.7 mA typical |
| Supply Voltage Range (Dual) | ±6 V to ±18 V |
| Supply Voltage Range (Single) | 6 V to 36 V |
| Maximum Differential Input | +28 dBu at G = 1/2 |
| 工作温度 | -40 C to +85 C |
| 封装 | 8-PDIP (PZ), 0.300 in / 7.62 mm |
| 安装类型 | Through-Hole |
| RoHS 状态 | Compliant |
SSM2143PZ 引脚配置
| 引脚 1 | +IN — Non-inverting differential input |
| 引脚 2 | -IN — Inverting differential input |
| 引脚 3 | V- — Negative supply |
| 引脚 4 | REF/SENSE — Reference/sense for gain configuration |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | OUTPUT — Single-ended output |
| 引脚 7 | V+ — Positive supply |
| 引脚 8 | NC — Not connected (per datasheet) |
典型应用
SSM2143PZ 适用于 6 应用s: Balanced Audio Line Receiver (Mixing Console Input), Microphone Preamplifier Input Stage, Audio A/D Converter Driver Stage, Broadcast and Recording Studio Equipment, Industrial Instrumentation Signal Conditioning, Stage Box and Live Sound Snake Systems.
Balanced Audio Line Receiver (Mixing Console Input)
The SSM2143PZ is the canonical front-end for balanced line-level inputs on professional mixing consoles and stage boxes, where the priority is rejecting common-mode hum, RF interference, and ground-loop voltage picked up on long XLR cable runs. Its 90 dB CMRR at 60 Hz and 85 dB at 20 kHz, combined with 0.0006 % THD at 1 kHz, allow direct connection of +4 dBu console sources without external padding. Designers place the SSM2143PZ between the XLR connector and the channel insert/metering bus, with the OUTPUT node feeding the channel fader and pan circuitry. The fixed G = 1/2 attenuation also makes downstream op-amp gain stages easier to design, since input-referred noise and offset are scaled predictably.
推荐
Microphone Preamplifier Input Stage
In high-fidelity microphone preamps the SSM2143PZ is often used as the balanced-line-to-ground-referenced converter that feeds a transformer-coupled or discrete gain stage. The combination of 90 dB CMRR, 7 MHz bandwidth, and 10 V/us slew rate preserves the transient content of percussive and vocal sources while rejecting the 50/60 Hz hum that couples into long mic cables. The integrated laser-trimmed thin-film resistor network eliminates the cost and tolerance matching burden of a discrete INA implementation, while the internal overdrive clamping protects the downstream A/D converter when the stage is hot-plugged into phantom-powered lines. Pair the SSM2143PZ with a low-noise op-amp (e.g. SSM2017) and a high-quality audio ADC for a complete prosumer preamp design.
推荐
Audio A/D Converter Driver Stage
When driving a professional audio ADC from a balanced source, the SSM2143PZ provides the necessary single-ended conversion plus 90 dB common-mode rejection in a single stage. Its 0.0006 % THD at 1 kHz and <0.004 % across the full audio band ensure that the receiver itself does not become the bottleneck in the signal chain, while the +28 dBu differential input capability means the SSM2143PZ can accept studio +4 dBu levels without saturation. Design-wise, place the SSM2143PZ within 30 mm of the ADC analog input pins, route balanced traces as a tightly-coupled length-matched pair, and add 0.1 uF decoupling on each supply pin within 5 mm of the package to preserve CMRR performance.
推荐
Broadcast and Recording Studio Equipment
In broadcast studios and recording environments the SSM2143PZ serves as the line receiver in patch bays, monitor controllers, and DAW interface cards where ground loops and RFI are persistent problems. The 90 dB CMRR at 60 Hz directly attenuates mains hum induced between pieces of equipment on different mains phases, while the 85 dB CMRR at 20 kHz keeps high-frequency RF interference (from lighting dimmers, switching supplies, and broadcast transmitters) out of the recording chain. The device's ±6 V to ±18 V dual supply operation aligns with the standard ±15 V rails found in rack-mount studio equipment, simplifying power architecture and avoiding the need for extra regulation stages.
推荐
Industrial Instrumentation Signal Conditioning
Beyond audio, the SSM2143PZ finds use in industrial instrumentation where long shielded twisted pairs carry low-level analog signals (e.g. strain-gauge, thermocouple, or process-current signals) through electrically noisy factory environments. The 90 dB CMRR at DC provides strong rejection of DC ground-potential differences that arise between remote sensor sites and the host controller, while the 7 MHz bandwidth handles step-response settling for pulsed or dynamic measurements. The integrated thin-film resistor network and factory calibration reduce the bill-of-materials and trim overhead that a discrete instrumentation amplifier would otherwise require, making the SSM2143PZ attractive for cost-sensitive industrial designs.
推荐
Stage Box and Live Sound Snake Systems
In live-sound stage-box and multi-channel snake systems, the SSM2143PZ provides a compact, low-cost receiver per channel that converts balanced mic or line signals from the stage to single-ended signals for the front-of-house console. The 90 dB CMRR is essential here because stage cables often run near dimmers and motor loads that inject significant common-mode noise; the SSM2143PZ attenuates this noise while its 0.0006 % THD preserves audio fidelity. The 8-PDIP through-hole form factor supports rugged stage-box card cages that use through-hole assembly for mechanical robustness. Designers commonly place 8 or 16 SSM2143PZ receivers per stage-box card, sharing ±15 V supply rails and ground planes to minimize channel-to-channel crosstalk.
推荐
推荐产品汇总
工程参考数据： SSM2143PZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SSM2143P | SSM2143SZ | INA134PA | INA137PA | SSM2142PZ |
|---|---|---|---|---|---|---|
| Package | 8-PDIP (PZ) | 8-PDIP - same | 8-SOIC (different footprint) | 8-PDIP - same | 8-PDIP - same | 8-PDIP - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Analog Devices |
| Function | Line Receiver (input) | Line Receiver | Line Receiver | Line Receiver | Line Receiver | Line Driver (output, complementary) |
| CMRR (60 Hz) | 90 dB | 90 dB | 90 dB | ~80 dB | ~70 dB | 90 dB |
| Slew Rate | 10 V/us | 10 V/us | 10 V/us | 5 V/us | 14 V/us | 10 V/us |
| Bandwidth | 7 MHz | 7 MHz | 7 MHz | 3.1 MHz | 3.5 MHz | 7 MHz |
| THD (1 kHz typ) | 0.0006 % | 0.0006 % | 0.0006 % | 0.002 % | 0.002 % | 0.0006 % |
| Supply Current (typ) | 2.7 mA | 2.7 mA | 2.7 mA | 3 mA | 3 mA | 2.7 mA |
关键差异点
- Industry-leading 90 dB CMRR at 60 Hz （对比 INA134PA)
- Ultra-low 0.0006 % THD at 1 kHz （对比 INA137PA)
- Integrated thin-film resistor network laser-trimmed to 0.005 % （对比 Discrete INA implementation)
设计说明
Route the +IN and -IN traces as a tightly coupled, length-matched differential pair from the XLR/TRS connector to the SSM2143PZ input pins. Trace impedance of 90-110 ohm (differential) is recommended for long cable runs to preserve CMRR performance at high frequencies. The Analog Devices SSM2143 datasheet notes that mismatches greater than 0.1 mm in trace length can reduce CMRR by 6-10 dB at 20 kHz.
Place 0.1 uF ceramic supply-decoupling capacitors within 5 mm of each of the V+ (pin 7) and V- (pin 3) pins, with a shared 10 uF bulk decoupling capacitor near the supply entry point. The SSM2143PZ draws only 2.7 mA typical quiescent current, but the high CMRR at 90 dB depends on clean supply rails - any switching noise coupling into the supplies will degrade common-mode rejection by approximately 1:1.
Do not confuse the SSM2143PZ (line receiver, G = 1/2) with the SSM2142PZ (line driver, G = 2). They share the same PDIP-8 footprint but are functionally complementary. Installing a SSM2142PZ where a SSM2143PZ is expected will result in incorrect signal gain direction and likely saturate the downstream stage. Verify the pin labels against the Analog Devices datasheet before PCB assembly, and ensure the -P (non-RoHS) and -PZ (RoHS) suffixes are properly specified for the project's compliance requirements.
Keep the SSM2143PZ input traces physically separated from digital and power-switching traces on the PCB. The 90 dB CMRR assumes a clean analog ground - any digital switching noise that couples into the ground reference will bypass the differential conversion and appear directly at the OUTPUT pin. Use a dedicated analog ground plane under the SSM2143PZ and join the analog and digital grounds only at the system star-point near the power supply.
合规信息
RoHS-compliant per Analog Devices product page. Not AEC-Q100 qualified - this is a commercial/industrial-grade audio IC. The non-RoHS -P variant is available for legacy systems.
