SSM2141PZ - Differential Line Receiver, 100dB CMR, 3MHz | ADI
MPN: SSM2141PZ ✓ Hoạt độngSSM2141PZ Tóm tắt
A balanced line receiver is a specialized analog building block that accepts a differential signal riding on a common-mode voltage (such as the long cable run from a stage to a mixing console) and converts it to a single-ended, ground-referenced output while rejecting the common-mode noise picked up along the way. In the audio signal chain hierarchy, the SSM2141 sits between the input connector / XLR stage and downstream ADC or line-level processing; it is part of the broader family of audio amplifiers and instrumentation amplifiers used in pro-audio and broadcast equipment.
Key differentiating specifications include 100 dB CMR (DC, typ), 70 dB CMR at 20 kHz and 62 dB at 40 kHz, 0.001% THD+N, 10 V/us slew rate, 3 MHz bandwidth, and a 600 ohm minimum load. Internal thin-film resistor networks are laser-trimmed to deliver matching that no off-the-shelf 0.1% discrete resistor approach can match at production volume, which is what enables the headline CMR figure.
Typical applications include balanced audio line receivers in mixing consoles and stage boxes, AES3 / EBU receiver front-ends, audio distribution amplifiers, and instrumentation front-ends where high DC and AC common-mode rejection is required. The 600 ohm load rating and +22 dBu headroom make it directly compatible with broadcast and studio analog line-level standards.
When designing with the SSM2141PZ, treat the gain-setting resistor (typically 10 kohm between pins 1 and 8 for unity gain) as a low-noise, low-drift metal-film part to preserve CMR. Add 100 ohm series output resistors plus 10 nF to ground at each output if cable capacitance will exceed ~1000 pF, to prevent oscillation. Decouple both supply pins with 0.1 uF ceramic in parallel with 10 uF tantalum or electrolytic, placed within 5 mm of the package.
This page synthesizes distributor pricing, drop-in alternatives, and practical PCB layout notes not found in the manufacturer datasheet alone, including cross-brand substitutes from Texas Instruments and Maxim that share the same 8-pin PDIP footprint and equivalent CMR-class performance.
Bộ thay thế dễ dàng lắp đặt cho SSM2141PZ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với SSM2141PZ (cùng hình factor và footprint) — khác nhau ở Common-Mode Rejection (20 kHz), Common-Mode Rejection (60 Hz), Common-Mode Rejection (DC), Package, Slew Rate.
SSM2141SZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SSM2141P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
SSM2143SZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SSM2143PZ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →INA217
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SSM2141PZ Tỷ lệ tối đa & tính chất điện
| Manufacturer | Analog Devices, Inc. |
| MPN | SSM2141PZ |
| Chức năng | Differential Line Receiver (Audio Amplifier) |
| Amplifier Class | AB |
| Number of Channels | 1 |
| Supply Voltage Range | ±6 V to ±18 V |
| Common-Mode Rejection (DC) | 100 dB typ |
| Common-Mode Rejection (60 Hz) | 100 dB typ |
| Common-Mode Rejection (20 kHz) | 70 dB typ |
| Common-Mode Rejection (40 kHz) | 62 dB typ |
| Total Harmonic Distortion + Noise | 0.001 % typ |
| Slew Rate | 10 V/us typ |
| Bandwidth | 3 MHz typ |
| Load Impedance | 600 ohm min |
| Hộp | PDIP-8 (PZ) |
| Kiểu lắp đặt | Through-Hole |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân SSM2141PZ
| Chân 1 | RG — Gain-setting resistor (connect to pin 8 for unity gain) |
| Chân 2 | IN- — Inverting differential input |
| Chân 3 | IN+ — Non-inverting differential input |
| Chân 4 | V- — Negative supply (typically -15 V) |
| Chân 5 | SENSE — Common / Sense (ground reference) |
| Chân 6 | OUT — Single-ended audio output |
| Chân 7 | V+ — Positive supply (typically +15 V) |
| Chân 8 | RG — Gain-setting resistor (connect to pin 1 for unity gain) |
Ứng dụng tiêu biểu
SSM2141PZ phù hợp cho 6 Áp dụngs: Pro-Audio Mixing Console Balanced Input Stage, Broadcast Audio Distribution Amplifier, AES3 / EBU Balanced Digital Audio Receiver Front-End, Industrial Instrumentation Front-End with High Common-Mode Voltage, Vintage Audio Equipment Restoration / Retrofit, Medical Patient Monitoring Analog Front-End.
Pro-Audio Mixing Console Balanced Input Stage
The SSM2141PZ is a near-ideal first stage for the XLR input of an analog mixing console. Its 100 dB CMR at 60 Hz (typ) directly translates into rejection of the 50/60 Hz ground-loop hum that dominates noise on long cable runs between stage and FOH mixer. With 0.001% THD+N and 600 ohm load drive capability, the SSM2141 preserves the full dynamic range of studio-grade microphone preamps feeding into it. Use a 10 kohm metal-film gain-set resistor between pins 1 and 8, and add 100 ohm output series resistors with 10 nF shunt caps if driving more than ~3 m of cable capacitance.
Được đề xuất
Broadcast Audio Distribution Amplifier
In a broadcast plant, the SSM2141PZ converts incoming balanced analog audio (e.g. from a satellite receiver or studio feed) into a single-ended signal that can be re-distributed across multiple balanced outputs. Its 3 MHz bandwidth and 10 V/us slew rate preserve the 20 kHz audio band with negligible phase shift at the upper edge, while 100 dB DC CMR rejects any DC offset on the incoming cable. Driving 600 ohm loads at +22 dBu headroom, the SSM2141 meets the EBU R68 specification for analog audio distribution in broadcast facilities.
Được đề xuất
AES3 / EBU Balanced Digital Audio Receiver Front-End
While the SSM2141PZ is an analog device, it is sometimes used as an analog front-end before an AES3 receiver IC to provide impedance matching and ground isolation on the XLR input. The 100 dB DC CMR is critical here because ground potential differences between AES3 sources can otherwise saturate downstream stages. Place the SSM2141PZ between the XLR connector and the AES3 line receiver, with a small RC low-pass filter (1 kohm + 100 pF) to roll off RF above the digital audio band. Its 3 MHz bandwidth is more than sufficient for the 6.144 MHz AES3 line rate's analog content.
Được đề xuất
Industrial Instrumentation Front-End with High Common-Mode Voltage
The SSM2141PZ's ±18 V supply range and 100 dB DC CMR make it suitable for industrial instrumentation that must reject high common-mode voltages, such as load-cell signal conditioning, strain-gauge bridges, and 4-20 mA current-loop receivers (with external shunt). Unlike a typical instrumentation amp, the SSM2141's audio-optimized noise floor (~-100 dBu) provides ample margin for 16-bit and 18-bit ADC downstream. Use precision 0.1% metal-film resistors for input attenuation if the common-mode voltage exceeds the supply rails.
Được đề xuất
Vintage Audio Equipment Restoration / Retrofit
The SSM2141PZ is widely used to retrofit vintage mixing consoles, tape machines, and microphone preamps that originally used discrete transistor or hybrid differential input stages. Its 8-pin PDIP footprint matches many legacy through-hole designs, enabling direct PCB drop-in for upgrading CMR without redesign. Audio engineers frequently specify the SSM2141PZ as a low-noise modern replacement for older THAT 1240 / INA101 implementations in service loops. Always verify the original input stage's gain-set resistor value to maintain compatibility.
Được đề xuất
Medical Patient Monitoring Analog Front-End
In medical patient monitoring equipment (ECG, EMG, EEG front-ends), the SSM2141PZ provides differential amplification of low-level biopotential signals while rejecting 50/60 Hz power-line interference through its 100 dB CMR at line frequency. The ±18 V supply range accommodates the typical ±12 V rails used in medical instrumentation, and the 600 ohm drive capability can feed shielded patient cables up to 3 m long without degradation. Add an AC-coupling input capacitor network and an RFI input filter (10 kohm + 10 nF to GND) for IEC 60601-1 patient-safety compliance.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SSM2141PZ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SSM2141SZ | SSM2141P | SSM2143SZ | SSM2143PZ | INA217 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Package | PDIP-8 (PZ) | SOIC-8 | PDIP-8 | SOIC-8 | PDIP-8 | SOIC-16 |
| Function | Differential Line Receiver | Differential Line Receiver | Differential Line Receiver | Differential Line Driver | Differential Line Driver | Instrumentation Amplifier |
| CMR at 60 Hz | 100 dB typ | 100 dB typ | 100 dB typ | N/A (driver spec) | N/A (driver spec) | 100 dB typ |
| Supply Voltage | ±6 V to ±18 V | ±6 V to ±18 V | ±6 V to ±18 V | ±6 V to ±18 V | ±6 V to ±18 V | ±4.5 V to ±18 V |
| Slew Rate | 10 V/us typ | 10 V/us typ | 10 V/us typ | 10 V/us typ | 10 V/us typ | 15 V/us typ |
| Bandwidth | 3 MHz typ | 3 MHz typ | 3 MHz typ | 3 MHz typ | 3 MHz typ | 3.4 MHz typ |
| THD+N | 0.001 % typ | 0.001 % typ | 0.001 % typ | 0.0006 % typ | 0.0006 % typ | 0.0015 % typ |
Bảo phân biệt quan trọng
- Integrated laser-trimmed thin-film resistor network delivers 100 dB CMR at DC and 60 Hz - 60 dB better than a discrete op-amp + 4-resistor implementation (vsGeneric op-amp + 0.1% discrete resistors)
- Purpose-designed for 600 ohm pro-audio line-level loading with +22 dBu headroom at ±15 V supplies (vsINA217 (TI instrumentation amplifier))
- Complementary SSM2143PZ driver exists in identical 8-pin PDIP package, enabling matched input/output stages in pro-audio designs (vsDiscrete differential driver designs)
Ghi chú thiết kế
Decouple both V+ (pin 7) and V- (pin 4) with a 0.1 uF ceramic capacitor in parallel with a 10 uF tantalum or electrolytic, placed within 5 mm of the package. The dual-supply high-CMR architecture is sensitive to power-supply noise: any ripple on V+ or V- directly degrades CMRR at the corresponding frequency. Use a star-ground topology with the analog ground return from pin 5 (SENSE) connecting back to the supply ground at a single point to avoid ground-loop-induced CMRR collapse.
Do NOT substitute generic 0.1% resistors for the gain-setting resistor between pins 1 and 8. The SSM2141's 100 dB CMR depends on the internal thin-film resistor network being matched; external discrete resistors, even 0.01% parts, do not track the internal network over temperature and will degrade CMRR. Use the recommended 10 kohm metal-film part. Also avoid running output (pin 6) directly into long capacitive cables without a 100 ohm series resistor + 10 nF shunt to ground, which prevents oscillation on loads exceeding ~1000 pF.
Route the differential input traces (pins 2 and 3) as a tightly-coupled pair, ideally with constant 8-10 mil spacing over a continuous ground pour beneath them. Any length mismatch converts common-mode noise into differential-mode noise, directly degrading the SSM2141's 100 dB CMRR figure. Keep the input pair away from the output (pin 6) trace to minimize feedback. Place the gain resistor (pins 1 to 8) symmetrically with its leads of equal length to avoid parasitic mismatch.
Thông tin tuân thủ
RoHS and REACH compliance per Analog Devices product page. Not AEC-Q100 qualified - this is an industrial/pro-audio part, not automotive. Lead-free and halogen-free per the manufacturer's environmental compliance disclosure.
